easyUI排序 查询后台代码

下列代码为easyUI查询列表下的排序（查询后台代码）

/*前台代码*/$("#searchList").datagrid({    fit:true,    singleSelect:true,    columns:[    //sortable:标示排序，sortName:标示要排序的列，sortOrder:标示正序OR倒序    {field:'time',title:'时间',sortable:true,sortName:'time',sortOrder:'asc'},    {field:'sort',title:'顺序',sortable:true,sortName:'sort',sortOrder:'asc'}    ]});/*后台代码*/public Object test(HttpServletRequest re){    String sortName = re.getParameter("sort");//前台排序字段    String sortOrder = re.getParameter("order");//desc OR asc    JSONObject json = new JSONObject();    List<Map<String,String>> list = new ArrayList<Map<String,String>>();    //list赋值    Map<String,String> map = new HashMap<String,String>();    map.put("time","2016-01-12 10:30:25");    map.put("sort",1);    list.add(map);    Map<String,String> map1 = new HashMap<String,String>();    map1.put("time","2016-01-11 10:30:25");    map1.put("sort",2);    list.add(map1);    Collection.sort(list,new Comparator<Map<String,String>>(){        @Override        public int compare(Map<String,String>m,Map<String,String>m1){            if("time".equals(sortName)){                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");                Date d = new Date();                Date d1 = new Date();                d = sdf.parse(m.get("time").toString());                d1 = sdf.parse(m1.get("time").toString());                if("asc".equals(sortOrder))                    return d.compareTo(d1);                else                    return d1.compareTo(d);            }else if("sort".equals(sortName)){                if("asc".equals(sortOrder))                    return (Integer.parse(m.get("sort").toString()).compareTo(Integer.parse(m1.get("sort").toString()));                else                    return (Integer.parse(m1.get("sort").toString()).compareTo(Integer.parse(m.get("sort").toString()));            }else return -1;        }     });     json.put("list",list);     return json.toString();}