Java小写金额转换大写与金额比对（支持繁体大写金额）

package com.gerrard.pmc.util;

import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;

/**
* 金额工具类
*
* @author GERRARD
*/
public final class MoneyUtil {

/**
* 大写数字
*/
private static final String[] NUMBERS = { "零", "壹", "贰", "叁", "肆", "伍",
"陆", "柒", "捌", "玖" };

/**
* 整数单位
*/
private static final String[] IUNIT = { "元", "拾", "佰", "仟", "万", "拾", "佰",
"仟", "亿", "拾", "佰", "仟", "万", "拾", "佰", "仟" };

/**
* 小数单位
*/
private static final String[] DUNIT = { "角", "分", "厘" };

/**
* 大写金额
* @param str
* @return
*/
public static String toChinese(String str)
{
str = str.replaceAll(",", "");// 去掉","

String integerStr;// 整数部分数字

String decimalStr;// 小数部分数字

// 初始化：分离整数部分和小数部分
if (str.indexOf(".") > 0)
{
integerStr = str.substring(0, str.indexOf("."));

decimalStr = str.substring(str.indexOf(".") + 1);

} else if (str.indexOf(".") == 0)
{
integerStr = "";
decimalStr = str.substring(1);

} else
{
integerStr = str;
decimalStr = "";
}

// integerStr去掉首0，不必去掉decimalStr的尾0(超出部分舍去)
if (!integerStr.equals(""))
{
integerStr = Long.toString(Long.parseLong(integerStr));

if (integerStr.equals("0"))
{
integerStr = "";
}
}

// overflow超出处理能力，直接返回
if (integerStr.length() > IUNIT.length)
{
System.out.println(str + ":超出处理能力");
return str;
}

int[] integers = toArray(integerStr);// 整数部分数字

boolean isMust5 = isMust5(integerStr);// 设置万单位

int[] decimals = toArray(decimalStr);// 小数部分数字

return getChineseInteger(integers, isMust5)
+ getChineseDecimal(decimals);
}

/**
* 整数部分和小数部分转换为数组，从高位至低位
* @param number
* @return
*/
private static int[] toArray(String number)
{
int[] array = new int[number.length()];

for (int i = 0; i < number.length(); i++)
{
array[i] = Integer.parseInt(number.substring(i, i + 1));
}
return array;
}

/**
* 中文整数金额
* @param integers
* @param isMust5
* @return
*/
private static String getChineseInteger(int[] integers, boolean isMust5)
{
StringBuffer chineseInteger = new StringBuffer("");

int length = integers.length;

for (int i = 0; i < length; i++)
{
// 0出现在关键位置：1234(万)5678(亿)9012(万)3456(元)
// 特殊情况：10(拾元、壹拾元、壹拾万元、拾万元)
String key = "";

if (integers[i] == 0)
{
if ((length - i) == 13)// 万(亿)(必填)
{
key = IUNIT[4];
}

else if ((length - i) == 9)// 亿(必填)
{
key = IUNIT[8];
}

else if ((length - i) == 5 && isMust5)// 万(不必填)
{
key = IUNIT[4];
}

else if ((length - i) == 1)// 元(必填)
{
key = IUNIT[0];
}

// 0遇非0时补零，不包含最后一位
if ((length - i) > 1 && integers[i + 1] != 0)
{
key += NUMBERS[0];
}

}
chineseInteger.append(integers[i] == 0 ? key
: (NUMBERS[integers[i]] + IUNIT[length - i - 1]));
}
return chineseInteger.toString();
}

/**
* 中文小数金额
* @param decimals
* @return
*/
private static String getChineseDecimal(int[] decimals)
{
StringBuffer chineseDecimal = new StringBuffer("");

for (int i = 0; i < decimals.length; i++)
{
// 舍去3位小数之后的
if (i == 3)
break;

chineseDecimal.append(decimals[i] == 0 ? ""
: (NUMBERS[decimals[i]] + DUNIT[i]));
}
return chineseDecimal.toString();
}

/**
* 第五位数字是否加万
* @param integerStr
* @return
*/
private static boolean isMust5(String integerStr)
{
int length = integerStr.length();

if (length > 4)
{
String subInteger = "";

if (length > 8)
{
// 取得从低位数，第5到第8位的字串
subInteger = integerStr.substring(length - 8, length - 4);
} else
{
subInteger = integerStr.substring(0, length - 4);
}
return Integer.parseInt(subInteger) > 0;
} else
{
return false;
}
}

/**
* 大小写金额比较 支持最小单位：厘
*
* @param amount
*            小写金额
* @param chineseAmount
*            大写金额
* @return
*/
public static boolean isAmtEqChn(String amount, String chineseAmount) {

if (StringUtils.isBlank(chineseAmount))
{
return false;
}

// 格式化大写金额去整
chineseAmount = chineseAmount.replace("整", "");
chineseAmount = chineseAmount.replace("正", "");
chineseAmount = chineseAmount.replace("人民币", "");

chineseAmount = toSimplified(chineseAmount);

String toChnAmt = toChinese(amount);

if (chineseAmount.equals(toChnAmt))
{
return true;
}
return false;
}

/**
* 大写金额简体化
*
* @param chnAmt
* @return
*/
public static String toSimplified(String chnAmt) {

if (StringUtils.isBlank(chnAmt))
{
return null;
}

char[] amtArrChar = chnAmt.toCharArray();

Map<String, String> mapping = getSimpToTradMapping();

for (int i = 0; i < amtArrChar.length; i++)
{
if (mapping.containsKey(String.valueOf(amtArrChar[i])))
{
amtArrChar[i] = mapping.get(String.valueOf(amtArrChar[i]))
.charAt(0);
}
}

return String.valueOf(amtArrChar);
}

/**
* 繁体对应
*
* @return
*/
private static Map<String, String> getSimpToTradMapping()
{

Map<String, String> mapping = new HashMap<String, String>();

mapping.put("圆", "元");
mapping.put("圓", "元");
mapping.put("貳", "贰");
mapping.put("陸", "陆");
mapping.put("億", "亿");
mapping.put("萬", "万");

return mapping;
}

public static void main(String[] args) {

String amount = "99999.99";

System.out.println("小写金额" + amount + "转换大写金额:" + toChinese("99999.99"));

String chnAmount = "玖萬玖仟玖佰玖拾玖圓玖角玖分";

System.out.println(chnAmount + "-简体化:" + toSimplified(chnAmount));

System.out.println("小写金额：" + amount + " 与 大写金额:" + chnAmount + "比较结果--------"+ isAmtEqChn(amount, chnAmount));
}
}