计算日期的星期几

 

使用 joda.time 来计算

 

/**
     * 得到日期所属的星期几
     * 
     * @param dateTime
     * @return
     * @author kanpiaoxue
     * @CreateTime: 2019/12/26 10:34:29
     * @Description:
     */
    public String dayOfWeek(DateTime dateTime) {
        Preconditions.checkNotNull(dateTime, "dateTime is null");
        int dayOfWeek = dateTime.getDayOfWeek();
        String num = null;
        switch (dayOfWeek) {
            case DateTimeConstants.MONDAY:
                num = "一";
                break;
            case DateTimeConstants.TUESDAY:
                num = "二";
                break;
            case DateTimeConstants.WEDNESDAY:
                num = "三";
                break;
            case DateTimeConstants.THURSDAY:
                num = "四";
                break;
            case DateTimeConstants.FRIDAY:
                num = "五";
                break;
            case DateTimeConstants.SATURDAY:
                num = "六";
                break;
            case DateTimeConstants.SUNDAY:
                num = "日";
                break;
            default:
                throw new IllegalArgumentException(String.format("can not found dayOfWeek:%s", dayOfWeek));
        }
        return String.format("星期%s", num);
    }