{"id":2332,"date":"2022-03-15T22:26:30","date_gmt":"2022-03-15T14:26:30","guid":{"rendered":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=2332"},"modified":"2022-03-15T22:26:30","modified_gmt":"2022-03-15T14:26:30","slug":"%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.zeroheart.xyz\/wordpress\/?p=2332","title":{"rendered":"\u5355\u4f8b\u6a21\u5f0f"},"content":{"rendered":"\n<p>\u8fd9\u4e2a\u6a21\u5f0f\u7528\u7684\u6bd4\u8f83\u591a\uff0c\u4f46\u662f\u4e00\u822c\u90fd\u662fcopy\uff0c\u4eca\u5929\u7a0d\u5fae\u590d\u4e60\u4e00\u4e0b<\/p>\n\n\n\n<p>1.\u61d2\u6c49\u5f0f\u4e0e\u997f\u6c49\u5f0f\u7684\u6839\u672c\u533a\u522b\u5728\u4e0e\u662f\u5426\u5728\u7c7b\u5185\u65b9\u6cd5\u5916\u521b\u5efa\u81ea\u5df1\u7684\u5bf9\u8c61\u3002<\/p>\n\n\n\n<p>2.\u58f0\u660e\u5bf9\u8c61\u90fd\u9700\u8981\u79c1\u6709\u5316\uff0c\u6784\u9020\u65b9\u6cd5\u90fd\u8981\u79c1\u6709\u5316\uff0c\u8fd9\u6837\u5916\u90e8\u624d\u4e0d\u80fd\u901a\u8fc7 new \u5bf9\u8c61\u7684\u65b9\u5f0f\u6765\u8bbf\u95ee\u3002<\/p>\n\n\n\n<p>3.\u997f\u6c49\u5f0f\u7684\u8bdd\u662f\u58f0\u660e\u5e76\u521b\u5efa\u5bf9\u8c61(\u56e0\u4e3a\u4ed6\u997f)\uff0c\u61d2\u6c49\u5f0f\u7684\u8bdd\u53ea\u662f\u58f0\u660e\u5bf9\u8c61\uff0c\u5728\u8c03\u7528\u8be5\u7c7b\u7684 getinstance() \u65b9\u6cd5\u65f6\u624d\u4f1a\u8fdb\u884c new \u5bf9\u8c61\u3002<\/p>\n\n\n\n<p>4.\u51e0\u79cd\u5199\u6cd5<\/p>\n\n\n\n<p>4.1\u53cc\u68c0\u9501\/\u53cc\u91cd\u6821\u9a8c\u9501<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Singleton {  \n    private volatile static Singleton singleton;  \n    private Singleton (){}  \n    public static Singleton getSingleton() {  \n      if (singleton == null) {  \n        synchronized (Singleton.class) {  \n            if (singleton == null) {  \n                singleton = new Singleton();  \n            }  \n        }  \n      }  \n      return singleton;  \n    }  \n}\n<\/code><\/pre>\n\n\n\n<p>4.2\u767b\u8bb0\u5f0f\/\u9759\u6001\u5185\u90e8\u7c7b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Singleton {  \n    private static class SingletonHolder {  \n     private static final Singleton INSTANCE = new Singleton();  \n    }  \n    private Singleton (){}  \n    public static final Singleton getInstance() {  \n        return SingletonHolder.INSTANCE;  \n    }  \n}<\/code><\/pre>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u4e2a\u6a21\u5f0f\u7528\u7684\u6bd4\u8f83\u591a\uff0c\u4f46\u662f\u4e00\u822c\u90fd\u662fcopy\uff0c\u4eca\u5929\u7a0d\u5fae\u590d\u4e60\u4e00\u4e0b 1.\u61d2\u6c49\u5f0f\u4e0e\u997f\u6c49\u5f0f\u7684\u6839\u672c\u533a\u522b\u5728\u4e0e\u662f\u5426\u5728\u7c7b\u5185\u65b9\u6cd5\u5916\u521b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[131],"tags":[],"_links":{"self":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2332"}],"collection":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2332"}],"version-history":[{"count":6,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2332\/revisions"}],"predecessor-version":[{"id":2338,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/2332\/revisions\/2338"}],"wp:attachment":[{"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2332"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2332"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zeroheart.xyz\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}