数字类型转中文大写工具类

public class CurrencyUtils {
    public CurrencyUtils() {
    }

    public static String numToStr(int num) {
        String[] chinese = new String[]{"", "十", "百", "千", "万", "十", "百", "千", "亿", "十", "百", "千", "万"};
        String[] numChinese = new String[]{"零", "一", "二", "三", "四", "五", "六", "七", "八", "九"};
        String str = String.valueOf(num);
        char[] chars = str.toCharArray();
        StringBuffer sb = new StringBuffer();

        for(int i = 0; i < chars.length; ++i) {
            sb.append(numChinese[Integer.valueOf(String.valueOf(chars[i])).intValue()]).append(chinese[chars.length - i - 1]);
        }

        return sb.toString();
    }

    public static String numToLocalStr(int num) {
        String[] chinese = new String[]{"", "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿", "拾", "佰", "仟", "万"};
        String[] numChinese = new String[]{"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};
        String str = String.valueOf(num);
        char[] chars = str.toCharArray();
        StringBuffer sb = new StringBuffer();

        for(int i = 0; i < chars.length; ++i) {
            sb.append(numChinese[Integer.valueOf(String.valueOf(chars[i])).intValue()]).append(chinese[chars.length - i - 1]);
        }

        return sb.toString() + "元整";
    }

    public static String bigDecimalToLocalStr(BigDecimal bigDecimal) {
        String[] chinese = new String[]{"", "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿", "拾", "佰", "仟", "万"};
        String[] numChinese = new String[]{"零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖"};
        String[] afterChinese = new String[]{"角", "分"};
        String str = String.valueOf(bigDecimal);
        String[] arr = str.split("\\.");
        char[] chars = arr[0].toCharArray();
        StringBuffer sb = new StringBuffer();

        for(int i = 0; i < chars.length; ++i) {
            sb.append(numChinese[Integer.valueOf(String.valueOf(chars[i])).intValue()]).append(chinese[chars.length - i - 1]);
        }

        if (arr.length == 1) {
            return sb.toString() + "元整";
        } else if (arr[1].length() > 2) {
            throw new IllegalArgumentException("人民币大写转换BigDecimal只能保留2位小数");
        } else {
            sb.append("元");
            char[] chars1 = arr[1].toCharArray();

            for(int i = 0; i < chars1.length; ++i) {
                sb.append(numChinese[Integer.valueOf(String.valueOf(chars1[i])).intValue()]).append(afterChinese[i]);
            }

            return sb.toString();
        }
    }

    public static void main(String[] args) {
        int num = 1234;
        System.out.println(numToStr(num));
        System.out.println(numToLocalStr(num));

        BigDecimal bigDecimal = new BigDecimal("1234.56");
        System.out.println(bigDecimalToLocalStr(bigDecimal));
    }
}