{"id":37297,"date":"2023-12-11T14:40:55","date_gmt":"2023-12-11T06:40:55","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=37297"},"modified":"2023-12-11T14:40:55","modified_gmt":"2023-12-11T06:40:55","slug":"%e7%ae%80%e5%8d%95%e7%9a%84%e4%bb%8b%e7%bb%8d%e4%b8%80%e4%b8%8b%e5%bc%ba%e5%bc%95%e7%94%a8%e3%80%81%e8%bd%af%e5%bc%95%e7%94%a8%e3%80%81%e5%bc%b1%e5%bc%95%e7%94%a8%e3%80%81%e8%99%9a%e5%bc%95%e7%94%a8","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/%e7%ae%80%e5%8d%95%e7%9a%84%e4%bb%8b%e7%bb%8d%e4%b8%80%e4%b8%8b%e5%bc%ba%e5%bc%95%e7%94%a8%e3%80%81%e8%bd%af%e5%bc%95%e7%94%a8%e3%80%81%e5%bc%b1%e5%bc%95%e7%94%a8%e3%80%81%e8%99%9a%e5%bc%95%e7%94%a8\/","title":{"rendered":"\u7b80\u5355\u7684\u4ecb\u7ecd\u4e00\u4e0b\u5f3a\u5f15\u7528\u3001\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u3001\u865a\u5f15\u7528\uff08\u865a\u5f15\u7528\u4e0e\u8f6f\u5f15\u7528\u548c\u5f31\u5f15\u7528\u7684\u533a\u522b\u3001\u4f7f\u7528\u8f6f\u5f15\u7528\u80fd\u5e26\u6765\u7684\u597d\u5904\uff09\uff1f"},"content":{"rendered":"

“`” \u65e0\u8bba\u662f\u901a\u8fc7\u5f15\u7528\u8ba1\u6570\u6cd5\u5224\u65ad\u5bf9\u8c61\u5f15\u7528\u6570\u91cf\uff0c\u8fd8\u662f\u901a\u8fc7\u53ef\u8fbe\u6027\u5206\u6790\u6cd5\u5224\u65ad\u5bf9\u8c61\u7684\u5f15\u7528\u94fe\u662f\u5426\u53ef\u8fbe\uff0c\u5224\u5b9a\u5bf9\u8c61\u7684\u5b58\u6d3b\u90fd\u4e0e\u201c\u5f15\u7528\u201d\u6709\u5173\u3002<\/p>\n

JDK1.2 \u4e4b\u524d\uff0cJava \u4e2d\u5f15\u7528\u7684\u5b9a\u4e49\u5f88\u4f20\u7edf\uff1a\u5982\u679c reference \u7c7b\u578b\u7684\u6570\u636e\u5b58\u50a8\u7684\u6570\u503c\u4ee3\u8868\u7684\u662f\u53e6\u4e00\u5757\u5185\u5b58\u7684\u8d77\u59cb\u5730\u5740\uff0c\u5c31\u79f0\u8fd9\u5757\u5185\u5b58\u4ee3\u8868\u4e00\u4e2a\u5f15\u7528\u3002<\/p>\n

JDK1.2 \u4ee5\u540e\uff0cJava \u5bf9\u5f15\u7528\u7684\u6982\u5ff5\u8fdb\u884c\u4e86\u6269\u5145\uff0c\u5c06\u5f15\u7528\u5206\u4e3a\u5f3a\u5f15\u7528\u3001\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u3001\u865a\u5f15\u7528\u56db\u79cd\uff08\u5f15\u7528\u5f3a\u5ea6\u9010\u6e10\u51cf\u5f31\uff09<\/p>\n

<strong>1\uff0e\u5f3a\u5f15\u7528\uff08StrongReference\uff09<\/strong><\/p>\n

\u4ee5\u524d\u6211\u4eec\u4f7f\u7528\u7684\u5927\u90e8\u5206\u5f15\u7528\u5b9e\u9645\u4e0a\u90fd\u662f\u5f3a\u5f15\u7528\uff0c\u8fd9\u662f\u4f7f\u7528\u6700\u666e\u904d\u7684\u5f15\u7528\u3002\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u5177\u6709\u5f3a\u5f15\u7528\uff0c\u90a3\u5c31\u7c7b\u4f3c\u4e8e<strong>\u5fc5\u4e0d\u53ef\u5c11\u7684\u751f\u6d3b\u7528\u54c1<\/strong>\uff0c\u5783\u573e\u56de\u6536\u5668\u7edd\u4e0d\u4f1a\u56de\u6536\u5b83\u3002\u5f53\u5185\u5b58\u7a7a\u95f4\u4e0d\u8db3\uff0cJava \u865a\u62df\u673a\u5b81\u613f\u629b\u51fa OutOfMemoryError \u9519\u8bef\uff0c\u4f7f\u7a0b\u5e8f\u5f02\u5e38\u7ec8\u6b62\uff0c\u4e5f\u4e0d\u4f1a\u9760\u968f\u610f\u56de\u6536\u5177\u6709\u5f3a\u5f15\u7528\u7684\u5bf9\u8c61\u6765\u89e3\u51b3\u5185\u5b58\u4e0d\u8db3\u95ee\u9898\u3002<\/p>\n

<strong>2\uff0e\u8f6f\u5f15\u7528\uff08SoftReference\uff09<\/strong><\/p>\n

\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u53ea\u5177\u6709\u8f6f\u5f15\u7528\uff0c\u90a3\u5c31\u7c7b\u4f3c\u4e8e<strong>\u53ef\u6709\u53ef\u65e0\u7684\u751f\u6d3b\u7528\u54c1<\/strong>\u3002\u5982\u679c\u5185\u5b58\u7a7a\u95f4\u8db3\u591f\uff0c\u5783\u573e\u56de\u6536\u5668\u5c31\u4e0d\u4f1a\u56de\u6536\u5b83\uff0c\u5982\u679c\u5185\u5b58\u7a7a\u95f4\u4e0d\u8db3\u4e86\uff0c\u5c31\u4f1a\u56de\u6536\u8fd9\u4e9b\u5bf9\u8c61\u7684\u5185\u5b58\u3002\u53ea\u8981\u5783\u573e\u56de\u6536\u5668\u6ca1\u6709\u56de\u6536\u5b83\uff0c\u8be5\u5bf9\u8c61\u5c31\u53ef\u4ee5\u88ab\u7a0b\u5e8f\u4f7f\u7528\u3002\u8f6f\u5f15\u7528\u53ef\u7528\u6765\u5b9e\u73b0\u5185\u5b58\u654f\u611f\u7684\u9ad8\u901f\u7f13\u5b58\u3002<\/p>\n

\u8f6f\u5f15\u7528\u53ef\u4ee5\u548c\u4e00\u4e2a\u5f15\u7528\u961f\u5217\uff08ReferenceQueue\uff09\u8054\u5408\u4f7f\u7528\uff0c\u5982\u679c\u8f6f\u5f15\u7528\u6240\u5f15\u7528\u7684\u5bf9\u8c61\u88ab\u5783\u573e\u56de\u6536\uff0cJAVA \u865a\u62df\u673a\u5c31\u4f1a\u628a\u8fd9\u4e2a\u8f6f\u5f15\u7528\u52a0\u5165\u5230\u4e0e\u4e4b\u5173\u8054\u7684\u5f15\u7528\u961f\u5217\u4e2d\u3002<\/p>\n

<strong>3\uff0e\u5f31\u5f15\u7528\uff08WeakReference\uff09<\/strong><\/p>\n

\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u53ea\u5177\u6709\u5f31\u5f15\u7528\uff0c\u90a3\u5c31\u7c7b\u4f3c\u4e8e<strong>\u53ef\u6709\u53ef\u65e0\u7684\u751f\u6d3b\u7528\u54c1<\/strong>\u3002\u5f31\u5f15\u7528\u4e0e\u8f6f\u5f15\u7528\u7684\u533a\u522b\u5728\u4e8e\uff1a\u53ea\u5177\u6709\u5f31\u5f15\u7528\u7684\u5bf9\u8c61\u62e5\u6709\u66f4\u77ed\u6682\u7684\u751f\u547d\u5468\u671f\u3002\u5728\u5783\u573e\u56de\u6536\u5668\u7ebf\u7a0b\u626b\u63cf\u5b83\u6240\u7ba1\u8f96\u7684\u5185\u5b58\u533a\u57df\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4e00\u65e6\u53d1\u73b0\u4e86\u53ea\u5177\u6709\u5f31\u5f15\u7528\u7684\u5bf9\u8c61\uff0c\u4e0d\u7ba1\u5f53\u524d\u5185\u5b58\u7a7a\u95f4\u8db3\u591f\u4e0e\u5426\uff0c\u90fd\u4f1a\u56de\u6536\u5b83\u7684\u5185\u5b58\u3002\u4e0d\u8fc7\uff0c\u7531\u4e8e\u5783\u573e\u56de\u6536\u5668\u662f\u4e00\u4e2a\u4f18\u5148\u7ea7\u5f88\u4f4e\u7684\u7ebf\u7a0b\uff0c \u56e0\u6b64\u4e0d\u4e00\u5b9a\u4f1a\u5f88\u5feb\u53d1\u73b0\u90a3\u4e9b\u53ea\u5177\u6709\u5f31\u5f15\u7528\u7684\u5bf9\u8c61\u3002<\/p>\n

\u5f31\u5f15\u7528\u53ef\u4ee5\u548c\u4e00\u4e2a\u5f15\u7528\u961f\u5217\uff08ReferenceQueue\uff09\u8054\u5408\u4f7f\u7528\uff0c\u5982\u679c\u5f31\u5f15\u7528\u6240\u5f15\u7528\u7684\u5bf9\u8c61\u88ab\u5783\u573e\u56de\u6536\uff0cJava \u865a\u62df\u673a\u5c31\u4f1a\u628a\u8fd9\u4e2a\u5f31\u5f15\u7528\u52a0\u5165\u5230\u4e0e\u4e4b\u5173\u8054\u7684\u5f15\u7528\u961f\u5217\u4e2d\u3002<\/p>\n

<strong>4\uff0e\u865a\u5f15\u7528\uff08PhantomReference\uff09<\/strong><\/p>\n

""\u865a\u5f15\u7528""\u987e\u540d\u601d\u4e49\uff0c\u5c31\u662f\u5f62\u540c\u865a\u8bbe\uff0c\u4e0e\u5176\u4ed6\u51e0\u79cd\u5f15\u7528\u90fd\u4e0d\u540c\uff0c\u865a\u5f15\u7528\u5e76\u4e0d\u4f1a\u51b3\u5b9a\u5bf9\u8c61\u7684\u751f\u547d\u5468\u671f\u3002\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u4ec5\u6301\u6709\u865a\u5f15\u7528\uff0c\u90a3\u4e48\u5b83\u5c31\u548c\u6ca1\u6709\u4efb\u4f55\u5f15\u7528\u4e00\u6837\uff0c\u5728\u4efb\u4f55\u65f6\u5019\u90fd\u53ef\u80fd\u88ab\u5783\u573e\u56de\u6536\u3002<\/p>\n

<strong>\u865a\u5f15\u7528\u4e3b\u8981\u7528\u6765\u8ddf\u8e2a\u5bf9\u8c61\u88ab\u5783\u573e\u56de\u6536\u7684\u6d3b\u52a8<\/strong>\u3002<\/p>\n

<strong>\u865a\u5f15\u7528\u4e0e\u8f6f\u5f15\u7528\u548c\u5f31\u5f15\u7528\u7684\u4e00\u4e2a\u533a\u522b\u5728\u4e8e\uff1a<\/strong> \u865a\u5f15\u7528\u5fc5\u987b\u548c\u5f15\u7528\u961f\u5217\uff08ReferenceQueue\uff09\u8054\u5408\u4f7f\u7528\u3002\u5f53\u5783\u573e\u56de\u6536\u5668\u51c6\u5907\u56de\u6536\u4e00\u4e2a\u5bf9\u8c61\u65f6\uff0c\u5982\u679c\u53d1\u73b0\u5b83\u8fd8\u6709\u865a\u5f15\u7528\uff0c\u5c31\u4f1a\u5728\u56de\u6536\u5bf9\u8c61\u7684\u5185\u5b58\u4e4b\u524d\uff0c\u628a\u8fd9\u4e2a\u865a\u5f15\u7528\u52a0\u5165\u5230\u4e0e\u4e4b\u5173\u8054\u7684\u5f15\u7528\u961f\u5217\u4e2d\u3002\u7a0b\u5e8f\u53ef\u4ee5\u901a\u8fc7\u5224\u65ad\u5f15\u7528\u961f\u5217\u4e2d\u662f\u5426\u5df2\u7ecf\u52a0\u5165\u4e86\u865a\u5f15\u7528\uff0c\u6765\u4e86\u89e3\u88ab\u5f15\u7528\u7684\u5bf9\u8c61\u662f\u5426\u5c06\u8981\u88ab\u5783\u573e\u56de\u6536\u3002\u7a0b\u5e8f\u5982\u679c\u53d1\u73b0\u67d0\u4e2a\u865a\u5f15\u7528\u5df2\u7ecf\u88ab\u52a0\u5165\u5230\u5f15\u7528\u961f\u5217\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u5728\u6240\u5f15\u7528\u7684\u5bf9\u8c61\u7684\u5185\u5b58\u88ab\u56de\u6536\u4e4b\u524d\u91c7\u53d6\u5fc5\u8981\u7684\u884c\u52a8\u3002<\/p>\n

\u7279\u522b\u6ce8\u610f\uff0c\u5728\u7a0b\u5e8f\u8bbe\u8ba1\u4e2d\u4e00\u822c\u5f88\u5c11\u4f7f\u7528\u5f31\u5f15\u7528\u4e0e\u865a\u5f15\u7528\uff0c\u4f7f\u7528\u8f6f\u5f15\u7528\u7684\u60c5\u51b5\u8f83\u591a\uff0c\u8fd9\u662f\u56e0\u4e3a<strong>\u8f6f\u5f15\u7528\u53ef\u4ee5\u52a0\u901f JVM \u5bf9\u5783\u573e\u5185\u5b58\u7684\u56de\u6536\u901f\u5ea6\uff0c\u53ef\u4ee5\u7ef4\u62a4\u7cfb\u7edf\u7684\u8fd0\u884c\u5b89\u5168\uff0c\u9632\u6b62\u5185\u5b58\u6ea2\u51fa\uff08OutOfMemory\uff09\u7b49\u95ee\u9898\u7684\u4ea7\u751f<\/strong>\u3002<\/p>\n

<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"

“`” \u65e0\u8bba\u662f\u901a\u8fc7\u5f15\u7528\u8ba1\u6570\u6cd5\u5224\u65ad\u5bf9\u8c61\u5f15\u7528\u6570\u91cf\uff0c\u8fd8\u662f\u901a\u8fc7\u53ef\u8fbe\u6027\u5206\u6790\u6cd5\u5224\u65ad\u5bf9\u8c61\u7684\u5f15\u7528\u94fe\u662f\u5426 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-37297","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37297","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=37297"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37297\/revisions"}],"predecessor-version":[{"id":37298,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37297\/revisions\/37298"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=37297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=37297"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=37297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}