金额转换，阿拉伯数字的金额转换成中国传统大写汉字的形式

package com.lc.recharge.test;import java.math.BigDecimal;public class MoneyUtil {private static final int DFT_SCALE = 2;/** 大写数字 */private static final String[] NUMBERS = { "零", "壹", "贰", "叁", "肆", "伍","陆", "柒", "捌", "玖" };/** 整数部分的单位 */private static final String[] IUNIT = { "元", "拾", "佰", "仟", "万", "拾", "佰","仟", "亿", "拾", "佰", "仟", "万", "拾", "佰", "仟" };/** 小数部分的单位 */private static final String[] DUNIT = { "角", "分", "厘" };/** * 得到大写金额。 */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 */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;}/** * 得到中文金额的整数部分。 */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();}/** * 得到中文金额的小数部分。 */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();}/** * 判断第5位数字的单位"万"是否应加。 */private static boolean isMust5(String integerStr) {int length = integerStr.length();if (length > 4) {String subInteger = "";if (length > 8) { // TODO 12-9-17// 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;}}/** * BigDecimal 相乘,四舍五入保留0位 *  * @param a * @param b * @return a*b */public static BigDecimal mutiply(String a, String b, int roundingMode) {BigDecimal bd = new BigDecimal(a);return bd.multiply(new BigDecimal(b)).setScale(DFT_SCALE, roundingMode);}/** * BigDecimal 相除,四舍五入保留两位 *  * @param a * @param b * @return a/b */public static BigDecimal div(String a, String b, int roundingMode) {BigDecimal decimal1 = new BigDecimal(a);BigDecimal decimal2 = new BigDecimal(b);return decimal1.divide(decimal2, DFT_SCALE, roundingMode);}/** * BigDecimal 相加,四舍五入保留两位 *  * @param a * @param b * @return a+b */public static BigDecimal sum(String a, String b, int roundingMode) {BigDecimal decimal1 = new BigDecimal(a);BigDecimal decimal2 = new BigDecimal(b);// DecimalFormat format = new DecimalFormat("#0.00");return decimal1.add(decimal2).setScale(DFT_SCALE, roundingMode);}/** * BigDecimal 相减,四舍五入保留两位 *  * @param a * @param b * @return a+b */public static BigDecimal sub(String a, String b, int roundingMode) {BigDecimal decimal1 = new BigDecimal(a);BigDecimal decimal2 = new BigDecimal(b);// DecimalFormat format = new DecimalFormat("#0.00");return decimal1.subtract(decimal2).setScale(DFT_SCALE, roundingMode);}/** * 100.00 为10000 *  * @param a * @return */public static BigDecimal format(String a, int roundingMode) {return new BigDecimal(a).multiply(new BigDecimal(100)).setScale(0,roundingMode);}public static void main(String[] args) {String number = "54452";System.out.println(number + " " + MoneyUtil.toChinese(number));number = "32,323,230,200,000,1";System.out.println(number + " " + MoneyUtil.toChinese(number));number = "30000.05";System.out.println(number + " " + MoneyUtil.toChinese(number));number = "30000.00";System.out.println(number + " " + MoneyUtil.toChinese(number));}}