/**

      * set 转换成 map

      * @param set

      * @return

      */

private  Map<String,String> setToMap (Set<String> set) {

Map<String,String>  map = new HashMap<String,String>();

if (set == null) {

return null;

}

Iterator<String> iterator = set.iterator();

while (iterator.hasNext()) {

map.put(UUID.randomUUID().toString(), iterator.next());

}

return map;

}