Date、String、Calendar类型之间的转化

1.Calendar 转化 String //获取当前时间的具体情况,如年,月,日,week,date,分,秒等 Calendar calendat = Calendar.getInstance();SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");String dateStr = sdf.format(calendar.getTime()); 2.String 转化CalendarString str="2010-5-27";SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");Date date =sdf.parse(str);Calendar calendar = Calendar.getInstance();calendar.setTime(date); 3.Date 转化StringSimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");String dateStr=sdf.format(new Date()); 4.String 转化Date String str="2010-5-27";SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM-dd");Date birthday = sdf.parse(str); 5.Date 转化CalendarCalendar calendar = Calendar.getInstance();calendar.setTime(new java.util.Date()); 6.Calendar转化DateCalendar calendar = Calendar.getInstance();java.util.Date date =calendar.getTime();