自己写的一个转换数字为中文大写形式的工具类

UpperNumTool.java

import java.math.BigInteger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/** * 实现数字的大写转换 * * @author Lshare * @version V1.0 */
public class UpperNumTool {
    private static String[] upperNums = { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" };
    private static String[] units = { "", "十", "佰", "仟", "万", "亿", "兆" ,"京","垓"};

    public static String upperNum(BigInteger num) {

        String shortNum = num.toString();
        StringBuilder sb = new StringBuilder();
        // 反转字符串,存储到int数组中
        int[] nums = new int[shortNum.length()];
        shortNum = new StringBuilder(shortNum).reverse().toString();
        for (int i = 0; i < nums.length; i++) {
            nums[i] = Integer.valueOf(shortNum.charAt(i) + "");
        }
        // 数字大写化
        for (int i = 0; i < nums.length; i++) {
            if (i % 4 != 0) {
                if (nums[i] != 0) {
                    sb.append(units[i % 4]).append(upperNums[nums[i]]);
                } else {
                    sb.append(upperNums[nums[i]]);
                }
            } else if (i % 4 == 0) {
                if (i != 0) {
                    sb.append(units[i / 4 + 3]).append(nums[i] == 0 ? "" : upperNums[nums[i]]);
                } else {
                    sb.append(upperNums[nums[i]]);
                }
            }
        }
        // 去除首尾的零
        while (sb.toString().startsWith(upperNums[0]) || sb.toString().endsWith(upperNums[0])) {
            if (sb.toString().startsWith(upperNums[0]))
                sb.deleteCharAt(0);
            if (sb.toString().endsWith(upperNums[0]))
                sb.deleteCharAt((sb.length() - 1));
        }
        // 去除中间多余的零
        Pattern p = Pattern.compile("(零){2,}");
        Matcher m = p.matcher(sb);
        if (m.find()) {
            String str = sb.toString().replace(m.group(), upperNums[0]);
            sb = new StringBuilder(str);
        }
        // 去除万、亿、兆等前的零
        for (int i = 4; i < units.length; i++) {
            if (upperNums[0].equals(sb.charAt(sb.indexOf(units[i]) + 1) + "")) {
                sb.deleteCharAt(sb.indexOf(units[i]) + 1);
            }
        }
        return sb.reverse().toString();
    }
}

通过调用这个类，可以实现下面的效果：