{"id":10169,"date":"2023-11-28T21:28:01","date_gmt":"2023-11-28T13:28:01","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10169"},"modified":"2023-12-07T10:56:46","modified_gmt":"2023-12-07T02:56:46","slug":"jvm-zhong-qiang-yin-yong-ruan-yin-yong-ruo-yin-yon","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/jvm-zhong-qiang-yin-yong-ruan-yin-yong-ruo-yin-yon\/","title":{"rendered":"JVM\u4e2d\u5f3a\u5f15\u7528\u3001\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u3001\u865a\u5f15\u7528\u662f\u4ec0\u4e48\uff0c\u6709\u4ec0\u4e48\u533a\u522b\uff1f"},"content":{"rendered":"<p>\u5728Java\u4e2d\uff0c\u5f15\u7528\u662f\u7528\u4e8e\u63cf\u8ff0\u5bf9\u8c61\u751f\u547d\u5468\u671f\u548c\u5783\u573e\u56de\u6536\u884c\u4e3a\u7684\u673a\u5236\u3002\u4e3b\u8981\u6709\u56db\u79cd\u7c7b\u578b\u7684\u5f15\u7528\uff1a\u5f3a\u5f15\u7528\u3001\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u548c\u865a\u5f15\u7528\u3002<\/p>\n<h3><a id=\"1%E5%BC%BA%E5%BC%95%E7%94%A8%EF%BC%88-strong-reference%EF%BC%89%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>1. \u5f3a\u5f15\u7528\uff08Strong Reference\uff09\uff1a<\/h3>\n<ul>\n<li><strong>\u7279\u70b9\uff1a<\/strong> \u5f3a\u5f15\u7528\u662f\u9ed8\u8ba4\u7684\u5f15\u7528\u7c7b\u578b\uff0c\u5b83\u4f1a\u4f7f\u5bf9\u8c61\u59cb\u7ec8\u4fdd\u6301\u5b58\u6d3b\u3002\u53ea\u8981\u5b58\u5728\u5f3a\u5f15\u7528\uff0c\u5783\u573e\u6536\u96c6\u5668\u5c31\u4e0d\u4f1a\u56de\u6536\u88ab\u5f15\u7528\u7684\u5bf9\u8c61\u3002<\/li>\n<li><strong>\u793a\u4f8b\uff1a<\/strong> <code>Object obj = new Object();<\/code><\/li>\n<\/ul>\n<h3><a id=\"2%E8%BD%AF%E5%BC%95%E7%94%A8%EF%BC%88-soft-reference%EF%BC%89%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>2. \u8f6f\u5f15\u7528\uff08Soft Reference\uff09\uff1a<\/h3>\n<ul>\n<li><strong>\u7279\u70b9\uff1a<\/strong> \u8f6f\u5f15\u7528\u7528\u4e8e\u63cf\u8ff0\u4e00\u4e9b\u8fd8\u6709\u7528\u4f46\u5e76\u975e\u5fc5\u9700\u7684\u5bf9\u8c61\u3002\u5728\u7cfb\u7edf\u5c06\u8981\u53d1\u751f\u5185\u5b58\u6ea2\u51fa\u4e4b\u524d\uff0c\u4f1a\u5c3d\u53ef\u80fd\u5730\u56de\u6536\u8f6f\u5f15\u7528\u6307\u5411\u7684\u5bf9\u8c61\u3002\u53ef\u4ee5\u901a\u8fc7<code>SoftReference<\/code>\u7c7b\u6765\u521b\u5efa\u8f6f\u5f15\u7528\u3002<\/li>\n<li><strong>\u793a\u4f8b\uff1a<\/strong> <code>SoftReference&lt;Object&gt; softRef = new SoftReference&lt;&gt;(new Object());<\/code><\/li>\n<\/ul>\n<h3><a id=\"3%E5%BC%B1%E5%BC%95%E7%94%A8%EF%BC%88-weak-reference%EF%BC%89%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>3. \u5f31\u5f15\u7528\uff08Weak Reference\uff09\uff1a<\/h3>\n<ul>\n<li><strong>\u7279\u70b9\uff1a<\/strong> \u5f31\u5f15\u7528\u7528\u4e8e\u63cf\u8ff0\u975e\u5fc5\u9700\u5bf9\u8c61\uff0c\u6bd4\u8f6f\u5f15\u7528\u66f4\u5f31\u3002\u5f53\u5783\u573e\u56de\u6536\u5668\u5de5\u4f5c\u65f6\uff0c\u65e0\u8bba\u5185\u5b58\u662f\u5426\u5145\u8db3\uff0c\u90fd\u4f1a\u56de\u6536\u5f31\u5f15\u7528\u6307\u5411\u7684\u5bf9\u8c61\u3002\u53ef\u4ee5\u901a\u8fc7<code>WeakReference<\/code>\u7c7b\u6765\u521b\u5efa\u5f31\u5f15\u7528\u3002<\/li>\n<li><strong>\u793a\u4f8b\uff1a<\/strong> <code>WeakReference&lt;Object&gt; weakRef = new WeakReference&lt;&gt;(new Object());<\/code><\/li>\n<\/ul>\n<h3><a id=\"4%E8%99%9A%E5%BC%95%E7%94%A8%EF%BC%88-phantom-reference%EF%BC%89%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>4. \u865a\u5f15\u7528\uff08Phantom Reference\uff09\uff1a<\/h3>\n<ul>\n<li><strong>\u7279\u70b9\uff1a<\/strong> \u865a\u5f15\u7528\u662f\u6700\u5f31\u7684\u4e00\u79cd\u5f15\u7528\u7c7b\u578b\uff0c\u51e0\u4e4e\u6ca1\u6709\u76f4\u63a5\u4f5c\u7528\u3002\u865a\u5f15\u7528\u4e3b\u8981\u7528\u4e8e\u8ddf\u8e2a\u5bf9\u8c61\u88ab\u5783\u573e\u56de\u6536\u7684\u72b6\u6001\u3002\u5f53\u8bd5\u56fe\u901a\u8fc7\u865a\u5f15\u7528\u7684 <code>get<\/code> \u65b9\u6cd5\u83b7\u53d6\u5bf9\u8c61\u65f6\uff0c\u5c06\u59cb\u7ec8\u8fd4\u56de <code>null<\/code>\u3002\u53ef\u4ee5\u901a\u8fc7<code>PhantomReference<\/code>\u7c7b\u6765\u521b\u5efa\u865a\u5f15\u7528\u3002<\/li>\n<li><strong>\u793a\u4f8b\uff1a<\/strong> <code>PhantomReference&lt;Object&gt; phantomRef = new PhantomReference&lt;&gt;(new Object(), referenceQueue);<\/code><\/li>\n<\/ul>\n<h3><a id=\"%E5%8C%BA%E5%88%AB%E6%80%BB%E7%BB%93%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u533a\u522b\u603b\u7ed3\uff1a<\/h3>\n<ol>\n<li>\n<strong>\u751f\u547d\u5468\u671f\uff1a<\/strong><\/p>\n<ul>\n<li>\u5f3a\u5f15\u7528\uff1a\u5f53\u6ca1\u6709\u5f3a\u5f15\u7528\u65f6\uff0c\u5bf9\u8c61\u4f1a\u88ab\u56de\u6536\u3002<\/li>\n<li>\u8f6f\u5f15\u7528\uff1a\u5728\u5185\u5b58\u4e0d\u8db3\u65f6\uff0c\u5bf9\u8c61\u4f1a\u88ab\u56de\u6536\u3002<\/li>\n<li>\u5f31\u5f15\u7528\uff1a\u5728\u5783\u573e\u56de\u6536\u65f6\uff0c\u5bf9\u8c61\u603b\u662f\u88ab\u56de\u6536\u3002<\/li>\n<li>\u865a\u5f15\u7528\uff1a\u65e0\u6cd5\u901a\u8fc7\u865a\u5f15\u7528\u83b7\u53d6\u5bf9\u8c61\uff0c\u4e3b\u8981\u7528\u4e8e\u8ddf\u8e2a\u5bf9\u8c61\u88ab\u56de\u6536\u7684\u72b6\u6001\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u5f15\u7528\u83b7\u53d6\u5bf9\u8c61\uff1a<\/strong><\/p>\n<ul>\n<li>\u5f3a\u5f15\u7528\uff1a\u901a\u8fc7\u5f3a\u5f15\u7528\u53ef\u4ee5\u76f4\u63a5\u83b7\u53d6\u5bf9\u8c61\u3002<\/li>\n<li>\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u3001\u865a\u5f15\u7528\uff1a\u901a\u8fc7\u76f8\u5e94\u7684\u5f15\u7528\u5bf9\u8c61\u83b7\u53d6\u7684\u7ed3\u679c\u53ef\u80fd\u4e3a <code>null<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u9002\u7528\u573a\u666f\uff1a<\/strong><\/p>\n<ul>\n<li>\u5f3a\u5f15\u7528\uff1a\u9002\u7528\u4e8e\u786e\u4fdd\u5bf9\u8c61\u59cb\u7ec8\u5b58\u6d3b\u7684\u573a\u666f\u3002<\/li>\n<li>\u8f6f\u5f15\u7528\uff1a\u9002\u7528\u4e8e\u7f13\u5b58\u573a\u666f\uff0c\u5141\u8bb8\u5bf9\u8c61\u88ab\u56de\u6536\u4f46\u5728\u5185\u5b58\u4e0d\u8db3\u65f6\u4fdd\u6301\u4e00\u5b9a\u65f6\u95f4\u3002<\/li>\n<li>\u5f31\u5f15\u7528\uff1a\u9002\u7528\u4e8e\u4e34\u65f6\u6027\u7684\u7f13\u5b58\u573a\u666f\uff0c\u5bf9\u8c61\u53ef\u80fd\u88ab\u5f88\u5feb\u56de\u6536\u3002<\/li>\n<li>\u865a\u5f15\u7528\uff1a\u4e3b\u8981\u7528\u4e8e\u5bf9\u8c61\u88ab\u56de\u6536\u7684\u8ddf\u8e2a\uff0c\u8f85\u52a9\u5904\u7406\u4e00\u4e9b\u6e05\u7406\u5de5\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u5f15\u7528\u7c7b\u578b\u7684\u9009\u62e9\u53d6\u51b3\u4e8e\u5bf9\u5bf9\u8c61\u751f\u547d\u5468\u671f\u7ba1\u7406\u7684\u9700\u6c42\u3002\u5728\u4e00\u4e9b\u9ad8\u7ea7\u5e94\u7528\u4e2d\uff0c\u7ed3\u5408\u5f15\u7528\u7c7b\u578b\u53ef\u4ee5\u5b9e\u73b0\u66f4\u7075\u6d3b\u548c\u7cbe\u7ec6\u7684\u5185\u5b58\u7ba1\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Java\u4e2d\uff0c\u5f15\u7528\u662f\u7528\u4e8e\u63cf\u8ff0\u5bf9\u8c61\u751f\u547d\u5468\u671f\u548c\u5783\u573e\u56de\u6536\u884c\u4e3a\u7684\u673a\u5236\u3002\u4e3b\u8981\u6709\u56db\u79cd\u7c7b\u578b\u7684\u5f15\u7528\uff1a\u5f3a\u5f15\u7528\u3001\u8f6f\u5f15\u7528\u3001\u5f31\u5f15\u7528\u548c\u865a [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[119],"tags":[],"class_list":["post-10169","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10169","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\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=10169"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10169\/revisions"}],"predecessor-version":[{"id":16809,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10169\/revisions\/16809"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10169"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10169"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10169"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}