日期对象和日期字符串的相互转换

1.DateUtil.parseDate(posTime, "yyyy-MM-dd HH:mm:ss")将string编程date

 Date d = new SimpleDateFormat("yyyy-MM-dd").parse("2005-01-01");//将日期字符串转为日期对象,结果为

Fri Jan 23 00:00:00 CST 2015

public static void main(String[] args) throws ParseException {
    SimpleDateFormat s = new SimpleDateFormat("yyyy-MM-dd");
    Date d = s.parse("2015-01-23");
    System.out.println(d);//Fri Jan 23 00:00:00 CST 2015
}

2.DateUtil.format(new date(),"yyyy-MM-dd HH:mm:ss")返回string

SimpleDateFormat s = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String t = s.format(new Date());
System.out.println(t);//2017-06-06 11:24:52