如何利用java得到当前的时间和前一天的时间

核心提示：1.得到当前的时间view plaincopy to clipboardPRint?Calendar cal = Calendar.getInstance();String time=formatter.format(cal.getTime()); String strEnd=time.substring(0, 16)

1.得到当前的时间

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Calendar　 cal　 =　 Calendar.getInstance();　　
String time=formatter.format(cal.getTime());　 
String strEnd=time.substring(0, 16);// 2007-10-30 09:30　
Calendar　 cal　 =　 Calendar.getInstance();
String time=formatter.format(cal.getTime());
String strEnd=time.substring(0, 16);// 2007-10-30 09:30

2.得到前一天的时间

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Calendar　 c　 =　 Calendar.getInstance();　　
c.add(Calendar.DAY_OF_MONTH, -1);　 
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");　 
String mDateTime=formatter.format(c.getTime());　 
String strStart=mDateTime.substring(0, 16);//2007-10-29 09:30　
　Calendar　 c　 =　 Calendar.getInstance();
　c.add(Calendar.DAY_OF_MONTH, -1);
　SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
　String mDateTime=formatter.format(c.getTime());
　String strStart=mDateTime.substring(0, 16);//2007-10-29 09:30　

3.得到前几天的时间

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Calendar　 c　 =　 Calendar.getInstance();　　
c.add(Calendar.DAY_OF_MONTH, -5);//得到前5　 
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");　 
String mDateTime=formatter.format(c.getTime());　 
String strStart=mDateTime.substring(0, 16);//2007-10-24 09:30　
　Calendar　 c　 =　 Calendar.getInstance();
　c.add(Calendar.DAY_OF_MONTH, -5);//得到前5
　SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
　String mDateTime=formatter.format(c.getTime());
　String strStart=mDateTime.substring(0, 16);//2007-10-24 09:30

4.得到当前时间的前几年的时间

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Calendar　 c　 =　 Calendar.getInstance();　　
c.add(Calendar.YEAR, -5);//得到前5年　 
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");　 
String mDateTime=formatter.format(c.getTime());　 
String strStart=mDateTime.substring(0, 16);//2002-10-24 09:30　
Calendar　 c　 =　 Calendar.getInstance();
c.add(Calendar.YEAR, -5);//得到前5年
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String mDateTime=formatter.format(c.getTime());
String strStart=mDateTime.substring(0, 16);//2002-10-24 09:30

补充：我要用的是前一天零点的时间，所以这样写：

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Calendar c = Calendar.getInstance();　 
c.add(Calendar.DAY_OF_MONTH, -1);　 
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd 00:00:00");　　　
String theDayBeforeToday = formatter.format(c.getTime());