小写转大写

package com.cnblog.util;

import java.math.BigDecimal;

/**
 * 金额转换工具类
 * @author jian.liu
 *
 */
public class MoneyUtil {
    //小写转大写
    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++) {
            double f1 = new BigDecimal(n).setScale(2, BigDecimal.ROUND_HALF_UP)
                    .multiply(new BigDecimal(10 * Math.pow(10, i))).doubleValue();
            s += (digit[(int) (Math.floor(f1) % 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");
    }
}package com.cnblog.util;

import java.m