{"id":31746,"date":"2022-12-15T15:50:55","date_gmt":"2023-07-27T02:20:52","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8ejava%e7%ad%89%e8%af%ad%e8%a8%80%e4%b8%ad%e7%9a%84%e6%97%a5%e6%9c%9f%e5%a4%84%e7%90%86\/"},"modified":"2024-04-29T05:25:16","modified_gmt":"2024-04-28T21:25:16","slug":"%e5%85%b3%e4%ba%8ejava%e7%ad%89%e8%af%ad%e8%a8%80%e4%b8%ad%e7%9a%84%e6%97%a5%e6%9c%9f%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8ejava%e7%ad%89%e8%af%ad%e8%a8%80%e4%b8%ad%e7%9a%84%e6%97%a5%e6%9c%9f%e5%a4%84%e7%90%86\/","title":{"rendered":"\u5173\u4e8eJava\u7b49\u8bed\u8a00\u4e2d\u7684\u65e5\u671f\u5904\u7406"},"content":{"rendered":"

2017\u5e749\u670821\u65e5\uff0cJava 9\u6b63\u5f0f\u53d1\u5e03?<\/p>\n

\n

\u4f46\u662f\u4eca\u5929\u6211\u8981\u8c08\u8bba\u7684\u662fJava8\u4e2d\u5f15\u5165\u7684\u65e5\u671f\u548c\u65f6\u95f4API\u3002<\/p>\n

\n

\u5386\u53f2<\/h1>\n

Java\u81ea\u4ece1.0\u7248\u672c\u5c31\u5b58\u5728java.util.Date\u7c7b\u3002
\nJava 1.0\u53d1\u5e03\u4e8e1996\u5e74\u3002
\nDate\u7c7b\u4fdd\u5b58\u7684\u662f\u81ea\u7eaa\u5143(epoch)\u4ee5\u6765\u7684\u6beb\u79d2\u6570\uff0c\u4e0d\u5305\u542b\u65f6\u533a\u4fe1\u606f\u3002
\n\u7531\u4e8eDate\u7c7b\u662f\u53ef\u53d8\u7684\uff0c\u6240\u4ee5\u7ecf\u5e38\u4f1a\u53d1\u751f\u610f\u5916\u3002
\n\u5982\u679c\u5c06Date\u4f5c\u4e3a\u51fd\u6570\u53c2\u6570\u4f20\u9012\uff0c\u56e0\u4e3a\u5b58\u5728\u53ef\u80fd\u5728\u51fd\u6570\u5185\u90e8\u88ab\u4fee\u6539\u7684\u98ce\u9669\uff0c
\n\u6709\u65f6\u9700\u8981\u8fdb\u884c\u9632\u5fa1\u6027\u590d\u5236(defensive copy)\u540e\u518d\u4f20\u9012\u3002<\/p>\n

\n

\u65e5\u671f<\/h2>\n
import<\/span> java.text.SimpleDateFormat<\/span>;<\/span>\r\nimport<\/span> java.util.Date<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> Aaa<\/span> {<\/span>\r\n   public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> throws<\/span> Exception<\/span> {<\/span>\r\n       Date<\/span> today<\/span> =<\/span> new<\/span> Date<\/span>();<\/span>\r\n       System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Today is: \"<\/span> +<\/span> new<\/span> SimpleDateFormat<\/span>(<\/span>\"yyyy-MM-dd\"<\/span>).<\/span>format<\/span>(<\/span>today<\/span>));<\/span>\r\n\r\n       \/\/ \u6628\u65e5\u306e\u65e5\u4ed8\u3092\u8868\u793a\u3057\u305f\u3044\u306a<\/span>\r\n       \u6628\u65e5\u306e\u65e5\u4ed8\u3092\u8868\u793a<\/span>(<\/span>today<\/span>);<\/span>\r\n\r\n       \/\/ \u4eca\u65e5\u306e\u65e5\u4ed8\u3092\u8868\u793a\u3057\u305f\u3044\u306a<\/span>\r\n       System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Today is: \"<\/span> +<\/span> new<\/span> SimpleDateFormat<\/span>(<\/span>\"yyyy-MM-dd\"<\/span>).<\/span>format<\/span>(<\/span>today<\/span>));<\/span>\r\n   }<\/span>\r\n\r\n   public<\/span> static<\/span> void<\/span> \u6628\u65e5\u306e\u65e5\u4ed8\u3092\u8868\u793a<\/span>(<\/span>Date<\/span> date<\/span>)<\/span> {<\/span>\r\n       \/\/ \u6628\u65e5\u306e\u65e5\u4ed8\u3092\u4f5c\u308b<\/span>\r\n       date<\/span>.<\/span>setTime<\/span>(<\/span>date<\/span>.<\/span>getTime<\/span>()<\/span> -<\/span> 24L<\/span> *<\/span> 60<\/span> *<\/span> 60<\/span> *<\/span> 1000<\/span>);<\/span>\r\n       System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Yesterday is: \"<\/span> +<\/span> new<\/span> SimpleDateFormat<\/span>(<\/span>\"yyyy-MM-dd\"<\/span>).<\/span>format<\/span>(<\/span>date<\/span>));<\/span>\r\n   }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\n
\u7ed3\u679c (ji\u00e9 gu\u01d2) – the result<\/h2>\n
Today is: 2017-12-19\r\nYesterday is: 2017-12-18\r\nToday is: 2017-12-18\r\n<\/code><\/pre>\n
\n
\u65e5\u5386\u65f6\u4ee3<\/h2>\n
Java 1.1 \u57281997\u5e74\u5f15\u5165\u4e86 java.util.Calendar\u3002
\nJava 1.1 \u662f\u57281997\u5e74\u53d1\u5e03\u7684\u3002
\n\u5b9e\u8d28\u4e0a\uff0cCalendar \u7b49\u4e8e GregorianCalendar\u3002
\n\u5b83\u662f\u4f5c\u4e3a JDK 1.1 \u56fd\u9645\u5316\u652f\u6301\u7684\u4e00\u90e8\u5206\u5f15\u5165\u7684\u3002
\nCalendar \u4fdd\u5b58\u4e86\u4ece\u7eaa\u5143\u5f00\u59cb\u7684\u6beb\u79d2\u6570\uff08Date\uff09\u548c\u65f6\u533a\u76f8\u5173\u4fe1\u606f\u3002
\n\u4f46\u5b83\u7684API\u8bbe\u8ba1\u5f88\u7cdf\u7cd5\u3002
\n\u540c\u6837\u50cf java.util.Date \u4e00\u6837\uff0c\u5b83\u662f\u53ef\u53d8\u7684\uff0c\u6240\u4ee5\u5bb9\u6613\u51fa\u73b0\u610f\u5916\u3002<\/p>\n
\n
\u6211\u60f3\u8981\u5236\u4f5c\u65e5\u672c\u65f6\u95f42001\u5e7412\u670825\u65e514:00\u51c6\u786e\u7684\u65e5\u5386\uff0c\u4f46\u662f…<\/h2>\n
import<\/span> java.text.SimpleDateFormat<\/span>;<\/span>\r\nimport<\/span> java.util.Calendar<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> Bbb<\/span> {<\/span>\r\n   public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> throws<\/span> Exception<\/span> {<\/span>\r\n       Calendar<\/span> cal<\/span> =<\/span> Calendar<\/span>.<\/span>getInstance<\/span>();<\/span>\r\n       cal<\/span>.<\/span>set<\/span>(<\/span>Calendar<\/span>.<\/span>YEAR<\/span>,<\/span> 2001<\/span>);<\/span>\r\n       cal<\/span>.<\/span>set<\/span>(<\/span>Calendar<\/span>.<\/span>MONTH<\/span>,<\/span> 11<\/span>);<\/span> \/\/ 0 \u306f\u3058\u307e\u308a<\/span>\r\n       cal<\/span>.<\/span>set<\/span>(<\/span>Calendar<\/span>.<\/span>DAY_OF_MONTH<\/span>,<\/span> 25<\/span>);<\/span>\r\n       cal<\/span>.<\/span>set<\/span>(<\/span>Calendar<\/span>.<\/span>HOUR_OF_DAY<\/span>,<\/span> 14<\/span>);<\/span> \/\/ Calendar.HOUR \u3092\u4f7f\u3046\u3068AM\/PM\u304c\u304a\u304b\u3057\u304f\u306a\u308b<\/span>\r\n       cal<\/span>.<\/span>set<\/span>(<\/span>Calendar<\/span>.<\/span>MINUTE<\/span>,<\/span> 0<\/span>);<\/span>\r\n       cal<\/span>.<\/span>set<\/span>(<\/span>Calendar<\/span>.<\/span>SECOND<\/span>,<\/span> 0<\/span>);<\/span>\r\n       cal<\/span>.<\/span>set<\/span>(<\/span>Calendar<\/span>.<\/span>MILLISECOND<\/span>,<\/span> 0<\/span>);<\/span>\r\n\r\n       System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>new<\/span> SimpleDateFormat<\/span>(<\/span>\"yyyy-MM-dd HH:mm:ss.SSSZ\"<\/span>).<\/span>format<\/span>(<\/span>cal<\/span>.<\/span>getTime<\/span>()));<\/span>\r\n   }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\n
\u6f2b\u957f\u7684\u51ac\u5929\u65f6\u4ee3<\/h1>\n
\u65e5\u672c\u7684\u5316\u5986\uff08\u96c5\u52a0\u8fbe\uff09Commons-Lang\u7684DateUtils\u6bcf\u5929\u7684\u52aa\u529b…
\n\u4e5f\u6709Joda-Time\u8fd9\u4e2a\u9009\u62e9
\n\u57282003\u5e74\u5de6\u53f3\u51fa\u73b0\u7684.Net Framework1.1\u7684DateTime\u5df2\u7ecf\u7262\u56fa\u5730\u6210\u4e3a\u4e86Immutable\u3002<\/p>\n
\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0cJava 6.0\uff082006\u5e74\uff09\u65b0\u589e\u4e86\u5904\u7406\u548c\u5386\u7684JapaneseImperialCalendar\u3002<\/p>\n
\n
\u5168\u65b0\u7684\u9ece\u660e<\/h1>\n
Java 8.0 (2014\u5e74) \u52a0\u5165\u4e86\u65e5\u671f\u548c\u65f6\u95f4API\u3002
\n\u57fa\u4e8eJoda-Time\uff08\u6700\u65e9\u53ef\u80fd\u662f\u57282002\u5e74\u5de6\u53f3\uff09\u5236\u5b9a\u4e86JSR-310\u3002
\n\u4ee5\u4e0d\u53d8\u6027\u4e3a\u7279\u70b9
\n\u63d0\u4f9b\u5728java.time\u5305\u4e2d\u3002<\/p>\n
\n
\u65e5\u671f\u548c\u65f6\u95f4 API<\/h1>\n
\u4e3b\u8981\/\u6838\u5fc3\u7684\u73ed\u7ea7<\/p>\n
\u672c\u5730\u65e5\u671f<\/h2>\n
\u4e00\u4e2a\u4fdd\u6301\u5e74\u6708\u65e5\u7684\u7c7b\u3002\u57fa\u4e8eISO8601\u6807\u51c6\u3002\u4f7f\u7528\u5148\u8fdb\u7684\u516c\u5386\u6765\u5904\u7406\u65e5\u671f\u3002java.util.Date\u5728\u5904\u7406\u4e0a\u6709\u6731\u5229\u5386\u548c\u516c\u5386\u5207\u6362\u7684\u95ee\u9898\u3002<\/p>\n
\u672c\u5730\u65f6\u95f4<\/h2>\n
\u4e00\u4e2a\u7528\u4e8e\u4fdd\u5b58\u5c0f\u65f6\uff0c\u5206\u949f\uff0c\u79d2\uff08\u7cbe\u786e\u5230\u7eb3\u79d2\uff09\u7684\u7c7b\u3002\u4e0d\u5177\u5907\u65f6\u533a\u4fe1\u606f\u3002<\/p>\n
\u672c\u5730\u65e5\u671f\u65f6\u95f4<\/h2>\n
LocalDate\u548cLocalTime\u7c7b\u3002<\/p>\n
\u533a\u57df\u7f16\u53f7<\/h2>\n
\u4fdd\u6301\u7740\u4e9a\u6d32\/\u4e1c\u4eac\u7b49\u5730\u7406\u65f6\u533a\u4fe1\u606f\uff0c\u4e4b\u524d\u5df2\u7ecf\u6709java.util.TimeZone\uff0c\u4f46\u65b0\u521b\u5efa\u4e86\u4e00\u4e2a\u7c7b\u3002\u4e0d\u4ec5\u53ef\u4ee5\u5904\u7406\u504f\u79fb\u4fe1\u606f\uff0c\u8fd8\u80fd\u4fdd\u7559\u590f\u4ee4\u65f6\u4fe1\u606f\u3002\u4e3a\u4e86\u5904\u7406\u5355\u7eaf\u7684\u504f\u79fb\uff0c\u5b58\u5728\u4e00\u4e2a\u540d\u4e3aZoneOffset\u7684\u5b50\u7c7b\u3002<\/p>\n
\u7acb\u5373<\/h2>\n
\u542b\u4e49\uff1a\u77ac\u95f4\u3001\u77ac\u65f6\u3001\uff08\u7279\u5b9a\u7684\uff09\u65f6\u523b<\/p>\n
ZonedDateTime: \u65f6\u533a\u65e5\u671f\u65f6\u95f4<\/h2>\n
\u672c\u5730\u65e5\u671f + \u672c\u5730\u65f6\u95f4 + \u65f6\u533a<\/p>\n
\n
\u5148\u521b\u7acb\u7684\u516c\u5386\u662f\u6307…<\/h1>\n
\u300cISO8601 \u662f\u5bf91582\u5e7410\u6708\u5f00\u59cb\u5b9e\u65bd\u7684\u683c\u91cc\u9ad8\u5229\u5386\u5236\u5b9a\u7684\u4e00\u79cd\u9002\u7528\u4e8e1582\u5e74\u4ee5\u524d\u7684\u5386\u6cd5\u3002\u300d<\/p>\n
\u57281582\u5e74\u4e4b\u524d\uff0c\u5904\u7406\u7cfb\u7edf\u7684\u5904\u7406\u65b9\u5f0f\u5404\u5f02\u3002<\/h2>\n
ISO8601\u4e0d\u63d0\u4f9b\u5bf9\u516c\u5143\u524d1\u5e74\u7684\u5904\u7406\u89c4\u5b9a\u3002
\nJava\u7684LocalDate\u5c06\u516c\u51431\u5e74\u7684\u524d\u4e00\u5e74\u89c6\u4e3a0\u5e74\u6765\u5904\u7406\u3002
\nLocalDate.of(1,1,1).minusDays(1) -> 0000-12-31
\nPostgres\u5c061\u5e74\u7684\u524d\u4e00\u5e74\u89c6\u4e3a-1\u5e74\u3002<\/p>\n
\n
\u5728\u6570\u636e\u5e93\u4e2d\u5904\u7406\u65e5\u671f<\/h1>\n
\u5c31\u7b97\u662fDATE\u7c7b\u578b\uff0c\u6839\u636e\u4e0d\u540c\u7684DBMS\u5904\u7406\u65b9\u5f0f\u5404\u4e0d\u76f8\u540c\u3002<\/p>\n
\u5728\u6807\u51c6\u7684SQL\u4e2d\uff0c\u65e5\u671f\u65f6\u95f4\u76f8\u5173\u7684\u6570\u636e\u7c7b\u578b\u5305\u62ec\uff1a
\n* DATE\u7c7b\u578b\uff08\u65e5\u671f\uff09
\n* TIME\u7c7b\u578b\uff08\u65f6\u95f4\uff09
\n* TIMESTAMP\u7c7b\u578b\uff08\u65e5\u671f\u548c\u65f6\u95f4\u7684\u7ec4\u5408\uff09
\nTIME\u548cTIMESTAMP\u4e0d\u4fdd\u5b58\u65f6\u533a\u4fe1\u606f\u3002<\/p>\n
\n
\u5728Oracle\u4e2d…<\/h2>\n
\u65e5\u4ed8\u6642\u9593\u76f8\u5173\u7684\u6570\u636e\u7c7b\u578b\u6709\u56db\u79cd\uff1a
\n* DATE\uff1a\u4fdd\u5b58\u5e74\u6708\u65e5\u548c\u65f6\u5206\u79d2\uff0c\u4e0d\u5305\u542b\u65f6\u533a\u4fe1\u606f\u3002
\n* TIMESTAMP\uff1a\u4fdd\u5b58\u5e74\u6708\u65e5\u548c\u65f6\u5206\u79d2\uff0c\u53ef\u6307\u5b9a\u5c0f\u6570\u4f4d\u6570\uff08\u6700\u591a9\u4f4d\uff09\uff0c\u4e0d\u5305\u542b\u65f6\u533a\u4fe1\u606f\u3002
\n* TIMESTAMP WITH TIME ZONE\uff1a\u5728\u4e0a\u8ff0\u7684\u57fa\u7840\u4e0a\u6dfb\u52a0\u4e86\u65f6\u533a\u4fe1\u606f\u3002
\n* TIMESTAMP WITH LOCAL TIME ZONE\uff1a\u62e5\u6709\u65f6\u533a\u4fe1\u606f\uff0c\u4f46\u662f\u4ee5\u6570\u636e\u5e93\u7684\u65f6\u533a\u4e3a\u51c6\u3002<\/p>\n
\u53c2\u8003\u94fe\u63a5\uff1ahttp:\/\/otndnld.oracle.co.jp\/document\/products\/oracle11g\/111\/doc_dvd\/server.111\/E05765-03\/datatype.htm#18523<\/p>\n
\u65e5\u671f\u5728\u5185\u90e8\u4ee5\u5112\u7565\u65e5\u548c\u79d2\u4e3a\u5355\u4f4d\u30027\u5b57\u8282\u3002\u8303\u56f4\u4ece\u516c\u5143\u524d4712\u5e7401\u670801\u65e5\u5230\u516c\u51439999\u5e7412\u670831\u65e5\u3002
\n\u4f7f\u7528\u5112\u7565\u5386\u548c\u683c\u91cc\u9ad8\u5229\u5386\u3002
\n\u516c\u51431\u5e74\u7684\u524d\u4e00\u5e74\u662f0\u5e74\uff0c0\u5e74\u7684\u524d\u4e00\u5e74\u88ab\u79f0\u4e3a\u201c\u516c\u5143\u524d1\u5e74\u201d\u3002<\/p>\n
\n
\u5728Postgres\u4e2d……<\/h2>\n
    \n
  • \n
      DATE\u578b\uff08\u65e5\u4ed8\uff09<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          TIME\u578b\uff08\u6642\u523b\uff09<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \n
          • \n
              TIMESTAMP\u578b\uff08\u65e5\u4ed8\u3068\u6642\u523b\u3092\u8db3\u3057\u305f\u3082\u306e\uff09<\/ul>\n<\/li>\n<\/ul>\n
               <\/p>\n
                TIME\u3068TIMESTAMP\u306f\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306e\u6709\u308a\u7121\u3057\u3092\u6307\u5b9a\u3067\u304d\u308b<\/ul>\n
                \u4e0eOracle\u76f8\u540c\uff0c\u4f7f\u7528\u5112\u7565\u65e5\u5386\u516c\u5143\u524d4713\u5e741\u67081\u65e5\u81f3294276\u5e7412\u670831\u65e5\u3002
                \n\u91c7\u7528\u6700\u521d\u7684\u683c\u5229\u9ad8\u91cc\u5386\u6cd5\uff08\u5148\u884c\u5386\u6cd5\uff09\u3002
                \n\u516c\u51431\u5e74\u7684\u524d\u4e00\u5e74\u662f\u516c\u5143\u524d1\u5e74\uff0c\u516c\u5143\u524d1\u5e74\u7684\u524d\u4e00\u5e74\u662f\u516c\u5143\u524d2\u5e74\u3002
                \n0001-01-01\u7684\u524d\u4e00\u5929\u662f’0001-12-31 BC’.<\/p>\n
                \n
                MySQL\u88ab\u5e7f\u6cdb\u7528\u4e8e\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\u3002<\/h2>\n
                  \n
                • \n
                    DATE\u578b(\u65e5\u4ed8)0\u5e74\u6708\u65e5<\/ul>\n<\/li>\n<\/ul>\n
                     <\/p>\n
                      \n
                    • \n
                        TIME\u578b(\u6642\u523b) ’00:00:00′ \u30de\u30a4\u30af\u30ed\u79d2\u307e\u3067\u3002\u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n
                         <\/p>\n
                          DATETIME\u578b\uff08\u65e5\u4ed8\u3068\u6642\u523b\u3092\u8db3\u3057\u305f\u3082\u306e\uff09 \u30bf\u30a4\u30e0\u30be\u30fc\u30f3\u306a\u3044<\/ul>\n
                          \u5728\u65e5\u671f\u4e2d\uff0c\u4f7f\u7528 3 \u4e2a\u5b57\u8282\u7684\u5b58\u50a8\u7a7a\u95f4\u3002\u8303\u56f4\u4ece ‘1000-01-01’ \u5230 ‘9999-12-31’\uff0c\u91c7\u7528\u5148\u884c\u7684\u516c\u5386\u5236\u3002<\/p>\n
                          \n
                          \u5176\u4ed6<\/h1>\n
                          \n
                          Git \u4e0d\u4ec5\u4ec5\u662f\u4e00\u4e2a\u7248\u672c\u63a7\u5236\u7cfb\u7edf\u3002<\/h2>\n
                          \u4fdd\u7559\u4eceEpoch\u5f00\u59cb\u7684\u79d2\u6570\u548c\u65f6\u533a\u4fe1\u606f<\/p>\n
                          \n
                          Apache Spark \u662f\u4e00\u4e2a\u5feb\u901f\u3001\u53ef\u6269\u5c55\u4e14\u6613\u4e8e\u4f7f\u7528\u7684\u5f00\u6e90\u5927\u6570\u636e\u5904\u7406\u6846\u67b6\u3002<\/h2>\n
                          \u4ee5\u4e0b\u662f\u5bf9\u4e0a\u8ff0\u5185\u5bb9\u7684\u4e2d\u6587\u8868\u8fbe\uff1a<\/p>\n
                          \u65e5\u671f\u65f6\u95f4\u76f8\u5173\u6709\u4e24\u79cd\u7c7b\u578b\uff1a
                          \n* TimestampType\uff1a\u4fdd\u5b58\u5e74\u6708\u65e5\u548c\u65f6\u5206\u79d2\u4fe1\u606f\uff0c\u6ca1\u6709\u65f6\u533a\u4fe1\u606f\u3002
                          \n* DateType\uff1a\u4fdd\u5b58\u5e74\u6708\u65e5\u4fe1\u606f\u3002<\/p>\n
                          \u8bf7\u53c2\u8003\u94fe\u63a5\uff1ahttps:\/\/spark.apache.org\/docs\/latest\/sql-programming-guide.html#data-types<\/p>\n
                          \n
                          \u9576\u6728\u5730\u677f m\u00f9 d\u00ec<\/h2>\n
                          \u65e5\u4ed8\u6642\u9593\u76f8\u5173\u6709\u4e09\u79cd\u7c7b\u578b\uff1a
                          \n– DATE\u4ee5INT32\u5b58\u50a8\u81ea1970-01-01\u4ee5\u6765\u7684\u5929\u6570\u3002
                          \n– TIME_MILLIS\u4ee5INT32\u5b58\u50a8\u4ece0:00\u5f00\u59cb\u7684\u6beb\u79d2\u6570\u3002
                          \n– TIMESTAMP_MILLIS\u4ee5INT64\u5b58\u50a8\u81ea\u65f6\u4ee3\u5f00\u59cb\u4ee5\u6765\u7684\u6beb\u79d2\u6570\u3002\u6ca1\u6709\u65f6\u533a\u4fe1\u606f\u3002<\/p>\n
                          \n
                          \u603b\u7ed3<\/h1>\n
                          \u5728\u5904\u7406\u65e5\u671f\u548c\u65f6\u95f4\u65f6\uff0c\u5e94\u8be5\u4e86\u89e3\u6bcf\u4e2a\u5904\u7406\u7cfb\u7edf\u7684\u884c\u4e3a\u3002
                          \n\u8981\u8003\u8651\u65f6\u533a\u7684\u5b58\u5728\u4e0e\u5426\u3002
                          \n\u5373\u4f7f\u5b58\u5728\u590f\u4ee4\u65f6\uff0c\u4e5f\u80fd\u6b63\u5e38\u5de5\u4f5c\u5417\uff1f
                          \n\u6700\u597d\u8bbe\u8ba1\u4e00\u4e2a\u80fd\u591f\u5728\u66f4\u6539\u5904\u7406\u673a\u7684\u65f6\u533a\u65f6\u4e0d\u4f1a\u51fa\u95ee\u9898\u7684\u7ed3\u6784\u3002<\/p>\n
                          \n
                          \u83b7\u53d6\u5f53\u524d\u65e5\u672c\u672c\u5730\u65f6\u95f4
                          \nLocalDate.now(ZoneId.of(“Asia\/Tokyo”))
                          \nZoneId.getAvailableZoneIds.asScala.foreach(println)
                          \nJapaneseDate.of(1900,1,1).getEra<\/p>\n
                          \u5728Oracle\u4e2d\uff0c\u65e5\u671f\u65f6\u95f4\u76f8\u5173\u7684\u6570\u636e\u7c7b\u578b\u6709\u56db\u79cd\u3002<\/p>\n
                          \u6211\u4eec\u5728\u5185\u90e8\u4fdd\u6301\u7740\u5112\u7565\u65e5\u3002\u4ece-4712\/01\/01\u52309999\/12\/31\u3002\u6211\u4eec\u540c\u65f6\u4f7f\u7528\u5112\u7565\u5386\u548c\u683c\u91cc\u9ad8\u5229\u5386\u3002\u5c06\u65e5\u671f2001-01-01\u8f6c\u6362\u4e3a\u5112\u7565\u65e5\u7684\u503c\u662f2451911\u3002<\/p>\n
                          \u628a\u65e5\u671f ‘0001-01-01’ \u8f6c\u6362\u4e3a\u5112\u7565\u65e5\uff0c\u7ed3\u679c\u4e3a1721424\u3002<\/p>\n
                          \u5c06\u65e5\u671f’1582-10-04’\u8f6c\u6362\u4e3aJ\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\u8f93\u51fa\u4e3a2299160\uff0c\u5c06\u65e5\u671f’1582-10-15’\u8f6c\u6362\u4e3aJ\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\u8f93\u51fa\u4e3a2299161\u3002<\/p>\n
                          \u5728Postgres\u4e2d\uff0c\u4e0eOracle\u4e00\u6837\uff0c\u4f7f\u7528\u4e86\u5112\u7565\u65e5\u5386\uff0c\u4ece\u516c\u5143\u524d4713\u5e741\u67081\u65e5\u5230\u516c\u5143294276\u5e7412\u670831\u65e5\u3002\u5728Postgres\u4e2d\uff0c\u6267\u884cSELECT TO_CHAR(DATE ‘2001-01-01’, ‘J’)\u547d\u4ee4\u53ef\u4ee5\u5f97\u5230\u7ed3\u679c\u3002<\/p>\n
                          \u5c06 to_char \u7ffb\u8bd1\u6210\u4e2d\u6587\u3002<\/h2>\n
                          2451911\uff081\u884c\uff09\u53ef\u4ee5\u8f6c\u8ff0\u4e3a\uff1a\u4e00\u884c\u4e2d\u67092451911\u6761\u6570\u636e\u3002<\/p>\n
                          postgres=# SELECT TO_CHAR (DATE ‘0001-01-01’, ‘J’);<\/p>\n
                          \u5c06\u65e5\u671f ‘0001-01-01’ \u8f6c\u6362\u4e3a\u5b57\u7b26\u8868\u793a\uff0c\u4f7f\u7528J\u6a21\u5f0f\u3002<\/p>\n
                          \u8f6c\u6362\u6210\u5b57\u7b26<\/h2>\n
                          1721426
                          \n\uff081 \u884c\uff09<\/p>\n
                          postgres=# \u67e5\u8be2 (\u65e5\u671f ‘1582-10-04’, ‘J’) \u7684TO_CHAR\u503c;<\/p>\n
                          \u5c06to_char\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32<\/h2>\n
                          2299150\u53ef\u4ee5\u7ffb\u8bd1\u6210”\u4e8c\u767e\u4e8c\u5341\u4e5d\u4e07\u4e5d\u5343\u4e00\u767e\u4e94\u5341”\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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