?? 在Java中關(guān)于時(shí)間的處理有很多種方法，在API中也有好幾個(gè)關(guān)于時(shí)間處理的類，如 Date、Canlendar、GregorianCalendar、SimpleDateFormat、timestamp等...貌似很雜,現(xiàn)在一一整理~
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?? 各種時(shí)間類的關(guān)系如下：
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一、是獲取時(shí)間：
????? System.currentTimeMillis()??? //1970年到現(xiàn)在的毫米數(shù)
????? Date date = new Date()?????????????????
????? Canlendar c = new Calendar.getInstance()
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二、格式化時(shí)間：????? Date d = new Date();
????? SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm：ss");
????? System.out.println(sdf.format(d));
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三、獲取月份等值????? Canlendar c = new Calendar.getInstance()
??? ? System.out.println(c.get(Calendar.MONTH)+1)
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四、在數(shù)據(jù)庫中獲取時(shí)間點(diǎn)????? Timestamp ts = new rs.getTimestamp("date");
????? SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm：ss");
????? System.out.println(sdf.format(ts));
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五、將設(shè)定的時(shí)間字符串轉(zhuǎn)換為時(shí)間????? String s = "1970-12-30 08:21:14.0"；
????? Timestamp ts = Timestamp.valueOf(s);
????? System.out.println(ts);
????? String s1 = "08:21:14";
??? ? Time t = Time.valueOf(s1);
??? ? System.out.println(t);
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六、時(shí)區(qū)時(shí)間的獲取????? Cadendar cJanpan = new GregorianCadendar(TimeZone.getTimeZone("Japan"));
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System.out.println(cJapan.get(Calendar.HOUR_OF_DAY);
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