Java版 数字金额大写转换

    public class ConvertNumberToUpper {  
        public static void main(String agrs[]) {  
            // 整数  
            System.out.println(digitUppercase(0)); // 零元整  
            System.out.println(digitUppercase(123)); // 壹佰贰拾叁元整  
            System.out.println(digitUppercase(1000000)); // 壹佰万元整  
            System.out.println(digitUppercase(100000001)); // 壹亿零壹元整  
            System.out.println(digitUppercase(1000000000)); // 壹拾亿元整  
            System.out.println(digitUppercase(1234567890)); // 壹拾贰亿叁仟肆佰伍拾陆万柒仟捌佰玖拾元整  
            System.out.println(digitUppercase(1001100101)); // 壹拾亿零壹佰壹拾万零壹佰零壹元整  
            System.out.println(digitUppercase(110101010)); // 壹亿壹仟零壹拾万壹仟零壹拾元整  
            System.out.println();  
            // 小数  
            System.out.println(digitUppercase(0.12)); // 壹角贰分  
            System.out.println(digitUppercase(123.34)); // 壹佰贰拾叁元叁角肆分  
            System.out.println(digitUppercase(97001.34)); // 壹佰贰拾叁元叁角肆分  
            System.out.println(digitUppercase(1000000.56)); // 壹佰万元伍角陆分  
            System.out.println(digitUppercase(100000001.78)); // 壹亿零壹元柒角捌分  
            System.out.println(digitUppercase(1000000000.90)); // 壹拾亿元玖角  
            System.out.println(digitUppercase(1234567890.03)); // 壹拾贰亿叁仟肆佰伍拾陆万柒仟捌佰玖拾元叁分  
            System.out.println(digitUppercase(1001100101.00)); // 壹拾亿零壹佰壹拾万零壹佰零壹元整  
            System.out.println(digitUppercase(110101010.10)); // 壹亿壹仟零壹拾万壹仟零壹拾元壹角  
              
            // 负数  
            System.out.println(digitUppercase(-0.12)); // 负壹角贰分  
            System.out.println(digitUppercase(-123.34)); // 负壹佰贰拾叁元叁角肆分  
            System.out.println(digitUppercase(-1000000.56)); // 负壹佰万元伍角陆分  
            System.out.println(digitUppercase(-100000001.78)); // 负壹亿零壹元柒角捌分  
            System.out.println(digitUppercase(-1000000000.90)); // 负壹拾亿元玖角  
            System.out.println(digitUppercase(-1234567890.03)); // 负壹拾贰亿叁仟肆佰伍拾陆万柒仟捌佰玖拾元叁分  
            System.out.println(digitUppercase(-1001100101.00)); // 负壹拾亿零壹佰壹拾万零壹佰零壹元整  
            System.out.println(digitUppercase(-110101010.10)); // 负壹亿壹仟零壹拾万壹仟零壹拾元壹角  
        }  
          
        /** 
         * 数字金额大写转换，思想先写个完整的然后将如零拾替换成零 要用到正则表达式 
         */  
        public static String digitUppercase(double n) {  
            String fraction[] = { "角","分"};  
            String digit[] = { "零","壹","贰","叁","肆","伍","陆","柒","捌","玖"};  
            String unit[][] = { { "元","万","亿"},{ "","拾","佰","仟"}};  
              
            String head = n < 0 ? "负" : "";  
            n = Math.abs(n);  
              
            String s = "";  
            for (int i = 0; i < fraction.length; i++) {  
                s += (digit[(int) (Math.floor(n * 10 * Math.pow(10,i)) % 10)] + fraction[i]).replaceAll("(零.)+","");  
            }  
            if (s.length() < 1) {  
                s = "整";  
            }  
            int integerPart = (int) Math.floor(n);  
              
            for (int i = 0; i < unit[0].length && integerPart > 0; i++) {  
                String p = "";  
                for (int j = 0; j < unit[1].length && n > 0; j++) {  
                    p = digit[integerPart % 10] + unit[1][j] + p;  
                    integerPart = integerPart / 10;  
                }  
                s = p.replaceAll("(零.)*零$","").replaceAll("^$","零") + unit[0][i] + s;  
            }  
            return head + s.replaceAll("(零.)*零元","元").replaceFirst("(零.)+","").replaceAll("(零.)+","零").replaceAll("^整$","零元整");  
        }  
    }