function checkForm() {
        var oUser = document.getElementById(‘user‘);
        var oPswd = document.getElementById(‘pwd‘);
        if(remember.checked) {
                setCookie(‘user‘, oUser.value, 90); //保存帐号到cookie，有效期7天
                setCookie(‘pwd‘, oPswd.value, 90); //保存密码到cookie，有效期7天
                
            }
    $.ajax({
        url: "/loginauth/login",
        type: "post",
        dataType: "json",
        /*指定ajax和servlet之间数据交互的格式*/
        data: {
            userName: oUser.value,
            password: oPswd.value,
            ip:queryIp()
        },
        async: true,
        success: function(result) {
            if (result.code==100){
                var token=result.token
                document.cookie=token;
                window.location.href = "/index?token="+token;
            }
        }
    });
        //************************
        
    }

@RequestMapping("/loginauth/login")
    @ResponseBody
    public Map<String,Object> loginAuth(String userName, String password){
        Map<String,Object> result=new HashMap<>();
       if ("admin".equals(userName)&&"123".equals(password)){
           result.put("code","100");
           result.put("token",userName+""+password);
           result.put("message","登录成功");
           return  result;
       }
        result.put("code","-100");
        result.put("message","登录失败");
        return  result;

    }

@RequestMapping("/home")
    @ResponseBody
   public Map<String,Object> home(@RequestHeader Map<String,String> headers,HttpServletRequest request ){
        headers.forEach((key,value)->{
            //logger.info(key+","+value);
        });
        String token=request.getHeader("access-token");
        logger.info("token:{}",token);
        Map<String,Object> map=new HashMap<>();
        if (StringUtils.isEmpty(token)){
            map.put("code","-100");
            map.put("message","token获取失败");
        }
        map.put("code","100");
        map.put("message","token获取成功,token="+token);
        return map;
   }

<div class="container">
        <h1><span th:text="${nickname}"></span>,欢迎登陆系统!</h1>
        <button class="btn btn-success" id="add" >添加</button>
        <a class="btn btn-default" href="/login" role="button">退出</a>
    </div>
    </body>
     <script>
         $(function(){
             $("#add").click(function(){
                 var token = document.cookie.split(";")[0];
                 $.ajax({
                     type:"get",
                     url:"/home",
                     dataType:"json",
                     headers:{
                         ‘access-token‘:token
                     },
                     success:function (data) {
                        alert("data.message="+data.message);
                     }
                 })
             });

         });

     </script>