1 package com.b510.number2char;
  2
  3 import java.math.BigDecimal;
  4
  5 /**
  6  * 数字转换为汉语中人民币的大写<br>
  7  *
  8  * @author hongten
  9  * @contact hongtenzone@foxmail.com
 10  * @create 2013-08-13
 11  */
 12 public class NumberToCN {
 13     /**
 14      * 汉语中数字大写
 15      */
 16     private static final String[] CN_UPPER_NUMBER = { "零", "壹", "贰", "叁", "肆",
 17             "伍", "陆", "柒", "捌", "玖" };
 18     /**
 19      * 汉语中货币单位大写，这样的设计类似于占位符
 20      */
 21     private static final String[] CN_UPPER_MONETRAY_UNIT = { "分", "角", "元",
 22             "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿", "拾", "佰", "仟", "兆", "拾",
 23             "佰", "仟" };
 24     /**
 25      * 特殊字符：整
 26      */
 27     private static final String CN_FULL = "整";
 28     /**
 29      * 特殊字符：负
 30      */
 31     private static final String CN_NEGATIVE = "负";
 32     /**
 33      * 金额的精度，默认值为2
 34      */
 35     private static final int MONEY_PRECISION = 2;
 36     /**
 37      * 特殊字符：零元整
 38      */
 39     private static final String CN_ZEOR_FULL = "零元" + CN_FULL;
 40
 41     /**
 42      * 把输入的金额转换为汉语中人民币的大写
 43      *
 44      * @param numberOfMoney
 45      *            输入的金额
 46      * @return 对应的汉语大写
 47      */
 48     public static String number2CNMontrayUnit(BigDecimal numberOfMoney) {
 49         StringBuffer sb = new StringBuffer();
 50         // -1, 0, or 1 as the value of this BigDecimal is negative, zero, or
 51         // positive.
 52         int signum = numberOfMoney.signum();
 53         // 零元整的情况
 54         if (signum == 0) {
 55             return CN_ZEOR_FULL;
 56         }
 57         //这里会进行金额的四舍五入
 58         long number = numberOfMoney.movePointRight(MONEY_PRECISION)
 59                 .setScale(0, 4).abs().longValue();
 60         // 得到小数点后两位值
 61         long scale = number % 100;
 62         int numUnit = 0;
 63         int numIndex = 0;
 64         boolean getZero = false;
 65         // 判断最后两位数，一共有四中情况：00 = 0, 01 = 1, 10, 11
 66         if (!(scale > 0)) {
 67             numIndex = 2;
 68             number = number / 100;
 69             getZero = true;
 70         }
 71         if ((scale > 0) && (!(scale % 10 > 0))) {
 72             numIndex = 1;
 73             number = number / 10;
 74             getZero = true;
 75         }
 76         int zeroSize = 0;
 77         while (true) {
 78             if (number <= 0) {
 79                 break;
 80             }
 81             // 每次获取到最后一个数
 82             numUnit = (int) (number % 10);
 83             if (numUnit > 0) {
 84                 if ((numIndex == 9) && (zeroSize >= 3)) {
 85                     sb.insert(0, CN_UPPER_MONETRAY_UNIT[6]);
 86                 }
 87                 if ((numIndex == 13) && (zeroSize >= 3)) {
 88                     sb.insert(0, CN_UPPER_MONETRAY_UNIT[10]);
 89                 }
 90                 sb.insert(0, CN_UPPER_MONETRAY_UNIT[numIndex]);
 91                 sb.insert(0, CN_UPPER_NUMBER[numUnit]);
 92                 getZero = false;
 93                 zeroSize = 0;
 94             } else {
 95                 ++zeroSize;
 96                 if (!(getZero)) {
 97                     sb.insert(0, CN_UPPER_NUMBER[numUnit]);
 98                 }
 99                 if (numIndex == 2) {
100                     if (number > 0) {
101                         sb.insert(0, CN_UPPER_MONETRAY_UNIT[numIndex]);
102                     }
103                 } else if (((numIndex - 2) % 4 == 0) && (number % 1000 > 0)) {
104                     sb.insert(0, CN_UPPER_MONETRAY_UNIT[numIndex]);
105                 }
106                 getZero = true;
107             }
108             // 让number每次都去掉最后一个数
109             number = number / 10;
110             ++numIndex;
111         }
112         // 如果signum == -1，则说明输入的数字为负数，就在最前面追加特殊字符：负
113         if (signum == -1) {
114             sb.insert(0, CN_NEGATIVE);
115         }
116         // 输入的数字小数点后两位为"00"的情况，则要在最后追加特殊字符：整
117         if (!(scale > 0)) {
118             sb.append(CN_FULL);
119         }
120         return sb.toString();
121     }
122
123     public static void main(String[] args) {
124         double money = 2020004.01;
125         BigDecimal numberOfMoney = new BigDecimal(money);
126         String s = NumberToCN.number2CNMontrayUnit(numberOfMoney);
127         System.out.println("你输入的金额为：【"+ money +"】   #--# [" +s.toString()+"]");
128     }
129 }