{"id":4120,"date":"2024-04-14T09:00:26","date_gmt":"2024-04-14T01:00:26","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/index.php\/%e9%9d%a2%e8%af%95\/%e9%9d%a2%e8%af%95%e5%ae%98-%e4%b8%ba%e4%bb%80%e4%b9%88-threadlocal-%e5%8f%af%e4%bb%a5%e5%81%9a%e5%88%b0%e7%ba%bf%e7%a8%8b%e9%9a%94%e7%a6%bb%ef%bc%9f\/"},"modified":"2024-04-14T09:00:26","modified_gmt":"2024-04-14T01:00:26","slug":"%e9%9d%a2%e8%af%95%e5%ae%98-%e4%b8%ba%e4%bb%80%e4%b9%88-threadlocal-%e5%8f%af%e4%bb%a5%e5%81%9a%e5%88%b0%e7%ba%bf%e7%a8%8b%e9%9a%94%e7%a6%bb%ef%bc%9f","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-%e4%b8%ba%e4%bb%80%e4%b9%88-threadlocal-%e5%8f%af%e4%bb%a5%e5%81%9a%e5%88%b0%e7%ba%bf%e7%a8%8b%e9%9a%94%e7%a6%bb%ef%bc%9f\/","title":{"rendered":"\u9762\u8bd5\u5b98-\u4e3a\u4ec0\u4e48 ThreadLocal \u53ef\u4ee5\u505a\u5230\u7ebf\u7a0b\u9694\u79bb\uff1f"},"content":{"rendered":"
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ThreadLocal \u7684\u539f\u7406<\/span><\/p>\n

ThreadLocal \u662f\u4e00\u79cd Java \u7c7b\uff0c\u5b83\u4e3a\u6bcf\u4e2a\u7ebf\u7a0b\u63d0\u4f9b\u4e86\u4e00\u4e2a\u72ec\u7acb\u7684\u5b58\u50a8\u533a\u57df\uff0c\u8be5\u533a\u57df\u53ef\u4ee5\u5b58\u50a8\u7279\u5b9a\u4e8e\u8be5\u7ebf\u7a0b\u7684\u6570\u636e\u3002\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u6709\u81ea\u5df1\u4e13\u5c5e\u7684 <\/span>ThreadLocalMap<\/span>\uff0c\u5176\u4e2d\u5b58\u50a8\u4e86\u4e0e\u8be5\u7ebf\u7a0b\u5173\u8054\u7684\u6240\u6709 ThreadLocal \u5bf9\u8c61\u3002<\/span><\/p>\n

\u5b9e\u73b0\u7ebf\u7a0b\u9694\u79bb<\/span><\/p>\n

ThreadLocal \u5b9e\u73b0\u7ebf\u7a0b\u9694\u79bb\u662f\u901a\u8fc7\u4ee5\u4e0b\u673a\u5236\uff1a<\/span><\/p>\n

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  1. \n

    \u6bcf\u4e2a\u7ebf\u7a0b\u4e00\u4e2a ThreadLocalMap\uff1a\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u62e5\u6709\u81ea\u5df1\u7684 ThreadLocalMap\uff0c\u8be5\u6620\u5c04\u5c06 ThreadLocal \u5bf9\u8c61\u4e0e\u5b83\u5b58\u50a8\u7684\u6570\u636e\u5173\u8054\u8d77\u6765\u3002<\/span><\/p>\n<\/li>\n

  2. \n

    ThreadLocal \u4f5c\u4e3a key\uff1aThreadLocal \u5bf9\u8c61\u672c\u8eab\u7528\u4f5c ThreadLocalMap \u4e2d\u7684 key\u3002<\/span><\/p>\n<\/li>\n

  3. \n

    \u7ebf\u7a0b\u9694\u79bb\u5b58\u50a8\uff1a\u7531\u4e8e\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u6709\u81ea\u5df1\u4e13\u5c5e\u7684 ThreadLocalMap\uff0c\u56e0\u6b64\u5b58\u50a8\u5728 ThreadLocal \u4e2d\u7684\u6570\u636e\u4e0e\u5176\u4ed6\u7ebf\u7a0b\u9694\u79bb\u3002<\/span><\/p>\n<\/li>\n<\/ol>\n

    \u7ebf\u7a0b\u9694\u79bb\u793a\u4f8b<\/span><\/p>\n

    \u4ee5\u4e0b\u793a\u4f8b\u6f14\u793a\u4e86 ThreadLocal \u5982\u4f55\u5b9e\u73b0\u7ebf\u7a0b\u9694\u79bb\uff1a<\/span><\/p>\n

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      public<\/span> class<\/span> ThreadLocalExample<\/span> {<\/span><\/code><\/span><\/code>    private<\/span> static<\/span> ThreadLocal<Integer> threadLocal = new<\/span> ThreadLocal<>();<\/span><\/code><\/span><\/code>    public<\/span> static<\/span> void<\/span> main<\/span>(String[] args<\/span>)<\/span> {<\/span><\/code>        \/\/ \u7ebf\u7a0b 1<\/span><\/span><\/code>        new<\/span> Thread(() -> {<\/span><\/code>            threadLocal.set<\/span>(10<\/span>); \/\/ \u8bbe\u7f6e\u8be5\u7ebf\u7a0b\u7684 ThreadLocal \u503c\u4e3a 10<\/span><\/span><\/code>        }).start();<\/span><\/code><\/span><\/code>        \/\/ \u7ebf\u7a0b 2<\/span><\/span><\/code>        new<\/span> Thread(() -> {<\/span><\/code>            threadLocal.set<\/span>(20<\/span>); \/\/ \u8bbe\u7f6e\u8be5\u7ebf\u7a0b\u7684 ThreadLocal \u503c\u4e3a 20<\/span><\/span><\/code>        }).start();<\/span><\/code><\/span><\/code>        \/\/ \u4e3b\u7ebf\u7a0b<\/span><\/span><\/code>        System.out<\/span>.println(threadLocal.get<\/span>()); \/\/ \u6253\u5370 null\uff0c\u56e0\u4e3a\u4e3b\u7ebf\u7a0b\u6ca1\u6709\u8bbe\u7f6e ThreadLocal \u503c<\/span><\/span><\/code>    }<\/span><\/code>}<\/span><\/code><\/pre>\n<\/section>\n
      \u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff1a<\/span><\/p>\n
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        \u4e3b\u7ebf\u7a0b\u4e3a ThreadLocal \u5bf9\u8c61\u8bbe\u7f6e\u4e86\u503c\uff0c\u4f46\u8fd9\u4e0d\u4f1a\u5f71\u54cd\u5176\u4ed6\u7ebf\u7a0b\u3002<\/span><\/p>\n<\/li>\n
      • \n
        \u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u6709\u81ea\u5df1\u4e13\u5c5e\u7684 ThreadLocalMap\uff0c\u5176\u4e2d\u5b58\u50a8\u4e86\u8be5\u7ebf\u7a0b\u7684 ThreadLocal \u503c\u3002<\/span><\/p>\n<\/li>\n
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        \u56e0\u6b64\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u90fd\u53ef\u4ee5\u8bbf\u95ee\u5176\u81ea\u5df1\u7684 ThreadLocal \u503c\uff0c\u800c\u4e0d\u4f1a\u53d7\u5230\u5176\u4ed6\u7ebf\u7a0b\u7684\u5f71\u54cd\uff0c\u5b9e\u73b0\u4e86\u7ebf\u7a0b\u9694\u79bb\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n
        \u4f18\u70b9\u548c\u5c40\u9650\u6027<\/span><\/p>\n
        \u4f18\u70b9\uff1a<\/span><\/p>\n
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          \u8f7b\u677e\u5b9e\u73b0\u7ebf\u7a0b\u9694\u79bb\uff0c\u907f\u514d\u6570\u636e\u7ade\u4e89\u3002<\/span><\/p>\n<\/li>\n
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          \u907f\u514d\u4f7f\u7528\u540c\u6b65\u673a\u5236\uff08\u5982\u9501\uff09\u6765\u4fdd\u62a4\u6570\u636e\u3002<\/span><\/p>\n<\/li>\n
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          \u9002\u7528\u4e8e\u5b58\u50a8\u6bcf\u4e2a\u7ebf\u7a0b\u6240\u9700\u7684\u7279\u5b9a\u6570\u636e\uff0c\u800c\u4e0d\u9700\u8981\u989d\u5916\u7684\u5bf9\u8c61\u5f00\u9500\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n
          \u5c40\u9650\u6027\uff1a<\/span><\/p>\n
            \n
          • \n
            ThreadLocal \u5b58\u50a8\u7684\u6570\u636e\u5728\u5783\u573e\u56de\u6536\u65f6\u65e0\u6cd5\u56de\u6536\u3002<\/span><\/p>\n<\/li>\n
          • \n
            \u7ef4\u62a4 ThreadLocalMap \u4f1a\u4ea7\u751f\u989d\u5916\u7684\u7a7a\u95f4\u5f00\u9500\u3002<\/span><\/p>\n<\/li>\n
          • \n
            \u5982\u679c\u4f7f\u7528\u4e0d\u5f53\uff0c\u53ef\u80fd\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002<\/span><\/p>\n<\/li>\n
          • \n
            <\/span><\/p>\n<\/li>\n<\/ul>\n
            <\/figure>\n
            <\/mp-style-type><\/p>\n
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            \u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8e\u5fae\u4fe1\u516c\u4f17\u53f7:                 \u4e92\u8054\u7f51\u9762\u8bd5\u5c0f\u5e2e\u624b              <\/p>\n<\/blockquote>\n<\/div>\n","raw":"","protected":false},"excerpt":{"rendered":"
            ThreadLocal \u7684\u539f\u7406 ThreadLocal \u662f\u4e00\u79cd Java \u7c7b\uff0c\u5b83\u4e3a\u6bcf\u4e2a\u7ebf\u7a0b\u63d0\u4f9b\u4e86\u4e00\u4e2a\u72ec\u7acb\u7684\u5b58\u50a8\u533a\u57df\uff0c\u8be5\u533a\u57df\u53ef\u4ee5\u5b58\u50a8 …<\/p>\n","protected":false},"author":1,"featured_media":4117,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[30],"tags":[],"class_list":["post-4120","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-30"],"post_thumbnail_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145308903-150x150.jpeg","content_first_image":null,"post_medium_image_300":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145308903-300x128.jpeg","post_thumbnail_image_624":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145308903-1024x435.jpeg","post_frist_image":null,"post_medium_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145308903-300x128.jpeg","post_large_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145308903-1024x435.jpeg","post_full_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145308903.jpeg","post_all_images":[],"videoAdId":"","listAd":"0","listAdId":"","listAdEvery":6,"total_comments":0,"category_name":"\u9762\u8bd5","post_date":"2024-04-14","like_count":"0","praiseWord":"\u9f13\u52b1","copyright_state":"","excitationAd":"0","rewardedVideoAdId":"","detailAdId":"","detailAd":"0","enterpriseMinapp":"0","audios":[],"postImageUrl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230519082947553.jpg","avatarurls":[],"related_posts":null,"pageviews":383,"next_post_id":4116,"next_post_title":"\u9762\u8bd5\u5b98-\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\uff0cHashMap \u4e3a\u4ec0\u4e48\u4f1a\u51fa\u73b0\u6b7b\u5faa\u73af\uff1f","previous_post_id":4575,"previous_post_title":"JAVA\u90fd\u8fd9\u4e48\u5377\u4e86\uff0cMySQL\u7d22\u5f15\u4f60\u8fd8\u4e0d\u4e86\u89e3\u5417\uff1f\u4e00\u6587\u5e26\u4f60\u719f\u6089MySQL\u7d22\u5f15\u3002","_links":{"self":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/4120","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/comments?post=4120"}],"version-history":[{"count":0,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/4120\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media\/4117"}],"wp:attachment":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media?parent=4120"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/categories?post=4120"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/tags?post=4120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}