Enum遇到下拉框

package com.zj.tool;

public enum WeekDay {
    Mon("Monday",),
    Tue("Tuesday",),
    Wed("Wednesday",),
    Thu("Thursday",),
    Fri("Friday",),
    Sat("Saturday",),
    Sun("Sunday",);

    /**定义枚举类型自己的属性**/
    private final String day;
    private final int dayNum;
    private WeekDay(String day,int dayNum) {
        this.day = day;
        this.dayNum = dayNum;
    }

    public int getDayNum()
    {
        return dayNum;
    }

    /**定义枚举类型自己的方法**/
    public static void printDay(int i){
        switch(i){
            case : System.out.println(WeekDay.Mon); break;
            case : System.out.println(WeekDay.Tue);break;
            case : System.out.println(WeekDay.Wed);break;
            case : System.out.println(WeekDay.Thu);break;
            case : System.out.println(WeekDay.Fri);break;
            case : System.out.println(WeekDay.Sat);break;
            case : System.out.println(WeekDay.Sun);break;
            default:System.out.println("wrong number!");
        }
    }

    public String getDay() {
        return day;
    }
    public static void main(String args[]) {
        for (WeekDay day : WeekDay.values()) {
            System.out.println(day + "====>" + day.getDay()+ "====>" + day.getDayNum());
        }
        WeekDay.printDay();
    }
}

一个很实际的问题,数据库里面存的是数字但是页面要显示字符串,此时就i显示出enum的好处了