Java：String和Date、Timestamp之间的转换

一、String与Date（java.util.Date）互转

     1.1 String -> Date

String dateStr = "2010/05/04 12:34:23";
		Date date = new Date();
		//注意format的格式要与日期String的格式相匹配
		DateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
		try {
			date = sdf.parse(dateStr);
			System.out.println(date.toString());
		} catch (Exception e) {
			e.printStackTrace();
		}

  1.2 Date -> String

   可以设置任意的转换格式format

String dateStr = "";
		Date date = new Date();
		//format的格式可以任意
		DateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
		DateFormat sdf2 = new SimpleDateFormat("yyyy-MM-dd HH/mm/ss");
		try {
			dateStr = sdf.format(date);
			System.out.println(dateStr);
			dateStr = sdf2.format(date);
			System.out.println(dateStr);
		} catch (Exception e) {
			e.printStackTrace();
		}

 二、String与Timestamp互转

 

   2.1 String ->Timestamp

  

Timestamp ts = new Timestamp(System.currentTimeMillis());String tsStr = "2011-05-09 11:49:45";try {ts = Timestamp.valueOf(tsStr);System.out.println(ts);} catch (Exception e) {e.printStackTrace();}

   注：String的类型必须形如： yyyy-mm-dd hh:mm:ss[.f...] 中括号可选，否则报错！！！

 

    2.2 Timestamp -> String

 

Timestamp ts = new Timestamp(System.currentTimeMillis());
		String tsStr = "";
		DateFormat sdf = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
		try {
			//方法一
			tsStr = sdf.format(ts);
			System.out.println(tsStr);
			//方法二
			tsStr = ts.toString();
			System.out.println(tsStr);
		} catch (Exception e) {
			e.printStackTrace();
		}

三、Date（ java.util.Date ）和Timestamp互转

  3.1 Timestamp -> Date

 

Timestamp ts = new Timestamp(System.currentTimeMillis());
		Date date = new Date();
		try {
			date = ts;
			System.out.println(date);
		} catch (Exception e) {
			e.printStackTrace();
		}

   3.2 Date -> Timestamp

Timestamp ts = new Timestamp(date.getTime());