查询最近一周、一个月、根据日期返回星期

1、根据日期返回星期

public static String zhouQi(String sDate) throws ParseException {
    String formater = "yyyy-MM-dd";
    SimpleDateFormat format = new SimpleDateFormat(formater);
    Date date = format.parse(sDate);
    format.applyPattern("E");
    return format.format(date);
}

2、返回最近7天的日期

public static  List<String> past7Days(){
    SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
    List<String> list=new ArrayList<>();
    int day=7;
    for (int i=0 ;i<day;i++){
        Calendar c = Calendar.getInstance();
        c.setTime(new Date());
        c.add(Calendar.DATE, - i);
        Date d = c.getTime();
        list.add(sd.format(d));
    }
    return list;
}

3、返回最近6个月的月份

public static  List<String> pastHalfYear(){
    SimpleDateFormat sd = new SimpleDateFormat("MM");
    List<String> list=new ArrayList<>();
    int day=6;
    for (int i=0 ;i<day;i++){
        Calendar c = Calendar.getInstance();
        c.setTime(new Date());
        c.add(Calendar.MONTH, -i);
        list.add(sd.format(c.getTime()));
    }
    return list;
}