{"id":1401,"date":"2023-06-27T13:54:27","date_gmt":"2023-06-27T05:54:27","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=1401"},"modified":"2023-06-27T13:54:27","modified_gmt":"2023-06-27T05:54:27","slug":"%e8%b6%85%e8%af%a6%e7%bb%86%e7%9a%84java-io%e7%b1%bb%e8%ae%b2%e8%a7%a3%e8%bf%91%e4%b8%89%e4%b8%87%e5%ad%97","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/java\/%e8%b6%85%e8%af%a6%e7%bb%86%e7%9a%84java-io%e7%b1%bb%e8%ae%b2%e8%a7%a3%e8%bf%91%e4%b8%89%e4%b8%87%e5%ad%97\/","title":{"rendered":"\u8d85\u8be6\u7ec6\u7684JAVA IO\u7c7b\u8bb2\u89e3(\u8fd1\u4e09\u4e07\u5b57)"},"content":{"rendered":"
\n
\n

Java IO\u7c7b<\/span><\/h1>\n

\u524d\u8a00<\/span><\/h2>\n

\u5927\u5bb6\u597d\uff0c\u4e00\u76f4\u4ee5\u6765\u6211\u90fd\u672c\u7740 \u7528\u6700\u901a\u4fd7\u7684\u8bdd\u7406\u89e3\u6838\u5fc3\u7684\u77e5\u8bc6\u70b9<\/span>\uff0c \u6211\u8ba4\u4e3a\u6240\u6709\u7684\u96be\u70b9\u90fd\u79bb\u4e0d\u5f00 \u300c\u57fa\u7840\u77e5\u8bc6<\/span>\u300d<\/strong> \u7684\u94fa\u57ab<\/p>\n

<\/mpprofile><\/section>\n

\u80cc\u666f<\/span><\/h2>\n

\u672c\u8282\u7ed9\u5927\u5bb6\u8bb2\u8bb2 \u300cJava\u7684IO\u7c7b<\/span>\u300d<\/strong> \uff0c\u4e4b\u524d\u6211\u4eec\u5b66\u4e60\u7684\u77e5\u8bc6\u90fd\u662f\u81ea\u5df1\u8ddf\u81ea\u5df1\u73a9\uff0c\u6ca1\u6709\u6d89\u53ca\u5230\u8ddf\u7cfb\u7edf\u4ea4\u4e92\uff0c\u4e3e\u4e2a\u4f8b\u5b50\u6bd4\u5982\u6211\u4eec\u9700\u8981\u5c06\u6211\u4eec\u5b9a\u4e49\u7684\u4e00\u6bb5\u6587\u5b57\u4fdd\u5b58\u5230\u6587\u4ef6\u4e2d\uff0c\u90a3\u4e48\u5982\u4f55\u505a\u5462,\u8fd9\u5c31\u662f\u672c\u8282\u6240\u8bb2\u7684\u4e3b\u8981\u5185\u5bb9JAVA\u7684 \u300cIO<\/span>\u300d<\/strong> \u76f8\u5173\u64cd\u4f5c~<\/p>\n

\u300c\u957f\u6587\u9884\u8b66 \u8010\u5fc3\u770b\u5b8c\u54e6 ~\u300d<\/strong><\/p>\n

\u4ec0\u4e48\u662fIO<\/span><\/h2>\n

\u5728\u5b66\u4e60Java IO\u64cd\u4f5c\u4e4b\u524d\uff0c\u5148\u7406\u89e3\u4e00\u4e0b\u4ec0\u4e48\u662f \u300cIO<\/span>\u300d<\/strong> \u64cd\u4f5c\uff1f<\/p>\n

\u4e4b\u524d\u6211\u4eec\u5b66\u4e60Java\u8bed\u6cd5\u7684\u65f6\u5019\uff0c\u6bd4\u5982\u547d\u540d\u53d8\u91cf\uff0c\u8c03\u7528\u7c7b\u65b9\u6cd5\u6267\u884c\u4e00\u4e9b\u8ba1\u7b97\u7b49\u7b49\uff0c\u8fd9\u4e9b\u5176\u5b9e\u90fd\u662f\u5728\u8ba1\u7b97\u673a\u5185\u5b58\u91cc\u73a9\u7684\u3002\u5f88\u663e\u7136\u5728\u6211\u4eec\u5e73\u65f6\u4f7f\u7528\u7684\u4e00\u4e9b\u8f6f\u4ef6\uff0c\u5b83\u4eec\u90fd\u9700\u8981\u8ddf\u5404\u79cd\u5404\u6837\u7684\u786c\u4ef6\u6253\u4ea4\u9053\uff0c\u6bd4\u5982\u89c6\u9891\u901a\u8bdd\u5c31\u9700\u8981\u8ddf\u6211\u4eec\u7684\u6444\u50cf\u5934\u3001\u97f3\u9891\u4e4b\u7c7b\u7684\u786c\u4ef6\u8fdb\u884c\u4ea4\u4e92\uff0c\u518d\u6bd4\u5982\u6211\u4eec\u6253\u5b57\u7684\u952e\u76d8\uff0c\u7535\u8111\u7684\u663e\u793a\u5668\u7b49\uff0c\u8fd9\u4e9b\u901a\u5e38\u53eb\u505a\u5916\u8bbe\u3002<\/p>\n

\u8ba1\u7b97\u673a\u8bed\u8a00\u901a\u5e38\u90fd\u8981\u63d0\u4f9b\u4e0e\u5b83\u4eec\u64cd\u4f5c\u7684\u63a5\u53e3\uff0c\u6240\u4ee5\u5c31\u5f15\u7533\u4e86 \u300cIO\u6846\u67b6<\/span>\u300d<\/strong> \u8fd9\u4e48\u4e2a\u4e1c\u897f\u3002\u90a3\u4e48\u5230\u5e95\u662f\u600e\u4e48\u8fdb\u884c\u4ea4\u4e92\u7684\u5462\uff1f\u4e3e\u4e2a\u952e\u76d8\u7684\u4f8b\u5b50\uff0c\u901a\u5e38\u6211\u4eec\u7684\u952e\u76d8\u90fd\u901a\u8fc7\u4e00\u4e2aUSB\u53e3\uff0c\u90a3\u4e48\u8fde\u7740\u5b83\u7684\u662f\u6570\u636e\u7ebf\uff0c\u5b83\u4eec\u7684\u4ea4\u4e92\u662f\u901a\u8fc7\u6570\u636e\u7ebf\u8fdb\u884c\u6570\u636e\u7684\u4f20\u8f93\uff0c\u5f53\u7136\uff0c\u5982\u679c\u662f\u65e0\u7ebf\u8bbe\u5907\uff0c\u90a3\u4e48\u901a\u5e38\u90fd\u662f\u901a\u8fc7\u84dd\u7259\u4f20\u8f93\u6570\u636e\u3002\u90a3\u4e48\u8fd9\u4e2a\u6570\u636e\u7684\u5f62\u5f0f\u662f\u600e\u4e48\u6837\u7684\u5462\uff1f\u5b83\u5c31\u662f \u6bd4\u7279\u6d41<\/span>\uff0c\u5355\u4f4d\u5c31\u662f\u6211\u4eec\u5e38\u8bf4\u7684\u5b57\u8282\uff0c\u901a\u5e38\u67098\u4f4d0\u62161\u7ec4\u6210\u7684\u4e00\u6bb5\u6570\u636e\u3002<\/p>\n

\u65e2\u7136\u6709\u4f20\u8f93\uff0c\u597d\u6bd4\u81ea\u6765\u6c34\u7ba1\uff0c\u6709\u8f93\u5165\u7aef\u548c\u8f93\u51fa\u7aef, \u90a3\u4e48\u80af\u5b9a\u6709 \u300c\u8f93\u5165\u6d41(InputStream)<\/span>\u300d<\/strong> \u548c \u300c\u8f93\u51fa\u6d41(OutputStream)<\/span>\u300d<\/strong>,\u8fd8\u662f\u521a\u521a\u7684\u4f8b\u5b50\uff0c\u90a3\u4e48\u8f93\u5165\u7aef\u548c\u8f93\u51fa\u7aef\u5206\u522b\u662f\u4ec0\u4e48\u5462\uff1f<\/p>\n

\u5176\u5b9e\u4e5f\u5f88\u597d\u5224\u65ad\uff0c\u5b83\u65e2\u7136\u662f\u4e00\u4e2a\u6709\u65b9\u5411\u6027\u7684\uff0c\u90a3\u4e48 \u300c\u8f93\u5165\u6d41(InputStream)<\/span>\u300d<\/strong> \u5c31\u662f\u7531\u5916\u5411\u5185\uff0c \u300c\u8f93\u51fa\u6d41(OutputStream)<\/span>\u300d<\/strong> \u5c31\u662f\u7531\u5185\u5411\u5916\u3002\u90a3\u4e48\u4f8b\u5b50\u4e2d\u7684\u952e\u76d8\u5c31\u662f\u8f93\u5165\u8bbe\u5907\uff0c \u8ba1\u7b97\u673a\u5c31\u662f\u8f93\u51fa\u7aef\uff0c\u7ec6\u8bb2\u5c31\u662f\u6570\u636e\u901a\u8fc7\u5185\u5b58\u5411\u5916\u8f93\u51fa\u3002\u597d\u4e86\uff0c\u6709\u4e86\u8fd9\u4e9b\u7684\u57fa\u672c\u6982\u5ff5\uff0c\u6211\u4eec\u5728\u770bJava\u7684 \u300cIO<\/span>\u300d<\/strong> \u76f8\u5173\u64cd\u4f5c\u5c31\u6709\u4e00\u4e2a\u5f88\u597d\u7684\u7406\u89e3\u4e86\u3002<\/p>\n

\u8fd8\u662f\u90a3\u53e5\u8bdd\uff0c\u4e0d\u8981\u6b7b\u8bb0\u786c\u80cc\u76f8\u5173\u7c7b\u548c\u65b9\u6cd5\uff0c\u8981\u77e5\u9053\u5b83\u7684\u539f\u7406\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u8fdb\u5165\u6b63\u9898~<\/p>\n

File\u64cd\u4f5c<\/span><\/h2>\n

\u300cFile<\/span>\u300d<\/strong> \u5373\u6587\u4ef6\u64cd\u4f5c\uff0c\u901a\u5e38\u548c\u8ba1\u7b97\u673a\u7684\u78c1\u76d8\u6253\u4ea4\u9053\uff0c\u8fd9\u4e5f\u662f\u6700\u57fa\u672c\u7684\u64cd\u4f5c\u4e86\u3002\u5728\u6211\u4eec\u5e73\u65f6\u64cd\u4f5c\u6587\u4ef6\u7684\u65f6\u5019\uff0c\u6709\u6587\u4ef6\u5939\u548c\u6587\u4ef6\u64cd\u4f5c\uff0c\u57fa\u672c\u7684\u521b\u5efa\u3001\u4fee\u6539\u3001\u5220\u9664\u7b49\u64cd\u4f5c\uff0c\u5728Java\u4e2d\u662f \u300cFile<\/span>\u300d<\/strong> \u7c7b\u53bb\u505a\u7684\u4e00\u4e9b\u76f8\u5173\u64cd\u4f5c,\u6240\u4ee5\u6211\u4eec\u9700\u8981\u5148\u5b9e\u4f8b\u5316\u5b83\u3002<\/p>\n

\u6587\u4ef6\u64cd\u4f5c<\/span><\/h3>\n

\u5728\u5f53\u524d\u76ee\u5f55\u521b\u5efa\u4e00\u4e2a\u6587\u4ef6<\/p>\n

<\/span>File txt = new<\/span> File(\"test.txt\"<\/span>);

\/\/ \u5224\u65ad\u662f\u5426\u5b58\u5728<\/span>
if<\/span>(txt.exists()) {
    Log.info(\"File \u5b58\u5728\"<\/span>);
}else<\/span> {
    try<\/span> {
        \/\/ \u521b\u5efa\u6587\u4ef6<\/span>
        if<\/span>(txt.createNewFile())
            Log.info(\"\u521b\u5efa\u6210\u529f\"<\/span>);
    } catch<\/span>(IOException e) {
        Log.info(\"err-->\"<\/span> + e.getMessage());
    }
}

<\/code><\/pre>\n
\u91cd\u547d\u540d\u6587\u4ef6:<\/p>\n
<\/span>if<\/span>(txt.exists()) {
    if<\/span>(txt.renameTo(new<\/span> File(\"test1.txt\"<\/span>)))
        Log.info(\"\u91cd\u547d\u540d\u6210\u529f\"<\/span>);

}
<\/code><\/pre>\n
\u5220\u9664\u6587\u4ef6:<\/p>\n
<\/span> if<\/span>(txt.exists()) {
      if<\/span>(txt.delete())
          Log.info(\"txt \u5220\u9664\u6210\u529f\"<\/span>);
  }
<\/code><\/pre>\n
\u521b\u5efa\u6587\u4ef6\u5939:<\/p>\n
<\/span> File dir = new<\/span> File(\"test\"<\/span>);
  if<\/span>(!dir.exists()) {
      if<\/span>(dir.mkdir())
          Log.info(\"\u6587\u4ef6\u5939\u521b\u5efa\u6210\u529f\"<\/span>);

      \/\/ \u5224\u65ad\u662f\u5426\u662f\u6587\u4ef6\u5939<\/span>
      if<\/span>(dir.isDirectory())
          Log.info(\"\u662f\u6587\u4ef6\u5939\"<\/span>);
  }
<\/code><\/pre>\n
\u521b\u5efa\u5d4c\u5957\u6587\u4ef6\u5939:<\/p>\n
<\/span>if<\/span>(!dir1.exists()) {
    if<\/span>(dir1.mkdirs())
        Log.info(\"\u6587\u4ef6\u5939\u521b\u5efa\u6210\u529f1\"<\/span>);

    \/\/ \u5224\u65ad\u662f\u5426\u662f\u6587\u4ef6\u5939<\/span>
    if<\/span>(dir1.isDirectory())
        Log.info(\"\u662f\u6587\u4ef6\u59391\"<\/span>);
}
<\/code><\/pre>\n
\u5c5e\u6027\u76f8\u5173\u64cd\u4f5c:<\/p>\n
<\/span>  File txt1 = new<\/span> File(\"test1.txt\"<\/span>);
  Log.info(\"\u83b7\u53d6\u7236\u8def\u5f84 ---->\"<\/span> + new<\/span> File(txt1.getAbsolutePath()).getParent());

  Log.info(\"\u6587\u4ef6\u5927\u5c0f---->\"<\/span> + txt1.length() + \"byte\"<\/span>); \/\/ 0 byte<\/span>

  Log.info(\"\u6587\u4ef6\u662f\u5426\u9690\u85cf----->\"<\/span> + txt1.isHidden()); \/\/ false<\/span>

  Log.info(\"\u6587\u4ef6\u662f\u5426\u53ef\u8bfb----->\"<\/span> + txt1.canRead()); \/\/ true<\/span>

  Log.info(\"\u6587\u4ef6\u662f\u5426\u53ef\u5199----->\"<\/span> + txt1.canWrite()); \/\/ true<\/span>

  Log.info(\"\u83b7\u53d6\u6587\u4ef6\u8def\u5f84---->\"<\/span> + txt1.getPath()); \/\/ test1.txt<\/span>

  \/\/ \u5c5e\u6027\u8bbe\u7f6e<\/span>
  txt1.setReadable(false<\/span>);  \/\/ \u662f\u5426\u53ef\u8bfb<\/span>
  txt1.setWritable(false<\/span>); \/\/ \u662f\u5426\u53ef\u5199<\/span>
  txt1.setExecutable(false<\/span>); \/\/ \u662f\u5426\u53ef\u6267\u884c<\/span>
  txt1.setLastModified(new<\/span> Date().getTime()); \/\/ \u6700\u540e\u4fee\u6539\u65f6\u95f4<\/span>
  txt1.setReadOnly(); \/\/ \u8bbe\u7f6e\u53ea\u8bfb<\/span>
<\/code><\/pre>\n
\u4ee5\u4e0a\u662f\u5927\u90e8\u5206\u5e38\u7528\u7684\u6587\u4ef6\u76f8\u5173\u64cd\u4f5c ~<\/p>\n
\u5b57\u8282\u64cd\u4f5c\uff1aInputStream \u548c OutputStream<\/span><\/h2>\n
\u4e0a\u8fb9\u6211\u4eec\u8bb2\u8ff0\u4e86\u6587\u4ef6\u7684\u76f8\u5173\u64cd\u4f5c\uff0c\u6211\u4eec\u521b\u5efa\u7684\u6587\u4ef6\u90fd\u662f\u7a7a\u767d\u7684\uff0c\u73b0\u5728\u9700\u8981\u6211\u4eec\u5f80\u6587\u4ef6\u91cc\u5199\u4e00\u4e9b\u6587\u5b57\u600e\u4e48\u64cd\u4f5c\u5462\uff1f\u8fd9\u5c31\u9700\u8981\u7528\u5230\u6211\u4eec\u4e4b\u524d\u8bb2\u7684  \u300cIO<\/span>\u300d<\/strong> \u64cd\u4f5c\u6d41\u4e86~<\/p>\n
<\/p>\n
\u6587\u4ef6\u590d\u5236<\/span><\/h3>\n
\u8fd8\u662f\u4ee5\u4e00\u4e2a\u4f8b\u5b50\u6765\u8bb2\uff0c\u6211\u4eec\u590d\u5236\u4e00\u4e2a\u6587\u4ef6\uff0c\u70b9\u70b9\u9f20\u6807\u53f3\u952e\u5c31\u89e3\u51b3\u4e86\uff0c\u90a3\u4e48\u5728Java\u4e2d\uff0c\u6211\u4eec\u5982\u4f55\u4f7f\u7528\u7a0b\u5e8f\u6765\u8fdb\u884c\u6587\u4ef6\u62f7\u8d1d\u5462\uff1f<\/p>\n
\u4e3b\u8981\u8fc7\u7a0b\u5206\u4e3a\u4ee5\u4e0b\u8fc7\u7a0b:<\/p>\n
    \n
  • \n
    \n
    \u5b9a\u4e49\u8f93\u5165\u7684\u6587\u4ef6\u8def\u5f84\u548c\u8f93\u51fa\u7684\u6587\u4ef6\u8def\u5f84\uff08\u7531\u8def\u5f84+\u6587\u4ef6\u540d\u542b\u6587\u4ef6\u683c\u5f0f\u540e\u7f00\u7ec4\u6210\uff09<\/p>\n<\/section>\n<\/li>\n
  • \n
    \n
    \u5b9a\u4e49 \u300c\u6587\u4ef6\u8f93\u5165\u6d41(FileInputStream)<\/span>\u300d<\/strong> \u548c \u300c\u6587\u4ef6\u8f93\u51fa\u6d41(FileOutputStream)<\/span>\u300d<\/strong><\/p>\n<\/section>\n<\/li>\n
  • \n
    \n
    \u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\uff0c\u5199\u5165\u76ee\u6807\u6587\u4ef6<\/p>\n<\/section>\n<\/li>\n
  • \n
    \n
    \u5173\u95ed\u6d41\u901a\u9053<\/p>\n<\/section>\n<\/li>\n<\/ul>\n
    \u5bf9\u5e94\u7684\u4ee3\u7801\u5982\u4e0b:<\/p>\n
    <\/span>  \/**
         * \u6587\u4ef6\u590d\u5236
         * @param<\/span> src  \u8f93\u5165\u7684\u6587\u4ef6\u8def\u5f84
         * @param<\/span> dest \u8f93\u51fa\u7684\u6587\u4ef6\u8def\u5f84
         *\/<\/span>
        public<\/span> static<\/span> void<\/span> copyFile<\/span>(String src, String dest)<\/span> throws<\/span> IOException <\/span>{
            FileInputStream fis = new<\/span> FileInputStream(src);
            FileOutputStream oos = new<\/span> FileOutputStream(dest);

            \/\/ \u521d\u59cb\u5316buffer \u7f13\u51b2\u533a<\/span>
            byte<\/span>[] buffer = new<\/span> byte<\/span>[1024<\/span> * 2<\/span>];

            int<\/span> cnt;

            \/**
             * read() and write()
             *
             * @param<\/span> b \u8bfb\u53d6\u6570\u636e\u7684\u7f13\u51b2\u533a\u3002 @param<\/span> off \u76ee\u6807\u6570\u7ec4\u4e2d\u7684\u8d77\u59cb\u504f\u79fb\u91cf <code>b<code> @param<\/span> len \u8bfb\u53d6\u7684\u6700\u5927\u5b57\u8282\u6570\u3002
             * @return<\/span> \u8bfb\u5165\u7f13\u51b2\u533a\u7684\u603b\u5b57\u8282\u6570\uff0c\u6216\u8005 <code>-1<code> \u5982\u679c\u7531\u4e8e\u5df2\u5230\u8fbe\u6587\u4ef6\u672b\u5c3e\u800c\u6ca1\u6709\u66f4\u591a\u6570\u636e\u3002
             *\/<\/span>
            while<\/span>((cnt = fis.read(buffer, 0<\/span>, buffer.length)) != -1<\/span>) {
                \/\/ \u5199\u5165\u6587\u4ef6<\/span>
                oos.write(buffer, 0<\/span>, cnt);
            }

            \/\/ \u5173\u95ed\u901a\u9053<\/span>
            fis.close();
            oos.close();
        }
    <\/code><\/pre>\n
    \u5b57\u7b26\u64cd\u4f5c<\/span><\/h2>\n
    \u4e0a\u8fb9\u6211\u4eec\u5b9e\u73b0\u4e86\u4e00\u4e2a\u6587\u4ef6\u590d\u5236\u7684\u4f8b\u5b50\uff0c\u6211\u4eec\u53ea\u662f\u62f7\u8d1d\u6e90\u6587\u4ef6\uff0c\u6ca1\u6709\u6d89\u53ca\u5230\u91cc\u8fb9\u7684\u5185\u5bb9\u64cd\u4f5c\uff0c\u63a5\u4e0b\u6765\u5b66\u4e60\u4e00\u4e0b\u5b57\u7b26\u64cd\u4f5c<\/p>\n
    \u7f16\u7801\u4e0e\u89e3\u7801<\/span><\/h3>\n
    ::: tip \u7f16\u7801\u5c31\u662f\u628a\u5b57\u7b26\u8f6c\u6362\u4e3a\u5b57\u8282\uff0c\u800c\u89e3\u7801\u662f\u628a\u5b57\u8282\u91cd\u65b0\u7ec4\u5408\u6210\u5b57\u7b26\u3002:::<\/p>\n
    \u901a\u5e38\u5462\uff0c\u6211\u4eec\u5bf9\u6587\u4ef6\u8fdb\u884c\u7f16\u7801\u548c\u89e3\u7801\u7684\u65f6\u5019\u4f7f\u7528\u7684\u662f\u540c\u4e00\u79cd\u683c\u5f0f\uff0c\u4e0d\u7136\u5c31\u4f1a\u51fa\u73b0\u4e71\u7801\uff0c\u6709\u65f6\u5019\u4f60\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u5462\u51fa\u73b0\u4e00\u5806\u770b\u4e0d\u61c2\u7684\u5b57\u7b26\uff0c\u5f88\u6709\u53ef\u80fd\u662f\u4f60\u7684\u5de5\u5177\u4f7f\u7528\u4e86\u9519\u8bef\u7684\u7f16\u7801\u683c\u5f0f\u3002<\/p>\n
    \u8ba4\u8bc6\u4e00\u4e0b\u5e38\u89c1\u7684\u7f16\u7801\u683c\u5f0f:<\/p>\n
      \n
    • \n
      \u300cGBK<\/span>\u300d<\/strong> \u7f16\u7801\u4e2d\uff0c\u4e2d\u6587\u5b57\u7b26\u5360 2 \u4e2a\u5b57\u8282\uff0c\u82f1\u6587\u5b57\u7b26\u5360 1 \u4e2a\u5b57\u8282\uff1b<\/section>\n<\/li>\n
    • \n
      \u300cUTF-8<\/span>\u300d<\/strong> \u7f16\u7801\u4e2d\uff0c\u4e2d\u6587\u5b57\u7b26\u5360 3 \u4e2a\u5b57\u8282\uff0c\u82f1\u6587\u5b57\u7b26\u5360 1 \u4e2a\u5b57\u8282\uff1b<\/section>\n<\/li>\n
    • \n
      \u300cUTF-16be<\/span>\u300d<\/strong> \u7f16\u7801\u4e2d\uff0c\u4e2d\u6587\u5b57\u7b26\u548c\u82f1\u6587\u5b57\u7b26\u90fd\u5360 2 \u4e2a\u5b57\u8282\u3002<\/section>\n<\/li>\n<\/ul>\n
      ::: tip char \u7c7b\u578b\u5360 16 \u4f4d\uff0c\u4e5f\u5c31\u662f\u4e24\u4e2a\u5b57\u8282\uff0cJava \u4f7f\u7528\u8fd9\u79cd\u53cc\u5b57\u8282\u7f16\u7801\u662f\u4e3a\u4e86\u8ba9\u4e00\u4e2a\u4e2d\u6587\u6216\u8005\u4e00\u4e2a\u82f1\u6587\u90fd\u80fd\u4f7f\u7528\u4e00\u4e2a char \u6765\u5b58\u50a8 :::<\/p>\n
      <\/span>public<\/span> static<\/span> void<\/span> stringCodec<\/span>()<\/span> throws<\/span> UnsupportedEncodingException <\/span>{
          String hello = \"Hello\"<\/span>;
          \/\/ \u7f16\u7801 UTF-8<\/span>
          byte<\/span>[] bytes = hello.getBytes(\"UTF-8\"<\/span>);

          \/\/ \u89e3\u7801 UTF-8<\/span>
          String hello1 = new<\/span> String(bytes, \"UTF-8\"<\/span>);
          Log.info(hello1); \/\/ Hello<\/span>
      }
      <\/code><\/pre>\n
      \u5728\u8c03\u7528\u65e0\u53c2\u6570  \u300cgetBytes()<\/span>\u300d<\/strong> \u65b9\u6cd5\u65f6\uff0c\u9ed8\u8ba4\u7684\u7f16\u7801\u65b9\u5f0f\u4e0d\u662f UTF-16be<\/span>\u3002\u53cc\u5b57\u8282\u7f16\u7801\u7684\u597d\u5904\u662f\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a  \u300cchar<\/span>\u300d<\/strong> \u5b58\u50a8\u4e2d\u6587\u548c\u82f1\u6587\uff0c\u800c\u5c06  \u300cString<\/span>\u300d<\/strong> \u8f6c\u4e3a  \u300cbytes[]<\/span>\u300d<\/strong> \u5b57\u8282\u6570\u7ec4\u5c31\u4e0d\u518d\u9700\u8981\u8fd9\u4e2a\u597d\u5904\uff0c\u56e0\u6b64\u4e5f\u5c31\u4e0d\u518d\u9700\u8981\u53cc\u5b57\u8282\u7f16\u7801\u3002 \u300cgetBytes()<\/span>\u300d<\/strong> \u7684\u9ed8\u8ba4\u7f16\u7801\u65b9\u5f0f\u4e0e\u5e73\u53f0\u6709\u5173\uff0c\u4e00\u822c\u4e3a UTF-8<\/span>\u3002<\/p>\n
      \u6587\u4ef6\u5185\u5bb9\u64cd\u4f5c InputStreamReader & OutputStreamWriter<\/span><\/h3>\n
      \u4e0d\u7ba1\u662f\u78c1\u76d8\u8fd8\u662f\u7f51\u7edc\u4f20\u8f93\uff0c\u6700\u5c0f\u7684\u5b58\u50a8\u5355\u5143\u90fd\u662f\u5b57\u8282\uff0c\u800c\u4e0d\u662f\u5b57\u7b26\u3002\u4f46\u662f\u5728\u7a0b\u5e8f\u4e2d\u64cd\u4f5c\u7684\u901a\u5e38\u662f\u5b57\u7b26\u5f62\u5f0f\u7684\u6570\u636e\uff0c\u56e0\u6b64\u9700\u8981\u63d0\u4f9b\u5bf9\u5b57\u7b26\u8fdb\u884c\u64cd\u4f5c\u7684\u65b9\u6cd5\u3002\u6d89\u53ca\u4e24\u4e2a\u7c7b:<\/p>\n
        \n
      • \n
        \n
        InputStreamReader \u5b9e\u73b0\u4ece\u5b57\u8282\u6d41\u89e3\u7801\u6210\u5b57\u7b26\u6d41\uff1b<\/p>\n<\/section>\n<\/li>\n
      • \n
        \n
        OutputStreamWriter \u5b9e\u73b0\u5b57\u7b26\u6d41\u7f16\u7801\u6210\u4e3a\u5b57\u8282\u6d41\u3002<\/p>\n<\/section>\n<\/li>\n<\/ul>\n
        \u6765\u770b\u4e00\u4e0b\u5b9e\u64cd\u4ee3\u7801\uff1a<\/p>\n
        <\/span> public<\/span> static<\/span> void<\/span> readContent<\/span>(String src)<\/span> throws<\/span> IOException <\/span>{
              FileReader reader = new<\/span> FileReader(src);
              \/\/ \u88c5\u9970\u5668\uff08\u7f13\u51b2\u533a\uff09<\/span>
              BufferedReader reader2 = new<\/span> BufferedReader(reader);

              String line;

              \/\/ \u9010\u884c\u8bfb\u53d6<\/span>
              while<\/span> ((line = reader2.readLine()) != null<\/span>) {
                  Log.info(line);
              }

              reader2.close();


              \/\/ writer\u5b9e\u73b0 \u5b57\u7b26\u8f6c\u4e3a\u5b57\u8282\u5199\u5165\u5230\u76ee\u6807\u6587\u4ef6<\/span>

              \/\/ \u521b\u5efa\u4e00\u4e2a\u8f93\u51fa\u6d41<\/span>
              FileOutputStream output = new<\/span> FileOutputStream(src);

              \/\/ \u521b\u5efa\u4e00\u4e2a\u5199\u5165\u6d41 -> \u5199\u5165\u5230\u8f93\u51fa\u6d41,\u76ee\u6807\u6587\u4ef6\u4e2d<\/span>
              OutputStreamWriter writer = new<\/span> OutputStreamWriter(output);

              \/\/ \u5199\u5165\u7684\u6570\u636e<\/span>
              String data = \"\u8fd9\u662f\u6211\u8ffd\u52a0\u7684\u6570\u636e\"<\/span>;

              \/\/ write\u4f1a\u5bfc\u81f4\u5168\u90e8\u91cd\u5199 (\u5982\u679c\u662f\u5199\u5165\u65b0\u6587\u4ef6\u53ef\u4ee5\u8fd9\u4e48\u5199)<\/span>
              writer.write(data);

              \/\/ \u5f3a\u5236\u5c06\u5199\u5165\u5668\u4e2d\u5b58\u5728\u7684\u6240\u6709\u6570\u636e\u5199\u5165\u76f8\u5e94\u7684\u76ee\u7684\u5730<\/span>
              \/\/ writer.flush();<\/span>

              \/\/ \u5c06\u6307\u5b9a\u5b57\u7b26\u63d2\u5165\u5f53\u524d\u7f16\u5199\u5668 \u5728\u5c3e\u90e8\u6dfb\u52a0<\/span>
              writer.append(\"n\"<\/span> + data);

              \/\/ \u5148\u5173\u95ed\u5199\u5165\u6d41<\/span>
              writer.close();

              \/\/ \u540e\u5173\u95ed\u8f93\u51fa\u6d41<\/span>
              output.close();
          }
        <\/code><\/pre>\n
        \u5bf9\u8c61\u64cd\u4f5c Serializable & Externalizable<\/span><\/h2>\n
        \u4e0b\u8fb9\u7684\u5185\u5bb9\u5c06\u4f1a\u9010\u6e10\u52a0\u6df1\uff0c\u6d89\u53ca\u7684\u77e5\u8bc6\u70b9\u4e5f\u662f\u6bd4\u8f83\u6838\u5fc3\u7684\uff0c\u8981\u8010\u5fc3\u770b\u5b8c\u54e6 ~<\/p>\n
        \u8bf4\u5230  \u300cSerializable<\/span>\u300d<\/strong> \uff0c\u6211\u4eec\u5de5\u4f5c\u4e2d\u7ecf\u5e38\u4f1a\u770b\u5230\u540c\u4e8b\u7684\u4ee3\u7801\uff0c\u5b9e\u4f53\u7c7b implements Serializable<\/code> \u52a0\u4e0a\u4e86\u8fd9\u4e48\u4e2a\u4e1c\u4e1c\uff0c \u7b2c\u4e00\u5370\u8c61\u80af\u5b9a\u8054\u60f3\u5230\u662f \u300c\u5bf9\u8c61\u5e8f\u5217\u5316<\/span>\u300d<\/strong> ,\u90a3\u4f60\u77e5\u9053\u4e3a\u4ec0\u4e48\u8981\u8fd9\u6837\u505a\u5417\uff1f<\/p>\n
        \u5e8f\u5217\u5316 & \u53cd\u5e8f\u5217\u5316<\/span><\/h3>\n
        \u5728\u8bb2\u89e3\u4e4b\u524d\uff0c\u6211\u4eec\u8fd8\u662f\u5148\u53bb\u7406\u89e3\u8fd9\u4e24\u4e2a\u6982\u5ff5\u6027\u7684\u4e1c\u897f~<\/p>\n
          \n
        • \n
          \u300c\u5e8f\u5217\u5316<\/span>\u300d<\/strong> \u5b57\u9762\u610f\u601d,\u5c06\u5bf9\u8c61\u5b58\u8f6c\u4e3a\u5b57\u8282\u5e8f\u5217<\/section>\n<\/li>\n
        • \n
          \u300c\u996d\u5e8f\u5217\u5316<\/span>\u300d<\/strong> \u5c06\u5b57\u8282\u5e8f\u5217\u8f6c\u4e3a\u539f\u6765\u7684\u6807\u51c6\u5bf9\u8c61<\/section>\n<\/li>\n<\/ul>\n
          \u4e3a\u4ec0\u4e48\u8981\u8fdb\u884c\u5bf9\u8c61\u5e8f\u5217\u5316\uff1f<\/p>\n
          \u5982\u679c\u4f60\u6709\u8fd9\u6837\u7684\u9700\u6c42\uff0c\u56e0\u4e3a\u7a0b\u5e8f\u4e00\u5173\u95ed\u6570\u636e\u5c31\u4f1a\u4ece\u5185\u5b58\u4e2d\u6d88\u5931, \u73b0\u5728\u9700\u8981\u628a\u5bf9\u8c61\u5b58\u50a8\u5230\u78c1\u76d8\u4e2d\uff0c\u90a3\u4f60\u5c31\u9700\u8981\u8fdb\u884c\u5e8f\u5217\u5316\u64cd\u4f5c\uff0c\u56e0\u4e3a\u6587\u4ef6\u64cd\u4f5c\u6d89\u53ca\u5230\u5b57\u8282\u64cd\u4f5c\u3002\u518d\u6216\u8005\u4f60\u8981\u628a\u5bf9\u8c61\u8fdb\u884c\u4f20\u8f93\u5230\u5176\u5b83\u7684\u5730\u65b9\u6267\u884c\uff0c\u901a\u5e38\u662f\u901a\u8fc7\u7f51\u7edc\u4f20\u8f93\uff0c\u8fd9\u4e5f\u5f15\u7533\u4e86\u4e00\u4e2a\u5c0f\u77e5\u8bc6\u70b9 \u300crpc<\/span>\u300d<\/strong> \u8fdc\u7a0b\u8c03\u7528\uff0c\u5982\u679c\u4f60\u505a\u8fc7\u5fae\u670d\u52a1\u80af\u5b9a\u4e5f\u4e0d\u964c\u751f\u4e86\uff0c\u8fd9\u91cc\u4e0d\u5c55\u5f00\u8bb2\u4e86\uff0c\u540e\u8fb9\u4f1a\u6709\u4e13\u95e8\u6587\u7ae0\u8bf4\u4e00\u4e0b\u8fd9\u4e2a\u5b9e\u73b0\u3002<\/p>\n
          \u5728Java\u4e2d\u5b9e\u73b0\u5e8f\u5217\u5316\u4e3b\u8981\u901a\u8fc7\u4e24\u4e2a\u63a5\u53e3:<\/p>\n
            \n
          • \n
            Serializable \u63a5\u53e3<\/section>\n<\/li>\n
          • \n
            Externalizable \u63a5\u53e3<\/section>\n<\/li>\n<\/ul>\n
            Serializable<\/span><\/h3>\n
            \u4e00\u4e2a\u5bf9\u8c61\u60f3\u8981\u88ab\u5e8f\u5217\u5316\uff0c\u90a3\u4e48\u5b83\u7684\u7c7b\u5c31\u8981\u5b9e\u73b0\u6b64\u63a5\u53e3\u6216\u8005\u5b83\u7684\u5b50\u63a5\u53e3\u3002\u8fd9\u4e2a\u5bf9\u8c61\u7684\u6240\u6709\u5c5e\u6027\uff08\u5305\u62ecprivate\u5c5e\u6027\u3001\u5305\u62ec\u5176\u5f15\u7528\u7684\u5bf9\u8c61\uff09\u90fd\u53ef\u4ee5\u88ab\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u6765\u4fdd\u5b58\u3001\u4f20\u9012\u3002\u4e0d\u60f3\u5e8f\u5217\u5316\u7684\u5b57\u6bb5\u53ef\u4ee5\u4f7f\u7528transient\u4fee\u9970\u3002\u7531\u4e8eSerializable\u5bf9\u8c61\u5b8c\u5168\u4ee5\u5b83\u5b58\u50a8\u7684\u4e8c\u8fdb\u5236\u4f4d\u4e3a\u57fa\u7840\u6765\u6784\u9020\uff0c\u56e0\u6b64\u5e76\u4e0d\u4f1a\u8c03\u7528\u4efb\u4f55\u6784\u9020\u51fd\u6570\uff0c\u56e0\u6b64Serializable\u7c7b\u65e0\u9700\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\uff0c\u4f46\u662f\u5f53Serializable\u7c7b\u7684\u7236\u7c7b\u6ca1\u6709\u5b9e\u73b0Serializable\u63a5\u53e3\u65f6\uff0c\u53cd\u5e8f\u5217\u5316\u8fc7\u7a0b\u4f1a\u8c03\u7528\u7236\u7c7b\u7684\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\uff0c\u56e0\u6b64\u8be5\u7236\u7c7b\u5fc5\u9700\u6709\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\uff0c\u5426\u5219\u4f1a\u629b\u5f02\u5e38\u3002\u4f7f\u7528transient\u5173\u952e\u5b57\u963b\u6b62\u5e8f\u5217\u5316\u867d\u7136\u7b80\u5355\u65b9\u4fbf\uff0c\u4f46\u88ab\u5b83\u4fee\u9970\u7684\u5c5e\u6027\u88ab\u5b8c\u5168\u9694\u79bb\u5728\u5e8f\u5217\u5316\u673a\u5236\u4e4b\u5916\uff0c\u5bfc\u81f4\u4e86\u5728\u53cd\u5e8f\u5217\u5316\u65f6\u65e0\u6cd5\u83b7\u53d6\u8be5\u5c5e\u6027\u7684\u503c\uff0c\u800c\u901a\u8fc7\u5728\u9700\u8981\u5e8f\u5217\u5316\u7684\u5bf9\u8c61\u7684Java\u7c7b\u91cc\u52a0\u5165writeObject()\u65b9\u6cd5\u4e0ereadObject()\u65b9\u6cd5\u53ef\u4ee5\u63a7\u5236\u5982\u4f55\u5e8f\u5217\u5316\u5404\u5c5e\u6027\uff0c\u751a\u81f3\u5b8c\u5168\u4e0d\u5e8f\u5217\u5316\u67d0\u4e9b\u5c5e\u6027\u6216\u8005\u52a0\u5bc6\u5e8f\u5217\u5316\u67d0\u4e9b\u5c5e\u6027\u3002<\/p>\n
            Externalizable<\/span><\/h3>\n
            \u5b83\u662fSerializable\u63a5\u53e3\u7684\u5b50\u7c7b\uff0c\u7528\u6237\u8981\u5b9e\u73b0\u7684writeExternal()\u548creadExternal() \u65b9\u6cd5\uff0c\u7528\u6765\u51b3\u5b9a\u5982\u4f55\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u3002\u56e0\u4e3a\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u65b9\u6cd5\u9700\u8981\u81ea\u5df1\u5b9e\u73b0\uff0c\u56e0\u6b64\u53ef\u4ee5\u6307\u5b9a\u5e8f\u5217\u5316\u54ea\u4e9b\u5c5e\u6027\uff0c\u800ctransient\u5728\u8fd9\u91cc\u65e0\u6548\u3002\u5bf9Externalizable\u5bf9\u8c61\u53cd\u5e8f\u5217\u5316\u65f6\uff0c\u4f1a\u5148\u8c03\u7528\u7c7b\u7684\u65e0\u53c2\u6784\u9020\u65b9\u6cd5\uff0c\u8fd9\u662f\u6709\u522b\u4e8e\u9ed8\u8ba4\u53cd\u5e8f\u5217\u65b9\u5f0f\u7684\u3002\u5982\u679c\u628a\u7c7b\u7684\u4e0d\u5e26\u53c2\u6570\u7684\u6784\u9020\u65b9\u6cd5\u5220\u9664\uff0c\u6216\u8005\u628a\u8be5\u6784\u9020\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\u8bbe\u7f6e\u4e3aprivate\u3001\u9ed8\u8ba4\u6216protected\u7ea7\u522b\uff0c\u4f1a\u629b\u51fajava.io.InvalidException: no valid constructor\u5f02\u5e38\uff0c\u56e0\u6b64Externalizable\u5bf9\u8c61\u5fc5\u987b\u6709\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\uff0c\u800c\u4e14\u5fc5\u9700\u662fpublic\u7684\u3002<\/p>\n
            \u52a8\u624b\u5b9e\u73b0<\/span><\/h3>\n
            \u597d\uff0c\u6709\u4e86\u4ee5\u4e0a\u57fa\u7840\u77e5\u8bc6\u7684\u94fa\u57ab\uff0c\u4e0b\u9762\u6211\u4eec\u901a\u8fc7\u4f8b\u5b50\u6765\u76f4\u89c2\u611f\u53d7\u4e00\u4e0b:<\/p>\n
            \u5148\u5b9a\u4e49\u4e00\u4e2a\u7c7b\uff1a<\/p>\n
            <\/span>class<\/span> Apple<\/span> implements<\/span> Serializable<\/span> <\/span>{
                \/**
                 * serialVersionUID \u662f\u5b9e\u73b0 Serializable \u63a5\u53e3\u800c\u6765\u7684\uff0c\u800c Serializable \u5219\u662f\u5e94\u7528\u4e8eJava \u5bf9\u8c61\u5e8f\u5217\u5316\/\u53cd\u5e8f\u5217\u5316\u3002
                 * \u5bf9\u8c61\u7684\u5e8f\u5217\u5316\u4e3b\u8981\u6709\u4e24\u79cd\u7528\u9014:
                 *
                 * 1. \u628a\u5bf9\u8c61\u5e8f\u5217\u5316\u6210\u5b57\u8282\u7801\uff0c\u4fdd\u5b58\u5230\u6307\u5b9a\u4ecb\u8d28\u4e0a(\u5982\u78c1\u76d8\u7b49)
                 * 2. \u7528\u4e8e\u7f51\u7edc\u4f20\u8f93
                 *
                 *
                 * serialVersionUID \u662f Java \u4e3a\u6bcf\u4e2a\u5e8f\u5217\u5316\u7c7b\u4ea7\u751f\u7684\u7248\u672c\u6807\u8bc6\uff0c\u53ef\u7528\u6765\u4fdd\u8bc1\u5728\u53cd\u5e8f\u5217\u65f6\uff0c\u53d1\u9001\u65b9\u53d1\u9001\u7684\u548c\u63a5\u53d7\u65b9\u63a5\u6536\u7684\u662f\u53ef\u517c\u5bb9\u7684\u5bf9\u8c61\u3002
                 * \u5982\u679c\u63a5\u6536\u65b9\u63a5\u6536\u7684\u7c7b\u7684 serialVersionUID \u4e0e\u53d1\u9001\u65b9\u53d1\u9001\u7684 serialVersionUID \u4e0d\u4e00\u81f4\uff0c\u8fdb\u884c\u53cd\u5e8f\u5217\u65f6\u4f1a\u629b\u51fa InvalidClassException
                 *
                 *\/<\/span>
                private<\/span> static<\/span> final<\/span> long<\/span> serialVersionUID = 1L<\/span>;
                private<\/span> int<\/span> x;
                private<\/span> String y;
                transient<\/span> String z;

                Apple(int<\/span> x, String y) {
                    this<\/span>.x = x;
                    this<\/span>.y = y;
                    this<\/span>.z = \"z\"<\/span>;
                }

                @Override<\/span>
                public<\/span> String toString<\/span>()<\/span> <\/span>{
                    return<\/span> \"x = \"<\/span> + x + \"  \"<\/span> + \"y = \"<\/span> + y + \"  \"<\/span> +z;
                }
            }

            <\/code><\/pre>\n
            \u901a\u8fc7\u4ee3\u7801\u53ef\u4ee5\u770b\u5230 \u300ctransient<\/span>\u300d<\/strong> \u4fee\u9970\u7684\u4e00\u4e2a\u5c5e\u6027, \u90a3\u4e48\u5b83\u6709\u4ec0\u4e48\u4f5c\u7528\u5462\uff1f\u6211\u4eec\u901a\u8fc7\u4ee3\u7801\u6765\u9a8c\u8bc1\u4e00\u4e0b\uff1a<\/p>\n
            <\/span> public<\/span> static<\/span> void<\/span> objSerializable<\/span>()<\/span> throws<\/span> IOException, ClassNotFoundException <\/span>{
                    String objFile = \"test\/apple.txt\"<\/span>;
                    Apple apple = new<\/span> Apple(1<\/span>, \"apple\"<\/span>);

                    \/**
                     * \u5e8f\u5217\u5316:
                     *   1. \u521b\u5efa\u51fa\u8f93\u51fa\u6d41\uff0c\u5373\u76ee\u6807\u5bf9\u8c61\uff0c\u6bd4\u5982\u78c1\u76d8
                     *   2. \u521b\u5efa\u5bf9\u8c61\u8f93\u51fa\u6d41
                     *   3. \u5199\u5165\u5bf9\u8c61
                     *   4. \u5173\u95ed\u5bf9\u8c61\u8f93\u51fa\u6d41
                     *\/<\/span>
                    FileOutputStream fileOutputStream = new<\/span> FileOutputStream(objFile);
                    ObjectOutputStream objectOutputStream = new<\/span> ObjectOutputStream(fileOutputStream);
                    objectOutputStream.writeObject(apple);
                    objectOutputStream.close();

                    \/\/ \u53d1\u73b0apple.txt\u6587\u4ef6\u6253\u5f00\u540e\u662f\u4e71\u7801\uff0c\u56e0\u4e3a\u88ab\u5e8f\u5217\u5316\u4e86\uff0c\u5bf9\u4e8e\u654f\u611f\u4fe1\u606f\u7684\u5bf9\u8c61\u53ef\u4ee5\u4f7f\u7528\u5e8f\u5217\u5316\u64cd\u4f5c<\/span>

                    \/**
                     *  \u53cd\u5e8f\u5217\u5316
                     *  \u4e0e\u5e8f\u5217\u5316\u76f8\u53cd:
                     *    1. \u521b\u5efa\u8f93\u5165\u6d41
                     *    2. \u521b\u5efa\u5bf9\u8c61\u8f93\u5165\u6d41
                     *    3. \u8bfb\u53d6\u5bf9\u8c61
                     *    4. \u5173\u95ed\u5bf9\u8c61\u8f93\u5165\u6d41
                     *\/<\/span>

                    FileInputStream fileInputStream = new<\/span> FileInputStream(objFile);
                    ObjectInputStream objectInputStream = new<\/span> ObjectInputStream(fileInputStream);
                    \/\/ \u8bfb\u53d6\u5bf9\u8c61<\/span>
                    Apple appleRead = (Apple) objectInputStream.readObject();
                    objectInputStream.close();
                    Log.info(appleRead); \/\/ x = 1  y = apple null \u8fd9\u91cc\u6253\u5370\u7684\u662f  Apple.toString() \u65b9\u6cd5<\/span>

                    \/\/ \u53d1\u73b0 transient \u4fee\u9970\u7684z \u5e76\u6ca1\u6709\u88ab\u5e8f\u5217\u5316 \uff0c\u6240\u4ee5\u662fnull<\/span>
                }
            }
            <\/code><\/pre>\n
            \u7ed3\u679c\u5df2\u7ecf\u5728\u6ce8\u91ca\u4e2d\u6807\u8bb0\u4e86~ \u53e6\u5916\u9700\u8981\u63d0\u9192\u5927\u5bb6\u7684\u662f\uff1a \u300c\u5e8f\u5217\u5316\u4e0d\u4f1a\u5bf9\u9759\u6001\u53d8\u91cf\u8fdb\u884c\u5e8f\u5217\u5316\uff0c\u56e0\u4e3a\u5e8f\u5217\u5316\u53ea\u662f\u4fdd\u5b58\u5bf9\u8c61\u7684\u72b6\u6001\uff0c\u9759\u6001\u53d8\u91cf\u5c5e\u4e8e\u7c7b\u7684\u72b6\u6001<\/span>\u300d<\/strong><\/p>\n
            \u6211\u4eec\u4e4b\u524d\u5b66\u4e60\u7684\u96c6\u5408 ArrayList<\/code> \u5e95\u5c42\u6570\u636e\u7ed3\u6784\u4e2d\u7684\u6570\u7ec4 elementData\u53d8\u91cf\u8fd8\u8bb0\u5f97\u662f\u4ec0\u4e48\u4fee\u9970\u7684\u5417\uff1f\u6ca1\u9519\uff0c\u5c31\u662f \u300ctransient<\/span>\u300d<\/strong>, \u8fd9\u4e48\u505a\u4e3b\u8981\u662f\u56e0\u4e3a\u8fd9\u4e2a\u6570\u7ec4\u662f\u52a8\u6001\u6269\u5c55\u7684\uff0c\u5e76\u4e0d\u662f\u6240\u6709\u7684\u7a7a\u95f4\u90fd\u88ab\u4f7f\u7528\uff0c\u56e0\u6b64\u5c31\u4e0d\u9700\u8981\u6240\u6709\u7684\u5185\u5bb9\u90fd\u88ab\u5e8f\u5217\u5316\u3002\u901a\u8fc7\u91cd\u5199\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u65b9\u6cd5\uff0c\u4f7f\u5f97\u53ef\u4ee5\u53ea\u5e8f\u5217\u5316\u6570\u7ec4\u4e2d\u6709\u5185\u5bb9\u7684\u90a3\u90e8\u5206\u6570\u636e<\/p>\n
            <\/span>private<\/span> transient<\/span> Object[] elementData;
            <\/code><\/pre>\n
            \u7f51\u7edc\u64cd\u4f5c<\/span><\/h2>\n
            \u4e0a\u8fb9\u7684\u5185\u5bb9\u90fd\u8fd8\u6ca1\u6709\u6d89\u53ca\u5230\u7f51\u7edc\u64cd\u4f5c\uff0c\u4f46\u662f\u6211\u4eec\u7684\u65e5\u5e38\u64cd\u4f5c\u90fd\u662f\u5728\u548c\u7f51\u7edc\u6253\u4ea4\u9053\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u5f00\u59cb\u5b66\u4e60\u4e00\u4e0b\u7f51\u7edc\u76f8\u5173\u7684IO\u64cd\u4f5c,\u5728Java\u4e2d\u7684\u652f\u6301\u4e3b\u8981\u6709\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762:<\/p>\n
              \n
            • \n
              InetAddress \u7528\u4e8e\u8868\u793a\u7f51\u7edc\u4e0a\u7684\u786c\u4ef6\u8d44\u6e90\uff0c\u5373 IP \u5730\u5740<\/section>\n<\/li>\n
            • \n
              URL \u7edf\u4e00\u8d44\u6e90\u5b9a\u4f4d\u7b26<\/section>\n<\/li>\n
            • \n
              Socket \u4f7f\u7528 TCP \u534f\u8bae\u5b9e\u73b0\u7f51\u7edc\u901a\u4fe1<\/section>\n<\/li>\n
            • \n
              Datagram \u4f7f\u7528 UDP \u534f\u8bae\u5b9e\u73b0\u7f51\u7edc\u901a\u4fe1;<\/section>\n<\/li>\n<\/ul>\n
              InetAddress<\/span><\/h3>\n
              \u8fd9\u4e2a\u7c7b\u6ca1\u6709\u516c\u6709\u7684\u6784\u9020\u51fd\u6570\uff0c\u53ea\u80fd\u901a\u8fc7\u9759\u6001\u65b9\u6cd5\u6765\u521b\u5efa\u5b9e\u4f8b\u3002<\/p>\n
              <\/span> public<\/span> static<\/span> void<\/span> ipAddress<\/span>()<\/span> throws<\/span> UnknownHostException <\/span>{
                    InetAddress netAddress = InetAddress.getByName(\"www.baidu.com\"<\/span>);

                    Log.info(netAddress); \/\/ www.baidu.com\/180.101.49.11<\/span>

                    \/\/ \u83b7\u53d6ip\u5730\u5740 - \u5148\u4ece\u672c\u5730\u7f13\u5b58\u83b7\u53d6\uff0c \u6ca1\u6709\u8d70dns\u670d\u52a1\u5668<\/span>
                    Log.info(\"ipv4: \"<\/span> + netAddress.getHostAddress()); \/\/ ipv4: 180.101.49.11<\/span>

                    InetAddress ipAddress = InetAddress.getByName(\"xx.xxx.xxx.xxx\"<\/span>);
                    Log.info(ipAddress); \/\/ \/xx.xxx.xxx.xxx<\/span>
              }
              <\/code><\/pre>\n
              URL\u5b9e\u73b0\u4e0b\u8f7d<\/span><\/h3>\n
              \u8fd9\u4e2a\u4e5f\u662f\u6211\u4eec\u65e5\u5e38\u4f7f\u7528\u9891\u7387\u6bd4\u8f83\u9ad8\u7684\u7c7b\uff0c\u90a3\u4e48\u5b83\u7684\u4f5c\u7528\u662f\u5565\u5462\uff1f\u5b83\u53ef\u4ee5\u76f4\u63a5\u4ece URL \u4e2d\u8bfb\u53d6\u5b57\u8282\u6d41\u6570\u636e,\u901a\u5e38\u662f\u4e00\u4e2a\u7f51\u7edc\u901a\u9053\u5730\u5740, \u4e0b\u9762\u6211\u4eec\u6765\u7ed3\u5408\u4e4b\u524d\u5b66\u4e60\u7684\u77e5\u8bc6\u52a8\u624b\u5b9e\u73b0\u4e00\u4e2a\u4e0b\u8f7d\u529f\u80fd<\/p>\n
              <\/span>
                \/**
                  * URL
                  * \u53ef\u4ee5\u76f4\u63a5\u4ece URL \u4e2d\u8bfb\u53d6\u5b57\u8282\u6d41\u6570\u636e\u3002
                  *\/<\/span>
                public<\/span> static<\/span> void<\/span> readByteByUrl<\/span>()<\/span> throws<\/span> IOException <\/span>{
                    \/\/ \u521b\u5efaurl\u8bfb\u53d6\u5bf9\u8c61 \u6ce8\u610f\u8981\u52a0\u534f\u8bae\u5934<\/span>
                    URL url = new<\/span> URL(\"https:\/\/www.baidu.com\"<\/span>);

                    \/\/ \u521b\u5efa\u8f93\u5165\u6d41 - \u5b57\u8282<\/span>
                    InputStream inputStream  = url.openStream();

                    \/\/ \u521b\u5efa\u8bfb\u53d6\u6d41 - \u5b57\u7b26<\/span>
                    InputStreamReader reader = new<\/span> InputStreamReader(inputStream, \"UTF-8\"<\/span>);
                    \/\/ \u521b\u5efa\u7f13\u51b2\u533a\u8bfb\u53d6\u5bf9\u8c61<\/span>
                    BufferedReader readerReader = new<\/span> BufferedReader(reader);

                    String line;
                    \/\/ \u5199\u5165\u6587\u4ef6<\/span>
                    FileOutputStream fileOutputStream = new<\/span> FileOutputStream(\"test\/baidu.html\"<\/span>);
                    OutputStreamWriter writer = new<\/span> OutputStreamWriter(fileOutputStream);

                    while<\/span> ((line = readerReader.readLine()) != null<\/span>) {
                        Log.info(line);
                        writer.write(line);
                    }

                    \/\/ \u5173\u95ed\u5199\u5165\u6d41<\/span>
                    writer.close();

                    \/\/ \u5173\u95ed\u8bfb\u53d6\u6d41<\/span>
                    readerReader.close();


                    \/**
                      * \u4e0b\u8f7d\u56fe\u7247:
                      *  1. \u901a\u8fc7 \u7f51\u7edc\u5730\u5740\u83b7\u53d6\u7f51\u7edc\u8d44\u6e90\u7684\u5b57\u8282\u6d41
                      *  2. \u5199\u5165\u6587\u4ef6 - \u521b\u5efa\u6587\u4ef6\u8f93\u51fa\u6d41
                      *  3. \u901a\u8fc7 url\u6253\u5f00\u8f93\u5165\u6d41\u901a\u9053 imgUrl.openStream()
                      *  4. \u521b\u5efabuffer\u7f13\u51b2\u533a\uff0c \u5c06\u5b57\u8282\u5199\u5165buffer,
                      *  5. \u6700\u540e\u901a\u8fc7buffer\u7f13\u51b2\u533a\u5c06\u5185\u5bb9\u5199\u5165\u76ee\u6807\u8f93\u51fa\u6d41
                      *  6. \u5173\u95ed\u8f93\u51fa\u6d41\u901a\u9053
                      *\/<\/span>
                    URL imgUrl = new<\/span> URL(\"https:\/\/t7.baidu.com\/it\/u=4162611394,4275913936&fm=193&f=GIF\"<\/span>);
                    InputStream imgInputStream = new<\/span> BufferedInputStream(imgUrl.openStream());
                    FileOutputStream imgStream = new<\/span> FileOutputStream(\"test\/dog.jpg\"<\/span>);

                    byte<\/span>[] buffer = new<\/span> byte<\/span>[1024<\/span> * 2<\/span>];
                    int<\/span> cnt;

                    while<\/span> ((cnt = imgInputStream.read(buffer, 0<\/span> , buffer.length)) != -1<\/span>) {
                        imgStream.write(buffer, 0<\/span>, cnt);
                    }

                    writer.close();
                    Log.info(\"\u6587\u4ef6\u4e0b\u8f7d\u6210\u529f\"<\/span>);
                }

              <\/code><\/pre>\n
              \u662f\u4e0d\u662f\u53d1\u73b0\u4e4b\u524d\u5b66\u4e60\u7684\u77e5\u8bc6\u70b9\u90fd\u662f\u4e32\u5728\u4e00\u8d77\u7684\uff0c\u6240\u4ee5\u5e73\u65f6\u5de5\u4f5c\u4e5f\u662f\u4e00\u6837\u7684\uff0c\u53ef\u80fd\u4e00\u4e2a\u4e0d\u8d77\u773c\u7684\u529f\u80fd\u6216\u8bb8\u5c31\u662f\u4f60\u5b9e\u73b0\u590d\u6742\u529f\u80fd\u7684\u5c0f\u5173\u952e\u70b9\uff0c\u6240\u4ee5\u8981\u591a\u53bb\u505a\u603b\u7ed3<\/p>\n
              socket<\/span><\/h3>\n
              \u542c\u5230 socket<\/span>\uff0c\u5927\u5bb6\u90fd\u4e0d\u964c\u751f\uff0c\u4f46\u662f\u5230\u5e95\u5565\u662f socket<\/code>\u5462\uff1f\u6211\u4eec\u5e73\u65f6\u65e5\u5e38\u5f00\u53d1\u5927\u90e8\u5206\u90fd\u662f\u5904\u7406 \u300chttp<\/span>\u300d<\/strong> \u8bf7\u6c42,\u8fd9\u90fd\u662f\u5e94\u7528\u5c42\u7684\u3002\u5148\u770b\u767e\u5ea6\u767e\u79d1\u662f\u600e\u4e48\u63cf\u8ff0\u7684<\/p>\n
              ::: tip \u6240\u8c13\u5957\u63a5\u5b57(Socket)\uff0c\u5c31\u662f\u5bf9\u7f51\u7edc\u4e2d\u4e0d\u540c\u4e3b\u673a\u4e0a\u7684\u5e94\u7528\u8fdb\u7a0b\u4e4b\u95f4\u8fdb\u884c\u53cc\u5411\u901a\u4fe1\u7684\u7aef\u70b9\u7684\u62bd\u8c61\u3002\u4e00\u4e2a\u5957\u63a5\u5b57\u5c31\u662f\u7f51\u7edc\u4e0a\u8fdb\u7a0b\u901a\u4fe1\u7684\u4e00\u7aef\uff0c\u63d0\u4f9b\u4e86\u5e94\u7528\u5c42\u8fdb\u7a0b\u5229\u7528\u7f51\u7edc\u534f\u8bae\u4ea4\u6362\u6570\u636e\u7684\u673a\u5236\u3002\u4ece\u6240\u5904\u7684\u5730\u4f4d\u6765\u8bb2\uff0c\u5957\u63a5\u5b57\u4e0a\u8054\u5e94\u7528\u8fdb\u7a0b\uff0c\u4e0b\u8054\u7f51\u7edc\u534f\u8bae\u6808\uff0c\u662f\u5e94\u7528\u7a0b\u5e8f\u901a\u8fc7\u7f51\u7edc\u534f\u8bae\u8fdb\u884c\u901a\u4fe1\u7684\u63a5\u53e3\uff0c\u662f\u5e94\u7528\u7a0b\u5e8f\u4e0e\u7f51\u7edc\u534f\u8bae\u6808\u8fdb\u884c\u4ea4\u4e92\u7684\u63a5\u53e3 :::<\/p>\n
              \u597d\u4e86\uff0c\u6211\u4eec\u77e5\u9053\u4e86\u5e73\u65f6\u6240\u8bf4\u7684\u5957\u63a5\u5b57\u5c31\u662f\u6211\u4eec\u7684 socket<\/span>\uff0c\u8fd8\u8bb0\u5f97\u7f51\u7edc\u4e03\u5c42\u6a21\u578b\u662f\u54ea\u4e03\u4e2a\u5417\uff1f\u4ece\u4e0b\u5f80\u4e0a\uff1a<\/p>\n
              ::: tip \u7269\u7406\u5c42\uff08\u786c\u4ef6\uff09 -> \u6570\u636e\u94fe\u8def\u5c42(\u7f51\u5361) -> \u7f51\u7edc\u5c42(ip) -> \u4f20\u8f93\u5c42 (tcp\/udp ...) -> \u4f1a\u8bdd\u5c42 -> \u8868\u793a\u5c42 -> \u5e94\u7528\u5c42 :::<\/p>\n
              \u5176\u4e2d \u300csocket<\/span>\u300d<\/strong> \u5c5e\u4e8e\u4f20\u8f93\u5c42(\u57fa\u4e8etcp\/ip)\uff0c\u597d\u4e86\u6709\u591a\u4e86\u4e00\u4e2a\u6982\u5ff5\uff0c\u5565\u662ftcp?<\/p>\n
              TCP<\/h4>\n
              \u662f\u4e00\u79cd\u9762\u5411\u8fde\u63a5\u7684\u3001\u53ef\u9760\u7684\u3001\u57fa\u4e8e\u5b57\u8282\u6d41\u7684\u4f20\u8f93\u5c42\u901a\u4fe1\u534f\u8bae\uff0cTCP \u5c42\u662f\u4f4d\u4e8e IP \u5c42\u4e4b\u4e0a\uff0c\u5e94\u7528\u5c42\u4e4b\u4e0b\u7684\u4e2d\u95f4\u5c42\u3002TCP\u4fdd\u969c\u4e86\u4e24\u4e2a\u5e94\u7528\u7a0b\u5e8f\u4e4b\u95f4\u7684\u53ef\u9760\u901a\u4fe1\u3002\u901a\u5e38\u7528\u4e8e\u4e92\u8054\u7f51\u534f\u8bae\uff0c\u88ab\u79f0 TCP \/ IP\u3002<\/p>\n
              socket\u662f\u57fa\u4e8e\u5e94\u7528\u670d\u52a1\u4e0eTCP\/IP\u901a\u4fe1\u4e4b\u95f4\u7684\u4e00\u4e2a\u62bd\u8c61\uff0c\u4ed6\u5c06TCP\/IP\u534f\u8bae\u91cc\u9762\u590d\u6742\u7684\u901a\u4fe1\u903b\u8f91\u8fdb\u884c\u5206\u88c5\uff0c\u5bf9\u7528\u6237\u6765\u8bf4\uff0c\u53ea\u8981\u901a\u8fc7\u4e00\u7ec4\u7b80\u5355\u7684API\u5c31\u53ef\u4ee5\u5b9e\u73b0\u7f51\u7edc\u7684\u8fde\u63a5\u3002<\/p>\n
              UDP<\/h4>\n
              \u65e2\u7136tcp<\/code>\u662f\u53ef\u9760\u7684\u94fe\u63a5\uff0c\u90a3\u4e48\u6709\u4e0d\u53ef\u9760\u7684\u5417\uff1f\u6709<\/p>\n
              \u5176\u4e2dUDP\u662f\u4e00\u79cd\u9762\u5411\u65e0\u8fde\u63a5\u7684\u4f20\u8f93\u5c42\u534f\u8bae\u3002UDP\u4e0d\u5173\u5fc3\u5bf9\u7aef\u662f\u5426\u771f\u6b63\u6536\u5230\u4e86\u4f20\u9001\u8fc7\u53bb\u7684\u6570\u636e\u3002\u5982\u679c\u9700\u8981\u68c0\u67e5\u5bf9\u7aef\u662f\u5426\u6536\u5230\u5206\u7ec4\u6570\u636e\u5305\uff0c\u6216\u8005\u5bf9\u7aef\u662f\u5426\u8fde\u63a5\u5230\u7f51\u7edc\uff0c\u5219\u9700\u8981\u5728\u5e94\u7528\u7a0b\u5e8f\u4e2d\u5b9e\u73b0\u3002UDP\u5e38\u7528\u5728\u5206\u7ec4\u6570\u636e\u8f83\u5c11\u6216\u591a\u64ad\u3001\u5e7f\u64ad\u901a\u4fe1\u4ee5\u53ca\u89c6\u9891\u901a\u4fe1\u7b49\u591a\u5a92\u4f53\u9886\u57df\u3002<\/p>\n
              socket \u7f16\u7a0b\u5b9e\u73b0<\/span><\/h3>\n
              \u5957\u63a5\u5b57\u4f7f\u7528TCP<\/code>\u63d0\u4f9b\u4e86\u4e24\u53f0\u8ba1\u7b97\u673a\u4e4b\u95f4\u7684\u901a\u4fe1\u673a\u5236\u3002\u5ba2\u6237\u7aef\u7a0b\u5e8f\u521b\u5efa\u4e00\u4e2a\u5957\u63a5\u5b57\uff0c\u5e76\u5c1d\u8bd5\u8fde\u63a5\u670d\u52a1\u5668\u7684\u5957\u63a5\u5b57\u3002\u5f53\u8fde\u63a5\u5efa\u7acb\u65f6\uff0c\u670d\u52a1\u5668\u4f1a\u521b\u5efa\u4e00\u4e2a Socket \u5bf9\u8c61\u3002\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u73b0\u5728\u53ef\u4ee5\u901a\u8fc7\u5bf9 Socket \u5bf9\u8c61\u7684\u5199\u5165\u548c\u8bfb\u53d6\u6765\u8fdb\u884c\u901a\u4fe1\u3002<\/p>\n
              java.net.Socket<\/code> \u7c7b\u4ee3\u8868\u4e00\u4e2a\u5957\u63a5\u5b57\uff0c\u5e76\u4e14 java.net.ServerSocket<\/code> \u7c7b\u4e3a\u670d\u52a1\u5668\u7a0b\u5e8f\u63d0\u4f9b\u4e86\u4e00\u79cd\u6765\u76d1\u542c\u5ba2\u6237\u7aef\uff0c\u5e76\u4e0e\u4ed6\u4eec\u5efa\u7acb\u8fde\u63a5\u7684\u673a\u5236\u3002\u5b9e\u73b0\u6b65\u9aa4\uff1a<\/p>\n
                \n
              • \n
                \n
                \u670d\u52a1\u5668\u5b9e\u4f8b\u5316\u4e00\u4e2a ServerSocket<\/code> \u5bf9\u8c61\uff0c\u8868\u793a\u901a\u8fc7\u670d\u52a1\u5668\u4e0a\u7684\u7aef\u53e3\u901a\u4fe1<\/p>\n<\/section>\n<\/li>\n
              • \n
                \n
                \u670d\u52a1\u5668\u8c03\u7528 ServerSocket<\/code> \u7c7b\u7684 accept()<\/code> \u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u5c06\u4e00\u76f4\u7b49\u5f85\uff0c\u76f4\u5230\u5ba2\u6237\u7aef\u8fde\u63a5\u5230\u670d\u52a1\u5668\u4e0a\u7ed9\u5b9a\u7684\u7aef\u53e3<\/p>\n<\/section>\n<\/li>\n
              • \n
                \n
                \u670d\u52a1\u5668\u6b63\u5728\u7b49\u5f85\u65f6\uff0c\u4e00\u4e2a\u5ba2\u6237\u7aef\u5b9e\u4f8b\u5316\u4e00\u4e2a Socket<\/code> \u5bf9\u8c61\uff0c\u6307\u5b9a\u670d\u52a1\u5668\u540d\u79f0\u548c\u7aef\u53e3\u53f7\u6765\u8bf7\u6c42\u8fde\u63a5<\/p>\n<\/section>\n<\/li>\n
              • \n
                \n
                Socket \u7c7b\u7684\u6784\u9020\u51fd\u6570\u8bd5\u56fe\u5c06\u5ba2\u6237\u7aef\u8fde\u63a5\u5230\u6307\u5b9a\u7684\u670d\u52a1\u5668\u548c\u7aef\u53e3\u53f7\u3002\u5982\u679c\u901a\u4fe1\u88ab\u5efa\u7acb\uff0c\u5219\u5728\u5ba2\u6237\u7aef\u521b\u5efa\u4e00\u4e2a Socket<\/code> \u5bf9\u8c61\u80fd\u591f\u4e0e\u670d\u52a1\u5668\u8fdb\u884c\u901a\u4fe1<\/p>\n<\/section>\n<\/li>\n
              • \n
                \n
                \u5728\u670d\u52a1\u5668\u7aef\uff0caccept()<\/code> \u65b9\u6cd5\u8fd4\u56de\u670d\u52a1\u5668\u4e0a\u4e00\u4e2a\u65b0\u7684 socket<\/code> \u5f15\u7528\uff0c\u8be5 socket<\/code> \u8fde\u63a5\u5230\u5ba2\u6237\u7aef\u7684 socket<\/code><\/p>\n<\/section>\n<\/li>\n<\/ul>\n
                \u8fde\u63a5\u5efa\u7acb\u540e\uff0c\u901a\u8fc7\u4f7f\u7528 I\/O<\/code> \u6d41\u5728\u8fdb\u884c\u901a\u4fe1\uff0c\u6bcf\u4e00\u4e2asocket\u90fd\u6709\u4e00\u4e2a\u8f93\u51fa\u6d41\u548c\u4e00\u4e2a\u8f93\u5165\u6d41\uff0c\u5ba2\u6237\u7aef\u7684\u8f93\u51fa\u6d41\u8fde\u63a5\u5230\u670d\u52a1\u5668\u7aef\u7684\u8f93\u5165\u6d41\uff0c\u800c\u5ba2\u6237\u7aef\u7684\u8f93\u5165\u6d41\u8fde\u63a5\u5230\u670d\u52a1\u5668\u7aef\u7684\u8f93\u51fa\u6d41\u3002<\/p>\n
                TCP<\/code> \u662f\u4e00\u4e2a\u53cc\u5411\u7684\u901a\u4fe1\u534f\u8bae\uff0c\u56e0\u6b64\u6570\u636e\u53ef\u4ee5\u901a\u8fc7\u4e24\u4e2a\u6570\u636e\u6d41\u5728\u540c\u4e00\u65f6\u95f4\u53d1\u9001.\u4ee5\u4e0b\u662f\u4e00\u4e9b\u7c7b\u63d0\u4f9b\u7684\u4e00\u5957\u5b8c\u6574\u7684\u6709\u7528\u7684\u65b9\u6cd5\u6765\u5b9e\u73b0 socket\u3002<\/p>\n
                \u4e0b\u9762\u6211\u4eec\u624b\u52a8\u5b9e\u73b0\u4e00\u4e0b\uff0c\u6211\u4eec\u5148\u5b9e\u73b0 ````\u5ba2\u6237\u7aef``` \uff1a<\/p>\n
                <\/span>    \/\/ \u5ba2\u6237\u7aefsocket<\/span>
                    public<\/span> static<\/span> void<\/span> clientSocket<\/span>()<\/span> throws<\/span> IOException <\/span>{
                        int<\/span> port = 1000<\/span>;
                        String host = \"localhost\"<\/span>;

                        \/\/ \u521b\u5efa\u5957\u63a5\u5b57<\/span>
                        Socket socket = new<\/span> Socket(host, port);
                        \/\/ \u5982\u679c\u94fe\u63a5\u4e0d\u4e0a\u4f1a\u62a5\u9519  Connection refused (Connection refused)<\/span>
                        Log.info(\"\u94fe\u63a5\u5230\u8fdc\u7a0b\u4e3b\u673a\u5730\u5740\uff1a \"<\/span> + socket.getRemoteSocketAddress());

                        \/\/ \u83b7\u53d6\u5957\u63a5\u5b57\u8f93\u51fa\u6d41<\/span>
                        OutputStream outputStream = socket.getOutputStream();
                        \/\/ \u5efa\u7acb\u6570\u636e\u8f93\u51fa\u6d41<\/span>
                        DataOutputStream dataOutputStream = new<\/span> DataOutputStream(outputStream);

                        \/\/ \u5199\u5165\u6570\u636e - \u5199\u5165\u5b57\u7b26\u6570\u636e<\/span>
                        dataOutputStream.writeUTF(\"\u6211\u662f\u5ba2\u6237\u7aef socket\"<\/span>);


                        \/\/ \u83b7\u53d6\u670d\u52a1\u7aef\u7684\u54cd\u5e94<\/span>

                        \/\/ \u83b7\u53d6\u8f93\u5165\u6d41<\/span>
                        InputStream inputStream = socket.getInputStream();
                        \/\/ \u521b\u5efa\u6570\u636e\u8f93\u5165\u6d41<\/span>
                        DataInputStream dataInputStream = new<\/span> DataInputStream(inputStream);
                        \/\/ \u8bfb\u53d6\u6570\u636e<\/span>
                        Log.info(dataInputStream.readUTF());

                        \/\/ \u5173\u95ed\u5ba2\u6237\u7aef<\/span>
                        socket.close();
                  }
                <\/code><\/pre>\n
                \u670d\u52a1\u7aef\uff1a<\/p>\n
                <\/span> \/\/ \u670d\u52a1\u7aefsocket<\/span>
                  public<\/span> static<\/span> void<\/span> serverSocket<\/span>()<\/span> throws<\/span> IOException <\/span>{
                        \/\/ \u521b\u5efa\u670d\u52a1\u7aef<\/span>
                        ServerSocket serverSocket = new<\/span> ServerSocket(1000<\/span>);
                        \/\/ \u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4 ms - 30s \u5185\u672a\u6536\u5230\u6d88\u606f\u81ea\u52a8\u9000\u51fa<\/span>
                        serverSocket.setSoTimeout(30000<\/span>);

                        while<\/span>(true<\/span>) {
                          try<\/span> {
                              Log.info(\"\u7b49\u5f85\u8fdc\u7a0b\u8fde\u63a5---->\"<\/span> + serverSocket.getLocalPort()); \/\/ \u7b49\u5f85\u8fdc\u7a0b\u8fde\u63a5---->1000<\/span>

                              \/\/ \u83b7\u53d6\u670d\u52a1\u7aef\u5957\u63a5\u5b57<\/span>
                              Socket socket = serverSocket.accept();

                              Log.info(\"\u8fdc\u7a0b\u4e3b\u673a\u5730\u5740: ---->\"<\/span> + socket.getRemoteSocketAddress());

                              \/\/ \u83b7\u53d6\u5ba2\u6237\u7aef\u54cd\u5e94<\/span>
                              \/\/ \u521b\u5efa\u8f93\u5165\u6d41<\/span>
                              DataInputStream dataInputStream = new<\/span> DataInputStream(socket.getInputStream());
                              Log.info(\"\u5ba2\u6237\u7aef\u8bf4\u4e86: ---->\"<\/span> + dataInputStream.readUTF());

                              \/\/ \u53d1\u9001\u6d88\u606f\u7ed9\u5ba2\u6237\u7aef<\/span>
                              OutputStream outputStream = socket.getOutputStream();
                              DataOutputStream dataOutputStream = new<\/span> DataOutputStream(outputStream);
                              dataOutputStream.writeUTF(\"\u6211\u6536\u5230\u4e86\u4f60\u7684\u6d88\u606f \/ server Socket\"<\/span>);

                              socket.close();
                              
                \/\/ \u76f8\u5173\u8f93\u51fa:<\/span>

                \/\/  \u670d\u52a1\u7aef:<\/span>
                \/\/                \u7b49\u5f85\u8fdc\u7a0b\u8fde\u63a5---->1000<\/span>
                \/\/                \u8fdc\u7a0b\u4e3b\u673a\u5730\u5740: ---->\/127.0.0.1:59773<\/span>
                \/\/                \u5ba2\u6237\u7aef\u8bf4\u4e86: ---->\u6211\u662f\u5ba2\u6237\u7aef socket<\/span>
                \/\/                \u7b49\u5f85\u8fdc\u7a0b\u8fde\u63a5---->1000<\/span>
                \/\/                \u8fdc\u7a0b\u4e3b\u673a\u5730\u5740: ---->\/127.0.0.1:59778<\/span>
                \/\/                \u5ba2\u6237\u7aef\u8bf4\u4e86: ---->\u6211\u662f\u5ba2\u6237\u7aef socket<\/span>
                \/\/                \u7b49\u5f85\u8fdc\u7a0b\u8fde\u63a5---->1000<\/span>


                \/\/ \u5ba2\u6237\u7aef:<\/span>
                \/\/                \u94fe\u63a5\u5230\u8fdc\u7a0b\u4e3b\u673a\u5730\u5740\uff1alocalhost\/127.0.0.1:1000<\/span>
                \/\/                \u6211\u6536\u5230\u4e86\u4f60\u7684\u6d88\u606f \/ server Socket<\/span>

                          }catch<\/span> (IOException e) {
                              Log.info(\"\u670d\u52a1\u7aef\u51fa\u9519\u4e86 ----> \"<\/span> + e.getMessage());
                              break<\/span>;
                          }
                        }
                    }
                <\/code><\/pre>\n
                UDP\u5b9e\u73b0<\/span><\/h3>\n
                \u6211\u4eec\u4e4b\u524d\u63d0\u5230\u8fc7 udp<\/code>, \u6240\u4ee5\u8fd9\u91cc\u6211\u4eec\u4e5f\u52a8\u624b\u5b9e\u73b0\u4e00\u4e0b,\u6838\u5fc3\u7c7b\u4e3b\u8981\u662f\u4ee5\u4e0b:<\/p>\n
                  \n
                • \n
                  Datagram<\/section>\n<\/li>\n
                • \n
                  DatagramSocket\uff1a\u901a\u4fe1\u7c7b<\/section>\n<\/li>\n
                • \n
                  DatagramPacket\uff1a\u6570\u636e\u5305\u7c7b(\u5e73\u65f6\u8bf4\u7684\u4e22\u5305\u5565\u7684\uff0c\u4e22\u7684\u5c31\u662f\u6570\u636e\u5305)<\/section>\n<\/li>\n<\/ul>\n
                  \u7eb8\u4e0a\u5f97\u6765\u7ec8\u89c9\u6d45\u554a<\/code>\uff0c\u8fd9\u6b21\u5462\uff0c\u6211\u4eec\u6311\u6218\u4e00\u4e0b\u81ea\u5df1\uff0c\u6211\u4eec\u4e0d\u4f20\u5b57\u7b26\u4e32\u4e86\uff0c\u6211\u4eec\u6765\u4f20\u6587\u4ef6\uff0c\u8fd9\u600e\u4e48\u53bb\u5b9e\u73b0\u5462, \u8fd9\u5c31\u8003\u9a8c\u6211\u4eec\u4e4b\u524d\u5b66\u7684\u600e\u4e48\u6837\u4e86, \u8fd8\u662f\u4e00\u6837\u7684\uff0c\u6211\u4eec\u5148\u5b9e\u73b0 \u5ba2\u6237\u7aef<\/code><\/p>\n
                  <\/span> public<\/span> static<\/span> void<\/span> dataGramClient<\/span>()<\/span> throws<\/span> IOException <\/span>{
                      \/\/ \u521b\u5efa\u4e00\u4e2a\u6570\u636e\u5305\u5bf9\u8c61 \u5e76\u7ed1\u5b9a\u5230\u5185\u6838ip<\/span>
                      DatagramSocket socket = new<\/span> DatagramSocket(1001<\/span>);
                      Log.info(\"client: \"<\/span> + socket.getLocalAddress());

                      \/\/ \u5199\u5165\u6570\u636e\u5230\u5305<\/span>
                      FileInputStream fileInputStream = new<\/span> FileInputStream(\"test\/dog.jpg\"<\/span>);
                      byte<\/span>[] buffer = new<\/span> byte<\/span>[1024<\/span> * 2<\/span>];
                      \/\/ \u5982\u679c\u662f\u6570\u636e\u91cf\u5927\uff0c \u6bd4\u5982\u6587\u4ef6\u53ef\u4ee5\u5229\u7528 buffer stream \u501f\u7528\u7f13\u51b2\u533a\u53bb\u8bfb\u53d6\u6570\u636e<\/span>
                      BufferedInputStream bufferedInputStream = new<\/span> BufferedInputStream(fileInputStream);
                      int<\/span> cnt;
                      while<\/span>((cnt = bufferedInputStream.read(buffer, 0<\/span>, buffer.length)) != -1<\/span>) {
                          \/\/ \u5c01\u5305<\/span>
                          DatagramPacket dp = new<\/span> DatagramPacket(buffer, 0<\/span>, cnt);

                          \/\/ \u53d1\u9001\u5305 - Message too long (sendto failed) udp \u652f\u6301\u7684\u5305\u6700\u5927\u662f 64k<\/span>
                          \/\/ dp.setData(buffer); \/\/ \u5982\u679c\u521d\u59cb\u5316\u597d\u7684\uff0c \u5c31\u4e0d\u7528setData<\/span>
                          dp.setAddress(InetAddress.getLocalHost());
                          dp.setPort(1002<\/span>);
                          socket.send(dp);
                          Log.info(\"\u4f20\u8f93\u4e2d...\"<\/span>);

                          \/\/ cnt \u7b49\u4e8ebuffer.length<\/span>
                          Log.info(\"buffer read index --->\"<\/span>);
                      }

                      Log.info(\"\u4f20\u8f93\u5b8c\u6bd5\"<\/span>);
                      \/\/ \u5173\u95ed\u8f93\u5165\u6d41 - \u4e0d\u7136\u4f1a\u5bfc\u81f4\u963b\u585e<\/span>
                      bufferedInputStream.close();
                      Log.info(\"close\"<\/span>);

                      \/\/ \u53d1\u5b8c\u540e\u53d1\u9001\u4e00\u4e2a\u7ed3\u675f\u7684\u6307\u4ee4<\/span>
                      byte<\/span>[] successData = \"FILE OK\"<\/span>.getBytes(StandardCharsets.UTF_8);
                      DatagramPacket successPak = new<\/span> DatagramPacket(successData, 0<\/span>, successData.length);
                      successPak.setAddress(InetAddress.getLocalHost());
                      successPak.setPort(1002<\/span>);
                      socket.send(successPak);
                      Log.info(\"send\"<\/span>);

                      \/\/ \u521b\u5efa\u4e00\u4e2a\u5305 1M \u5927\u5c0f<\/span>
                      DatagramPacket packet = new<\/span> DatagramPacket(new<\/span> byte<\/span>[1024<\/span>], 1024<\/span>);
                      \/\/ \u8bbe\u7f6e\u8fdc\u7a0b\u4e3b\u673a - \u7528\u4e8e\u6570\u636e\u4e0a\u62a5\u548c\u63a5\u6536<\/span>
                      packet.setPort(1002<\/span>);
                      packet.setAddress(InetAddress.getLocalHost());

                      \/\/ \u63a5\u6536\u5305 - \u5982\u679c\u6ca1\u63a5\u6536\u5230 \u4f1a\u963b\u585e<\/span>
                      socket.receive(packet);

                      \/\/ \u83b7\u53d6\u6570\u636e<\/span>
                      Log.info(packet.getAddress() + \" ---> \"<\/span>+ new<\/span> String(packet.getData(), \"UTF-8\"<\/span>));

                      \/\/ \u5173\u95ed\u5ba2\u6237\u7aef<\/span>
                      socket.close();
                  }
                  <\/code><\/pre>\n
                  \u5728\u770b\u4e00\u4e0b \u670d\u52a1\u7aef<\/code><\/p>\n
                  <\/span> \/\/ \u670d\u52a1\u7aef<\/span>
                    public<\/span> static<\/span> void<\/span> dataGramServer<\/span>()<\/span> throws<\/span> IOException <\/span>{
                          \/\/ \u521b\u5efa\u4e00\u4e2a\u6570\u636e\u5305\u5bf9\u8c61 \u5e76\u7ed1\u5b9a\u5230\u5185\u6838ip<\/span>
                          DatagramSocket socket = new<\/span> DatagramSocket(1002<\/span>);
                          Log.info(\"server: \"<\/span> + socket.getLocalAddress());

                          \/\/ \u521b\u5efa\u6587\u4ef6\u8f93\u51fa\u6d41<\/span>
                          FileOutputStream fos = new<\/span> FileOutputStream(\"test\/dog1.jpg\"<\/span>);
                          \/\/ \u521b\u5efa\u4e00\u4e2a\u8f93\u51fa\u6d41<\/span>
                          BufferedOutputStream bos = new<\/span> BufferedOutputStream(fos);

                          byte<\/span>[] buffer = new<\/span> byte<\/span>[1024<\/span> * 2<\/span>];
                          while<\/span> (true<\/span>) {
                              \/\/ \u89e3\u5305<\/span>
                              DatagramPacket fileDp = new<\/span> DatagramPacket(buffer, 0<\/span>, buffer.length);
                              fileDp.setPort(1001<\/span>);
                              fileDp.setAddress(InetAddress.getLocalHost());
                              socket.receive(fileDp);

                              \/\/ \u5224\u65ad\u662f\u5426\u63a5\u6536\u5230\u6587\u4ef6\u4e0a\u4f20\u5b8c\u6bd5\u6307\u4ee4<\/span>
                              if<\/span>(new<\/span> String(fileDp.getData(), \"UTF-8\"<\/span>).contains(\"FILE OK\"<\/span>)) {
                                  Log.info(\"\u6587\u4ef6\u63a5\u6536\u5b8c\u6bd5\"<\/span>);
                                  break<\/span>;
                              }

                              \/\/ \u5199\u5165\u6587\u4ef6<\/span>
                              bos.write(buffer, 0<\/span>, buffer.length);
                              bos.flush();

                              Log.info(\"\u6b63\u5728\u63a5\u6536\u6570\u636e ->\"<\/span>);
                          }

                          \/\/ \u5173\u95ed\u8f93\u51fa\u6d41<\/span>
                          bos.close();
                          Log.info(\"\u6587\u4ef6\u53e5\u67c4\u5173\u95ed\"<\/span>);

                          \/\/ \u8bbe\u7f6e\u6570\u636e<\/span>
                          byte<\/span>[] result = \"\u6211\u5df2\u7ecf\u4e0b\u8f7d\u597d\u4e86\u6587\u4ef6\"<\/span>.getBytes(StandardCharsets.UTF_8);
                          DatagramPacket resPck = new<\/span> DatagramPacket(result, 0<\/span>, result.length);
                          resPck.setPort(1001<\/span>);
                          resPck.setAddress(InetAddress.getLocalHost());
                          \/\/ \u53d1\u9001\u6570\u636e\u7ed9\u5ba2\u6237\u7aef - \u53d1\u5305<\/span>
                          socket.send(resPck);

                          Log.info(\"\u53d1\u9001\u7ed3\u679c\"<\/span>);

                          \/\/ \u5173\u95ed\u670d\u52a1\u7aef<\/span>
                          socket.close();
                    }
                  <\/code><\/pre>\n
                  \u7531\u6b64\uff0c\u6211\u4eec\u8fd9\u4e2a\u5c0f\u529f\u80fd\u5c31\u7b97\u5b9e\u73b0\u4e86~<\/p>\n
                  NIO<\/span><\/h2>\n
                  \u4e4b\u524d\u7684\u6848\u4f8b\u4e2d\uff0c\u6709\u63d0\u5230\u963b\u585e<\/code>, \u6ca1\u6709\u600e\u4e48\u7ec6\u8bb2\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u8bf4\u8bf4\u51e0\u79cdIO\u6a21\u5f0f\uff0c\u5728\u4e86\u89e3\u8fd9\u4e2a\u4e4b\u524d\u5462\uff0c\u6211\u4eec\u5148\u6765\u804a\u804a\u4ec0\u4e48\u662f\u540c\u6b65<\/code> \u548c \u5f02\u6b65<\/code><\/p>\n
                  \u540c\u6b65 & \u5f02\u6b65<\/span><\/h3>\n
                  \u540c\u6b65\u548c\u5f02\u6b65\u662f\u9488\u5bf9\u5e94\u7528\u7a0b\u5e8f\u548c\u5185\u6838\u7684\u4ea4\u4e92\u800c\u8a00\u7684\uff0c\u540c\u6b65\u6307\u7684\u662f\u7528\u6237\u8fdb\u7a0b\u89e6\u53d1IO \u64cd\u4f5c\u5e76\u7b49\u5f85\u6216\u8005\u8f6e\u8be2\u7684\u53bb\u67e5\u770bIO \u64cd\u4f5c\u662f\u5426\u5c31\u7eea\uff0c\u800c\u5f02\u6b65\u662f\u6307\u7528\u6237\u8fdb\u7a0b\u89e6\u53d1IO \u64cd\u4f5c\u4ee5\u540e\u4fbf\u5f00\u59cb\u505a\u81ea\u5df1\u7684\u4e8b\u60c5\uff0c\u800c\u5f53IO \u64cd\u4f5c\u5df2\u7ecf\u5b8c\u6210\u7684\u65f6\u5019\u4f1a\u5f97\u5230IO \u5b8c\u6210\u7684\u901a\u77e5\u3002<\/p>\n
                  \u5927\u767d\u8bdd\u8bb2\u5c31\u662f,\u4e3e\u4e2a\u94f6\u884c\u7684\u4f8b\u5b50:<\/p>\n
                    \n
                  • \n
                    \n
                    \u540c\u6b65<\/code> \uff1a\u81ea\u5df1\u4eb2\u81ea\u51fa\u9a6c\u6301\u94f6\u884c\u5361\u5230\u94f6\u884c\u53d6\u94b1\uff08\u4f7f\u7528\u540c\u6b65 IO \u65f6\uff0cJava \u81ea\u5df1\u5904\u7406IO \u8bfb\u5199\uff09\uff1b<\/p>\n<\/section>\n<\/li>\n
                  • \n
                    \n
                    \u5f02\u6b65<\/code> \uff1a\u59d4\u6258\u4e00\u5c0f\u5f1f\u62ff\u94f6\u884c\u5361\u5230\u94f6\u884c\u53d6\u94b1\uff0c\u7136\u540e\u7ed9\u4f60\uff08\u4f7f\u7528\u5f02\u6b65IO \u65f6\uff0cJava \u5c06 IO \u8bfb\u5199\u59d4\u6258\u7ed9OS \u5904\u7406\uff0c\u9700\u8981\u5c06\u6570\u636e\u7f13\u51b2\u533a\u5730\u5740\u548c\u5927\u5c0f\u4f20\u7ed9OS(\u94f6\u884c\u5361\u548c\u5bc6\u7801)\uff0cOS \u9700\u8981\u652f\u6301\u5f02\u6b65IO\u64cd\u4f5cAPI\uff09<\/p>\n<\/section>\n<\/li>\n<\/ul>\n
                    \u963b\u585e & \u5f02\u6b65<\/span><\/h3>\n
                    \u963b\u585e\u548c\u975e\u963b\u585e\u662f\u9488\u5bf9\u4e8e\u8fdb\u7a0b\u5728\u8bbf\u95ee\u6570\u636e\u7684\u65f6\u5019\uff0c\u6839\u636eIO\u64cd\u4f5c\u7684\u5c31\u7eea\u72b6\u6001\u6765\u91c7\u53d6\u7684\u4e0d\u540c\u65b9\u5f0f\uff0c\u8bf4\u767d\u4e86\u662f\u4e00\u79cd\u8bfb\u53d6\u6216\u8005\u5199\u5165\u64cd\u4f5c\u65b9\u6cd5\u7684\u5b9e\u73b0\u65b9\u5f0f\uff0c\u963b\u585e\u65b9\u5f0f\u4e0b\u8bfb\u53d6\u6216\u8005\u5199\u5165\u51fd\u6570\u5c06\u4e00\u76f4\u7b49\u5f85\uff0c\u800c\u975e\u963b\u585e\u65b9\u5f0f\u4e0b\uff0c\u8bfb\u53d6\u6216\u8005\u5199\u5165\u65b9\u6cd5\u4f1a\u7acb\u5373\u8fd4\u56de\u4e00\u4e2a\u72b6\u6001\u503c\u3002<\/p>\n
                    \u8fd8\u662f\u4e0a\u8fb9\u7684\u4f8b\u5b50:<\/p>\n
                      \n
                    • \n
                      \n
                      \u963b\u585e \uff1aATM\u6392\u961f\u53d6\u6b3e\uff0c\u4f60\u53ea\u80fd\u7b49\u5f85<\/p>\n<\/section>\n<\/li>\n
                    • \n
                      \n
                      \u975e\u963b\u585e \uff1a\u67dc\u53f0\u53d6\u6b3e\uff0c\u53d6\u4e2a\u53f7\uff0c\u7136\u540e\u5750\u5728\u6905\u5b50\u4e0a\u505a\u5176\u5b83\u4e8b\uff0c\u7b49\u53f7\u5e7f\u64ad\u4f1a\u901a\u77e5\u4f60\u529e\u7406\uff0c\u6ca1\u5230\u53f7\u4f60\u5c31\u4e0d\u80fd\u53bb\uff0c\u4f60\u53ef\u4ee5\u4e0d\u65ad\u95ee\u670d\u52a1\u4eba\u5458\u6392\u5230\u4e86\u6ca1\u6709,\u670d\u52a1\u4eba\u5458\u5982\u679c\u8bf4\u8fd8\u6ca1\u5230\u4f60\u5c31\u4e0d\u80fd\u53bb<\/p>\n<\/section>\n<\/li>\n<\/ul>\n
                      \u597d\u4e86\uff0c\u6709\u4e86\u4e0a\u9762\u6982\u5ff5\u7684\u7406\u89e3\uff0c\u5927\u6982\u4f60\u4f1a\u731c\u5230\u6709\u54ea\u4e9b\u6a21\u5f0f\u4e86\u3002\u6ca1\u9519\uff0c\u6211\u4eec\u6765\u4e00\u8d77\u7ec4\u8bcd<\/p>\n
                      \u540c\u6b65\u963b\u585e BIO (Blocking IO)<\/span><\/h3>\n
                      \u8fd9\u662f\u6211\u4eec\u6bd4\u8f83\u5e38\u89c1\u7684\u65b9\u5f0f, BIO\u7f16\u7a0b\u65b9\u5f0f\u901a\u5e38\u662f\u5728JDK1.4\u7248\u672c\u4e4b\u524d\u5e38\u7528\u7684\u7f16\u7a0b\u65b9\u5f0f\u3002\u7f16\u7a0b\u5b9e\u73b0\u8fc7\u7a0b\u4e3a\uff1a\u9996\u5148\u5728\u670d\u52a1\u7aef\u542f\u52a8\u4e00\u4e2aServerSocket\u6765\u76d1\u542c\u7f51\u7edc\u8bf7\u6c42\uff0c\u5ba2\u6237\u7aef\u542f\u52a8Socket\u53d1\u8d77\u7f51\u7edc\u8bf7\u6c42\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0bServerSocket\u56de\u5efa\u7acb\u4e00\u4e2a\u7ebf\u7a0b\u6765\u5904\u7406\u6b64\u8bf7\u6c42\uff0c\u5982\u679c\u670d\u52a1\u7aef\u6ca1\u6709\u7ebf\u7a0b\u53ef\u7528\uff0c\u5ba2\u6237\u7aef\u5219\u4f1a\u963b\u585e\u7b49\u5f85\u6216\u906d\u5230\u62d2\u7edd\u3002\u4e14\u5efa\u7acb\u597d\u7684\u8fde\u63a5\uff0c\u5728\u901a\u8baf\u8fc7\u7a0b\u4e2d\uff0c\u662f\u540c\u6b65\u7684\u3002\u5728\u5e76\u53d1\u5904\u7406\u6548\u7387\u4e0a\u6bd4\u8f83\u4f4e\u3002\u5927\u81f4\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n
                      \u540c\u6b65\u5e76\u963b\u585e\uff0c\u670d\u52a1\u5668\u5b9e\u73b0\u6a21\u5f0f\u4e3a\u4e00\u4e2a\u8fde\u63a5\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u5373\u5ba2\u6237\u7aef\u6709\u8fde\u63a5\u8bf7\u6c42\u65f6\u670d\u52a1\u5668\u7aef\u5c31\u9700\u8981\u542f\u52a8\u4e00\u4e2a\u7ebf\u7a0b\u8fdb\u884c\u5904\u7406\uff0c \u5982\u679c\u8fd9\u4e2a\u8fde\u63a5\u4e0d\u505a\u4efb\u4f55\u4e8b\u60c5\u4f1a\u9020\u6210\u4e0d\u5fc5\u8981\u7684\u7ebf\u7a0b\u5f00\u9500\uff0c\u5f53\u7136\u53ef\u4ee5\u901a\u8fc7\u7ebf\u7a0b\u6c60\u673a\u5236\u6539\u5584\u3002BIO\u65b9\u5f0f\u9002\u7528\u4e8e\u8fde\u63a5\u6570\u76ee\u6bd4\u8f83\u5c0f\u4e14\u56fa\u5b9a\u7684\u67b6\u6784\uff0c\u8fd9\u79cd\u65b9\u5f0f\u5bf9\u670d\u52a1\u5668\u8d44\u6e90\u8981\u6c42\u6bd4\u8f83\u9ad8\uff0c\u5e76\u53d1\u5c40\u9650\u4e8e\u5e94\u7528\u4e2d\uff0cJDK1.4\u4ee5\u524d\u7684\u552f\u4e00\u9009\u62e9\uff0c\u4f46\u7a0b\u5e8f\u76f4\u89c2\u7b80\u5355\u6613\u7406\u89e3\u3002<\/p>\n
                      \u5f02\u6b65\u975e\u963b\u585e\u7684\u7f16\u7a0b\u65b9\u5f0f AIO (Asynchronous IO)<\/span><\/h3>\n
                      \u5f53\u8fdb\u884c\u8bfb\u5199\u64cd\u4f5c\u65f6\uff0c\u53ea\u987b\u76f4\u63a5\u8c03\u7528API\u7684read\u6216write\u65b9\u6cd5\u5373\u53ef\u3002\u8fd9\u4e24\u79cd\u65b9\u6cd5\u5747\u4e3a\u5f02\u6b65\u7684\uff0c\u5bf9\u4e8e\u8bfb\u64cd\u4f5c\u800c\u8a00\uff0c\u5f53\u6709\u6d41\u53ef\u8bfb\u53d6\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u5c06\u53ef\u8bfb\u7684\u6d41\u4f20\u5165read\u65b9\u6cd5\u7684\u7f13\u51b2\u533a\uff0c\u5e76\u901a\u77e5\u5e94\u7528\u7a0b\u5e8f\uff1b\u5bf9\u4e8e\u5199\u64cd\u4f5c\u800c\u8a00\uff0c\u5f53\u64cd\u4f5c\u7cfb\u7edf\u5c06write\u65b9\u6cd5\u4f20\u9012\u7684\u6d41\u5199\u5165\u5b8c\u6bd5\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4e3b\u52a8\u901a\u77e5\u5e94\u7528\u7a0b\u5e8f\u3002\u5373\u53ef\u4ee5\u7406\u89e3\u4e3a\uff0cread\/write\u65b9\u6cd5\u90fd\u662f\u5f02\u6b65\u7684\uff0c\u5b8c\u6210\u540e\u4f1a\u4e3b\u52a8\u8c03\u7528\u56de\u8c03\u51fd\u6570\u3002<\/p>\n
                      \u5728JDK1.7\u4e2d\uff0c\u8fd9\u90e8\u5206\u5185\u5bb9\u88ab\u79f0\u4f5cNIO.2\uff0c\u4e3b\u8981\u5728java.nio.channels\u5305\u4e0b\u589e\u52a0\u4e86\u4e0b\u9762\u56db\u4e2a\u5f02\u6b65\u901a\u9053\uff1aAsynchronousSocketChannel\u3001AsynchronousServerSocketChannel\u3001AsynchronousFileChannel\u3001AsynchronousDatagramChannel<\/code><\/p>\n
                      nodejs<\/code>\u5b83\u5c31\u662f\u4f7f\u7528\u8fd9\u79cd\u6a21\u5f0f\uff0c\u65e2\u7136\u804a\u5230\uff0c\u5c31\u7b80\u5355\u8bb2\u8bb2\uff0c\u5b83\u4e0d\u662f\u672c\u8282\u4e3b\u8981\u5185\u5bb9<\/p>\n
                      \u5b83\u5462\uff0c\u5728\u4e3b\u7ebf\u7a0b\u91cc\u7ef4\u62a4\u4e86\u4e00\u4e2a\u4e8b\u4ef6\u961f\u5217\uff0c\u5f53\u63a5\u5230\u8bf7\u6c42\u540e\uff0c\u5c31\u5c06\u8be5\u8bf7\u6c42\u4f5c\u4e3a\u4e00\u4e2a\u4e8b\u4ef6\u653e\u5165\u8fd9\u4e2a\u961f\u5217\u4e2d\uff0c\u7136\u540e\u7ee7\u7eed\u63a5\u6536\u5176\u4ed6\u8bf7\u6c42\u3002\u5f53\u4e3b\u7ebf\u7a0b\u7a7a\u95f2\u65f6(\u6ca1\u6709\u8bf7\u6c42\u63a5\u5165\u65f6)\uff0c\u5c31\u5f00\u59cb\u5faa\u73af\u4e8b\u4ef6\u961f\u5217\uff0c\u68c0\u67e5\u961f\u5217\u4e2d\u662f\u5426\u6709\u8981\u5904\u7406\u7684\u4e8b\u4ef6\uff0c\u8fd9\u65f6\u8981\u5206\u4e24\u79cd\u60c5\u51b5\uff1a\u5982\u679c\u662f\u975e I\/O \u4efb\u52a1\uff0c\u5c31\u901a\u8fc7\u4e3b\u7ebf\u7a0b\u5904\u7406\uff0c\u5e76\u901a\u8fc7\u56de\u8c03\u51fd\u6570\u8fd4\u56de\u5230\u4e0a\u5c42\u8c03\u7528\uff1b\u5982\u679c\u662f I\/O \u4efb\u52a1\uff0c\u5c31\u4ece \u7ebf\u7a0b\u6c60 \u4e2d\u62ff\u51fa\u4e00\u4e2a\u7ebf\u7a0b\u6765\u5904\u7406\u8fd9\u4e2a\u4e8b\u4ef6\uff0c\u5e76\u901a\u8fc7\u89c2\u5bdf\u8005\u6307\u5b9a\u56de\u8c03\u51fd\u6570\uff0c\u7136\u540e\u7ee7\u7eed\u5faa\u73af\u961f\u5217\u4e2d\u7684\u5176\u4ed6\u4e8b\u4ef6\u3002\u5f53\u7ebf\u7a0b\u4e2d\u7684 I\/O \u4efb\u52a1\u5b8c\u6210\u4ee5\u540e\uff0c\u901a\u8fc7\u89c2\u5bdf\u8005\u6267\u884c\u6307\u5b9a\u7684\u56de\u8c03\u51fd\u6570\uff0c\u5e76\u628a\u8fd9\u4e2a\u5b8c\u6210\u7684\u4e8b\u4ef6\u653e\u5230\u4e8b\u4ef6\u961f\u5217\u7684\u5c3e\u90e8\uff0c\u7b49\u5f85\u4e8b\u4ef6\u5faa\u73af\uff0c\u5f53\u4e3b\u7ebf\u7a0b\u518d\u6b21\u5faa\u73af\u5230\u8be5\u4e8b\u4ef6\u65f6\uff0c\u5c31\u76f4\u63a5\u5904\u7406\u5e76\u8fd4\u56de\u7ed9\u4e0a\u5c42\u8c03\u7528<\/p>\n
                      \u540c\u6b65\u975e\u963b\u585e\u7684\u7f16\u7a0b\u65b9\u5f0f NIO (Unblocking IO)<\/span><\/h3>\n
                      \u7ec8\u4e8e\u5230\u6211\u4eec\u91cd\u70b9\u5173\u6ce8\u7684\u5bf9\u8c61\u4e86, \u968f\u7740\u6211\u4eec\u4e1a\u52a1\u7684\u4e0d\u65ad\u6269\u5f20\uff0c\u7a0b\u5e8f\u540c\u6837\u4e5f\u8fce\u6765\u4e86\u5de8\u5927\u7684\u6311\u6218\uff0c\u5404\u79cd\u9ad8\u5e76\u53d1\u7684\u573a\u666f\u4e5f\u968f\u4e4b\u800c\u6765, \u6240\u4ee5\u5f88\u591a\u6280\u672f\u7684\u51fa\u73b0\u90fd\u662f\u6709\u5b83\u5b58\u5728\u7684\u9053\u7406\u7684\uff0c\u672c\u8282\u53ef\u80fd\u6709\u70b9\u96be\u61c2\uff0c\u6211\u4eec\u672c\u8282\u7684\u4efb\u52a1\u5c31\u662f\u8981\u52a8\u624b\u5b9e\u73b0\u4e00\u4e2a NIO<\/code>\uff0c\u8010\u5fc3\u770b\u5b8c\u54e6 ~<\/p>\n
                      NIO\u672c\u8eab\u662f\u57fa\u4e8e\u4e8b\u4ef6\u9a71\u52a8\u601d\u60f3\u6765\u5b8c\u6210\u7684\uff0c\u5176\u4e3b\u8981\u60f3\u89e3\u51b3\u7684\u662fBIO<\/code>\u7684\u5927\u5e76\u53d1\u95ee\u9898\uff0cNIO<\/code>\u57fa\u4e8eReactor<\/code>\uff0c\u5f53socket<\/code>\u6709\u6d41\u53ef\u8bfb\u6216\u53ef\u5199\u5165socket\u65f6\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u76f8\u5e94\u7684\u901a\u77e5\u5f15\u7528\u7a0b\u5e8f\u8fdb\u884c\u5904\u7406\uff0c\u5e94\u7528\u518d\u5c06\u6d41\u8bfb\u53d6\u5230\u7f13\u51b2\u533a\u6216\u5199\u5165\u64cd\u4f5c\u7cfb\u7edf\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u8fd9\u4e2a\u65f6\u5019\uff0c\u5df2\u7ecf\u4e0d\u662f\u4e00\u4e2a\u8fde\u63a5\u5c31\u8981\u5bf9\u5e94\u4e00\u4e2a\u5904\u7406\u7ebf\u7a0b\u4e86\uff0c\u800c\u662f\u6709\u6548\u7684\u8bf7\u6c42\uff0c\u5bf9\u5e94\u4e00\u4e2a\u7ebf\u7a0b\uff0c\u5f53\u8fde\u63a5\u6ca1\u6709\u6570\u636e\u65f6\uff0c\u662f\u6ca1\u6709\u5de5\u4f5c\u7ebf\u7a0b\u6765\u5904\u7406\u7684\u3002\u5f3a\u5927\u7684\u901a\u4fe1\u6846\u67b6 netty<\/code>\u5c31\u662f\u57fa\u4e8e\u5b83<\/p>\n
                      \u540c\u6837\u7684\uff0c\u6211\u4eec\u7406\u89e3\u5b8c\u57fa\u672c\u6982\u5ff5\u540e\uff0c\u5148\u8865\u5145\u4e00\u4e0b\u524d\u7f6e\u77e5\u8bc6, \u6211\u4eec\u5148\u804a\u4e0b \u6d41\u4e0e\u5757<\/code><\/p>\n
                      \u6d41\u4e0e\u5757<\/h4>\n
                      I\/O<\/code> \u4e0e NIO<\/code> \u6700\u91cd\u8981\u7684\u533a\u522b\u662f\u6570\u636e\u6253\u5305\u548c\u4f20\u8f93\u7684\u65b9\u5f0f\uff0cI\/O<\/code> \u4ee5\u6d41\u7684\u65b9\u5f0f\u5904\u7406\u6570\u636e\uff0c\u800c NIO<\/code> \u4ee5\u5757\u7684\u65b9\u5f0f\u5904\u7406\u6570\u636e\u3002<\/p>\n
                        \n
                      • \n
                        \n
                        \u9762\u5411\u6d41\u7684 I\/O \u4e00\u6b21\u5904\u7406\u4e00\u4e2a\u5b57\u8282\u6570\u636e\uff1a\u4e00\u4e2a\u8f93\u5165\u6d41\u4ea7\u751f\u4e00\u4e2a\u5b57\u8282\u6570\u636e\uff0c\u4e00\u4e2a\u8f93\u51fa\u6d41\u6d88\u8d39\u4e00\u4e2a\u5b57\u8282\u6570\u636e\u3002\u4e3a\u6d41\u5f0f\u6570\u636e\u521b\u5efa\u8fc7\u6ee4\u5668\u975e\u5e38\u5bb9\u6613\uff0c\u94fe\u63a5\u51e0\u4e2a\u8fc7\u6ee4\u5668\uff0c\u4ee5\u4fbf\u6bcf\u4e2a\u8fc7\u6ee4\u5668\u53ea\u8d1f\u8d23\u590d\u6742\u5904\u7406\u673a\u5236\u7684\u4e00\u90e8\u5206\u3002\u4e0d\u5229\u7684\u4e00\u9762\u662f\uff0c\u9762\u5411\u6d41\u7684 I\/O \u901a\u5e38\u76f8\u5f53\u6162<\/p>\n<\/section>\n<\/li>\n
                      • \n
                        \n
                        \u9762\u5411\u5757\u7684 I\/O \u4e00\u6b21\u5904\u7406\u4e00\u4e2a\u6570\u636e\u5757\uff0c\u6309\u5757\u5904\u7406\u6570\u636e\u6bd4\u6309\u6d41\u5904\u7406\u6570\u636e\u8981\u5feb\u5f97\u591a\u3002\u4f46\u662f\u9762\u5411\u5757\u7684 I\/O \u7f3a\u5c11\u4e00\u4e9b\u9762\u5411\u6d41\u7684 I\/O \u6240\u5177\u6709\u7684\u4f18\u96c5\u6027\u548c\u7b80\u5355\u6027\u3002<\/p>\n<\/section>\n<\/li>\n<\/ul>\n
                        NIO<\/code> \u4e3b\u8981\u662f\u9762\u5411\u5757\u7684\u7ed3\u6784<\/p>\n
                        \u901a\u9053 channel<\/h4>\n
                        \u901a\u9053 Channel \u662f\u5bf9\u539f I\/O \u5305\u4e2d\u7684\u6d41\u7684\u6a21\u62df\uff0c\u53ef\u4ee5\u901a\u8fc7\u5b83\u8bfb\u53d6\u548c\u5199\u5165\u6570\u636e\u3002\u901a\u9053\u4e0e\u6d41\u7684\u4e0d\u540c\u4e4b\u5904\u5728\u4e8e\uff0c\u6d41\u53ea\u80fd\u5728\u4e00\u4e2a\u65b9\u5411\u4e0a\u79fb\u52a8(\u4e00\u4e2a\u6d41\u5fc5\u987b\u662f InputStream \u6216\u8005 OutputStream \u7684\u5b50\u7c7b)\uff0c\u800c\u901a\u9053\u662f\u53cc\u5411\u7684\uff0c\u53ef\u4ee5\u7528\u4e8e\u8bfb\u3001\u5199\u6216\u8005\u540c\u65f6\u7528\u4e8e\u8bfb\u5199\u3002\u901a\u9053\u5305\u62ec\u4ee5\u4e0b\u7c7b\u578b\uff1a<\/p>\n
                          \n
                        • \n
                          FileChannel\uff1a\u4ece\u6587\u4ef6\u4e2d\u8bfb\u5199\u6570\u636e<\/section>\n<\/li>\n
                        • \n
                          DatagramChannel\uff1a\u901a\u8fc7 UDP \u8bfb\u5199\u7f51\u7edc\u4e2d\u6570\u636e<\/section>\n<\/li>\n
                        • \n
                          SocketChannel\uff1a\u901a\u8fc7 TCP \u8bfb\u5199\u7f51\u7edc\u4e2d\u6570\u636e<\/section>\n<\/li>\n
                        • \n
                          ServerSocketChannel\uff1a\u53ef\u4ee5\u76d1\u542c\u65b0\u8fdb\u6765\u7684 TCP \u8fde\u63a5\uff0c\u5bf9\u6bcf\u4e00\u4e2a\u65b0\u8fdb\u6765\u7684\u8fde\u63a5\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a SocketChannel<\/section>\n<\/li>\n<\/ul>\n
                          \u7f13\u51b2\u533a Buffer<\/h4>\n
                          \u53d1\u9001\u7ed9\u4e00\u4e2a\u901a\u9053\u7684\u6240\u6709\u6570\u636e\u90fd\u5fc5\u987b\u9996\u5148\u653e\u5230\u7f13\u51b2\u533a\u4e2d\uff0c\u540c\u6837\u5730\uff0c\u4ece\u901a\u9053\u4e2d\u8bfb\u53d6\u7684\u4efb\u4f55\u6570\u636e\u90fd\u8981\u5148\u8bfb\u5230\u7f13\u51b2\u533a\u4e2d\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e0d\u4f1a\u76f4\u63a5\u5bf9\u901a\u9053\u8fdb\u884c\u8bfb\u5199\u6570\u636e\uff0c\u800c\u662f\u8981\u5148\u7ecf\u8fc7\u7f13\u51b2\u533a\u3002\u7f13\u51b2\u533a\u5b9e\u8d28\u4e0a\u662f\u4e00\u4e2a\u6570\u7ec4\uff0c\u4f46\u5b83\u4e0d\u4ec5\u4ec5\u662f\u4e00\u4e2a\u6570\u7ec4\u3002\u7f13\u51b2\u533a\u63d0\u4f9b\u4e86\u5bf9\u6570\u636e\u7684\u7ed3\u6784\u5316\u8bbf\u95ee\uff0c\u800c\u4e14\u8fd8\u53ef\u4ee5\u8ddf\u8e2a\u7cfb\u7edf\u7684\u8bfb\/\u5199\u8fdb\u7a0b\u3002<\/p>\n
                          \u7f13\u51b2\u533a\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u7c7b\u578b\uff1a<\/p>\n
                            \n
                          • \n
                            ByteBuffer<\/section>\n<\/li>\n
                          • \n
                            CharBuffer<\/section>\n<\/li>\n
                          • \n
                            ShortBuffer<\/section>\n<\/li>\n
                          • \n
                            IntBuffer<\/section>\n<\/li>\n
                          • \n
                            LongBuffer<\/section>\n<\/li>\n
                          • \n
                            FloatBuffer<\/section>\n<\/li>\n
                          • \n
                            DoubleBuffer<\/section>\n<\/li>\n<\/ul>\n
                            \u8fd9\u91cc\u5b9e\u73b0\u4e00\u4e2a\u6587\u4ef6\u590d\u5236<\/code>\u7684\u5c0f\u4f8b\u5b50\u6765\u76f4\u89c2\u611f\u53d7\u4e00\u4e0b\u901a\u9053\u548c\u7f13\u51b2\u533a\u7684\u6982\u5ff5<\/p>\n
                            <\/span>\/\/ \u7b80\u5355\u793a\u4f8b- \u6587\u4ef6\u5feb\u901f\u590d\u5236<\/span>
                              \/\/ \u53cc\u5411<\/span>
                              public<\/span> static<\/span> void<\/span> fastCopy<\/span>(String dst)<\/span> throws<\/span> IOException <\/span>{
                                  String src = \"test\/dog.jpg\"<\/span>;
                                  \/\/ \u521b\u5efa\u6587\u4ef6\u8f93\u5165\u6d41<\/span>
                                  FileInputStream fis = new<\/span> FileInputStream(src);
                                  \/\/ \u83b7\u53d6\u8f93\u5165\u901a\u9053<\/span>
                                  FileChannel fileInputChannel = fis.getChannel();

                                  \/\/ \u521b\u5efa\u6587\u4ef6\u8f93\u51fa\u6d41<\/span>
                                  FileOutputStream fos = new<\/span> FileOutputStream(dst);
                                  FileChannel fileOutChannel = fos.getChannel();

                                  \/\/ \u8bbe\u7f6e\u7f13\u51b2\u533a \u5206\u914d 1024\u5b57\u8282\u5927\u5c0f\u7684\u7f13\u5b58\u533a<\/span>
                                  ByteBuffer buffer = ByteBuffer.allocateDirect(1024<\/span>);


                                  while<\/span>(true<\/span>) {
                                      \/\/ \u8bfb\u53d6\u6587\u4ef6<\/span>
                                      int<\/span> r = fileInputChannel.read(buffer);
                                      \/\/ -1 \u8868\u793a EOF<\/span>
                                      if<\/span> (r == -1<\/span>) {
                                          break<\/span>;
                                      }

                                      \/\/ \u5207\u6362\u901a\u9053<\/span>
                                      buffer.flip();

                                      \/\/ \u5c06buffer\u5199\u5165<\/span>
                                      fileOutChannel.write(buffer);

                                      \/\/ \u6e05\u7a7a\u7f13\u51b2\u533a - \u4ee5\u4fbf\u4e0b\u6b21\u8bfb\u5199<\/span>
                                      buffer.clear();
                                  }

                                  Log.info(\"\u590d\u5236\u5b8c\u6bd5\"<\/span>);
                              }
                            <\/code><\/pre>\n
                            NIO \u9009\u62e9\u5668<\/h4>\n
                            NIO \u5b9e\u73b0\u4e86 IO \u591a\u8def\u590d\u7528\u4e2d\u7684 Reactor \u6a21\u578b\uff0c\u4e00\u4e2a\u7ebf\u7a0b Thread \u4f7f\u7528\u4e00\u4e2a\u9009\u62e9\u5668 Selector \u901a\u8fc7\u8f6e\u8be2\u7684\u65b9\u5f0f\u53bb\u76d1\u542c\u591a\u4e2a\u901a\u9053 Channel\u4e0a\u7684\u4e8b\u4ef6\uff0c\u4ece\u800c\u8ba9\u4e00\u4e2a\u7ebf\u7a0b\u5c31\u53ef\u4ee5\u5904\u7406\u591a\u4e2a\u4e8b\u4ef6\u3002\u901a\u8fc7\u914d\u7f6e\u76d1\u542c\u7684\u901a\u9053 Channel \u4e3a\u975e\u963b\u585e\uff0c\u90a3\u4e48\u5f53 Channel \u4e0a\u7684 IO \u4e8b\u4ef6\u8fd8\u672a\u5230\u8fbe\u65f6\uff0c\u5c31\u4e0d\u4f1a\u8fdb\u5165\u963b\u585e\u72b6\u6001\u4e00\u76f4\u7b49\u5f85\uff0c\u800c\u662f\u7ee7\u7eed\u8f6e\u8be2\u5176\u5b83 Channel\uff0c\u627e\u5230 IO \u4e8b\u4ef6\u5df2\u7ecf\u5230\u8fbe\u7684 Channel \u6267\u884c\u3002<\/p>\n
                            \u56e0\u4e3a\u521b\u5efa\u548c\u5207\u6362\u7ebf\u7a0b\u7684\u5f00\u9500\u5f88\u5927\uff0c\u56e0\u6b64\u4f7f\u7528\u4e00\u4e2a\u7ebf\u7a0b\u6765\u5904\u7406\u591a\u4e2a\u4e8b\u4ef6\u800c\u4e0d\u662f\u4e00\u4e2a\u7ebf\u7a0b\u5904\u7406\u4e00\u4e2a\u4e8b\u4ef6\uff0c\u5bf9\u4e8e IO \u5bc6\u96c6\u578b\u7684\u5e94\u7528\u5177\u6709\u5f88\u597d\u5730\u6027\u80fd\u3002\u5e94\u8be5\u6ce8\u610f\u7684\u662f\uff0c\u53ea\u6709\u5957\u63a5\u5b57 Channel \u624d\u80fd\u914d\u7f6e\u4e3a\u975e\u963b\u585e\uff0c\u800c FileChannel \u4e0d\u80fd\uff0c\u4e3a FileChannel \u914d\u7f6e\u975e\u963b\u585e\u4e5f\u6ca1\u6709\u610f\u4e49\u3002<\/p>\n
                            \u52a8\u624b\u5b9e\u73b0 NIO<\/span><\/h3>\n
                            \u597d\u4e86\uff0c\u6709\u4e86\u4e0a\u8fb9\u7684\u57fa\u672c\u6982\u5ff5\u540e\uff0c\u6211\u4eec\u6765\u5b9e\u73b0\u5c31\u6709\u4e86\u601d\u8def\u4e86~, \u540c\u6837\u7684\uff0c\u6211\u4eec\u5148\u5b9e\u73b0\u4e00\u4e2a\u5ba2\u6237\u7aef<\/code><\/p>\n
                            <\/span>\/\/ \u5ba2\u6237\u7aef<\/span>
                            \/\/ \u5ba2\u6237\u7aef\u4e3b\u8981\u5c31\u662fsocket\uff0c nio\u4e3b\u8981\u7528\u4e8e\u670d\u52a1\u7aef\u7684\u4e00\u79cd\u901a\u4fe1\u6a21\u5f0f<\/span>
                              public<\/span> static<\/span> void<\/span> nioClient<\/span>()<\/span> throws<\/span> IOException, InterruptedException <\/span>{
                                  Socket socket = new<\/span> Socket(\"127.0.0.1\"<\/span>, 8000<\/span>);
                                  OutputStream outputStream = socket.getOutputStream();
                                  DataOutputStream out = new<\/span> DataOutputStream(outputStream);

                                  \/\/ \u4e3a\u4e86\u6d4b\u8bd5 - \u53ea\u5199\u6570\u636e<\/span>
                                  int<\/span> i = 1<\/span>;
                                  while<\/span>(i > 0<\/span>) {
                                      out.writeUTF(\"client send num:\"<\/span> + i);
                                      i --;
                                      Thread.sleep(3000<\/span>);
                                      Log.info(\"send data ok\"<\/span>);
                                  }

                                  socket.close();
                              }
                            <\/code><\/pre>\n
                            \u91cd\u70b9\u5728\u670d\u52a1\u7aef:<\/p>\n
                            <\/span> public<\/span> static<\/span> void<\/span> noiServer<\/span>()<\/span> throws<\/span> IOException <\/span>{
                                  \/\/ 1. \u521b\u5efa\u9009\u62e9\u5668<\/span>
                                  Selector selector = Selector.open();

                                  \/\/ 2. \u5c06\u901a\u9053\u6ce8\u518c\u5230\u9009\u62e9\u5668\u4e0a<\/span>
                                  ServerSocketChannel serverSocketChannel = ServerSocketChannel.open();
                                  serverSocketChannel.configureBlocking(false<\/span>);
                                  serverSocketChannel.register(selector, SelectionKey.OP_ACCEPT);

                                  \/\/ \u83b7\u53d6socket \u7ed1\u5b9a\u76d1\u542c<\/span>
                                  ServerSocket serverSocket = serverSocketChannel.socket();
                                  InetSocketAddress address = new<\/span> InetSocketAddress(\"127.0.0.1\"<\/span>, 8000<\/span>);
                                  serverSocket.bind(address);
                                  Log.info(\"\u76d1\u542c\u6570\u636e\uff1a\"<\/span> + 8000<\/span>);

                                  \/\/ \u5faa\u73af\u76d1\u542c\u4e8b\u4ef6<\/span>
                                  while<\/span>(true<\/span>) {
                                      selector.select();

                                      Set<SelectionKey> keys = selector.selectedKeys();
                                      Iterator<SelectionKey> keyIterator = keys.iterator();

                                      while<\/span>(keyIterator.hasNext()) {
                                          SelectionKey key = keyIterator.next();

                                          if<\/span>(key.isAcceptable()) {
                                              ServerSocketChannel ssChannel = (ServerSocketChannel) key.channel();

                                              \/\/ \u670d\u52a1\u5668\u4e3a\u6bcf\u4e00\u4e2a\u65b0\u7684\u94fe\u63a5\u521b\u5efa\u4e00\u4e2achannel<\/span>
                                              SocketChannel sChannel = ssChannel.accept();
                                              sChannel.configureBlocking(false<\/span>);

                                              \/\/ \u8fd9\u4e2a\u65b0\u94fe\u63a5\u7528\u4e8e\u4ece\u5ba2\u6237\u7aef\u8bfb\u53d6\u6570\u636e - \u8bfb<\/span>
                                              sChannel.register(selector, SelectionKey.OP_READ);
                                          }else<\/span> if<\/span>(key.isReadable()) {
                                              \/\/ \u83b7\u53d6\u8bfb\u4e8b\u4ef6<\/span>
                                              SocketChannel readChannel = (SocketChannel) key.channel();

                                              \/**
                                              * \u8bfb\u53d6\u6570\u636e
                                              *  1. \u521b\u5efa\u7f13\u51b2\u533a
                                              *  2. \u8bfb\u53d6channel\u7684\u6570\u636e
                                              *  3. \u8fd4\u56de\u6570\u636e
                                              *\/<\/span>
                                              ByteBuffer buffer = ByteBuffer.allocate(1024<\/span>);
                                              StringBuilder data = new<\/span> StringBuilder();

                                              \/\/ \u5982\u679c\u901a\u9053\u4e00\u76f4\u6709\u6570\u636e\u4ea7\u751f\uff0c \u5faa\u73af\u4f1a\u4e00\u76f4\u6267\u884c\uff0c \u76f4\u5230\u7ed3\u675f<\/span>
                                              while<\/span>(true<\/span>) {
                                                  \/\/ \u5148\u6e05\u4e00\u4e0b\u7f13\u51b2\u533a<\/span>
                                                  buffer.clear();
                                                  int<\/span> cnt = readChannel.read(buffer);
                                                  if<\/span>(cnt == -1<\/span>)
                                                      break<\/span>;

                                                  \/\/ \u8f6c\u6362\u4e3a\u5199<\/span>
                                                  buffer.flip();
                                                  int<\/span> limit = buffer.limit();
                                                  char<\/span>[] chr = new<\/span> char<\/span>[limit];
                                                  for<\/span>(int<\/span> i = 0<\/span>;i < limit; i ++) {
                                                      chr[i] = (char<\/span>) buffer.get(i);
                                                      Log.info(\"char [i] -----> \"<\/span> + chr[i]);
                                                  }

                                                  data.append(chr);
                                                  buffer.clear();
                                              }

                                              \/\/\"get client: u0000\"<\/span>
                                              \/\/ byte\u7a7a\u6570\u7ec4\u4e2d\u4f1a\u5305\u542b\u7a7a\u683c \u8fd9\u91cc\u8f6c\u5316\u4e00\u4e0b<\/span>
                                              String res = data.toString().replaceAll(\"([\\u0000]*)\"<\/span>, \"\"<\/span>);
                                              Log.info(\"get client: \"<\/span> + res + \"n\"<\/span>);
                                              if<\/span>(res.equals(\"get client: client send num:1\"<\/span>)) {
                                                  Log.info(\"equal\"<\/span>);  \/\/ \"get client: u0000u0011client send num:1\"  u0000 \u8868\u793a\u7a7a\u683c<\/span>
                                              }
                                              \/\/ \u5173\u95ed\u901a\u9053<\/span>
                                              readChannel.close();
                                          }

                                          \/\/ \u6d88\u8d39\u5b8c\u6210\u540e\u79fb\u9664\u6389<\/span>
                                          keyIterator.remove();
                                      }
                                  }
                              }
                            <\/code><\/pre>\n
                            \u76f8\u5173\u6ce8\u91ca\u5462\uff0c\u90fd\u5728\u4ee3\u7801\u4f53\u73b0\u4e86\uff0c\u8fd9\u91cc\u6765\u603b\u7ed3\u4e3b\u8981\u505a\u4e86\u54ea\u4e9b\u4e8b:<\/p>\n
                              \n
                            • \n
                              \u521b\u5efa\u9009\u62e9\u5668<\/section>\n<\/li>\n
                            • \n
                              \u5c06\u901a\u9053\u6ce8\u518c\u5230\u9009\u62e9\u5668\u4e0a<\/section>\n<\/li>\n
                            • \n
                              \u76d1\u542c\u4e8b\u4ef6<\/section>\n<\/li>\n
                            • \n
                              \u83b7\u53d6\u5230\u8fbe\u7684\u4e8b\u4ef6<\/section>\n<\/li>\n
                            • \n
                              \u4e8b\u4ef6\u5faa\u73af<\/section>\n<\/li>\n<\/ul>\n
                              \u7ed3\u675f\u8bed<\/span><\/h2>\n
                              \u5199\u5230\u8fd9\u91cc\uff0c\u672c\u8282\u6587\u7ae0\u5c31\u5230\u6b64\u7ed3\u675f\u4e86\uff0c\u6574\u4f53\u770b\u4e0b\u6765\uff0c\u6587\u7ae0\u7bc7\u5e45\u8f83\u957f\uff0c\u5efa\u8bae\u6536\u85cf\u89c2\u770b\uff0c\u5982\u679c\u89c9\u5f97\u5199\u7684\u4e0d\u9519\uff0c\u7528\u4f60\u53d1\u8d22\u7684\u5c0f\u624b\u5e2e\u6211\u70b9\u4e2a\u8d5e\u5457 ?~<\/p>\n