java递归算法实现 数字人民币大写转换

最近穷死了 ，没钱吃饭ing 写点钱给自己吧！
public class Test{  
    public static String getChar(long a){
        int b = (int)a;
        Map  map = new HashMap();
        map.put(0,"零");
        map.put(1,"壹");
        map.put(2,"贰");
        map.put(3,"叁");
        map.put(4,"肆");
        map.put(5,"伍");
        map.put(6,"陆");
        map.put(7,"柒");
        map.put(8,"捌");
        map.put(9,"玖"); 
        return  map.get(b).toString();
    }
 
    public static void main(String args[]) throws Exception {  

      String chinese0 = getChineseMoney(1007L);
      System.out.println("我有"+chinese0 + "圓");
 
      String chinese = getChineseMoney(10155530665347L);
      System.out.println("我有"+chinese + "圓");
 
      String chinese2 = getChineseMoney(10100065347L);
      System.out.println("我有"+chinese2 +"圓");
 
      String chinese3 = getChineseMoney(1013333223300065347L);
      System.out.println("我穷死了。"+chinese3 +"圓"); 

    }
 
    public static String getChineseMoney(long alb){
        int len = String.valueOf(alb).length();
        switch (len){
            case 1:
                return  getChar(alb);
            case 2:
                return alb % 10 == 0 ? (alb/10  == 1 ? "": getChar(alb/10))+"拾" : getChar(alb/10)+"拾" +getChar(alb%10);
            case 3:
                if( alb % 100 == 0) {
                    return getChar(alb / 100) + "佰";
                }
                if(String.valueOf(alb).charAt(1) == '0'){
                    return getChar(alb / 100) + "佰"+getChar(0)+getChar(alb % 100);
                }else{
                    return getChar(alb / 100) + "佰" + getChineseMoney(alb % 100);
                }
            case 4:
                if( alb % 1000 == 0) {
                    return getChar(alb / 1000) + "仟";
                }
                if(String.valueOf(alb).charAt(1) == '0' && String.valueOf(alb).charAt(2) == '0'){
                    return getChar(alb / 1000) + "仟"+getChar(0)+getChar(alb % 100);
                }else if(String.valueOf(alb).charAt(1) == '0'){
                    return getChar(alb / 1000) + "仟" + getChar(0) + getChineseMoney(alb % 100);
                } else {
                    return getChar(alb / 1000) + "仟"  + getChineseMoney(alb % 1000);
                }
            case 5:
 
            case 6:
 
            case 7:
 
            case 8:
                return getChineseMoney(alb / 10000) + "万" + getChineseMoney(alb % 10000);
            case 9:
 
            case 10:
 
            case 11:
 
            case 12:
                return getChineseMoney(alb/(10000*10000L)) + "亿" +  getChineseMoney(alb % (10000*10000L));
            case 13:
 
            case 14:
 
            case 15:
                return getChineseMoney(alb/(10000*10000*10000L)) + "万" +  getChineseMoney(alb % (10000*10000*10000L));
            default:
                return "我穷的只剩下钱了，自己无聊的话加上去吧！";

        }
    }
}