获取上月：
Calendar c = Calendar.getInstance();
c.add(Calendar.MONTH, -1);
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM");
String time = format.format(c.getTime());
//得到一个月最后一天日期(31/30/29/28)
int MaxDay=c.getActualMaximum(Calendar.DAY_OF_MONTH);
//按你的要求设置时间
c.set( c.get(Calendar.YEAR), c.get(Calendar.MONTH), MaxDay, 23, 59, 59);
//按格式输出
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String gtime = sdf.format(c.getTime()); //上月最后一天
/**
* 获取本日日期
* @return
*/
public static String getToDay(){
Calendar c = Calendar.getInstance();
String time = getTime(c);
System.out.println(time);
return time;
}
/**
* 获取本周一日期
* @return
*/
public static String getWeekA(){
Calendar cal =Calendar.getInstance();
cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
//System.out.println(cal.getTime());
String time = getTime(cal)+" 00:00:00";
System.out.println(time);
return time;
}
/**
* 获取本周日日期
* @return
*/
public static String getWeekB(){
Calendar cal =Calendar.getInstance();
//System.out.println(cal.getTime());
//这种输出的是上个星期周日的日期，因为老外那边把周日当成第一天
cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
//System.out.println(cal.getTime());
//增加一个星期，才是我们中国人理解的本周日的日期
cal.add(Calendar.WEEK_OF_YEAR, 1);
//System.out.println(cal.getTime()); //本周日
String time = getTime(cal)+" 23:59:59";
System.out.println(time);
return time;
}
/** * 获取本月日期 * @return */ public static String getMonth(){ Calendar c = Calendar.getInstance(); SimpleDateFormat format = new SimpleDateFormat("yyyy-MM"); String time = format.format(c.getTime()); System.out.println(time); return time; }
