/**
  * ½ØÈ¡Ò»¸ö×Ö·û´®ÖпªÍ·µ½Ö¸¶¨³¤¶ÈµÄ×Ö·û´®
  *
  * @param full ÍêÕûµÄ×Ö·û´®
  * @param end ÐÂ×Ö·û´®µÄ³¤¶È
  * @return
  */
 public static String cutString(String full, int end, String endStr) {
   try {
     if (end >= full.length()) {
       return full;
     } else {
       return full.substring(0, end) + endStr;
     }
   } catch (IndexOutOfBoundsException e) {
     e.printStackTrace();
     return null;
   }
 }