{"id":4145,"date":"2024-05-24T08:01:48","date_gmt":"2024-05-24T00:01:48","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/index.php\/%e9%9d%a2%e8%af%95\/%e9%9d%a2%e8%af%95%e5%ae%98%ef%bc%9a%e4%bd%a0%e5%8f%af%e4%bb%a5%e7%9b%b4%e6%8e%a5%e7%bc%96%e5%86%99%e6%88%96%e4%bf%ae%e6%94%b9java%e5%ad%97%e8%8a%82%e7%a0%81%e5%90%97%ef%bc%9f%e5%a6%82%e6%9e%9c\/"},"modified":"2024-08-02T16:55:22","modified_gmt":"2024-08-02T08:55:22","slug":"%e9%9d%a2%e8%af%95%e5%ae%98%ef%bc%9a%e4%bd%a0%e5%8f%af%e4%bb%a5%e7%9b%b4%e6%8e%a5%e7%bc%96%e5%86%99%e6%88%96%e4%bf%ae%e6%94%b9java%e5%ad%97%e8%8a%82%e7%a0%81%e5%90%97%ef%bc%9f%e5%a6%82%e6%9e%9c","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/%e9%9d%a2%e8%af%95\/%e9%9d%a2%e8%af%95%e5%ae%98%ef%bc%9a%e4%bd%a0%e5%8f%af%e4%bb%a5%e7%9b%b4%e6%8e%a5%e7%bc%96%e5%86%99%e6%88%96%e4%bf%ae%e6%94%b9java%e5%ad%97%e8%8a%82%e7%a0%81%e5%90%97%ef%bc%9f%e5%a6%82%e6%9e%9c\/","title":{"rendered":"\u9762\u8bd5\u5b98\uff1a\u4f60\u53ef\u4ee5\u76f4\u63a5\u7f16\u5199\u6216\u4fee\u6539Java\u5b57\u8282\u7801\u5417\uff1f\u5982\u679c\u53ef\u4ee5\uff0c\u5e94\u7528\u573a\u666f\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"
\n

\u53ef\u4ee5\u76f4\u63a5\u7f16\u5199\u6216\u4fee\u6539Java\u5b57\u8282\u7801\uff0c\u867d\u7136\u8fd9\u4e0d\u662f\u65e5\u5e38\u5f00\u53d1\u7684\u5e38\u89c4\u505a\u6cd5\u3002\u8fd9\u901a\u5e38\u6d89\u53ca\u5230\u4f7f\u7528\u67d0\u4e9b\u7279\u5b9a\u7684\u5de5\u5177\u6216\u5e93\uff0c\u5982ASM\u3001ByteBuddy\u3001CGLib\u6216Javassist\uff0c\u8fd9\u4e9b\u5de5\u5177\u80fd\u591f\u5728\u8fd0\u884c\u65f6\u6216\u7f16\u8bd1\u540e\u9636\u6bb5\u64cd\u4f5c\u5b57\u8282\u7801\u3002<\/span><\/p>\n

<\/h3>\n

\u5e94\u7528\u573a\u666f<\/span><\/strong><\/h3>\n
    \n
  1. \n

    \u6027\u80fd\u4f18\u5316<\/span><\/strong>\uff1a\u76f4\u63a5\u64cd\u4f5c\u5b57\u8282\u7801\u53ef\u80fd\u4f1a\u63d0\u9ad8\u7a0b\u5e8f\u6267\u884c\u6548\u7387\uff0c\u56e0\u4e3a\u4f60\u53ef\u4ee5\u7ed5\u8fc7\u4e00\u4e9b\u9ad8\u7ea7\u8bed\u8a00\u7684\u62bd\u8c61\uff0c\u76f4\u63a5\u8fdb\u884c\u4f18\u5316\u3002<\/span><\/p>\n<\/li>\n

  2. \n
    \u6846\u67b6\u5f00\u53d1<\/span><\/strong>\uff1a\u8bb8\u591a\u6d41\u884c\u7684Java\u6846\u67b6\uff0c\u5982Spring\u6216Hibernate\uff0c\u4f7f\u7528\u5b57\u8282\u7801\u64cd\u7eb5\u6280\u672f\u6765\u6269\u5c55\u5e94\u7528\u7a0b\u5e8f\u7684\u529f\u80fd\uff0c\u4f8b\u5982\u52a8\u6001\u4ee3\u7406\u3001\u5ef6\u8fdf\u52a0\u8f7d\u7b49\u3002<\/span><\/section>\n<\/li>\n
  3. \n
    AOP\uff08\u9762\u5411\u5207\u9762\u7f16\u7a0b\uff09<\/span><\/strong>\uff1a\u50cfAspectJ\u8fd9\u6837\u7684\u5e93\u901a\u8fc7\u4fee\u6539\u5b57\u8282\u7801\u6765\u6ce8\u5165\u6a2a\u5207\u5173\u6ce8\u70b9\uff08\u5982\u65e5\u5fd7\u8bb0\u5f55\u3001\u6027\u80fd\u76d1\u89c6\uff09\uff0c\u800c\u65e0\u9700\u4fee\u6539\u73b0\u6709\u6e90\u4ee3\u7801\u3002<\/span><\/section>\n<\/li>\n
  4. \n
    \u4ee3\u7801\u5206\u6790\u548c\u6d4b\u8bd5<\/span><\/strong>\uff1a\u53ef\u4ee5\u5728\u5b57\u8282\u7801\u4e2d\u63d2\u5165\u989d\u5916\u7684\u76d1\u63a7\u6216\u68c0\u6d4b\u903b\u8f91\u6765\u6536\u96c6\u6d4b\u8bd5\u8986\u76d6\u7387\u6570\u636e\u6216\u8fdb\u884c\u8fd0\u884c\u65f6\u5206\u6790\u3002<\/span><\/section>\n<\/li>\n
  5. \n
    \u5b89\u5168\u5ba1\u8ba1<\/span><\/strong>\uff1a\u901a\u8fc7\u5ba1\u67e5\u548c\u66f4\u6539\u5b57\u8282\u7801\u4ee5\u786e\u4fdd\u5b89\u5168\u6027\uff0c\u6bd4\u5982\u79fb\u9664\u4e0d\u5b89\u5168\u7684\u4ee3\u7801\u7247\u6bb5\uff0c\u52a0\u56fa\u4ee3\u7801\u5bf9\u6297\u9006\u5411\u5de5\u7a0b\u3002<\/span><\/section>\n<\/li>\n
  6. \n
    \u70ed\u4fee\u8865\uff08Hot Patching\uff09<\/strong>\uff1a\u5728\u8fd0\u884c\u65f6\u4fee\u590d\u5df2\u90e8\u7f72\u5e94\u7528\u7a0b\u5e8f\u7684\u7c7b\uff0c\u800c\u65e0\u9700\u505c\u673a\u3002<\/span><\/section>\n<\/li>\n<\/ol>\n

    \u4e3e\u4f8b\u8bf4\u660e<\/span><\/strong><\/h3>\n
    \u5047\u8bbe\u6211\u4eec\u60f3\u8981\u901a\u8fc7\u5b57\u8282\u7801\u64cd\u7eb5\uff0c\u5728\u6bcf\u4e2a\u65b9\u6cd5\u7684\u5f00\u59cb\u548c\u7ed3\u675f\u5904\u6dfb\u52a0\u65e5\u5fd7\u8bb0\u5f55\u529f\u80fd\uff0c\u4f46\u53c8\u4e0d\u60f3\u5728\u6e90\u7801\u4e2d\u663e\u5f0f\u7f16\u8f91\u6bcf\u4e2a\u65b9\u6cd5\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528ASM\u5e93\u6765\u5b9e\u73b0\u8fd9\u4e2a\u76ee\u6807\uff1a<\/span><\/section>\n

    \u9996\u5148\uff0c\u5b9a\u4e49\u4e00\u4e2aClassVisitor\uff0c\u91cd\u5199visitMethod\u65b9\u6cd5\uff0c\u5728\u5176\u4e2d\u8fdb\u4e00\u6b65\u5b9a\u4e49MethodVisitor\uff1a<\/span><\/p>\n

    \n
    \n
    import org.objectweb.asm.*;\n\npublic class AddLoggingClassAdapter extends ClassVisitor {\n    public AddLoggingClassAdapter(ClassVisitor cv) {\n        super(Opcodes.ASM7, cv);\n    }\n\n    @Override\n    public MethodVisitor visitMethod(int access, String name, String descriptor, String signature, String[] exceptions) {\n        MethodVisitor mv = cv.visitMethod(access, name, descriptor, signature, exceptions);\n        \/\/ \u4e3a\u65b9\u6cd5\u6dfb\u52a0\u65b0\u7684MethodVisitor\u88c5\u9970\u5668\uff0c\u4ee5\u4fbf\u4fee\u6539\u65b9\u6cd5 \n        return new AddLoggingMethodAdapter(Opcodes.ASM7, mv, access, name, descriptor);\n    }\n}<\/pre>\n<\/div>\n<\/section>\n
    \u7136\u540e\uff0c\u5b9a\u4e49AddLoggingMethodAdapter\uff0c\u5728\u65b9\u6cd5\u8fdb\u5165\u548c\u9000\u51fa\u5904\u63d2\u5165\u65e5\u5fd7\u8bb0\u5f55\uff1a<\/span><\/p>\n
    \n
    \n
    import org.objectweb.asm.commons.AdviceAdapter;\n\npublic class AddLoggingMethodAdapter extends AdviceAdapter {\n    private String methodName;\n\n    protected AddLoggingMethodAdapter(int api, MethodVisitor mv, int access, String name, String descriptor) {\n        super(api, mv, access, name, descriptor);\n        this.methodName = name;\n    }\n\n    @Override\n    protected void onMethodEnter() {\n        \/\/ \u5728\u65b9\u6cd5\u8fdb\u5165\u65f6\u63d2\u5165\u65e5\u5fd7 mv.visitFieldInsn(GETSTATIC, \"java\/lang\/System\", \"out\", \"Ljava\/io\/PrintStream;\"); \n        \/\/ mv.visitLdcInsn(\"Entering method: \" + methodName); \n        \/\/ mv.visitMethodInsn(INVOKEVIRTUAL, \"java\/io\/PrintStream\", \"println\", \"(Ljava\/lang\/String;)V\", false); \n    }\n\n    @Override\n    protected void onMethodExit(int opcode) {\n        \/\/ \u65b9\u6cd5\u9000\u51fa\u65f6\u63d2\u5165\u65e5\u5fd7\uff0c\u5305\u62ec\u5f02\u5e38\u9000\u51fa mv.visitFieldInsn(GETSTATIC, \n        \/\/ \"java\/lang\/System\", \"out\", \"Ljava\/io\/PrintStream;\"); mv.visitLdcInsn(\"Exiting method: \" + methodName); \n        \/\/ mv.visitMethodInsn(INVOKEVIRTUAL, \"java\/io\/PrintStream\", \"println\", \"(Ljava\/lang\/String;)V\", false);\n    }\n}<\/pre>\n<\/div>\n<\/section>\n
    \u6700\u540e\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528AddLoggingClassAdapter\u6765\u5904\u7406\u539f\u59cb\u7684.class\u6587\u4ef6\uff0c\u5e76\u5c06\u5176\u5199\u56de\u65b0\u7684.class\u6587\u4ef6\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u6d89\u53ca\u8bfb\u53d6\u5b57\u8282\u7801\u3001\u4f7f\u7528\u9002\u914d\u5668\u8fdb\u884c\u8f6c\u6362\u3001\u7136\u540e\u5199\u56de\u6587\u4ef6\uff0c\u5b9e\u73b0\u8fd9\u4e00\u8fc7\u7a0b\u7684\u4ee3\u7801\u5927\u81f4\u5982\u4e0b\uff1a<\/span><\/p>\n
    \n
    \n
    import org.objectweb.asm.ClassReader;\nimport org.objectweb.asm.ClassWriter;\n\nimport java.io.FileOutputStream;\nimport java.io.InputStream;\n\npublic class LogInjector {\n    public static void main(String[] args) throws Exception {\n        InputStream in = LogInjector.class.getResourceAsStream(\"\/YourClass.class\");\n        ClassReader classReader = new ClassReader(in);\n        ClassWriter classWriter = new ClassWriter(classReader, 0);\n        \/\/ \u4f7f\u7528\u81ea\u5b9a\u4e49\u7684ClassVisitor\u88c5\u9970\u7c7b\u8bfb\u53d6\u5668 \n        ClassVisitor visitor = new AddLoggingClassAdapter(classWriter);\n        classReader.accept(visitor, 0);\n        byte[] modifiedClassBytes = classWriter.toByteArray();\n        \/\/ \u5c06\u4fee\u6539\u540e\u7684\u7c7b\u5b57\u8282\u7801\u5199\u56de\u4e00\u4e2a\u65b0\u7684.class\u6587\u4ef6 \n        FileOutputStream out = new FileOutputStream(\"YourClassModified.class\");\n        out.write(modifiedClassBytes);\n        out.close();\n    }\n}<\/pre>\n<\/div>\n<\/section>\n
    \u8bf7\u6ce8\u610f\uff0c\u5177\u4f53\u7684\u5b57\u8282\u7801\u64cd\u4f5c\u7ec6\u8282\u53ef\u80fd\u975e\u5e38\u590d\u6742\uff0c\u800c\u793a\u4f8b\u4ee3\u7801\u53ea\u662f\u4e3a\u4e86\u63d0\u4f9b\u4e00\u4e2a\u57fa\u672c\u7684\u4ecb\u7ecd\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u8fd8\u9700\u8981\u8003\u8651\u8bf8\u5982\u7ebf\u7a0b\u5b89\u5168\u3001\u6027\u80fd\u5f71\u54cd\u548c\u517c\u5bb9\u6027\u7b49\u95ee\u9898\u3002<\/span><\/p>\n
    \n
    \u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8e\u5fae\u4fe1\u516c\u4f17\u53f7: \u4e92\u8054\u7f51\u9762\u8bd5\u5c0f\u5e2e\u624b<\/p><\/blockquote>\n<\/div>\n","raw":"","protected":false},"excerpt":{"rendered":"
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