public JSONArray selectSysUrlTree(List<Sys> sysList) {
   JSONArray tree = new JSONArray();
   for (Sys sys : sysList) {
     Sys tmp = new Sys();
     tmp.setId(sys.getId());
     tmp.setDefUrl(sys.getDefUrl());
     tmp.setSysChName(sys.getSysChName());
     tmp.setIndexStr(sys.getIndexStr());
     this.selectSysUrlTree(tree, tmp, true);
   }
   return tree;
 }