将javascript响应变量传递给spring控制器函数

以下javascript代码与出现的facebook登录窗口一起使用,并允许用户登录.捕获响应值,我知道它可以在设置中出现警报,但我无法将值传递回控制器方法.

 @RequestMapping(value ="/getAccessToken" , method = RequestMethod.POST)
 public @ResponseBody String getAccessToken(@RequestBody String token){

     System.out.println(token);

     return token;
  } 

Javascript方法调用:

    function doLogin() {
        FB.login(function(response) {
        alert(response);
        console.log(response);
        if (response.authResponse) {
                    alert(response.authResponse.userID);
                    alert(response.authResponse.accessToken);
                    var Token = response.authResponse.accessToken;
                    alert(Token);
                    $.ajax({
                        type: "POST",
                        url: "/HelloController/getAccessToken",
                        data: Token,
                        success: function (result) {
                              alert("Token");
                        },
                        error: function (result) {
                              alert("oops");
                        }
                    });
                     document.getElementById('loginBtn').style.
         display = 'none';
         getUserData();
        }}, {perms:'manage_pages', 
       scope: 'email,public_profile', return_scopes: true});
     };

我得到的错误如下:

WARN 25660 --- [nio-8080-exec-9] 
o.s.web.servlet.PageNotFound             : 
Request method 'POST' not supported

感谢回应.