{"id":2232,"date":"2018-02-09T16:35:29","date_gmt":"2018-02-09T08:35:29","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=2232"},"modified":"2024-05-14T16:58:06","modified_gmt":"2024-05-14T08:58:06","slug":"java-8%e6%96%b0%e7%89%b9%e6%80%a7-%e6%97%a5%e6%9c%9f%e5%92%8c%e6%97%b6%e9%97%b4%e5%ae%9e%e7%94%a8%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=2232","title":{"rendered":"Java 8\u65b0\u7279\u6027-\u65e5\u671f\u548c\u65f6\u95f4\u5b9e\u7528\u6280\u5de7"},"content":{"rendered":"<p>\u5f53\u4f60\u5f00\u59cb\u4f7f\u7528Java\u64cd\u4f5c\u65e5\u671f\u548c\u65f6\u95f4\u7684\u65f6\u5019\uff0c\u4f1a\u6709\u4e00\u4e9b\u68d8\u624b\u3002\u4f60\u4e5f\u8bb8\u4f1a\u901a\u8fc7<b>System.currentTimeMillis()<\/b><br \/>\n\u6765\u8fd4\u56de1970\u5e741\u67081\u65e5\u5230\u4eca\u5929\u7684\u6beb\u79d2\u6570\u3002\u6216\u8005\u4f7f\u7528Date\u7c7b\u6765\u64cd\u4f5c\u65e5\u671f\uff1b\u5f53\u9047\u5230\u52a0\u51cf\u6708\u4efd\u3001\u5929\u6570\u7684\u65f6\u5019<br \/>\n\u4f60\u53c8\u9700\u8981\u7528\u5230Calendar\u7c7b\uff1b\u5f53\u9700\u8981\u683c\u5f0f\u5316\u65e5\u671f\u7684\u65f6\u5019\u9700\u8981\u4f7f\u7528java.text.DateFormat\u7c7b\u3002<br \/>\n\u603b\u800c\u8a00\u4e4b\u5728Java\u4e2d\u64cd\u4f5c\u65e5\u671f\u4e0d\u662f\u5f88\u65b9\u4fbf\uff0c\u4ee5\u81f3\u4e8e\u5f88\u591a\u5f00\u53d1\u8005\u4e0d\u5f97\u4e0d\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\uff0c\u6bd4\u5982:&nbsp;<a class=\" wrap external\" href=\"https:\/\/link.zhihu.com\/?target=http%3A\/\/joda-time.sourceforge.net\/\" target=\"_blank\" rel=\"nofollow noreferrer noopener\" data-za-detail-view-id=\"1043\">joda-time<\/a><\/p>\n<h2>\u73b0\u6709API\u5b58\u5728\u7684\u95ee\u9898<\/h2>\n<ul>\n<li>\u7ebf\u7a0b\u5b89\u5168: Date\u548cCalendar\u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u4f60\u9700\u8981\u7f16\u5199\u989d\u5916\u7684\u4ee3\u7801\u5904\u7406\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898<\/li>\n<li>API\u8bbe\u8ba1\u548c\u6613\u7528\u6027: \u7531\u4e8eDate\u548cCalendar\u7684\u8bbe\u8ba1\u4e0d\u5f53\u4f60\u65e0\u6cd5\u5b8c\u6210\u65e5\u5e38\u7684\u65e5\u671f\u64cd\u4f5c<\/li>\n<li>ZonedDate\u548cTime: \u4f60\u5fc5\u987b\u7f16\u5199\u989d\u5916\u7684\u903b\u8f91\u5904\u7406\u65f6\u533a\u548c\u90a3\u4e9b\u65e7\u7684\u903b\u8f91<\/li>\n<\/ul>\n<p>\u597d\u5728<a class=\" wrap external\" href=\"https:\/\/link.zhihu.com\/?target=http%3A\/\/jcp.org\/en\/jsr\/detail%3Fid%3D310\" target=\"_blank\" rel=\"nofollow noreferrer noopener\" data-za-detail-view-id=\"1043\">JSR 310<\/a>\u89c4\u8303\u4e2d\u4e3aJava8\u6dfb\u52a0\u4e86\u65b0\u7684API\uff0c<br \/>\n\u5728java.time\u5305\u4e2d\uff0c\u65b0\u7684API\u7ea0\u6b63\u4e86\u8fc7\u53bb\u7684\u7f3a\u9677\uff0c<\/p>\n<h2>\u65b0\u7684\u65e5\u671fAPI<\/h2>\n<ul>\n<li>ZoneId: \u65f6\u533aID\uff0c\u7528\u6765\u786e\u5b9aInstant\u548cLocalDateTime\u4e92\u76f8\u8f6c\u6362\u7684\u89c4\u5219<\/li>\n<li>Instant: \u7528\u6765\u8868\u793a\u65f6\u95f4\u7ebf\u4e0a\u7684\u4e00\u4e2a\u70b9<\/li>\n<li>LocalDate: \u8868\u793a\u6ca1\u6709\u65f6\u533a\u7684\u65e5\u671f, LocalDate\u662f\u4e0d\u53ef\u53d8\u5e76\u4e14\u7ebf\u7a0b\u5b89\u5168\u7684<\/li>\n<li>LocalTime: \u8868\u793a\u6ca1\u6709\u65f6\u533a\u7684\u65f6\u95f4, LocalTime\u662f\u4e0d\u53ef\u53d8\u5e76\u4e14\u7ebf\u7a0b\u5b89\u5168\u7684<\/li>\n<li>LocalDateTime: \u8868\u793a\u6ca1\u6709\u65f6\u533a\u7684\u65e5\u671f\u65f6\u95f4, LocalDateTime\u662f\u4e0d\u53ef\u53d8\u5e76\u4e14\u7ebf\u7a0b\u5b89\u5168\u7684<\/li>\n<li>Clock: \u7528\u4e8e\u8bbf\u95ee\u5f53\u524d\u65f6\u523b\u3001\u65e5\u671f\u3001\u65f6\u95f4\uff0c\u7528\u5230\u65f6\u533a<\/li>\n<li>Duration: \u7528\u79d2\u548c\u7eb3\u79d2\u8868\u793a\u65f6\u95f4\u7684\u6570\u91cf<\/li>\n<\/ul>\n<p>\u6700\u5e38\u7528\u7684\u5c31\u662fLocalDate\u3001LocalTime\u3001LocalDateTime\u4e86\uff0c\u4ece\u5b83\u4eec\u7684\u540d\u5b57\u5c31\u53ef\u4ee5\u770b\u51fa\u662f\u64cd\u4f5c\u65e5\u671f<br \/>\n\u548c\u65f6\u95f4\u7684\u3002\u8fd9\u4e9b\u7c7b\u662f\u4e3b\u8981\u7528\u4e8e\u5f53\u65f6\u533a\u4e0d\u9700\u8981\u663e\u5f0f\u5730\u6307\u5b9a\u7684\u4e0a\u4e0b\u6587\u3002\u5728\u672c\u7ae0\u8282\u4e2d\u6211\u4eec\u5c06\u8ba8\u8bba\u6700\u5e38\u7528\u7684api\u3002<\/p>\n<h2>LocalDate<\/h2>\n<p>LocalDate\u4ee3\u8868\u4e00\u4e2aIOS\u683c\u5f0f(yyyy-MM-dd)\u7684\u65e5\u671f\uff0c\u53ef\u4ee5\u5b58\u50a8 \u751f\u65e5\u3001\u7eaa\u5ff5\u65e5\u7b49\u65e5\u671f\u3002<br \/>\n\u83b7\u53d6\u5f53\u524d\u7684\u65e5\u671f\uff1a<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalDate<\/span> <span class=\"n\">localDate<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">();<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"localDate: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">localDate<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u8f93\u51fa<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"nl\">localDate:<\/span> <span class=\"mi\">2017<\/span><span class=\"o\">-<\/span><span class=\"mo\">07<\/span><span class=\"o\">-<\/span><span class=\"mi\">20<\/span>\n<\/code><\/pre>\n<\/div>\n<p>LocalDate\u53ef\u4ee5\u6307\u5b9a\u7279\u5b9a\u7684\u65e5\u671f\uff0c\u8c03\u7528of\u6216parse\u65b9\u6cd5\u8fd4\u56de\u8be5\u5b9e\u4f8b\uff1a<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">2017<\/span><span class=\"o\">,<\/span> <span class=\"mo\">07<\/span><span class=\"o\">,<\/span> <span class=\"mi\">20<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2017-07-20\"<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u5f53\u7136\u5b83\u8fd8\u6709\u4e00\u4e9b\u5176\u4ed6\u65b9\u6cd5\uff0c\u6211\u4eec\u4e00\u8d77\u6765\u770b\u770b\uff1a<\/p>\n<p><b>\u4e3a\u4eca\u5929\u6dfb\u52a0\u4e00\u5929\uff0c\u4e5f\u5c31\u662f\u83b7\u53d6\u660e\u5929<\/b><\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalDate<\/span> <span class=\"n\">tomorrow<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">().<\/span><span class=\"na\">plusDays<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p><b>\u4ece\u4eca\u5929\u51cf\u53bb\u4e00\u4e2a\u6708<\/b><\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalDate<\/span> <span class=\"n\">prevMonth<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">().<\/span><span class=\"na\">minus<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"n\">ChronoUnit<\/span><span class=\"o\">.<\/span><span class=\"na\">MONTHS<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u4e0b\u9762\u5199\u4e24\u4e2a\u4f8b\u5b50\uff0c\u5206\u522b\u89e3\u6790\u65e5\u671f&nbsp;<b>2017-07-20<\/b>\uff0c\u83b7\u53d6\u6bcf\u5468\u4e2d\u7684\u661f\u671f\u548c\u6bcf\u6708\u4e2d\u7684\u65e5\uff1a<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">DayOfWeek<\/span> <span class=\"n\">thursday<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2017-07-20\"<\/span><span class=\"o\">).<\/span><span class=\"na\">getDayOfWeek<\/span><span class=\"o\">();<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u5468\u56db: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">thursday<\/span><span class=\"o\">);<\/span>\n<span class=\"kt\">int<\/span> <span class=\"n\">twenty<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2017-07-20\"<\/span><span class=\"o\">).<\/span><span class=\"na\">getDayOfMonth<\/span><span class=\"o\">();<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"twenty: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">twenty<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u8bd5\u8bd5\u4eca\u5e74\u662f\u4e0d\u662f\u95f0\u5e74:<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"kt\">boolean<\/span> <span class=\"n\">leapYear<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">().<\/span><span class=\"na\">isLeapYear<\/span><span class=\"o\">();<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u662f\u5426\u95f0\u5e74: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">leapYear<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u5224\u65ad\u662f\u5426\u5728\u65e5\u671f\u4e4b\u524d\u6216\u4e4b\u540e:<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"kt\">boolean<\/span> <span class=\"n\">notBefore<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2017-07-20\"<\/span><span class=\"o\">)<\/span>\n                <span class=\"o\">.<\/span><span class=\"na\">isBefore<\/span><span class=\"o\">(<\/span><span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2017-07-22\"<\/span><span class=\"o\">));<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"notBefore: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">notBefore<\/span><span class=\"o\">);<\/span>\n<span class=\"kt\">boolean<\/span> <span class=\"n\">isAfter<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2017-07-20\"<\/span><span class=\"o\">).<\/span><span class=\"na\">isAfter<\/span><span class=\"o\">(<\/span><span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2017-07-22\"<\/span><span class=\"o\">));<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"isAfter: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">isAfter<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u83b7\u53d6\u8fd9\u4e2a\u6708\u7684\u7b2c\u4e00\u5929:<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalDate<\/span> <span class=\"n\">firstDayOfMonth<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2017-07-20\"<\/span><span class=\"o\">)<\/span>\n                <span class=\"o\">.<\/span><span class=\"na\">with<\/span><span class=\"o\">(<\/span><span class=\"n\">TemporalAdjusters<\/span><span class=\"o\">.<\/span><span class=\"na\">firstDayOfMonth<\/span><span class=\"o\">());<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u8fd9\u4e2a\u6708\u7684\u7b2c\u4e00\u5929: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">firstDayOfMonth<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">firstDayOfMonth<\/span> <span class=\"o\">=<\/span> <span class=\"n\">firstDayOfMonth<\/span><span class=\"o\">.<\/span><span class=\"na\">withDayOfMonth<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u8fd9\u4e2a\u6708\u7684\u7b2c\u4e00\u5929: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">firstDayOfMonth<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u5224\u65ad\u4eca\u5929\u662f\u5426\u662f\u6211\u7684\u751f\u65e5\uff0c\u4f8b\u5982\u6211\u7684\u751f\u65e5\u662f&nbsp;<b>2009-07-20<\/b><\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalDate<\/span> <span class=\"n\">birthday<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">2009<\/span><span class=\"o\">,<\/span> <span class=\"mo\">07<\/span><span class=\"o\">,<\/span> <span class=\"mi\">20<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">MonthDay<\/span> <span class=\"n\">birthdayMd<\/span> <span class=\"o\">=<\/span> <span class=\"n\">MonthDay<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"n\">birthday<\/span><span class=\"o\">.<\/span><span class=\"na\">getMonth<\/span><span class=\"o\">(),<\/span> <span class=\"n\">birthday<\/span><span class=\"o\">.<\/span><span class=\"na\">getDayOfMonth<\/span><span class=\"o\">());<\/span>\n<span class=\"n\">MonthDay<\/span> <span class=\"n\">today<\/span> <span class=\"o\">=<\/span> <span class=\"n\">MonthDay<\/span><span class=\"o\">.<\/span><span class=\"na\">from<\/span><span class=\"o\">(<\/span><span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">());<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u4eca\u5929\u662f\u5426\u662f\u6211\u7684\u751f\u65e5: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">today<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">birthdayMd<\/span><span class=\"o\">));<\/span>\n<\/code><\/pre>\n<\/div>\n<h2>LocalTime<\/h2>\n<p>LocalTime\u8868\u793a\u4e00\u4e2a\u65f6\u95f4\uff0c\u800c\u4e0d\u662f\u65e5\u671f\uff0c\u4e0b\u9762\u4ecb\u7ecd\u4e00\u4e0b\u5b83\u7684\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<p>\u83b7\u53d6\u73b0\u5728\u7684\u65f6\u95f4\uff0c\u8f93\u51fa<b>15:01:22.144<\/b><\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalTime<\/span> <span class=\"n\">now<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalTime<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">();<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u73b0\u5728\u7684\u65f6\u95f4: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">now<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u5c06\u4e00\u4e2a\u5b57\u7b26\u4e32\u65f6\u95f4\u89e3\u6790\u4e3a<b>LocalTime<\/b>\uff0c\u8f93\u51fa15:02<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalTime<\/span> <span class=\"n\">nowTime<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalTime<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"15:02\"<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u65f6\u95f4\u662f: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">nowTime<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u4f7f\u7528\u9759\u6001\u65b9\u6cd5<b>of<\/b>\u521b\u5efa\u4e00\u4e2a\u65f6\u95f4<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalTime<\/span> <span class=\"n\">nowTime<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalTime<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">15<\/span><span class=\"o\">,<\/span> <span class=\"mo\">02<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u65f6\u95f4\u662f: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">nowTime<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u4f7f\u7528\u89e3\u6790\u5b57\u7b26\u4e32\u7684\u65b9\u5f0f\u5e76\u6dfb\u52a0\u4e00\u5c0f\u65f6\uff0c\u8f93\u51fa<b>16:02<\/b><\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalTime<\/span> <span class=\"n\">nextHour<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalTime<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"15:02\"<\/span><span class=\"o\">).<\/span><span class=\"na\">plus<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"n\">ChronoUnit<\/span><span class=\"o\">.<\/span><span class=\"na\">HOURS<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u4e0b\u4e00\u4e2a\u5c0f\u65f6: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">nextHour<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u83b7\u53d6\u65f6\u95f4\u7684\u5c0f\u65f6\u3001\u5206\u949f<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"kt\">int<\/span> <span class=\"n\">hour<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalTime<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"15:02\"<\/span><span class=\"o\">).<\/span><span class=\"na\">getHour<\/span><span class=\"o\">();<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u5c0f\u65f6: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">hour<\/span><span class=\"o\">);<\/span>\n<span class=\"kt\">int<\/span> <span class=\"n\">minute<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalTime<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"15:02\"<\/span><span class=\"o\">).<\/span><span class=\"na\">getMinute<\/span><span class=\"o\">();<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u5206\u949f: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">minute<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u6211\u4eec\u4e5f\u53ef\u4ee5\u901a\u8fc7\u4e4b\u524d\u7c7b\u4f3c\u7684API\u68c0\u67e5\u4e00\u4e2a\u65f6\u95f4\u662f\u5426\u5728\u53e6\u4e00\u4e2a\u65f6\u95f4\u4e4b\u524d\u3001\u4e4b\u540e<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"kt\">boolean<\/span> <span class=\"n\">isBefore<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalTime<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"15:02\"<\/span><span class=\"o\">).<\/span><span class=\"na\">isBefore<\/span><span class=\"o\">(<\/span><span class=\"n\">LocalTime<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"16:02\"<\/span><span class=\"o\">));<\/span>\n<span class=\"kt\">boolean<\/span> <span class=\"n\">isAfter<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalTime<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"15:02\"<\/span><span class=\"o\">).<\/span><span class=\"na\">isAfter<\/span><span class=\"o\">(<\/span><span class=\"n\">LocalTime<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"16:02\"<\/span><span class=\"o\">));<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"isBefore: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">isBefore<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"isAfter: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">isAfter<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u8f93\u51fa<b>&nbsp;isBefore: true, isAfter: false<\/b>\u3002<\/p>\n<p>\u5728LocalTime\u7c7b\u4e2d\u4e5f\u5c06\u6bcf\u5929\u7684\u5f00\u59cb\u548c\u7ed3\u675f\u4f5c\u4e3a\u5e38\u91cf\u4f9b\u6211\u4eec\u4f7f\u7528:<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">LocalTime<\/span><span class=\"o\">.<\/span><span class=\"na\">MAX<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">LocalTime<\/span><span class=\"o\">.<\/span><span class=\"na\">MIN<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u8f93\u51fa:<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-bash\">23:59:59.999999999\n00:00\n<\/code><\/pre>\n<\/div>\n<p>LocalTime\u5c31\u8fd9\u4e9b\u4e86\uff0c\u4e0b\u9762\u6211\u4eec\u6765\u4e86\u89e3\u4e00\u4e0bLocalDateTime<\/p>\n<h2>LocalDateTime<\/h2>\n<p>LocalDateTime\u662f\u7528\u6765\u8868\u793a\u65e5\u671f\u548c\u65f6\u95f4\u7684\uff0c\u8fd9\u662f\u4e00\u4e2a\u6700\u5e38\u7528\u7684\u7c7b\u4e4b\u4e00\u3002<\/p>\n<p>\u83b7\u53d6\u5f53\u524d\u7684\u65e5\u671f\u548c\u65f6\u95f4:<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalDateTime<\/span> <span class=\"n\">now<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDateTime<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">();<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u73b0\u5728: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">now<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u8f93\u51fa<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"nl\">\u73b0\u5728:<\/span> <span class=\"mi\">2017<\/span><span class=\"o\">-<\/span><span class=\"mo\">07<\/span><span class=\"o\">-<\/span><span class=\"mi\">20<\/span><span class=\"n\">T15<\/span><span class=\"o\">:<\/span><span class=\"mi\">17<\/span><span class=\"o\">:<\/span><span class=\"mf\">19.926<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u4e0b\u9762\u4f7f\u7528\u9759\u6001\u65b9\u6cd5\u548c\u5b57\u7b26\u4e32\u7684\u65b9\u5f0f\u5206\u522b\u521b\u5efa&nbsp;<b>LocalDateTime&nbsp;<\/b>\u5bf9\u8c61<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalDateTime<\/span><span class=\"o\">.<\/span><span class=\"na\">of<\/span><span class=\"o\">(<\/span><span class=\"mi\">2017<\/span><span class=\"o\">,<\/span> <span class=\"n\">Month<\/span><span class=\"o\">.<\/span><span class=\"na\">JULY<\/span><span class=\"o\">,<\/span> <span class=\"mi\">20<\/span><span class=\"o\">,<\/span> <span class=\"mi\">15<\/span><span class=\"o\">,<\/span> <span class=\"mi\">18<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">LocalDateTime<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2017-07-20T15:18:00\"<\/span><span class=\"o\">);<\/span>\n<span class=\"err\">``<\/span>\n<span class=\"n\">\u540c\u65f6<\/span><span class=\"err\">`<\/span><span class=\"n\">LocalDateTime<\/span><span class=\"err\">`<\/span><span class=\"n\">\u4e5f\u63d0\u4f9b\u4e86\u76f8\u5173API\u6765\u5bf9\u65e5\u671f\u548c\u65f6\u95f4\u8fdb\u884c\u589e\u51cf\u64cd\u4f5c<\/span><span class=\"o\">:<\/span>\n<span class=\"err\">```<\/span><span class=\"n\">java<\/span>\n<span class=\"n\">LocalDateTime<\/span> <span class=\"n\">tomorrow<\/span> <span class=\"o\">=<\/span> <span class=\"n\">now<\/span><span class=\"o\">.<\/span><span class=\"na\">plusDays<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u660e\u5929\u7684\u8fd9\u4e2a\u65f6\u95f4: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">tomorrow<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">LocalDateTime<\/span> <span class=\"n\">minusTowHour<\/span> <span class=\"o\">=<\/span> <span class=\"n\">now<\/span><span class=\"o\">.<\/span><span class=\"na\">minusHours<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u4e24\u5c0f\u65f6\u524d: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">minusTowHour<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u8fd9\u4e2a\u7c7b\u4e5f\u63d0\u4f9b\u4e00\u7cfb\u5217\u7684get\u65b9\u6cd5\u6765\u83b7\u53d6\u7279\u5b9a\u5355\u4f4d:<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">Month<\/span> <span class=\"n\">month<\/span> <span class=\"o\">=<\/span> <span class=\"n\">now<\/span><span class=\"o\">.<\/span><span class=\"na\">getMonth<\/span><span class=\"o\">();<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u5f53\u524d\u6708\u4efd: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">month<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<h2>\u65e5\u671f\u683c\u5f0f\u5316<\/h2>\n<p>\u5728\u65e5\u5e38\u5f00\u53d1\u4e2d\u6211\u4eec\u7528\u5230\u6700\u591a\u7684\u4e5f\u8bb8\u5c31\u662f\u65e5\u671f\u3001\u65f6\u95f4\u7684\u683c\u5f0f\u5316\u4e86\uff0c\u90a3\u5728Java8\u79cd\u8be5\u5982\u4f55\u64cd\u4f5c\u5462\uff1f<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalDateTime<\/span> <span class=\"n\">now<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDateTime<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">();<\/span>\n<span class=\"n\">DateTimeFormatter<\/span> <span class=\"n\">dateTimeFormatter<\/span> <span class=\"o\">=<\/span> <span class=\"n\">DateTimeFormatter<\/span><span class=\"o\">.<\/span><span class=\"na\">ofPattern<\/span><span class=\"o\">(<\/span><span class=\"s\">\"yyyy-MM-dd HH:mm:ss\"<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u9ed8\u8ba4\u683c\u5f0f\u5316: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">now<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u81ea\u5b9a\u4e49\u683c\u5f0f\u5316: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">now<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"n\">dateTimeFormatter<\/span><span class=\"o\">));<\/span>\n<span class=\"n\">LocalDateTime<\/span> <span class=\"n\">localDateTime<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDateTime<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2017-07-20 15:27:44\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">dateTimeFormatter<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u5b57\u7b26\u4e32\u8f6cLocalDateTime: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">localDateTime<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u4e5f\u53ef\u4ee5\u4f7f\u7528<b>DateTimeFormatter<\/b>\u7684<b>format<\/b>\u65b9\u6cd5\u5c06\u65e5\u671f\u3001\u65f6\u95f4\u683c\u5f0f\u5316\u4e3a\u5b57\u7b26\u4e32<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">DateTimeFormatter<\/span> <span class=\"n\">dateTimeFormatter<\/span> <span class=\"o\">=<\/span> <span class=\"n\">DateTimeFormatter<\/span><span class=\"o\">.<\/span><span class=\"na\">ofPattern<\/span><span class=\"o\">(<\/span><span class=\"s\">\"yyyy-MM-dd\"<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">String<\/span> <span class=\"n\">dateString<\/span> <span class=\"o\">=<\/span> <span class=\"n\">dateTimeFormatter<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">());<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u65e5\u671f\u8f6c\u5b57\u7b26\u4e32: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">dateString<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<h2>\u65e5\u671f\u5468\u671f<\/h2>\n<p><b>Period<\/b>\u7c7b\u7528\u4e8e\u4fee\u6539\u7ed9\u5b9a\u65e5\u671f\u6216\u83b7\u5f97\u7684\u4e24\u4e2a\u65e5\u671f\u4e4b\u95f4\u7684\u533a\u522b\u3002<\/p>\n<p>\u7ed9\u521d\u59cb\u5316\u7684\u65e5\u671f\u6dfb\u52a05\u5929:<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalDate<\/span> <span class=\"n\">initialDate<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2017-07-20\"<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">LocalDate<\/span> <span class=\"n\">finalDate<\/span>   <span class=\"o\">=<\/span> <span class=\"n\">initialDate<\/span><span class=\"o\">.<\/span><span class=\"na\">plus<\/span><span class=\"o\">(<\/span><span class=\"n\">Period<\/span><span class=\"o\">.<\/span><span class=\"na\">ofDays<\/span><span class=\"o\">(<\/span><span class=\"mi\">5<\/span><span class=\"o\">));<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u521d\u59cb\u5316\u65e5\u671f: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">initialDate<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u52a0\u65e5\u671f\u4e4b\u540e: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">finalDate<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u5468\u671fAPI\u4e2d\u63d0\u4f9b\u7ed9\u6211\u4eec\u53ef\u4ee5\u6bd4\u8f83\u4e24\u4e2a\u65e5\u671f\u7684\u5dee\u522b\uff0c\u50cf\u4e0b\u9762\u8fd9\u6837\u83b7\u53d6\u5dee\u8ddd\u5929\u6570:<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"kt\">long<\/span> <span class=\"n\">between<\/span> <span class=\"o\">=<\/span> <span class=\"n\">ChronoUnit<\/span><span class=\"o\">.<\/span><span class=\"na\">DAYS<\/span><span class=\"o\">.<\/span><span class=\"na\">between<\/span><span class=\"o\">(<\/span><span class=\"n\">initialDate<\/span><span class=\"o\">,<\/span> <span class=\"n\">finalDate<\/span><span class=\"o\">);<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u5dee\u8ddd\u5929\u6570: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">between<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p>\u4e0a\u9762\u7684\u4ee3\u7801\u4f1a\u8fd4\u56de5\uff0c\u5f53\u7136\u4f60\u60f3\u83b7\u53d6\u4e24\u4e2a\u65e5\u671f\u76f8\u5dee\u591a\u5c11\u5c0f\u65f6\u4e5f\u662f\u7b80\u5355\u7684\u3002<\/p>\n<h2>\u4e0e\u9057\u7559\u4ee3\u7801\u8f6c\u6362<\/h2>\n<p>\u5728\u4e4b\u524d\u7684\u4ee3\u7801\u4e2d\u4f60\u53ef\u80fd\u51fa\u73b0\u4e86\u5927\u91cf\u7684Date\u7c7b\uff0c\u5982\u4f55\u5c06\u5b83\u8f6c\u6362\u4e3aJava8\u79cd\u7684\u65f6\u95f4\u7c7b\u5462\uff1f<\/p>\n<p><b>Date<\/b>\u548c<b>Instant<\/b>\u4e92\u76f8\u8f6c\u6362<\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">Date<\/span> <span class=\"n\">date<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Date<\/span><span class=\"o\">.<\/span><span class=\"na\">from<\/span><span class=\"o\">(<\/span><span class=\"n\">Instant<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">());<\/span>\n<span class=\"n\">Instant<\/span> <span class=\"n\">instant<\/span> <span class=\"o\">=<\/span> <span class=\"n\">date<\/span><span class=\"o\">.<\/span><span class=\"na\">toInstant<\/span><span class=\"o\">();<\/span>\n<\/code><\/pre>\n<\/div>\n<p><b>Date<\/b>\u8f6c\u6362\u4e3a<b>LocalDateTime<\/b><\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">LocalDateTime<\/span> <span class=\"n\">localDateTime<\/span> <span class=\"o\">=<\/span> <span class=\"n\">LocalDateTime<\/span><span class=\"o\">.<\/span><span class=\"na\">from<\/span><span class=\"o\">(<\/span><span class=\"k\">new<\/span> <span class=\"n\">Date<\/span><span class=\"o\">());<\/span>\n<span class=\"n\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">localDateTime<\/span><span class=\"o\">);<\/span>\n<\/code><\/pre>\n<\/div>\n<p><b>LocalDateTime<\/b>\u8f6c<b>Date<\/b><\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">Date<\/span> <span class=\"n\">date<\/span> <span class=\"o\">=<\/span>\n    <span class=\"n\">Date<\/span><span class=\"o\">.<\/span><span class=\"na\">from<\/span><span class=\"o\">(<\/span><span class=\"n\">localDateTime<\/span><span class=\"o\">.<\/span><span class=\"na\">atZone<\/span><span class=\"o\">(<\/span><span class=\"n\">ZoneId<\/span><span class=\"o\">.<\/span><span class=\"na\">systemDefault<\/span><span class=\"o\">()).<\/span><span class=\"na\">toInstant<\/span><span class=\"o\">());<\/span>\n<\/code><\/pre>\n<\/div>\n<p><b>LocalDate<\/b>\u8f6c<b>Date<\/b><\/p>\n<div class=\"highlight\">\n<pre><code class=\"language-java\"><span class=\"n\">Date<\/span> <span class=\"n\">date<\/span> <span class=\"o\">=<\/span>\n    <span class=\"n\">Date<\/span><span class=\"o\">.<\/span><span class=\"na\">from<\/span><span class=\"o\">(<\/span><span class=\"n\">LocalDate<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">().<\/span><span class=\"na\">atStartOfDay<\/span><span class=\"o\">().<\/span><span class=\"na\">atZone<\/span><span class=\"o\">(<\/span><span class=\"n\">ZoneId<\/span><span class=\"o\">.<\/span><span class=\"na\">systemDefault<\/span><span class=\"o\">()).<\/span><span class=\"na\">toInstant<\/span><span class=\"o\">());\n\n<\/span><\/code><\/pre>\n<\/div>\n<p>&nbsp;<\/p>\n<p>\u539f\u6587:<a href=\"https:\/\/zhuanlan.zhihu.com\/p\/28133858\">\u8ddf\u4e0aJava8 &#8211; \u65e5\u671f\u548c\u65f6\u95f4\u5b9e\u7528\u6280\u5de7<\/a><\/p>\n<p>\u53c2\u8003:<a id=\"cb_post_title_url\" class=\"postTitle2\" href=\"http:\/\/www.cnblogs.com\/comeboo\/p\/5378922.html\">java8\u65b0\u7684\u65f6\u95f4\u65e5\u671f\u5e93\u53ca\u4f7f\u7528\u793a\u4f8b<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f53\u4f60\u5f00\u59cb\u4f7f\u7528Java\u64cd\u4f5c\u65e5\u671f\u548c\u65f6\u95f4\u7684\u65f6\u5019\uff0c\u4f1a\u6709\u4e00\u4e9b\u68d8\u624b\u3002\u4f60\u4e5f\u8bb8\u4f1a\u901a\u8fc7System.currentTimeMil [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[103],"tags":[],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2232"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2232"}],"version-history":[{"count":6,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2232\/revisions"}],"predecessor-version":[{"id":3515,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2232\/revisions\/3515"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}