/**
  * 查询字符串转换成Map<br>
  * name1=key1&name2=key2&...
  *
  * @param queryString
  * @return
  */
 @SuppressWarnings("unchecked")
 public static Map queryString2Map(String queryString) {
   if (null == queryString || "".equals(queryString)) {
     return null;
   }
   Map m = new HashMap();
   String[] strArray = queryString.split("&");
   for (int index = 0; index < strArray.length; index++) {
     String pair = strArray[index];
     HttpClientUtil.putMapByPair(pair, m);
   }
   return m;
 }