字元串與ascII碼互相轉化

//字元串轉ASCII
	public static String stringToAscii(String value)
	 {
	  StringBuffer sbu = new StringBuffer();
	  char[] chars = value.toCharArray();
	  for (int i = 0; i < chars.length; i++) {
	   if(i != chars.length - 1)
	   {
	    sbu.append((int)chars[i]).append(",");
	   }
	   else {
	    sbu.append((int)chars[i]);
	   }
	  }
	  return sbu.toString();
	 }
	//ASCII轉字元串
	public static String asciiToString(String value)
	 {
		if(value == null || "".equals(value))
			return "";
		else{
		  StringBuffer sbu = new StringBuffer();
		  String[] chars = value.split(",");
		  for (int i = 0; i < chars.length; i++) {
		   sbu.append((char) Integer.parseInt(chars[i]));
		  }
		  return sbu.toString();
		}
	 }