Java 获取近七天、近六个月（包含今天，本月）

        List dateList = new ArrayList<>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        for (int i = 0; i < 7; i++) {
            Date date = DateUtils.addDays(new Date(), -i);
            String formatDate = sdf.format(date);
            dateList.add(formatDate);
        }
 

 获取近六个月

1.不带年份的

    List resultList = new ArrayList();
        Calendar cal = Calendar.getInstance();
        //近六个月
        cal.set(Calendar.MONTH, cal.get(Calendar.MONTH)+1); //要先+1,才能把本月的算进去
        for(int i=0; i<6; i++){
            cal.set(Calendar.MONTH, cal.get(Calendar.MONTH)-1); //逐次往前推1个月
            resultList.add( (cal.get(Calendar.MONTH)+1 < 10 ? "0" 
                    + (cal.get(Calendar.MONTH)+1) : String.valueOf((cal.get(Calendar.MONTH)+1))));
        }

 2.带年份的

    List resultList = new ArrayList();
        Calendar cal = Calendar.getInstance();
        //近六个月
        cal.set(Calendar.MONTH, cal.get(Calendar.MONTH)+1); //要先+1,才能把本月的算进去
        for(int i=0; i<6; i++){
            cal.set(Calendar.MONTH, cal.get(Calendar.MONTH)-1); //逐次往前推1个月
            resultList.add(String.valueOf(cal.get(Calendar.YEAR)) 
                    +"-"+ (cal.get(Calendar.MONTH)+1 < 10 ? "0" + 
                        (cal.get(Calendar.MONTH)+1) : (cal.get(Calendar.MONTH)+1)));
        }