@RequestMapping(value = "/insertUser", method = RequestMethod.POST)

 public ResultT insertUser(@RequestBody Map<String,List<User>> map){

     List<User> userList = map.get("insertUserList");

 }

 //前台json格式

 {

     "insertUserList": [

         {

             "firstName": "Brett",

             "lastName": "McLaughlin",

             "email": "aaaa"

         },

         {

             "firstName": "Jason",

             "lastName": "Hunter",

             "email": "bbbb"

         },

         {

             "firstName": "Elliotte",

             "lastName": "Harold",

             "email": "cccc"

         }

     ]

 }