Decimal转人民币大写java实现

java，转人民币大写，工具类

完整工具类如下：

package com.example.demo.utils;

import java.math.BigDecimal;


public class Decimal2CnUtil {

    
    private static final String[] CN_UPPER_NUMBER = {"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};
    
    private static final String[] UPPER_MONETARY_UNIT = {"", "拾", "佰", "仟"};
    
    private static final String CN_FULL = "整";
    
    private static final String CN_NEGATIVE = "负";
    
    private static final String ZERO_NUM = "零";
    
    private static final int MONEY_PRECISION = 2;
    
    private static final String CN_ZERO_FULL = "零元" + CN_FULL;

    
    public static String number2CNMonetaryUnit(BigDecimal numberOfMoney) {

        StringBuilder sb = new StringBuilder();
        // -1, 0, or 1 as the value of this BigDecimal is negative, zero, or positive.
        int signNum = numberOfMoney.signum();
        // 零元整的情况
        if (signNum == 0) {
            return CN_ZERO_FULL;
        }
        // 这里会进行金额的四舍五入
        long number = numberOfMoney.movePointRight(MONEY_PRECISION).setScale(0, 4).abs().longValue();
        // 得到小数点后两位值
        long scale = number % 100;

        String sc = changeScale2String(scale);

        number = (number / 100);

        long first4Pos = number % 10000L;
        String fir4Pos = change4Pos2String(first4Pos);
        number = number / 10000;
        long second4Pos = number% 10000L;
        String sec4Pos = change4Pos2String(second4Pos);
        number = number / 10000;
        long third4Pos = number % 10000L;
        String thi4Pos = change4Pos2String(third4Pos);
        number = number / 10000;
        long four4Pos = number % 10000L;
        String fo4Pos = change4Pos2String(four4Pos);

        
        if(fo4Pos.length() > 1){
            sb.append(fo4Pos).append("萬");
        }
        if(thi4Pos.length() > 1){
            sb.append(thi4Pos).append("億");
        }
        if(sec4Pos.length() > 1){
            sb.append(sec4Pos).append("萬");
        }
        if(fir4Pos.length() > 1){
            sb.append(fir4Pos).append("圆");
        }
        sb.append(sc);
        String result = removeLeftZero(sb.toString());
        if(signNum < 0){
            return CN_NEGATIVE + result;
        }
        return result;
    }

    
    private static String change4Pos2String(long num){
        if(num == 0){
            return ZERO_NUM;
        }
        StringBuilder sb = new StringBuilder();
        int time = 3;
        int init = 1000;
        long val = num / init;
        while(time >= 0){
            num = num % init;
            if(val == 0){
                if(!sb.toString().endsWith(ZERO_NUM)){
                    sb.append(ZERO_NUM);
                }
            }else{
                sb.append(CN_UPPER_NUMBER[(int) val]).append(UPPER_MONETARY_UNIT[time]);
            }
            init = init / 10;
            if(init != 0){
                val = num / init;
            }
            time--;
        }
        return removeRightZero(sb.toString());
    }

    
    private static String changeScale2String(long scale){
        if(scale  == 0){
            return "整";
        }else if(scale % 10 == 0){
            return CN_UPPER_NUMBER[(int)scale/10] + "角";
        }else{
            return CN_UPPER_NUMBER[(int)scale/10] + "角" + CN_UPPER_NUMBER[(int)scale % 10] + "分";
        }
    }

    
    private static String removeLeftZero(String sb){
        while(sb.startsWith(ZERO_NUM)){
            sb = sb.substring(1);
        }
        return sb;
    }

    
    private static String removeRightZero(String sb){
        while(sb.endsWith(ZERO_NUM)){
            sb = sb.substring(0, sb.length() - 1);
        }
        return sb;
    }

    public static void main(String[] args) {
        // String je ="4302085.7";
        // String je ="1,3120,0021,0003.45";
        String je ="1312000210003.45";
        BigDecimal numberOfMoney = new BigDecimal(je);
        String s = Decimal2CnUtil.number2CNMonetaryUnit(numberOfMoney);
        System.out.println(s);
    }

}