金钱转化

public final class Demo
{

    /**
     * 输入要转换的阿拉伯数字的金额<br>
     * 输入值非法或异常时返回null
     * 
     * @param n 需要输入的数字（n>0）
     * @return 转换后的中国传统金额字符串
     * 
     */
	final static char[] cnNumbers = {'零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖'};
	final char[] series = {'元', '拾', '佰', '仟', '万'};
    public static String convert(int money)
    {
    	if(money <= 0) return null;
    	StringBuffer sb = new StringBuffer();
    	if(money >= 100000000){
    		sb.append(subConvertBy4(money/100000000));
    		money %= 100000000;
    		sb.append("亿");
    		
    	}
    	if(money >= 10000){
    		sb.append(subConvertBy4(money/10000));
    		money %= 10000;
    		sb.append("万");
    	}
    	sb.append(subConvertBy4(money));
    	sb.append("元");
    	if (sb.toString().startsWith("零")) {
			sb.deleteCharAt(0);
		}
        return sb.toString();
    }
    public static String subConvertBy4(int money){
    	StringBuffer sb = new StringBuffer();
    	if (money >= 1000) {
			sb.append(cnNumbers[money / 1000]);
			sb.append("仟");
			money %= 1000;
		}else{
			sb.append("零");
		}
    	if (money >= 100) {
			sb.append(cnNumbers[money / 100]);
			sb.append("佰");
			money %= 100;
		}else{
			if(!sb.toString().endsWith("零")){
				sb.append("零");
			}
		}
    	if (money >= 10) {
			sb.append(cnNumbers[money / 10]);
			sb.append("拾");
			money %= 10;
		}else{
			if(!sb.toString().endsWith("零")){
				sb.append("零");
			}
		}
    	if (money >= 1) {
			sb.append(cnNumbers[money / 1]);
			money %= 1;
		}else{
			if(!sb.toString().endsWith("零")){
				sb.append("零");
			}
		}
    	if(sb.toString().endsWith("零")){
    		return sb.deleteCharAt(sb.length() - 1).toString();
    	}
    	return sb.toString();
    }
}