将数字转换成中文数字

将阿拉伯数字转换成中文数字，大家可以看我的测试数据，应该没有BUG。

/**
 * 将数字转换成中文数字
 * @author Prosper
 *
 */
public class IntToCN
{

	public static void main(String[] args)
	{
		
		int ri = ((Double)(Math.random()*10)).intValue();
		System.out.println(ri+" : "+intToZH(ri));
		
		ri = ((Double)(Math.random()*100)).intValue();
		System.out.println(ri+" : "+intToZH(ri));
		
		ri = ((Double)(Math.random()*1000)).intValue();
		System.out.println(ri+" : "+intToZH(ri));
		
		ri = ((Double)(Math.random()*10000)).intValue();
		System.out.println(ri+" : "+intToZH(ri));
		
		ri = ((Double)(Math.random()*100000)).intValue();
		System.out.println(ri+" : "+intToZH(ri));
		
		ri = ((Double)(Math.random()*1000000)).intValue();
		System.out.println(ri+" : "+intToZH(ri));
		
		ri = ((Double)(Math.random()*10000000)).intValue();
		System.out.println(ri+" : "+intToZH(ri));
		
		ri = ((Double)(Math.random()*100000000)).intValue();
		System.out.println(ri+" : "+intToZH(ri));
		
		ri = ((Double)(Math.random()*1000000000)).intValue();
		System.out.println(ri+" : "+intToZH(ri));
		
		ri = ((Double)(Math.random()*10000000000l)).intValue();
		System.out.println(ri+" : "+intToZH(ri));
	}
	
	/**
	 * 将数字转换成中文数字
	 * @author Prosper
	 *
	 */
	public static String intToZH(int i)
	{

        String[] zh = {"零", "一", "二", "三", "四", "五", "六", "七", "八", "九"};  
        String[] unit = {"", "十", "百", "千", "万", "十", "百", "千", "亿", "十"};  
        
		String str = "";
		StringBuffer sb = new StringBuffer(String.valueOf(i));
		sb = sb.reverse();
		int r = 0;
		int l = 0;
		for (int j = 0; j < sb.length(); j++)
		{
			/**
			 * 当前数字
			 */
			r = Integer.valueOf(sb.substring(j, j+1));
			
			if (j != 0)
				/**
				 * 上一个数字
				 */
				l = Integer.valueOf(sb.substring(j-1, j));
			
			if (j == 0)
			{
				if (r != 0 || sb.length() == 1)
					str = zh[r];
				continue;
			}
			
			if (j == 1 || j == 2 || j == 3 || j == 5 || j == 6 || j == 7 || j == 9)
			{
				if (r != 0)
					str = zh[r] + unit[j] + str;
				else if (l != 0)
					str = zh[r] + str;
				continue;
			}
			
			if (j == 4 || j == 8)
			{
				str =  unit[j] + str;
				if ((l != 0 && r == 0) || r != 0)
					str = zh[r] + str;
				continue;
			}
		}
		return str;
	}
}