java阿拉伯数字转换成中文数字

/**
* 阿拉伯数字转中文数字，中文数字转阿拉伯数字。
* 2015年10月30日 上午10:18:06
*
* @auther liuc
*/
public class NumberConventer {
/// <summary>
/// 阿拉伯數字轉中文
/// </summary>
/// <param name="intInput"></param>
/// <returns></returns>
public static String ToConvtZH(Integer intInput)
{
String sd = ToCH(intInput);
String sd2 = sd;
if (intInput== 10)
{
//sd2 = sd.insert(sd.lastIndexOf('十'), "一");
sd2 = "十";
}
return sd2;
}

public static String ToCH(Integer intInput)
{
String si = intInput.toString();
String sd = "";
if (si.length() == 1)     //個
{
sd += GetCH(intInput);
return sd;
}
else if (si.length() == 2)//十
{
if (si.substring(0, 1) == "1")
sd += "十";
else
sd += (GetCH(intInput / 10) + "十");
sd += ToCH(intInput % 10);
}
else if (si.length() == 3)//百
{
sd += (GetCH(intInput / 100) + "百");
if (String.valueOf(intInput % 100).length() < 2 && (intInput % 100) != 0)
sd += "零";
sd += ToCH(intInput % 100);
}
else if (si.length() == 4)//千
{
sd += (GetCH(intInput / 1000) + "千");
if (String.valueOf(intInput % 1000).length() < 3 && (intInput % 1000) != 0)
sd += "零";
sd += ToCH(intInput % 1000);
}
else if (si.length() == 5)//萬
{
sd += (GetCH(intInput / 10000) + "万");
if (String.valueOf(intInput % 10000).length() < 4 && (intInput % 10000) != 0)
sd += "零";
sd += ToCH(intInput % 10000);
}

return sd;
}

private static String GetCH(int input)
{
String sd = "";
switch (input)
{
case 1:
sd = "一";
break;
case 2:
sd = "二";
break;
case 3:
sd = "三";
break;
case 4:
sd = "四";
break;
case 5:
sd = "五";
break;
case 6:
sd = "六";
break;
case 7:
sd = "七";
break;
case 8:
sd = "八";
break;
case 9:
sd = "九";
break;
default:
break;
}
return sd;
}

public static void main(String[] args) {
Integer aa = 101;
String _number = NumberConventer.ToConvtZH(aa);
System.out.println(_number);
}
}