String rs="[ { "name": "UserName", "displayName": "Username"},{ "name": "WeeksSinceRegistration", "displayName": "Weeks Since Registration" }]";
A JSONObject text must begin with '{' at character 1 of [ame of the这是报错息
JSONObject obj = JSONObject.fromObject(rs);
List> map = (List>) JSONObject.toBean(obj, List.class);