判断用户名是否为中文

	private static boolean checkUserNameOfChina(String username){
		  boolean bool = false;   
		  for(int   i   =0   ;i   <   username.length()   ;   i   ++)   
		  {   
		     if(username.substring(i,   i+1).matches("[\\u4e00-\\u9fa5]+")){
		    	 bool = true;
		    	 break;
		     } 
		  } 
		  return bool; 
	}