金额数字转中文大写(转)

处理能力：
整数部分：9999999999999999(16位长，仟万亿)
小数部分：3位，多于3位舍去(不做四舍五入)

运行结果：
1.23 壹元贰角叁分
1234567890123456.123 壹仟贰佰叁拾肆万伍仟陆佰柒拾捌亿玖仟零壹拾贰万叁仟肆佰伍拾陆元壹角贰分叁厘
0.0798 柒分玖厘
10,001,000.09 壹仟万零壹仟元玖分

01.107700 壹元壹角柒厘

public class MoneyUtil {/** 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) {// 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;}}public static void main(String[] args) {String number = "1.23";System.out.println(number + " " + MoneyUtil.toChinese(number));number = "1234567890123456.123";System.out.println(number + " " + MoneyUtil.toChinese(number));number = "0.0798";System.out.println(number + " " + MoneyUtil.toChinese(number));number = "10,001,000.09";System.out.println(number + " " + MoneyUtil.toChinese(number));number = "01.107700";System.out.println(number + " " + MoneyUtil.toChinese(number));}}