最简单获取当前时间的方法:
方法一:
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import java.util.Calendar; public class DateTime{ public static void main(String[] args){ Calendar c = Calendar.getInstance(); System.out.println( "当前时间为:" ); System.out.println(c.get(Calendar.YEAR)+ "年" +(c.get(Calendar.MONTH)+ 1 )+ "月" +c.get(Calendar.DATE)+ "日" ); System.out.println(c.get(Calendar.HOUR)+ "点" +c.get(Calendar.MINUTE)+ "分" +c.get(Calendar.SECOND)+ "秒" ); System.out.println( "今天是一年中的第:" + c.get(Calendar.DAY_OF_YEAR) + "天" ); System.out.println( "今天是一年中的第:" + c.get(Calendar.WEEK_OF_YEAR) + "个星期" ); } } |
方法二:
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import java.util.Date; import java.text.SimpleDateFormat; public class NowString { public static void main(String[] args) { SimpleDateFormat df = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" ); //设置日期格式 System.out.println(df.format( new Date())); // new Date()为获取当前系统时间 } } |
方法三:
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import java.util.Date; import java.util.Calendar; import java.text.SimpleDateFormat; public class TestDate{ public static void main(String[] args){ Date now = new Date(); SimpleDateFormat dateFormat = new SimpleDateFormat( "yyyy/MM/dd HH:mm:ss" ); //可以方便地修改日期格式 String hehe = dateFormat.format( now ); System.out.println(hehe); Calendar c = Calendar.getInstance(); //可以对每个时间域单独修改 int year = c.get(Calendar.YEAR); int month = c.get(Calendar.MONTH); int date = c.get(Calendar.DATE); int hour = c.get(Calendar.HOUR_OF_DAY); int minute = c.get(Calendar.MINUTE); int second = c.get(Calendar.SECOND); System.out.println(year + "/" + month + "/" + date + " " +hour + ":" +minute + ":" + second); } } |
原文链接:https://www.idaobin.com/archives/366.html