{"id":4108,"date":"2024-04-17T08:32:56","date_gmt":"2024-04-17T00:32:56","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%9ajava%e4%b8%adthreadlocal%e4%b8%ba%e4%bb%80%e4%b9%88%e4%bc%9a%e5%8f%91%e7%94%9f%e5%86%85%e5%ad%98%e6%b3%84%e6%bc%8f%ef%bc%9f\/"},"modified":"2024-04-17T08:32:56","modified_gmt":"2024-04-17T00:32:56","slug":"%e9%9d%a2%e8%af%95%e5%ae%98%ef%bc%9ajava%e4%b8%adthreadlocal%e4%b8%ba%e4%bb%80%e4%b9%88%e4%bc%9a%e5%8f%91%e7%94%9f%e5%86%85%e5%ad%98%e6%b3%84%e6%bc%8f%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%ef%bc%9ajava%e4%b8%adthreadlocal%e4%b8%ba%e4%bb%80%e4%b9%88%e4%bc%9a%e5%8f%91%e7%94%9f%e5%86%85%e5%ad%98%e6%b3%84%e6%bc%8f%ef%bc%9f\/","title":{"rendered":"\u9762\u8bd5\u5b98\uff1aJava\u4e2dThreadLocal\u4e3a\u4ec0\u4e48\u4f1a\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\uff1f"},"content":{"rendered":"
\n

ThreadLocal\u5185\u5b58\u6cc4\u6f0f\u7684\u6838\u5fc3\u539f\u56e0\u5728\u4e8e\u5176\u4f7f\u7528\u4e86Thread\u7c7b\u4e2d\u7684ThreadLocal.ThreadLocalMap\u6570\u636e\u7ed3\u6784\uff0c\u800c\u8fd9\u4e2a\u6570\u636e\u7ed3\u6784\u7684\u751f\u547d\u5468\u671f\u4e0e\u7ebf\u7a0b\u4e00\u81f4\u3002\u7406\u89e3\u8fd9\u79cd\u6cc4\u6f0f\u9996\u5148\u9700\u8981\u4e86\u89e3ThreadLocal\u548cThreadLocalMap\u7684\u5de5\u4f5c\u539f\u7406\u3002<\/p>\n

ThreadLocal \u5de5\u4f5c\u539f\u7406\uff1a<\/span><\/p>\n

    \n
  1. \n

    ThreadLocal\u5bf9\u8c61\u672c\u8eab<\/span>\uff1a\u5f53\u4f60\u521b\u5efa\u4e00\u4e2aThreadLocal\u53d8\u91cf\u65f6\uff0c\u5e76\u4e0d\u662f\u4e3a\u6bcf\u4e2a\u7ebf\u7a0b\u5404\u81ea\u5b58\u50a8\u4e00\u4e2a\u72ec\u7acb\u7684\u503c\uff0c\u800c\u662f\u63d0\u4f9b\u4e00\u4e2a\u8bbf\u95ee\u8be5\u7ebf\u7a0b\u5c40\u90e8\u53d8\u91cf\u7684\u952e\u3002<\/span><\/p>\n<\/li>\n

  2. \n

    ThreadLocal.ThreadLocalMap<\/span>\uff1a\u5b9e\u9645\u7684\u503c\u50a8\u5b58\u5728\u6bcf\u4e2a\u7ebf\u7a0b\u7684ThreadLocalMap\u4e2d\uff0c\u8fd9\u662f\u4e00\u4e2a\u7279\u6b8a\u7c7b\u578b\u7684\u6620\u5c04\uff0c\u53ea\u6709\u7ebf\u7a0b\u81ea\u5df1\u80fd\u8bbf\u95ee\u3002\u952e\u662fThreadLocal\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u503c\u662f\u7ebf\u7a0b\u6240\u4fdd\u5b58\u7684\u5b9e\u9645\u5bf9\u8c61\u3002<\/span><\/p>\n<\/li>\n<\/ol>\n

    \u5185\u5b58\u6cc4\u6f0f\u53d1\u751f\u7684\u60c5\u5883\uff1a<\/span><\/p>\n

      \n
    1. \n

      ThreadLocalMap\u7684\u751f\u547d\u5468\u671f<\/span>\uff1aThreadLocalMap\u7684\u751f\u547d\u5468\u671f\u4e0e\u5bf9\u5e94\u7684\u7ebf\u7a0b\u76f8\u540c\uff0c\u5982\u679c\u7ebf\u7a0b\u4e0d\u6b7b\u4ea1\uff0c\u90a3\u4e48ThreadLocalMap\u53ca\u5176\u6240\u6709\u7684Entry\uff08\u5373\u952e\u503c\u5bf9\uff09\u4e5f\u4e0d\u4f1a\u88abGC\u56de\u6536\u3002<\/span><\/p>\n<\/li>\n

    2. \n

      ThreadLocal\u5bf9\u8c61\u6d88\u5931<\/span>\uff1a\u5373\u4f7fThreadLocal\u5bf9\u8c61\u5df2\u7ecf\u6ca1\u6709\u4efb\u4f55\u5f3a\u5f15\u7528\u6307\u5411\u5b83\uff0c\u6bd4\u5982\u4f60\u7684\u4ee3\u7801\u4e2d\u5df2\u7ecf\u6ca1\u6709\u4efb\u4f55\u5730\u65b9\u5f15\u7528\u8fd9\u4e2aThreadLocal\u53d8\u91cf\u4e86\uff0c\u5b83\u7684entry\u5728ThreadLocalMap\u4e2d\u4ecd\u7136\u5b58\u5728\uff0c\u8fd9\u4e2aentry\u7684\u952e\u662fThreadLocal\u5bf9\u8c61\u7684\u5f15\u7528\uff08\u867d\u7136\u8fd9\u662f\u4e00\u4e2a\u5f31\u5f15\u7528\uff0c\u4f46\u503c\u662f\u4e00\u4e2a\u5f3a\u5f15\u7528\uff09\uff0c\u9664\u975e\u7ebf\u7a0b\u7ed3\u675f\uff0c\u5426\u5219\u8fd9\u4e9bentry\uff08\u952e\u503c\u5bf9\uff09\u5c31\u4e0d\u4f1a\u88ab\u6e05\u7406\u3002<\/span><\/p>\n<\/li>\n

    3. \n

      \u957f\u751f\u547d\u5468\u671f\u7684\u7ebf\u7a0b<\/span>\uff1a\u5728\u4f7f\u7528\u7ebf\u7a0b\u6c60\u7b49\u542b\u6709\u957f\u751f\u547d\u5468\u671f\u7ebf\u7a0b\u7684\u573a\u666f\u4e0b\uff0c\u7531\u4e8e\u7ebf\u7a0b\u4e0d\u4f1a\u9500\u6bc1\uff0c\u5b83\u7684ThreadLocalMap\u4e5f\u4e0d\u4f1a\u9500\u6bc1\uff0c\u56e0\u6b64\u5373\u4fbf\u662f\u6ca1\u6709\u4efb\u4f55\u5916\u90e8\u5f15\u7528\u7684ThreadLocal\u5bf9\u8c61\uff0c\u5176\u5728ThreadLocalMap\u4e2d\u7684entry\u4e5f\u4e0d\u4f1a\u88abGC\u81ea\u52a8\u56de\u6536\u3002<\/span><\/p>\n<\/li>\n<\/ol>\n

      \u7531\u4e8eThreadLocalMap\u4f7f\u7528ThreadLocal\u7684\u5f31\u5f15\u7528\u4f5c\u4e3a\u952e\uff0c\u7406\u8bba\u4e0a\u5f53ThreadLocal\u5b9e\u4f8b\u88ab\u56de\u6536\u540e\uff0c\u5728ThreadLocalMap\u4e2d\u76f8\u5e94\u7684Entry\u7684\u952e\u4f1a\u53d8\u6210null\uff0c\u7136\u800c\u503c\u5374\u4ecd\u662f\u4e00\u4e2a\u5f3a\u5f15\u7528\u3002\u5982\u679c\u7ebf\u7a0b\u7ee7\u7eed\u5b58\u6d3b\uff0c\u5e76\u4e14\u6211\u4eec\u6ca1\u6709\u624b\u52a8\u5220\u9664\u5bf9\u5e94\u7684\u503c\uff0c\u8fd9\u4e2a\u503c\u5c31\u4f1a\u4e00\u76f4\u7559\u5728ThreadLocalMap\u4e2d\uff0c\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002<\/span><\/p>\n

      \u9632\u6b62\u5185\u5b58\u6cc4\u6f0f\u7684\u63aa\u65bd\uff1a<\/span><\/p>\n

      \u4e3a\u4e86\u907f\u514d\u53d1\u751f\u5185\u5b58\u6cc4\u6f0f\uff0c\u5f00\u53d1\u8005\u9700\u8981\u786e\u4fdd\uff1a<\/span><\/p>\n

        \n
      1. \n

        \u663e\u5f0f\u6e05\u7406<\/span>\uff1a\u6700\u597d\u7684\u505a\u6cd5\u662f\u5728\u4f7f\u7528\u5b8cThreadLocal\u5b58\u50a8\u7684\u5bf9\u8c61\u4e4b\u540e\uff0c\u663e\u5f0f\u8c03\u7528<\/span>ThreadLocal.remove()<\/span><\/span>\u65b9\u6cd5\u6765\u5220\u9664ThreadLocalMap\u4e2d\u5bf9\u5e94\u7684Entry\u3002<\/span><\/p>\n<\/li>\n

      2. \n

        \u9650\u5236ThreadLocal\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f<\/span>\uff1a\u786e\u4fddThreadLocal\u7684\u751f\u547d\u5468\u671f\u4e0d\u8d85\u8fc7\u4f7f\u7528\u5b83\u7684\u7ebf\u7a0b\u7684\u751f\u547d\u5468\u671f\u3002<\/span><\/p>\n<\/li>\n

      3. \n

        \u8c28\u614e\u4f7f\u7528\u7ebf\u7a0b\u6c60<\/span>\uff1a\u7ebf\u7a0b\u6c60\u4e2d\u7684\u7ebf\u7a0b\u751f\u547d\u5468\u671f\u5f88\u957f\uff0c\u5b83\u4eec\u4f1a\u590d\u7528ThreadLocal\u53d8\u91cf\uff0c\u8fd9\u53ef\u80fd\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\u3002<\/span><\/p>\n<\/li>\n<\/ol>\n

        \u7efc\u4e0a\u6240\u8ff0\uff0cThreadLocal\u9020\u6210\u5185\u5b58\u6cc4\u6f0f\u7684\u6839\u6e90\u5728\u4e8eThreadLocalMap\u7684\u751f\u547d\u5468\u671f\u4e0e\u7ebf\u7a0b\u4e00\u6837\u957f\uff0c\u5982\u679c\u4e0d\u8fdb\u884c\u9002\u5f53\u7684\u6e05\u7406\u64cd\u4f5c\uff0c\u90a3\u4e48\u968f\u7740\u7ebf\u7a0b\u7684\u6301\u7eed\u8fd0\u884c\uff0c\u5931\u53bb\u5916\u90e8\u5f15\u7528\u7684ThreadLocal\u5bf9\u8c61\u6240\u5360\u7528\u7684\u5185\u5b58\u5c06\u4e0d\u80fd\u88abGC\u56de\u6536\u3002<\/span><\/p>\n

        <\/figure>\n

        <\/mp-style-type><\/p>\n

        \n

        \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\u5185\u5b58\u6cc4\u6f0f\u7684\u6838\u5fc3\u539f\u56e0\u5728\u4e8e\u5176\u4f7f\u7528\u4e86Thread\u7c7b\u4e2d\u7684ThreadLocal.ThreadLocalMap\u6570\u636e\u7ed3\u6784 …<\/p>\n","protected":false},"author":1,"featured_media":4105,"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-4108","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\/20240524145207578-150x150.jpeg","content_first_image":null,"post_medium_image_300":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145207578-300x128.jpeg","post_thumbnail_image_624":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145207578-1024x435.jpeg","post_frist_image":null,"post_medium_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145207578-300x128.jpeg","post_large_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145207578-1024x435.jpeg","post_full_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145207578.jpeg","post_all_images":[],"videoAdId":"","listAd":"0","listAdId":"","listAdEvery":6,"total_comments":0,"category_name":"\u9762\u8bd5","post_date":"2024-04-17","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":236,"next_post_id":4104,"next_post_title":"\u9762\u8bd5\u5b98\uff1a\u5728Java\u4e2d\uff0c\u54ea\u4e9b\u5e38\u89c1\u7684\u573a\u666f\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\uff1f","previous_post_id":4537,"previous_post_title":"\u9762\u8bd5\u5b98\uff1aRedis\u6709\u54ea\u51e0\u79cd\u6570\u636e\u7c7b\u578b\uff1f\u4f7f\u7528\u573a\u666f\u662f\u4ec0\u4e48\uff1f\u5206\u522b\u662f\u600e\u4e48\u5b9e\u73b0\u7684\uff1fZset\u4e3a\u4ec0\u4e48\u4e0d\u7528\u6811\u5b9e\u73b0\u5462\uff1f\u6570\u636e\u7c7b\u578b\u9898\u76ee4\u8fde\u95ee\u4f60\u63a5\u5f97\u4f4f\u4e48","_links":{"self":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/4108","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=4108"}],"version-history":[{"count":0,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/4108\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media\/4105"}],"wp:attachment":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media?parent=4108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/categories?post=4108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/tags?post=4108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}