package com.gk.firework.Domain.Vo;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Calendar;

public class GenerateCode {

    public static String generateProduct(){
        String code = "";
        Calendar calendar = Calendar.getInstance();
        String year = String.valueOf(calendar.get(Calendar.YEAR));
        int month = calendar.get(Calendar.MONTH)+1;
        int day = calendar.get(Calendar.DATE);
        String two = year.substring(year.length()-2);
        String four = changeMd(month,day);
        code = two + four;
        return code;
    }

    private static String changeMd(int month, int day) {
        String three = "";
        String four = "";

        if (month < 10){
            three = String.valueOf(month);
        }else {
            three = String.valueOf(ConvetInt2Char(month - 10));
        }

        if (day < 10){
            four = String.valueOf(day);
        }else {
            four = String.valueOf(ConvetInt2Char(day - 10));
        }

        return three + four;
    }

    private static char ConvetInt2Char(int i){
        return (char)(i + 'A');
    }


}