使用Java如何实现转换金额的大小写

 public class MoneyUtil {      private static final String[] NUMBERS = { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" };      private static final String[] IUNIT = { "元", "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿", "拾", "佰", "仟", "万", "拾", "佰",       "仟" };      private static final String[] DUNIT = { "角", "分", "厘" };       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);   }       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;   }       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 &#63; key : (NUMBERS[integers[i]] + IUNIT[length - i - 1]));     }     return chineseInteger.toString();   }       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 &#63; "" : (NUMBERS[decimals[i]] + DUNIT[i]));     }     return chineseDecimal.toString();   }       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));   }  }