{"id":203177,"date":"2025-05-22T10:27:57","date_gmt":"2025-05-22T02:27:57","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203177\/"},"modified":"2025-05-22T10:27:57","modified_gmt":"2025-05-22T02:27:57","slug":"java-%e4%b8%ad%e8%8e%b7%e5%8f%96%e6%97%b6%e9%97%b4%e6%88%b3%e7%9a%84%e6%96%b9%e6%b3%95%e4%b8%ba%e4%bd%95%e5%a6%82%e6%ad%a4%e7%b9%81%e5%a4%9a%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203177\/","title":{"rendered":"Java \u4e2d\u83b7\u53d6\u65f6\u95f4\u6233\u7684\u65b9\u6cd5\u4e3a\u4f55\u5982\u6b64\u7e41\u591a\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java \u4e2d\u83b7\u53d6\u65f6\u95f4\u6233\u7684\u65b9\u6cd5\u4e3a\u4f55\u5982\u6b64\u7e41\u591a\uff1f<\/h1>\n<p><span style=\"font-size: 15px\">\u5b66\u4e60\u77e5\u8bc6\u8981\u5584\u4e8e\u601d\u8003\uff0c\u601d\u8003\uff0c\u518d\u601d\u8003\uff01\u4eca\u5929\u5c0f\u7f16\u5c31\u7ed9\u5927\u5bb6\u5e26\u6765<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava \u4e2d\u83b7\u53d6\u65f6\u95f4\u6233\u7684\u65b9\u6cd5\u4e3a\u4f55\u5982\u6b64\u7e41\u591a\uff1f\u300b<\/span>\uff0c\u4ee5\u4e0b\u5185\u5bb9\u4e3b\u8981\u5305\u542b<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6216\u51c6\u5907\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\uff0c\u5c31\u90fd\u4e0d\u8981\u9519\u8fc7\u672c\u6587\u5566~\u8ba9\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\u5427\uff0c\u80fd\u5e2e\u52a9\u5230\u4f60\u5c31\u66f4\u597d\u4e86\uff01<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241031\/1730364351672343bf53b53.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u4e2d\u83b7\u53d6\u65f6\u95f4\u6233\u7684\u65b9\u6cd5\u4e3a\u4f55\u7e41\u591a\uff1f<\/strong><\/p>\n<p>\u5f00\u53d1\u8005\u5728 Java \u4e2d\u83b7\u53d6\u5f53\u524d\u7cfb\u7edf\u65f6\u95f4\u6233\u65f6\uff0c\u4f1a\u53d1\u73b0\u6709\u591a\u79cd\u53ef\u4f9b\u9009\u62e9\u7684\u65b9\u6cd5\u3002\u8fd9\u5f15\u53d1\u4e86\u4e00\u4e2a\u7591\u95ee\uff1a\u4e3a\u4f55\u5b58\u5728\u5982\u6b64\u591a\u7684\u65b9\u6cd5\uff1f<\/p>\n<p><strong>System.currentTimeMillis() vs. new Date()<\/strong><\/p>\n<p>\u6700\u5e38\u7528\u7684\u4e24\u79cd\u65b9\u6cd5\u662f System.currentTimeMillis() \u548c new Date():<\/p>\n<ul>\n<li>System.currentTimeMillis() \u8fd4\u56de\u81ea Unix \u65f6\u95f4\u7eaa\u5143\uff081970 \u5e74 1 \u6708 1 \u65e5\u5348\u591c UTC\uff09\u4ee5\u6765\u7684\u6beb\u79d2\u6570\u3002<\/li>\n<li>new Date() \u521b\u5efa\u4e00\u4e2a Date \u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u4f7f\u7528\u7cfb\u7edf\u5f53\u524d\u65f6\u95f4\u4f5c\u4e3a\u6784\u9020\u51fd\u6570\u7684\u53c2\u6570\u3002<\/li>\n<\/ul>\n<p>\u4e4d\u4e00\u770b\uff0c\u8fd9\u4e24\u79cd\u65b9\u6cd5\u4f3c\u4e4e\u6ca1\u6709\u533a\u522b\u3002\u4f46\u662f\uff0c\u5728\u6548\u7387\u65b9\u9762\uff0cSystem.currentTimeMillis() \u66f4\u80dc\u4e00\u7b79\u3002\u5b83\u76f4\u63a5\u8fd4\u56de\u6beb\u79d2\u6570\uff0c\u800c new Date() \u5219\u9700\u8981\u521b\u5efa\u548c\u521d\u59cb\u5316\u4e00\u4e2a Date \u5bf9\u8c61\uff0c\u8fd9\u4f1a\u5e26\u6765\u989d\u5916\u7684\u5f00\u9500\u3002<\/p>\n<p><strong>\u5176\u4ed6\u65b9\u6cd5<\/strong><\/p>\n<p>\u9664 System.currentTimeMillis() \u548c new Date() \u5916\uff0c\u8fd8\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u65f6\u95f4\u6233\uff1a<\/p>\n<ul>\n<li>Calendar.getInstance().getTimeInMillis()\uff1a\u4e0e System.currentTimeMillis() \u7b49\u6548\u3002<\/li>\n<li>Instant.now().toEpochMilli()\uff1a\u8fd4\u56de\u81ea Unix \u65f6\u95f4\u7eaa\u5143\u4ee5\u6765\u7684\u6beb\u79d2\u6570\u3002<\/li>\n<li>LocalDateTime.now().toInstant(ZoneOffset.UTC).toEpochMilli()\uff1a\u8fd4\u56de\u81ea Unix \u65f6\u95f4\u7eaa\u5143\u4ee5\u6765\u7684\u6beb\u79d2\u6570\uff0c\u4f46\u8003\u8651\u4e86\u65f6\u533a\u3002<\/li>\n<\/ul>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>\u867d\u7136 Java \u4e2d\u83b7\u53d6\u65f6\u95f4\u6233\u7684\u591a\u79cd\u65b9\u6cd5\u4e4d\u4e00\u770b\u4f3c\u4e4e\u5f88\u5197\u4f59\uff0c\u4f46\u5b83\u4eec\u5728\u6548\u7387\u548c\u7528\u9014\u65b9\u9762\u6709\u6240\u4e0d\u540c\u3002\u5bf9\u4e8e\u76f4\u63a5\u83b7\u53d6\u6beb\u79d2\u6570\u7684\u9ad8\u6548\u65b9\u6cd5\uff0cSystem.currentTimeMillis() \u662f\u7406\u60f3\u9009\u62e9\u3002\u800c\u5bf9\u4e8e\u9700\u8981\u5176\u4ed6\u529f\u80fd\u7684\u5e94\u7528\u7a0b\u5e8f\uff08\u5982\u65f6\u533a\u611f\u77e5\uff09\uff0c\u5176\u4ed6\u65b9\u6cd5\u53ef\u80fd\u66f4\u5408\u9002\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300aJava \u4e2d\u83b7\u53d6\u65f6\u95f4\u6233\u7684\u65b9\u6cd5\u4e3a\u4f55\u5982\u6b64\u7e41\u591a\uff1f\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u4e2d\u83b7\u53d6\u65f6\u95f4\u6233\u7684\u65b9\u6cd5\u4e3a\u4f55&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203177","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203177"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203177\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}