{"id":3974,"date":"2024-05-18T08:08:41","date_gmt":"2024-05-18T00:08:41","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%ad%e7%9a%84%e8%bd%af%e5%bc%95%e7%94%a8%e3%80%81%e5%bc%b1%e5%bc%95%e7%94%a8%e5%92%8c%e8%99%9a%e5%bc%95%e7%94%a8%e6%9c%89%e4%bb%80%e4%b9%88%e5%8c%ba\/"},"modified":"2024-05-18T08:08:41","modified_gmt":"2024-05-18T00:08:41","slug":"%e9%9d%a2%e8%af%95%e5%ae%98%ef%bc%9ajava%e4%b8%ad%e7%9a%84%e8%bd%af%e5%bc%95%e7%94%a8%e3%80%81%e5%bc%b1%e5%bc%95%e7%94%a8%e5%92%8c%e8%99%9a%e5%bc%95%e7%94%a8%e6%9c%89%e4%bb%80%e4%b9%88%e5%8c%ba","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%ad%e7%9a%84%e8%bd%af%e5%bc%95%e7%94%a8%e3%80%81%e5%bc%b1%e5%bc%95%e7%94%a8%e5%92%8c%e8%99%9a%e5%bc%95%e7%94%a8%e6%9c%89%e4%bb%80%e4%b9%88%e5%8c%ba\/","title":{"rendered":"\u9762\u8bd5\u5b98\uff1aJava\u4e2d\u7684\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u548c\u865a\u5f15\u7528\u6709\u4ec0\u4e48\u533a\u522b\uff1f"},"content":{"rendered":"
\n

\u5728Java\u4e2d\uff0c\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u548c\u865a\u5f15\u7528\u662f\u4e09\u79cd\u4e0d\u540c\u7c7b\u578b\u7684\u5f15\u7528\uff0c\u5b83\u4eec\u5404\u81ea\u5177\u6709\u4e0d\u540c\u7684\u6027\u8d28\u548c\u7528\u9014\u3002\u4ee5\u4e0b\u662f\u8be6\u7ec6\u89e3\u91ca\u5b83\u4eec\u4e4b\u95f4\u7684\u533a\u522b\uff0c\u4ee5\u53ca\u5404\u81ea\u9002\u5408\u7684\u5e94\u7528\u573a\u666f\uff1a<\/span><\/p>\n

1. \u8f6f\u5f15\u7528\uff08SoftReference\uff09<\/span><\/strong><\/h3>\n

\u5b9a\u4e49\uff1a<\/span><\/strong><\/p>\n

    \n
  • \n

    \u8f6f\u5f15\u7528\u662f\u4e00\u79cd\u5f3a\u5ea6\u4ecb\u4e8e\u5f3a\u5f15\u7528\u548c\u5f31\u5f15\u7528\u4e4b\u95f4\u7684\u5f15\u7528\u3002<\/span><\/p>\n<\/li>\n

  • \n

    \u5f53\u5185\u5b58\u4e0d\u8db3\u65f6\uff0c\u5783\u573e\u56de\u6536\u5668\u4f1a\u56de\u6536\u88ab\u8f6f\u5f15\u7528\u5f15\u7528\u7684\u5bf9\u8c61\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

    \u7279\u70b9\uff1a<\/span><\/strong><\/p>\n

      \n
    • \n

      \u751f\u547d\u5468\u671f<\/span><\/strong>\uff1a\u8f6f\u5f15\u7528\u7684\u5bf9\u8c61\u5728\u5185\u5b58\u5145\u8db3\u65f6\u4e0d\u4f1a\u88ab\u56de\u6536\uff0c\u53ea\u5728JVM\u5185\u5b58\u4e0d\u8db3\u65f6\u624d\u4f1a\u88ab\u56de\u6536\uff0c\u4ee5\u907f\u514dOOM\u9519\u8bef\u3002<\/span><\/p>\n<\/li>\n

    • \n

      \u7f13\u5b58\u673a\u5236<\/span><\/strong>\uff1a\u7531\u4e8e\u8f6f\u5f15\u7528\u7684\u8fd9\u4e00\u7279\u6027\uff0c\u5b83\u975e\u5e38\u9002\u5408\u7528\u4e8e\u5b9e\u73b0\u5e0c\u671b\u957f\u65f6\u95f4\u7f13\u5b58\u4f46\u4e0d\u4fdd\u8bc1\u4e00\u5b9a\u5b58\u6d3b\u7684\u5bf9\u8c61\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

      \u5e94\u7528\u573a\u666f\uff1a<\/span><\/strong><\/p>\n

        \n
      • \n

        \u5185\u5b58\u654f\u611f\u7684\u7f13\u5b58<\/span><\/strong>\uff1a\u6bd4\u5982\u56fe\u7247\u7f13\u5b58\u7cfb\u7edf\uff0c\u4f7f\u7528\u8f6f\u5f15\u7528\u6765\u7f13\u5b58\u52a0\u8f7d\u8fc7\u7684\u56fe\u7247\u3002\u5f53\u5185\u5b58\u7d27\u5f20\u65f6\uff0c\u8fd9\u4e9b\u56fe\u7247\u53ef\u4ee5\u88ab\u56de\u6536\u4ee5\u91ca\u653e\u5185\u5b58\uff0c\u4f46\u5728\u5185\u5b58\u5145\u8db3\u65f6\u5b83\u4eec\u4f1a\u88ab\u4fdd\u7559\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/span><\/p>\n<\/li>\n

      • \n

        \u4e34\u65f6\u6570\u636e\u5b58\u50a8<\/span><\/strong>\uff1a\u7528\u4e8e\u5b58\u50a8\u4e00\u4e9b\u9700\u8981\u8f83\u957f\u65f6\u95f4\u4fdd\u7559\u7684\u6570\u636e\u4f46\u53c8\u4e0d\u81f3\u4e8e\u5360\u7528\u8fc7\u591a\u5185\u5b58\u7684\u573a\u666f\uff0c\u4f8b\u5982\u7f13\u5b58\u7528\u6237\u4f1a\u8bdd\u4fe1\u606f\u6216\u4e34\u65f6\u8ba1\u7b97\u7ed3\u679c\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

        2. \u5f31\u5f15\u7528\uff08WeakReference\uff09<\/span><\/strong><\/h3>\n

        \u5b9a\u4e49\uff1a<\/span><\/strong><\/p>\n

          \n
        • \n

          \u5f31\u5f15\u7528\u6bd4\u8f6f\u5f15\u7528\u66f4\u5f31\u3002\u53ea\u8981\u4e00\u4e2a\u5bf9\u8c61\u53ea\u88ab\u5f31\u5f15\u7528\u5f15\u7528\uff0c\u90a3\u4e48\u4e0d\u7ba1\u5f53\u524d\u5185\u5b58\u662f\u5426\u5145\u8db3\uff0c\u8be5\u5bf9\u8c61\u90fd\u4f1a\u5728\u4e0b\u6b21\u5783\u573e\u56de\u6536\u65f6\u88ab\u56de\u6536\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

          \u7279\u70b9\uff1a<\/span><\/strong><\/p>\n

            \n
          • \n

            \u751f\u547d\u5468\u671f<\/span><\/strong>\uff1a\u5f31\u5f15\u7528\u7684\u5bf9\u8c61\u5728\u4e0b\u4e00\u6b21GC\u65f6\u5c31\u53ef\u80fd\u88ab\u56de\u6536\uff0c\u5373\u4f7f\u5185\u5b58\u5145\u8db3\u4e5f\u65e0\u6cd5\u5e78\u514d\u3002<\/span><\/p>\n<\/li>\n

          • \n

            \u9632\u6b62\u5185\u5b58\u6cc4\u6f0f<\/span><\/strong>\uff1a\u7531\u4e8e\u5176\u5bb9\u6613\u88ab\u56de\u6536\u7684\u7279\u6027\uff0c\u5f31\u5f15\u7528\u7ecf\u5e38\u7528\u6765\u907f\u514d\u56e0\u957f\u671f\u5f15\u7528\u800c\u5bfc\u81f4\u7684\u5185\u5b58\u6cc4\u6f0f\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

            \u5e94\u7528\u573a\u666f\uff1a<\/span><\/strong><\/p>\n

              \n
            • \n

              \u7f13\u5b58\u673a\u5236<\/span><\/strong>\uff1a\u9002\u7528\u4e8e\u5b58\u50a8\u4e34\u65f6\u6027\u7684\u7f13\u5b58\u3002\u4f8b\u5982Map\u4e2d\u7684\u6761\u76ee\uff0c\u5229\u7528WeakHashMap\u6765\u4fdd\u5b58\u952e\u503c\u5bf9\uff0c\u952e\u4e3a\u5f31\u5f15\u7528\uff0c\u5f53\u6ca1\u6709\u5176\u5b83\u5f3a\u5f15\u7528\u5b58\u5728\u65f6\uff0c\u81ea\u52a8\u6e05\u9664\u65e0\u7528\u6761\u76ee\u3002<\/span><\/p>\n<\/li>\n

            • \n

              \u76d1\u542c\u5668\u6a21\u5f0f<\/span><\/strong>\uff1a\u5728\u4e8b\u4ef6\u76d1\u542c\u5668\u5b9e\u73b0\u4e2d\uff0c\u901a\u8fc7\u5f31\u5f15\u7528\u4fdd\u5b58\u76d1\u542c\u5668\u5bf9\u8c61\uff0c\u907f\u514d\u56e0\u672a\u79fb\u9664\u76d1\u542c\u5668\u800c\u5bfc\u81f4\u7684\u5185\u5b58\u6cc4\u6f0f\u95ee\u9898\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

              3. \u865a\u5f15\u7528\uff08PhantomReference\uff09<\/span><\/strong><\/h3>\n

              \u5b9a\u4e49\uff1a<\/span><\/strong><\/p>\n

                \n
              • \n

                \u865a\u5f15\u7528\uff0c\u4e5f\u79f0\u4e3a\u5e7d\u7075\u5f15\u7528\uff0c\u662f\u6700\u5f31\u7684\u4e00\u79cd\u5f15\u7528\u7c7b\u578b\u3002<\/span><\/p>\n<\/li>\n

              • \n

                \u865a\u5f15\u7528\u4ec5\u4ec5\u7528\u4e8e\u8ddf\u8e2a\u5bf9\u8c61\u88ab\u5783\u573e\u56de\u6536\u5668\u56de\u6536\u7684\u72b6\u6001\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

                \u7279\u70b9\uff1a<\/span><\/strong><\/p>\n

                  \n
                • \n

                  \u5f15\u7528\u961f\u5217<\/span><\/strong>\uff1a\u865a\u5f15\u7528\u5fc5\u987b\u4e0e\u5f15\u7528\u961f\u5217\uff08ReferenceQueue\uff09\u8054\u5408\u4f7f\u7528\u3002\u5728\u5bf9\u8c61\u88ab\u56de\u6536\u4e4b\u540e\uff0c\u865a\u5f15\u7528\u4f1a\u88ab\u52a0\u5165\u5230\u5f15\u7528\u961f\u5217\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95ee\u8be5\u961f\u5217\u6765\u786e\u5b9a\u5bf9\u8c61\u4f55\u65f6\u88ab\u56de\u6536\u3002<\/span><\/p>\n<\/li>\n

                • \n

                  \u4e0d\u53ef\u8bbf\u95ee\u6027<\/span><\/strong>\uff1a\u901a\u8fc7\u865a\u5f15\u7528\u6240\u5f15\u7528\u7684\u5bf9\u8c61\u662f\u4e0d\u53ef\u89e6\u53ca\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\u4f60\u4e0d\u80fd\u901a\u8fc7\u865a\u5f15\u7528\u6765\u83b7\u53d6\u5bf9\u8c61\u5b9e\u4f8b\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

                  \u5e94\u7528\u573a\u666f\uff1a<\/span><\/strong><\/p>\n

                    \n
                  • \n

                    \u7ba1\u7406\u5806\u5916\u5185\u5b58\u8d44\u6e90<\/span><\/strong>\uff1a\u901a\u5e38\u7528\u4e8e\u6e05\u7406\u3001\u91ca\u653e\u4e00\u4e9b\u975e\u5185\u5b58\u8d44\u6e90\uff0c\u5982\u5173\u95ed\u6587\u4ef6\u3001\u91ca\u653e\u5806\u5916\u5185\u5b58\u7b49\u3002\u4f8b\u5982\uff0c\u5728DirectByteBuffer\u4e2d\u5229\u7528\u865a\u5f15\u7528\u6765\u786e\u4fdd\u5806\u5916\u5185\u5b58\u7684\u6b63\u786e\u91ca\u653e\u3002<\/span><\/p>\n<\/li>\n

                  • \n

                    \u76d1\u63a7\u5bf9\u8c61\u56de\u6536<\/span><\/strong>\uff1a\u901a\u8fc7\u5f15\u7528\u961f\u5217\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u68c0\u6d4b\u67d0\u4e2a\u5bf9\u8c61\u662f\u5426\u5df2\u7ecf\u88ab\u56de\u6536\uff0c\u4e3a\u5bf9\u8c61\u88ab\u56de\u6536\u540e\u8fdb\u884c\u67d0\u4e9b\u540e\u7eed\u5904\u7406\u63d0\u4f9b\u652f\u6301\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n

                    \u603b\u7ed3<\/span><\/strong><\/h3>\n
                      \n
                    • \n

                      \u8f6f\u5f15\u7528\uff08SoftReference\uff09<\/span><\/strong>\uff1a\u9002\u5408\u7528\u4e8e\u5185\u5b58\u654f\u611f\u7684\u7f13\u5b58\u573a\u666f\uff0c\u63d0\u4f9b\u4e00\u79cd\u5c3d\u53ef\u80fd\u957f\u65f6\u95f4\u6301\u6709\u5bf9\u8c61\u7684\u65b9\u5f0f\uff0c\u4f46\u5728\u5185\u5b58\u4e0d\u8db3\u65f6\u53ef\u4ee5\u5b89\u5168\u5730\u56de\u6536\u3002<\/span><\/p>\n<\/li>\n

                    • \n

                      \u5f31\u5f15\u7528\uff08WeakReference\uff09<\/span><\/strong>\uff1a\u9002\u5408\u7528\u4e8e\u9632\u6b62\u5185\u5b58\u6cc4\u6f0f\u7684\u573a\u666f\uff0c\u5982\u7f13\u5b58\u548c\u76d1\u542c\u5668\uff0c\u786e\u4fdd\u5bf9\u8c61\u53ea\u8981\u6ca1\u6709\u5176\u5b83\u5f3a\u5f15\u7528\uff0c\u5c31\u80fd\u7acb\u5373\u88ab\u56de\u6536\u3002<\/span><\/p>\n<\/li>\n

                    • \n

                      \u865a\u5f15\u7528\uff08PhantomReference\uff09<\/span><\/strong>\uff1a\u9002\u5408\u7528\u4e8e\u5bf9\u8c61\u88ab\u56de\u6536\u540e\u7684\u6e05\u7406\u5de5\u4f5c\u548c\u8d44\u6e90\u7ba1\u7406\uff0c\u6bd4\u5982\u5806\u5916\u5185\u5b58\u7684\u91ca\u653e\u6216\u5176\u4ed6\u8d44\u6e90\u7684\u6e05\u7406\u3002<\/span><\/p>\n<\/li>\n<\/ul>\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":"

                      \u5728Java\u4e2d\uff0c\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u548c\u865a\u5f15\u7528\u662f\u4e09\u79cd\u4e0d\u540c\u7c7b\u578b\u7684\u5f15\u7528\uff0c\u5b83\u4eec\u5404\u81ea\u5177\u6709\u4e0d\u540c\u7684\u6027\u8d28\u548c\u7528\u9014\u3002\u4ee5\u4e0b\u662f\u8be6\u7ec6\u89e3\u91ca\u5b83\u4eec\u4e4b\u95f4\u7684\u533a\u522b\uff0c\u4ee5\u53ca\u5404\u81ea\u9002\u5408 …<\/p>\n","protected":false},"author":1,"featured_media":3971,"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-3974","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\/20240524144203672-150x150.jpeg","content_first_image":null,"post_medium_image_300":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524144203672-300x128.jpeg","post_thumbnail_image_624":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524144203672.jpeg","post_frist_image":null,"post_medium_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524144203672-300x128.jpeg","post_large_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524144203672.jpeg","post_full_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524144203672.jpeg","post_all_images":[],"videoAdId":"","listAd":"0","listAdId":"","listAdEvery":6,"total_comments":0,"category_name":"\u9762\u8bd5","post_date":"2024-05-18","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":287,"next_post_id":4124,"next_post_title":"\u9762\u8bd5\u5b98\uff1a\u7b80\u8981\u8bf4\u4e00\u4e0b\u4ece\u6d4f\u89c8\u5668\u8f93\u5165\u7f51\u5740\u5230\u5c55\u793a\u5185\u5bb9\u9700\u8981\u7ecf\u5386\u90a3\u4e9b\u6b65\u9aa4\uff1f","previous_post_id":4708,"previous_post_title":"10 \u79cd\u8d85\u8d5e\u7684 MyBatis \u5199\u6cd5\uff0c\u540c\u4e8b\u90fd\u8bf4\u597d\u7528\uff01","_links":{"self":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/3974","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=3974"}],"version-history":[{"count":0,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/3974\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media\/3971"}],"wp:attachment":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media?parent=3974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/categories?post=3974"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/tags?post=3974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}