java获取当前时间前一周、前一月、前一年的时间

SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Calendar c = Calendar.getInstance();
         
        //过去七天
        c.setTime(new Date());
        c.add(Calendar.DATE, - 7);
        Date d = c.getTime();
        String day = format.format(d);
        System.out.println("过去七天："+day);
         
        //过去一月
        c.setTime(new Date());
        c.add(Calendar.MONTH, -1);
        Date m = c.getTime();
        String mon = format.format(m);
        System.out.println("过去一个月："+mon);
         
        //过去三个月
        c.setTime(new Date());
        c.add(Calendar.MONTH, -3);
        Date m3 = c.getTime();
        String mon3 = format.format(m3);
        System.out.println("过去三个月："+mon3);
         
        //过去一年
        c.setTime(new Date());
        c.add(Calendar.YEAR, -1);
        Date y = c.getTime();
        String year = format.format(y);
        System.out.println("过去一年："+year);

//实例

public void setStartAndEndDate(){

 SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
   Calendar c = Calendar.getInstance();
   String sdate = DateUtils.getDate();
   //过去一月
   c.setTime(new Date());
   c.add(Calendar.MONTH, -1);
   Date m = c.getTime();
   String mon = format.format(m);
   System.out.println("过去一个月："+mon);
   StartDate = DateUtils.parseDate(mon);
   EndDate = DateUtils.parseDate(sdate);
}

 思路来源： https://www.cnblogs.com/bunuo/p/6140750.html