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);