{"id":30999,"date":"2023-04-09T05:20:31","date_gmt":"2023-02-25T17:43:36","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8java%e4%b8%ad%e5%a4%84%e7%90%86%e6%97%a5%e6%9c%9f%e6%97%b6%e9%97%b4%ef%bc%88%e5%8c%85%e6%8b%acjava7%ef%bc%89%e3%80%82\/"},"modified":"2025-08-12T21:48:15","modified_gmt":"2025-08-12T13:48:15","slug":"%e5%9c%a8java%e4%b8%ad%e5%a4%84%e7%90%86%e6%97%a5%e6%9c%9f%e6%97%b6%e9%97%b4%ef%bc%88%e5%8c%85%e6%8b%acjava7%ef%bc%89%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8java%e4%b8%ad%e5%a4%84%e7%90%86%e6%97%a5%e6%9c%9f%e6%97%b6%e9%97%b4%ef%bc%88%e5%8c%85%e6%8b%acjava7%ef%bc%89%e3%80%82\/","title":{"rendered":"\u5728Java\u4e2d\u5904\u7406\u65e5\u671f\u65f6\u95f4\uff08\u5305\u62ecJava7\uff09"},"content":{"rendered":"<p>\u5728Java8\u4e2d\uff0c\u5904\u7406\u65e5\u671f\u548c\u65f6\u95f4\u7684\u7c7b\u7fa4\u7ecf\u5386\u4e86\u7ffb\u5929\u8986\u5730\u7684\u53d8\u5316\u3002\u56e0\u6b64\uff0c\u6211\u60f3\u501f\u6b64\u673a\u4f1a\u5c06\u65e5\u671f\u548c\u65f6\u95f4\u7684\u5904\u7406\u603b\u7ed3\u4e00\u4e0b\u3002\u672c\u6b21\u6211\u4eec\u5c06\u8ba8\u8bbaJava7\u4e4b\u524d\u7684\u65e5\u671f\u548c\u65f6\u95f4\u5904\u7406\uff0c\u4e0b\u6b21\u6211\u4eec\u5c06\u8c08\u8bbaJava8\u7684\u65e5\u671f\u548c\u65f6\u95f4\u5904\u7406\u3002<\/p>\n<p>\u5728Java7\u4e4b\u524d\uff0c\u6211\u4eec\u4e3b\u8981\u4f7f\u7528Date\u7c7b\u548cCalendar\u7c7b\u3002\u53e6\u5916\uff0c\u4f7f\u7528Apache Commons Lang\u7684DateUtils\u548cDateFormatUtils\u4e5f\u662f\u5f88\u65b9\u4fbf\u7684\u9009\u9879\u3002<\/p>\n<p>\u5173\u4e8e Apache Commons Lang<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">https:\/\/commons.apache.org\/proper\/commons-lang\/<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30d0\u30fc\u30b8\u30e7\u30f33.2\u3067\u306f\u3001Java6\u4ee5\u4e0a\u304c\u5fc5\u8981\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30d0\u30fc\u30b8\u30e7\u30f33.0\u3067\u306f\u3001Java5\u4ee5\u4e0a\u304c\u5fc5\u8981\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30d0\u30fc\u30b8\u30e7\u30f32.x\u306f\u3001Java1.4\u3067\u4f7f\u7528\u53ef\u80fd\u3002<\/ul>\n<h1>\u73fe\u5728\/\u5275\u5efa\u6307\u5b9a\u65e5\u671f\u548c\u6642\u9593\u521b\u5efa\u4e00\u4e2a\u5f53\u524d\/\u6307\u5b9a\u65e5\u671f\u548c\u65f6\u95f4\u7684 Date \u7c7b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u73fe\u5728\u65e5\u6642<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">nowDate1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Date<\/span><span class=\"o\">();<\/span>\r\n<span class=\"c1\">\/\/ \u6587\u5b57\u5217\u2192Date<\/span>\r\n<span class=\"nc\">DateFormat<\/span> <span class=\"n\">dateTimeFormat<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">SimpleDateFormat<\/span><span class=\"o\">(<\/span><span class=\"s\">\"yyyy\/MM\/dd HH:mm:ss\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">date1<\/span> <span class=\"o\">=<\/span> <span class=\"n\">dateTimeFormat<\/span><span class=\"o\">.<\/span><span class=\"na\">parse<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2016\/5\/2 15:00:00\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ \u6587\u5b57\u5217\u2192Date\uff08Apache Commons Lang\uff09<\/span>\r\n<span class=\"c1\">\/\/ \u203bJava5\u304b\u3089\u3001\u66f8\u5f0f\u5f15\u6570\u3092\u53ef\u5909\u9577\u5f15\u6570\u3068\u3057\u3066\u8a18\u8ff0\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3002<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">date1b<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">parseDate<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2016\/5\/2 15:00:00\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"yyyy\/MM\/dd HH:mm:ss\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">date1c<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">parseDate<\/span><span class=\"o\">(<\/span><span class=\"s\">\"2016-5-2 15:00:00\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"yyyy\/MM\/dd HH:mm:ss\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"yyyy-MM-dd HH:mm:ss\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ Calendar\u2192Date<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">date2<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">GregorianCalendar<\/span><span class=\"o\">(<\/span><span class=\"mi\">2016<\/span><span class=\"o\">,<\/span> <span class=\"mi\">5<\/span> <span class=\"o\">-<\/span> <span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">15<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">).<\/span><span class=\"na\">getTime<\/span><span class=\"o\">();<\/span>\r\n<span class=\"c1\">\/\/ long\u2192Date<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">date3<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Date<\/span><span class=\"o\">(<\/span><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">currentTimeMillis<\/span><span class=\"o\">());<\/span>\r\n<\/code><\/pre>\n<p>\u521b\u5efa\u4e00\u4e2aCalendar\u7c7b\u7684\u5f53\u524d\/\u6307\u5b9a\u65e5\u671f\u548c\u65f6\u95f4\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u73fe\u5728\u65e5\u6642<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">nowCal1<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">getInstance<\/span><span class=\"o\">();<\/span>\r\n<span class=\"c1\">\/\/ \u6307\u5b9a\u65e5\u6642<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">cal1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">GregorianCalendar<\/span><span class=\"o\">(<\/span><span class=\"mi\">2016<\/span><span class=\"o\">,<\/span> <span class=\"mi\">5<\/span> <span class=\"o\">-<\/span> <span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"mi\">15<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">,<\/span> <span class=\"mi\">0<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ Date\u2192Calendar<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">cal2<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">getInstance<\/span><span class=\"o\">();<\/span>\r\n<span class=\"n\">cal2<\/span><span class=\"o\">.<\/span><span class=\"na\">setTime<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ Date\u2192Calendar\uff08Apache Commons Lang\uff09<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">cal2b<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">toCalendar<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ long\u2192Calendar<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">cal3<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">getInstance<\/span><span class=\"o\">();<\/span>\r\n<span class=\"n\">cal3<\/span><span class=\"o\">.<\/span><span class=\"na\">setTimeInMillis<\/span><span class=\"o\">(<\/span><span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">currentTimeMillis<\/span><span class=\"o\">());<\/span>\r\n<\/code><\/pre>\n<p>\u521b\u5efa\u4e00\u4e2a\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d\u7684\u5f53\u524d\/\u6307\u5b9a\u65e5\u671f\u548c\u65f6\u95f4\u7684long\u578b\u6570\u636e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u73fe\u5728\u65e5\u6642<\/span>\r\n<span class=\"kt\">long<\/span> <span class=\"n\">nowMsec1<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">currentTimeMillis<\/span><span class=\"o\">();<\/span>\r\n<span class=\"c1\">\/\/ \u6307\u5b9a\u65e5\u6642<\/span>\r\n<span class=\"kt\">long<\/span> <span class=\"n\">msec1<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">currentTimeMillis<\/span><span class=\"o\">()<\/span> <span class=\"o\">-<\/span> <span class=\"mi\">24<\/span> <span class=\"o\">*<\/span> <span class=\"mi\">60<\/span> <span class=\"o\">*<\/span> <span class=\"mi\">60<\/span> <span class=\"o\">*<\/span> <span class=\"mi\">1000<\/span><span class=\"o\">;<\/span>\r\n<span class=\"c1\">\/\/ Date\u2192long<\/span>\r\n<span class=\"kt\">long<\/span> <span class=\"n\">msec2<\/span> <span class=\"o\">=<\/span> <span class=\"n\">date1<\/span><span class=\"o\">.<\/span><span class=\"na\">getTime<\/span><span class=\"o\">();<\/span>\r\n<span class=\"c1\">\/\/ Calendar\u2192long<\/span>\r\n<span class=\"kt\">long<\/span> <span class=\"n\">msec3<\/span> <span class=\"o\">=<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">getTimeInMillis<\/span><span class=\"o\">();<\/span>\r\n<\/code><\/pre>\n<p>\u521b\u5efa\u4e00\u4e2a\u8868\u793a\u5f53\u524d\/\u6307\u5b9a\u65e5\u671f\u65f6\u95f4\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ Date\u2192\u6587\u5b57\u5217<\/span>\r\n<span class=\"nc\">DateFormat<\/span> <span class=\"n\">timestampFormat1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">SimpleDateFormat<\/span><span class=\"o\">(<\/span><span class=\"s\">\"yyyy\/MM\/dd HH:mm:ss.SSS\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">str1<\/span> <span class=\"o\">=<\/span> <span class=\"n\">timestampFormat1<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ Date\u2192\u6587\u5b57\u5217\uff08Apache Commons Lang\uff09<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">str1b<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateFormatUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"yyyy\/MM\/dd HH:mm:ss.SSS\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ Calendar\u2192\u6587\u5b57\u5217<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">str2<\/span> <span class=\"o\">=<\/span> <span class=\"n\">format<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">getTime<\/span><span class=\"o\">());<\/span>\r\n<span class=\"c1\">\/\/ long\u2192\u6587\u5b57\u5217<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">str3<\/span> <span class=\"o\">=<\/span> <span class=\"n\">format<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"k\">new<\/span> <span class=\"nc\">Date<\/span><span class=\"o\">(<\/span><span class=\"n\">msec1<\/span><span class=\"o\">));<\/span>\r\n<\/code><\/pre>\n<h1>\u4ece\u65e5\u671f\u548c\u65f6\u95f4\u4e2d\u63d0\u53d6\u65e5\u671f<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ Date \u65e5\u6642\u2192\u65e5\u4ed8\uff08\u6642\u523b\u30bc\u30ed\uff09<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">tmpCal1<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">getInstance<\/span><span class=\"o\">();<\/span>\r\n<span class=\"n\">tmpCal1<\/span><span class=\"o\">.<\/span><span class=\"na\">setTime<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">tmpCal2<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">GregorianCalendar<\/span><span class=\"o\">(<\/span><span class=\"n\">tmpCal1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">YEAR<\/span><span class=\"o\">),<\/span> <span class=\"n\">tmpCal1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">MONTH<\/span><span class=\"o\">),<\/span>\r\n        <span class=\"n\">tmpCal1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DATE<\/span><span class=\"o\">));<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">ymdDate1<\/span> <span class=\"o\">=<\/span> <span class=\"n\">tmpCal2<\/span><span class=\"o\">.<\/span><span class=\"na\">getTime<\/span><span class=\"o\">();<\/span>\r\n\r\n<span class=\"c1\">\/\/ Calendar \u65e5\u6642\u2192\u65e5\u4ed8\uff08\u6642\u523b\u30bc\u30ed\uff09<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">ymdCal1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">GregorianCalendar<\/span><span class=\"o\">(<\/span><span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">YEAR<\/span><span class=\"o\">),<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">MONTH<\/span><span class=\"o\">),<\/span>\r\n        <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DATE<\/span><span class=\"o\">));<\/span>\r\n\r\n<span class=\"c1\">\/\/ Date \u65e5\u6642\u2192\u65e5\u4ed8\uff08\u6642\u523b\u30bc\u30ed\uff09\uff08Apache Commons Lang\uff09<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">ymdDate2<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">truncate<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DATE<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ Calendar \u65e5\u6642\u2192\u65e5\u4ed8\uff08\u6642\u523b\u30bc\u30ed\uff09\uff08Apache Commons Lang\uff09<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">ymdCal2<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">truncate<\/span><span class=\"o\">(<\/span><span class=\"n\">cal1<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DATE<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u4e0a\u8a18\u4ee5\u5916\u306b\u3001\u66f8\u5f0f\"yyyy\/MM\/dd\"\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u6587\u5b57\u5217\u3068\u3057\u3066\u53d6\u5f97\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3002<\/span>\r\n<\/code><\/pre>\n<h1>\u63d0\u53d6\u65f6\u95f4\u6233<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u6642\u523b\u306e\u307f\u3092\u53d6\u308a\u51fa\u3059\u3053\u3068\u306f\u51fa\u6765\u306a\u3044\u6a21\u69d8\u3002<\/span>\r\n<span class=\"c1\">\/\/ \u5fc5\u8981\u306a\u3089\u3001\u66f8\u5f0f\"HH:mm:ss\"\u306e\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3067\u6587\u5b57\u5217\u3068\u3057\u3066\u53d6\u5f97\u3059\u308b\uff08\uff1f\uff09<\/span>\r\n<\/code><\/pre>\n<h1>\u83b7\u53d6\u661f\u671f\u51e0<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ Date\u304b\u3089\u66dc\u65e5\u53d6\u5f97<\/span>\r\n<span class=\"c1\">\/\/ \u203b\u30ed\u30b1\u30fc\u30eb\u306b\u3088\u3063\u3066\u66dc\u65e5\u306e\u8868\u8a18\u304c\u5909\u308f\u308b\u3002<\/span>\r\n<span class=\"nc\">DateFormat<\/span> <span class=\"n\">weekFormat1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">SimpleDateFormat<\/span><span class=\"o\">(<\/span><span class=\"s\">\"E\"<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Locale<\/span><span class=\"o\">.<\/span><span class=\"na\">JAPANESE<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">DateFormat<\/span> <span class=\"n\">weekFormat2<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">SimpleDateFormat<\/span><span class=\"o\">(<\/span><span class=\"s\">\"EEEE\"<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Locale<\/span><span class=\"o\">.<\/span><span class=\"na\">JAPANESE<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">weekStr1<\/span> <span class=\"o\">=<\/span> <span class=\"n\">weekFormat1<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">weekStr2<\/span> <span class=\"o\">=<\/span> <span class=\"n\">weekFormat2<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"c1\">\/\/ Calendar\u304b\u3089\u66dc\u65e5\u53d6\u5f97<\/span>\r\n<span class=\"kt\">int<\/span> <span class=\"n\">weekInt1<\/span> <span class=\"o\">=<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DAY_OF_WEEK<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">weekNames<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"o\">{<\/span> <span class=\"s\">\"\u65e5\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u6708\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u706b\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u6c34\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u6728\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u91d1\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u571f\"<\/span> <span class=\"o\">};<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">weekStr3<\/span> <span class=\"o\">=<\/span> <span class=\"n\">weekNames<\/span><span class=\"o\">[<\/span><span class=\"n\">weekInt1<\/span> <span class=\"o\">-<\/span> <span class=\"mi\">1<\/span><span class=\"o\">];<\/span>\r\n\r\n<span class=\"c1\">\/\/ Java6\u3067\u306f\u3001Calendar.getDisplayName\u30e1\u30bd\u30c3\u30c9\u304c\u4f7f\u3048\u308b\u3002<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">weekStr4<\/span> <span class=\"o\">=<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">getDisplayName<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DAY_OF_WEEK<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">SHORT<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Locale<\/span><span class=\"o\">.<\/span><span class=\"na\">JAPANESE<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">weekStr5<\/span> <span class=\"o\">=<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">getDisplayName<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DAY_OF_WEEK<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">LONG<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Locale<\/span><span class=\"o\">.<\/span><span class=\"na\">JAPANESE<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"c1\">\/\/ Date\u304b\u3089\u66dc\u65e5\u53d6\u5f97\uff08Apache Commons Lang\uff09<\/span>\r\n<span class=\"c1\">\/\/ \u203b\u30ed\u30b1\u30fc\u30eb\u306b\u3088\u3063\u3066\u66dc\u65e5\u306e\u8868\u8a18\u304c\u5909\u308f\u308b\u3002<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">weekStr6<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateFormatUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"E\"<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Locale<\/span><span class=\"o\">.<\/span><span class=\"na\">JAPANESE<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">weekStr7<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateFormatUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"EEEE\"<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Locale<\/span><span class=\"o\">.<\/span><span class=\"na\">JAPANESE<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ Calendar\u304b\u3089\u66dc\u65e5\u53d6\u5f97\uff08Apache Commons Lang\uff09<\/span>\r\n<span class=\"c1\">\/\/ \u203b\u30ed\u30b1\u30fc\u30eb\u306b\u3088\u3063\u3066\u66dc\u65e5\u306e\u8868\u8a18\u304c\u5909\u308f\u308b\u3002<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">weekStr8<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateFormatUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"n\">cal1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"E\"<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Locale<\/span><span class=\"o\">.<\/span><span class=\"na\">JAPANESE<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">String<\/span> <span class=\"n\">weekStr9<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateFormatUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"n\">cal1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"EEEE\"<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Locale<\/span><span class=\"o\">.<\/span><span class=\"na\">JAPANESE<\/span><span class=\"o\">);<\/span>\r\n<\/code><\/pre>\n<h1>\u65e5\u671f\u548c\u6642\u9593\u7684\u8a08\u7b97<br \/>\n\u52a0\u7b97\uff1a\u8fdb\u884c\u52a0\u6cd5\u8fd0\u7b97<br \/>\n\u6e1b\u7b97\uff1a\u8fdb\u884c\u51cf\u6cd5\u8fd0\u7b97<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ Date 1\u79d2\u5f8c\u30011\u65e5\u5f8c<\/span>\r\n<span class=\"c1\">\/\/ \u203bJava5\u3067\u306f\u3001TimeUnit\u304c\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3002<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">nextSecDate<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Date<\/span><span class=\"o\">(<\/span><span class=\"n\">msec1<\/span> <span class=\"o\">+<\/span> <span class=\"nc\">TimeUnit<\/span><span class=\"o\">.<\/span><span class=\"na\">SECONDS<\/span><span class=\"o\">.<\/span><span class=\"na\">toMillis<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">));<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">nextDayDate<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Date<\/span><span class=\"o\">(<\/span><span class=\"n\">msec1<\/span> <span class=\"o\">+<\/span> <span class=\"nc\">TimeUnit<\/span><span class=\"o\">.<\/span><span class=\"na\">DAYS<\/span><span class=\"o\">.<\/span><span class=\"na\">toMillis<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">));<\/span>\r\n\r\n<span class=\"c1\">\/\/ Calendar 1\u79d2\u5f8c\u30011\u65e5\u5f8c\u3001\uff11\u30f6\u6708\u5f8c<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">nextSecCal<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">)<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">clone<\/span><span class=\"o\">();<\/span>\r\n<span class=\"n\">nextSecCal<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">SECOND<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">nextDayCal<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">)<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">clone<\/span><span class=\"o\">();<\/span>\r\n<span class=\"n\">nextDayCal<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DATE<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">nextMonthCal<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">)<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">clone<\/span><span class=\"o\">();<\/span>\r\n<span class=\"n\">nextMonthCal<\/span><span class=\"o\">.<\/span><span class=\"na\">add<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">MONTH<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"c1\">\/\/ Date 1\u79d2\u5f8c\u30011\u65e5\u5f8c\uff08Apache Commons Lang\uff09<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">nextSecDate2<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">addSeconds<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">nextDayDate2<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">addDays<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Date<\/span> <span class=\"n\">nextMonthDate2<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">addMonths<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n<\/code><\/pre>\n<p>\u5bfb\u627e\u6708\u521d\/\u6708\u672b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ Calendar \u6708\u521d\u3001\u6708\u672b<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">monthBeginning<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">)<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">clone<\/span><span class=\"o\">();<\/span>\r\n<span class=\"n\">monthBeginning<\/span><span class=\"o\">.<\/span><span class=\"na\">set<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DATE<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"nc\">Calendar<\/span> <span class=\"n\">monthEnd<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">)<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">clone<\/span><span class=\"o\">();<\/span>\r\n<span class=\"n\">monthEnd<\/span><span class=\"o\">.<\/span><span class=\"na\">set<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DATE<\/span><span class=\"o\">,<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">getActualMaximum<\/span><span class=\"o\">(<\/span><span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DATE<\/span><span class=\"o\">));<\/span>\r\n<\/code><\/pre>\n<p>\u5bfb\u627e\u5dee\u8ddd\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ Date \u65e5\u6642\u306e\u5dee \u30df\u30ea\u79d2\u5358\u4f4d\u3001\u65e5\u6570\u5358\u4f4d\uff08\u5207\u308a\u6368\u3066\uff09<\/span>\r\n<span class=\"c1\">\/\/ \u203b\u65e5\u4ed8\u306e\u5dee\u304c\u307b\u3057\u3044\u3068\u304d\u306f\u3001\u65e5\u6642\u2192\u65e5\u4ed8\u306e\u307f\u306b\u5909\u63db\u3057\u3066\u3001\u4e0a\u8a18\u3092\u8a08\u7b97\u3059\u308b\u3002<\/span>\r\n<span class=\"kt\">long<\/span> <span class=\"n\">dateDiffMsec<\/span> <span class=\"o\">=<\/span> <span class=\"n\">nextDayDate<\/span><span class=\"o\">.<\/span><span class=\"na\">getTime<\/span><span class=\"o\">()<\/span> <span class=\"o\">-<\/span> <span class=\"n\">date1<\/span><span class=\"o\">.<\/span><span class=\"na\">getTime<\/span><span class=\"o\">();<\/span>\r\n<span class=\"kt\">long<\/span> <span class=\"n\">dateDiffDays<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"n\">nextDayDate<\/span><span class=\"o\">.<\/span><span class=\"na\">getTime<\/span><span class=\"o\">()<\/span> <span class=\"o\">-<\/span> <span class=\"n\">date1<\/span><span class=\"o\">.<\/span><span class=\"na\">getTime<\/span><span class=\"o\">())<\/span> <span class=\"o\">\/<\/span> <span class=\"nc\">TimeUnit<\/span><span class=\"o\">.<\/span><span class=\"na\">DAYS<\/span><span class=\"o\">.<\/span><span class=\"na\">toMillis<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ Calendar \u65e5\u6642\u306e\u5dee \u30df\u30ea\u79d2\u5358\u4f4d\u3001\u65e5\u6570\u5358\u4f4d\uff08\u5207\u308a\u6368\u3066\uff09<\/span>\r\n<span class=\"c1\">\/\/ \u203b\u65e5\u4ed8\u306e\u5dee\u304c\u307b\u3057\u3044\u3068\u304d\u306f\u3001\u65e5\u6642\u2192\u65e5\u4ed8\u306e\u307f\u306b\u5909\u63db\u3057\u3066\u3001\u4e0a\u8a18\u3092\u8a08\u7b97\u3059\u308b\u3002<\/span>\r\n<span class=\"kt\">long<\/span> <span class=\"n\">calDiffMsec<\/span> <span class=\"o\">=<\/span> <span class=\"n\">nextDayCal<\/span><span class=\"o\">.<\/span><span class=\"na\">getTimeInMillis<\/span><span class=\"o\">()<\/span> <span class=\"o\">-<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">getTimeInMillis<\/span><span class=\"o\">();<\/span>\r\n<span class=\"kt\">long<\/span> <span class=\"n\">calDiffDays<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"n\">nextDayCal<\/span><span class=\"o\">.<\/span><span class=\"na\">getTimeInMillis<\/span><span class=\"o\">()<\/span> <span class=\"o\">-<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">getTimeInMillis<\/span><span class=\"o\">())<\/span> <span class=\"o\">\/<\/span> <span class=\"nc\">TimeUnit<\/span><span class=\"o\">.<\/span><span class=\"na\">DAYS<\/span><span class=\"o\">.<\/span><span class=\"na\">toMillis<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"c1\">\/\/ Date \u65e5\u4ed8\u306e\u5dee\uff08Apache Commons Lang\uff09<\/span>\r\n<span class=\"kt\">long<\/span> <span class=\"n\">dateDiffDays2<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">truncate<\/span><span class=\"o\">(<\/span><span class=\"n\">nextDayDate<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DATE<\/span><span class=\"o\">).<\/span><span class=\"na\">getTime<\/span><span class=\"o\">()<\/span>\r\n    <span class=\"o\">-<\/span> <span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">truncate<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DATE<\/span><span class=\"o\">).<\/span><span class=\"na\">getTime<\/span><span class=\"o\">())<\/span> <span class=\"o\">\/<\/span> <span class=\"nc\">TimeUnit<\/span><span class=\"o\">.<\/span><span class=\"na\">DAYS<\/span><span class=\"o\">.<\/span><span class=\"na\">toMillis<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ Calendar \u65e5\u4ed8\u306e\u5dee\uff08Apache Commons Lang\uff09<\/span>\r\n<span class=\"kt\">long<\/span> <span class=\"n\">calDiffDays2<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">truncate<\/span><span class=\"o\">(<\/span><span class=\"n\">nextDayCal<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DATE<\/span><span class=\"o\">).<\/span><span class=\"na\">getTimeInMillis<\/span><span class=\"o\">()<\/span>\r\n    <span class=\"o\">-<\/span> <span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">truncate<\/span><span class=\"o\">(<\/span><span class=\"n\">cal1<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Calendar<\/span><span class=\"o\">.<\/span><span class=\"na\">DATE<\/span><span class=\"o\">).<\/span><span class=\"na\">getTimeInMillis<\/span><span class=\"o\">())<\/span> <span class=\"o\">\/<\/span> <span class=\"nc\">TimeUnit<\/span><span class=\"o\">.<\/span><span class=\"na\">DAYS<\/span><span class=\"o\">.<\/span><span class=\"na\">toMillis<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n<\/code><\/pre>\n<p>\u8fdb\u884c\u6bd4\u8f83\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ Date\u306e\u524d\u5f8c\u6bd4\u8f03<\/span>\r\n<span class=\"kt\">boolean<\/span> <span class=\"n\">dateBeforeFlag<\/span> <span class=\"o\">=<\/span> <span class=\"n\">date1<\/span><span class=\"o\">.<\/span><span class=\"na\">before<\/span><span class=\"o\">(<\/span><span class=\"n\">nextDayDate<\/span><span class=\"o\">);<\/span>\r\n<span class=\"kt\">boolean<\/span> <span class=\"n\">dateAfterFlag<\/span> <span class=\"o\">=<\/span> <span class=\"n\">nextDayDate<\/span><span class=\"o\">.<\/span><span class=\"na\">after<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ Calendar\u306e\u524d\u5f8c\u6bd4\u8f03<\/span>\r\n<span class=\"kt\">boolean<\/span> <span class=\"n\">calBeforeFlag<\/span> <span class=\"o\">=<\/span> <span class=\"n\">cal1<\/span><span class=\"o\">.<\/span><span class=\"na\">before<\/span><span class=\"o\">(<\/span><span class=\"n\">nextDayCal<\/span><span class=\"o\">);<\/span>\r\n<span class=\"kt\">boolean<\/span> <span class=\"n\">calAfterFlag<\/span> <span class=\"o\">=<\/span> <span class=\"n\">nextDayCal<\/span><span class=\"o\">.<\/span><span class=\"na\">after<\/span><span class=\"o\">(<\/span><span class=\"n\">cal1<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"c1\">\/\/ Date \u65e5\u4ed8\u4e00\u81f4\u78ba\u8a8d\uff08Apache Commons Lang\uff09<\/span>\r\n<span class=\"c1\">\/\/ \u203b\u6642\u523b\u306f\u7121\u8996\u3057\u3066\u3001\u65e5\u4ed8\u306e\u307f\u6bd4\u8f03\u3055\u308c\u308b\u3002<\/span>\r\n<span class=\"kt\">boolean<\/span> <span class=\"n\">dateSameFlag<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">isSameDay<\/span><span class=\"o\">(<\/span><span class=\"n\">date1<\/span><span class=\"o\">,<\/span> <span class=\"n\">nextSecDate<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/ Calendar \u65e5\u4ed8\u4e00\u81f4\u78ba\u8a8d\uff08Apache Commons Lang\uff09<\/span>\r\n<span class=\"c1\">\/\/ \u203b\u6642\u523b\u306f\u7121\u8996\u3057\u3066\u3001\u65e5\u4ed8\u306e\u307f\u6bd4\u8f03\u3055\u308c\u308b\u3002<\/span>\r\n<span class=\"kt\">boolean<\/span> <span class=\"n\">calSameFlag<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">DateUtils<\/span><span class=\"o\">.<\/span><span class=\"na\">isSameDay<\/span><span class=\"o\">(<\/span><span class=\"n\">cal1<\/span><span class=\"o\">,<\/span> <span class=\"n\">nextSecCal<\/span><span class=\"o\">);<\/span>\r\n<\/code><\/pre>\n<h1>\u989d\u5916\uff1a\u7761\u7720<br \/>\n\u4f7f\u7528Java5\u7684TimeUnit\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u7528\u81ea\u5df1\u559c\u6b22\u7684\u65f6\u95f4\u5355\u4f4d\u6765\u7f16\u5199\u7761\u7720\u65f6\u95f4\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nc\">TimeUnit<\/span><span class=\"o\">.<\/span><span class=\"na\">SECONDS<\/span><span class=\"o\">.<\/span><span class=\"na\">sleep<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n<\/code><\/pre>\n<h1>\u8bf7\u53c2\u8003<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Java\u65e5\u4ed8\u51e6\u7406\u30e1\u30e2(Hishidama&#8217;s Java Date Memo) http:\/\/www.ne.jp\/asahi\/hishidama\/home\/tech\/java\/date.html<\/ul>\n<\/li>\n<\/ul>\n<p>\u65e5\u6642\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b(get) &#8211; Calendar\u30af\u30e9\u30b9 http:\/\/www.javadrive.jp\/start\/calendar\/index2.html<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Java8\u4e2d\uff0c\u5904\u7406\u65e5\u671f\u548c\u65f6\u95f4\u7684\u7c7b\u7fa4\u7ecf\u5386\u4e86\u7ffb\u5929\u8986\u5730\u7684\u53d8\u5316\u3002\u56e0\u6b64\uff0c\u6211\u60f3\u501f\u6b64\u673a\u4f1a\u5c06\u65e5\u671f\u548c\u65f6\u95f4\u7684\u5904\u7406\u603b\u7ed3\u4e00\u4e0b\u3002\u672c\u6b21\u6211 [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30999","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site 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content=\"\u5173\u4e8e\u5728Java\u4e2d\u5904\u7406\u65e5\u671f\u65f6\u95f4\uff08\u5305\u62ecJava7\uff09\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5728java\u4e2d\u5904\u7406\u65e5\u671f\u65f6\u95f4\uff08\u5305\u62ecjava7\uff09\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-02-25T17:43:36+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T13:48:15+00:00\" \/>\n<meta name=\"author\" content=\"\u6587, \u7fd4\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6587, \u7fd4\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" 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