rest方法无法获取正确的数据

我有一个基本的SpringBoot应用程序。使用spring初始化器、jpa、嵌入式tomcat、thymeleaf模板引擎,并将其打包为一个可执行的jar文件。我定义了这个rest方法来更新用户

@PutMapping(path = "/api/users/{id}", 
                        consumes = "application/json", 
                        produces = "application/json")
    public ResponseEntity<User> updateUser
                                    (HttpServletRequest request, 
                                    @PathVariable long id,
                                    User user) {

        System.out.println(user);
        saveUser (user)
        return ResponseEntity.ok(user);

    }

我从控制台调用此方法,使用

curl -X PUT -H "Content-Type: application/json" -H "Authorization: Bearer eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiJyaWNhcmQub2xsZUBnbWFpbC5jb20iLCJleHAiOjE1MjgxMTM3NTIsImlhdCI6MTUyNzUwODk1Mn0.QdxabtU1U87pYvyTstT1EG3E6uVpLo2mXCF0FF8iD6acKoAXKl_A0-eV_GrpOFg5FF1qR6B7llI5_USJL85YTQ" -d '{
\"id\":1,\"username\":\"pere.peris@gmail.com\",\"email\":\"pere.peris@gmail.com\",\"firstName\":\"Pere\",\"lastName\":\"PERIS\",\"country\":\"CAT\",\"enabled\":true}' "http://127.0.0.1:2233/iCrypts/api/users/1"

但是在 System.out.println(user); 我从pojo得到的所有值都是空的(!?),但是 id 那是1