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");

     }

 }