java-阿拉伯数字转换为汉子数字

代码：

public class Test {

    private static final String[] units = {"", "十", "百", "千", "万", "十", "百", "千", "亿"};
    private static final char[] nums = {'零', '一', '二', '三', '四', '五', '六', '七', '八', '九'};

    public static void main(String[] args) {
        System.out.println(formatInteger(1500));
    }

    public static String formatInteger(int num) {
        StringBuilder sb = new StringBuilder();
        char[] val = String.valueOf(num).toCharArray();
        int len = val.length;
        for (int i = 0; i < len; i++) {
            String m = String.valueOf(val[i]);
            int n = Integer.valueOf(m);
            if (n == 0) {
                //如果当前位置的前一个位置是0 忽略
                if (len > 1 && '0' == val[i - 1]) {
                    continue;
                } else {
                    sb.append(nums[n]);
                }
            } else {
                String numStr = String.valueOf(nums[n]);
                String unitStr = units[(len - 1) - i];
                //特殊处理 一十 --> 十
                if("一".equals(numStr) && "十".equals(unitStr)) {
                    sb.append(unitStr);
                } else {
                    sb.append(numStr).append(unitStr);
                }

            }
        }

        //去除尾部多余的零
        String s = sb.toString();
        if(s.length() > 1 && "零".equals(String.valueOf(s.charAt(s.length()-1))))
            s = s.substring(0, s.length()-1);

        return s;
    }

}

运行结果：

一千五百