{"id":5236,"date":"2021-07-04T10:22:29","date_gmt":"2021-07-04T02:22:29","guid":{"rendered":"https:\/\/www.xttblog.com\/?p=5236"},"modified":"2021-07-04T10:22:29","modified_gmt":"2021-07-04T02:22:29","slug":"java%e4%b8%ad%e5%a6%82%e4%bd%95%e8%8e%b7%e5%8f%96%e5%bd%93%e5%89%8d%e6%97%a5%e6%9c%9f%e5%92%8c%e6%97%b6%e9%97%b4%e7%9a%844%e7%a7%8d%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=5236","title":{"rendered":"Java\u4e2d\u5982\u4f55\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\u76844\u79cd\u65b9\u6cd5"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u6700\u8fd1\u7fa4\u91cc\u6709\u4e00\u4f4d C \u8f6c Java \u7684\u7f51\u53cb\uff0c\u95ee\u5230\u201cJava\u5982\u4f55\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\u201d\u8fd9\u4e2a\u95ee\u9898\uff0c\u77e5\u8bc6\u867d\u7136\u57fa\u7840\uff0c\u4f46\u5927\u90e8\u5206\u7f51\u53cb\u53ea\u8bb0\u5f97 Java8 \u4ee5\u524d\u7684\u7528\u6cd5\u3002\u672c\u6587\u603b\u7ed3\u4e86 4 \u79cd\u65b9\u6cd5\uff0c\u5176\u4e2d\u7b2c 4 \u79cd\u662f Java8 \u624d\u63d0\u4f9b\u7684 API\u3002<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/cdn.jsdelivr.net\/gh\/xmt1139057136\/xttblog\/2021\/07\/java8_date.jpeg\" alt=\"\" \/><figcaption>Java\u5982\u4f55\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u672c\u7bc7\u535a\u5ba2\u4e3b\u8981\u603b\u7ed3 Java \u91cc\u9762\u5173\u4e8e\u83b7\u53d6\u5f53\u524d\u65f6\u95f4\u7684\u4e00\u4e9b\u65b9\u6cd5\uff0c\u5206\u4eab\u7ed9\u521d\u5b66\u8005\uff0c\u4f1a\u7684\u540c\u5b66\u5ffd\u7565\u672c\u6587\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">System.currentTimeMillis()<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u83b7\u53d6\u6807\u51c6\u65f6\u95f4\u53ef\u4ee5\u901a\u8fc7System.currentTimeMillis()\u65b9\u6cd5\u83b7\u53d6\uff0c\u6b64\u65b9\u6cd5\u4e0d\u53d7\u65f6\u533a\u5f71\u54cd\uff0c\u5f97\u5230\u7684\u7ed3\u679c\u662f\u65f6\u95f4\u6233\u683c\u5f0f\u7684\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>1543105352845\u00a0\u00a0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u53ef\u4ee5\u5c06\u65f6\u95f4\u6233\u8f6c\u5316\u6210\u6211\u4eec\u6613\u4e8e\u7406\u89e3\u7684\u683c\u5f0f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SimpleDateFormat\u00a0formatter=\u00a0new\u00a0SimpleDateFormat(\"yyyy-MM-dd\u00a0'at'\u00a0HH:mm:ss\u00a0z\");\nDate\u00a0date\u00a0=\u00a0new\u00a0Date(System.currentTimeMillis());\nSystem.out.println(formatter.format(date));<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5219\u8be5\u65f6\u95f4\u6233\u5bf9\u5e94\u7684\u65f6\u95f4\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>2018-11-25\u00a0at\u00a001:22:12\u00a0CET<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u6b64\u65b9\u6cd5\u4f1a\u6839\u636e\u6211\u4eec\u7684\u7cfb\u7edf\u65f6\u95f4\u8fd4\u56de\u5f53\u524d\u503c\uff0c\u56e0\u4e3a\u4e16\u754c\u5404\u5730\u7684\u65f6\u533a\u662f\u4e0d\u4e00\u6837\u7684\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">java.util.Date<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 Java \u4e2d\uff0c\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u4e4b\u4e00\u5c31\u662f\u76f4\u63a5\u5b9e\u4f8b\u5316\u4f4d\u4e8e Java \u5305 java.util \u7684 Date \u7c7b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Date\u00a0date\u00a0=\u00a0new\u00a0Date();\u00a0\n\/\/\u00a0this\u00a0object\u00a0contains\u00a0the\u00a0current\u00a0date\u00a0value\u00a0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u9762\u83b7\u53d6\u5230\u7684\u65e5\u671f\u4e5f\u53ef\u4ee5\u88abformat\u6210\u6211\u4eec\u9700\u8981\u7684\u683c\u5f0f\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SimpleDateFormat\u00a0formatter\u00a0=\u00a0new\u00a0SimpleDateFormat(\"dd-MM-yyyy\u00a0HH:mm:ss\");\u00a0\u00a0\nSystem.out.println(formatter.format(date));\u00a0\u00a0<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Calendar API<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Calendar \u7c7b\uff0c\u4e13\u95e8\u7528\u4e8e\u8f6c\u6362\u7279\u5b9a\u65f6\u523b\u548c\u65e5\u5386\u5b57\u6bb5\u4e4b\u95f4\u7684\u65e5\u671f\u548c\u65f6\u95f4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528 Calendar \u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\u975e\u5e38\u7b80\u5355\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Calendar\u00a0calendar\u00a0=\u00a0Calendar.getInstance();\u00a0\n\/\/\u00a0get\u00a0current\u00a0instance\u00a0of\u00a0the\u00a0calendar\u00a0\u00a0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0e date \u4e00\u6837\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u975e\u5e38\u8f7b\u677e\u5730 format \u8fd9\u4e2a\u65e5\u671f\u6210\u6211\u4eec\u9700\u8981\u7684\u683c\u5f0f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SimpleDateFormat\u00a0formatter\u00a0=\u00a0new\u00a0SimpleDateFormat(\"dd-MM-yyyy\u00a0HH:mm:ss\");\u00a0\u00a0\nSystem.out.println(formatter.format(calendar.getTime()));\u00a0\u00a0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u9762\u4ee3\u7801\u6253\u5370\u7684\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>25-11-2018\u00a000:43:39<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Date\/Time API<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java 8 \u63d0\u4f9b\u4e86\u4e00\u4e2a\u5168\u65b0\u7684 API\uff0c\u7528\u4ee5\u66ff\u6362 java.util.Date \u548c java.util.Calendar\u3002Date \/ Time API \u63d0\u4f9b\u4e86\u591a\u4e2a\u7c7b\uff0c\u5e2e\u52a9\u6211\u4eec\u6765\u5b8c\u6210\u5de5\u4f5c\uff0c\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>LocalDate<\/li><li>LocalTime<\/li><li>LocalDateTime<\/li><li>ZonedDateTime<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">LocalDate<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">LocalDate \u53ea\u662f\u4e00\u4e2a\u65e5\u671f\uff0c\u6ca1\u6709\u65f6\u95f4\u3002 \u8fd9\u610f\u5473\u7740\u6211\u4eec\u53ea\u80fd\u83b7\u5f97\u5f53\u524d\u65e5\u671f\uff0c\u4f46\u6ca1\u6709\u4e00\u5929\u7684\u5177\u4f53\u65f6\u95f4\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>LocalDate\u00a0date\u00a0=\u00a0LocalDate.now();\u00a0\/\/\u00a0get\u00a0the\u00a0current\u00a0date\u00a0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u53ef\u4ee5 format \u5b83\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DateTimeFormatter\u00a0formatter\u00a0=\u00a0DateTimeFormatter.ofPattern(\"dd-MM-yyyy\");\u00a0\u00a0\nSystem.out.println(date.format(formatter));\u00a0\u00a0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f97\u5230\u7684\u7ed3\u679c\u53ea\u6709\u5e74\u6708\u65e5\uff0c\u4f8b\u5982:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>25-11-2018\u00a0<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">LocalTime<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">LocalTime \u4e0e LocalDate \u76f8\u53cd\uff0c\u5b83\u53ea\u4ee3\u8868\u4e00\u4e2a\u65f6\u95f4\uff0c\u6ca1\u6709\u65e5\u671f\u3002 \u8fd9\u610f\u5473\u7740\u6211\u4eec\u53ea\u80fd\u83b7\u5f97\u5f53\u5929\u7684\u5f53\u524d\u65f6\u95f4\uff0c\u800c\u4e0d\u662f\u5b9e\u9645\u65e5\u671f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>LocalTime\u00a0time\u00a0=\u00a0LocalTime.now();\u00a0\/\/\u00a0get\u00a0the\u00a0current\u00a0time\u00a0\u00a0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u6309\u5982\u4e0b\u65b9\u5f0f format\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DateTimeFormatter\u00a0formatter\u00a0=\u00a0DateTimeFormatter.ofPattern(\"HH:mm:ss\");\u00a0\u00a0\nSystem.out.println(time.format(formatter));\u00a0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f97\u5230\u7684\u7ed3\u679c\u7c7b\u4f3c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>00:55:58\u00a0\u00a0<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">LocalDateTime<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\u4e00\u4e2a\u662f LocalDateTime\uff0c\u4e5f\u662f Java \u4e2d\u6700\u5e38\u7528\u7684 Date \/ Time \u7c7b\uff0c\u4ee3\u8868\u524d\u4e24\u4e2a\u7c7b\u7684\u7ec4\u5408 &#8211; \u5373\u65e5\u671f\u548c\u65f6\u95f4\u7684\u503c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>LocalDateTime\u00a0dateTime\u00a0=\u00a0LocalDateTime.now();\u00a0\/\/\u00a0get\u00a0the\u00a0current\u00a0date\u00a0and\u00a0time\u00a0\u00a0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">format \u7684\u65b9\u5f0f\u4e5f\u4e00\u6837\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DateTimeFormatter\u00a0formatter\u00a0=\u00a0DateTimeFormatter.ofPattern(\"dd-MM-yyyy\u00a0HH:mm:ss\");\u00a0\u00a0\nSystem.out.println(dateTime.format(formatter));\u00a0\u00a0<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f97\u5230\u7684\u65e5\u671f\u7ed3\u679c\u7c7b\u4f3c\u4e8e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>25-11-2018\u00a000:57:20\u00a0\u00a0<\/code><\/pre>\n<!-- <audio autoplay=\"autoplay\" height=\"100\" width=\"100\" hidden=\"true\"><source src=\"https:\/\/c.coka.la\/orAvPR.mp3\" type=\"audio\/mp3\"\/><\/audio><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/ws3.sinaimg.cn\/large\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/> --><p><!-- <img decoding=\"async\" src=\"https:\/\/raw.githubusercontent.com\/xmt1139057136\/xttblog\/master\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/>--><img decoding=\"async\" src=\"https:\/\/saas.51autoparts.cn\/api\/admin\/sys-file\/oss\/file?fileName=84db51f8561e448f9a4fda2eff0811f9.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/><\/p><p>\u6700\u540e\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u4e2a\u4eba\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a\u4e1a\u4f59\u8349\uff08yyucao\uff09\uff01<b>\u53ef\u52a0\u4f5c\u8005\u5fae\u4fe1\u53f7\uff1a<font color=\"red\">xttblog2<\/font>\u3002\u5907\u6ce8\uff1a\u201c1\u201d\uff0c\u6dfb\u52a0\u535a\u4e3b\u5fae\u4fe1\u62c9\u4f60\u8fdb\u5fae\u4fe1\u7fa4\u3002\u5907\u6ce8\u9519\u8bef\u4e0d\u4f1a\u540c\u610f\u597d\u53cb\u7533\u8bf7\u3002<\/b>\u518d\u6b21\u611f\u8c22\u60a8\u7684\u5173\u6ce8\uff01\u540e\u7eed\u6709\u7cbe\u5f69\u5185\u5bb9\u4f1a\u7b2c\u4e00\u65f6\u95f4\u53d1\u7ed9\u60a8\uff01\u539f\u521b\u6587\u7ae0\u6295\u7a3f\u8bf7\u53d1\u9001\u81f3532009913@qq.com\u90ae\u7bb1\u3002\u5546\u52a1\u5408\u4f5c\u4e5f\u53ef\u6dfb\u52a0\u4f5c\u8005\u5fae\u4fe1\u8fdb\u884c\u8054\u7cfb\uff01<\/p><p>\u672c\u6587\u539f\u6587\u51fa\u5904\uff1a<a href=\"https:\/\/www.xttblog.com\">\u4e1a\u4f59\u8349<\/a>\uff1a &raquo; <a href=\"https:\/\/www.xttblog.com\/?p=5236\">Java\u4e2d\u5982\u4f55\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\u76844\u79cd\u65b9\u6cd5<\/a><\/p><!-- <div class=\"bd-reward-stl\"><button id=\"bdRewardBtn\"><span><\/span><\/button><\/div> -->","protected":false},"excerpt":{"rendered":"<p>\u6700\u8fd1\u7fa4\u91cc\u6709\u4e00\u4f4d C \u8f6c Java \u7684\u7f51\u53cb\uff0c\u95ee\u5230\u201cJava\u5982\u4f55\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\u201d\u8fd9\u4e2a\u95ee\u9898\uff0c\u77e5\u8bc6\u867d\u7136\u57fa\u7840\uff0c\u4f46\u5927\u90e8 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[257,1484,1727,258,259],"class_list":["post-5236","post","type-post","status-publish","format-standard","hentry","category-java","tag-datetimepicker","tag-date_format","tag-java8","tag-js"],"_links":{"self":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/5236","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5236"}],"version-history":[{"count":1,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/5236\/revisions"}],"predecessor-version":[{"id":5237,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/5236\/revisions\/5237"}],"wp:attachment":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5236"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}