masalah saat memposting data menggunakan spring dan AngularJS :: Permintaan yang dikirim oleh klien salah secara sintaksis

Saya mendapatkan kesalahan di bawah ini saat POSTING ke layanan lainnya. Tolong bantu saya memahami apa yang saya lewatkan di sini?

The request sent by the client was syntactically incorrect.

Kode Pengontrol saya adalah:

@RequestMapping(method = RequestMethod.POST)
public @ResponseBody String addUser(@RequestBody UserDomain userDomain, BindingResult result) {
    System.out.println("UserDomain :: " + userDomain);
    userService.addUser(userDomain);
    return "redirect:/";
}

Layanan.js

services.factory('UserFactory', ['$resource', function ($resource) {

return  {
    usercreation: $resource('/ngdemo/web/users', {}, {
        query: {method: 'GET', isArray: true },
        create: {method: 'POST'}
    })

}; }]);

Pengendali.js

    app.controller('DemoCtrl', ['$scope', 'UserFactory', '$facebook', 'NotificationFactory', '$location', function ($scope, UserFactory, $facebook, NotificationFactory, $location) {

        $scope.UserDomain = { firstname: null };

        $scope.isLoggedIn = false;
        $scope.login = function () {
            $facebook.login().then(function () {
                refresh();
            });
        }

        function refresh() {
            $facebook.api("/me").then(
                function (response, Userfactory) {
                    $scope.welcomeMsg = "Welcome " + response.name;
                    $scope.result = response;
                    console.log("console ctrl demo12 - " + $scope.welcomeMsg);
                    alert($scope.result);
                    $scope.isLoggedIn = true;

                    //$scope.UserDomain.id = $scope.result.id;
                    $scope.UserDomain.socialId = $scope.result.id;
                    $scope.UserDomain.gender = $scope.result.gender;
                    $scope.UserDomain.firstname = $scope.result.first_name;
                    $scope.UserDomain.hometown = $scope.result.hometown.name;
                    $scope.UserDomain.currentLocation = $scope.result.location.name;
                    $scope.UserDomain.lastname = $scope.result.last_name;
                    $scope.UserDomain.email = $scope.result.email;
                    $scope.UserDomain.username = $scope.result.username;
                    $scope.UserDomain.link = $scope.result.link;
                    $scope.UserDomain.relationshipStatus = $scope.result.relationship_status;

                    console.log("$scope.result - " + $scope.result.relationship_status);
                    console.log("$scope.UserDomain - " + $scope.UserDomain.relationshipStatus);

                    //making call to add user
                    UserFactory.usercreation.create($scope.UserDomain);
                },
                function (err) {
                    $scope.welcomeMsg = "Please log in";
                });
        }
    }]);

JSON dibentuk dan diperiksa di konsol mozilla ::

{"firstname":"Naveuuuin","socialId":"7048797897728972","gender":"male","hometown":"Udaipur, Rajasthan","currentLocation":"Bangalore, India","lastname":"Vyas","email":"[email protected]","username":"vyas","link":"https://www.facebook.com/vyas","relationshipStatus":"Single"}

Kelas UserDomain adalah:

    package ngdemo.domain;

    import javax.persistence.*;

    @Entity
    @Table(name = "P_USER")
    public class UserDomain {

        @Id
        @Column(name = "USER_ID")
        @GeneratedValue
        private Integer id;

        @Column(name = "SOCIAL_ID")
        private String socialId;

        @Column(name = "FIRSTNAME")
        private String firstname;

        @Column(name = "LASTNAME")
        private String lastname;

        @Column(name = "EMAIL")
        private String email;

       /* @Column(name = "PHONENUMBER")
        private String telephone;*/

        @Column(name = "HOMETOWN")
        private String homeTown;

        @Column(name = "GENDER")
        private String gender;

        @Column(name = "LINK")
        private String link;

        @Column(name = "CURRENT_LOCATION")
        private String currentLocation;

        @Column(name = "RELATIONSHIP_STATUS")
        private String relationshipStatus;

        @Column(name = "USERNAME")
        private String username;

        public String getSocialId() {
            return socialId;
        }

        public void setSocialId(String socialId) {
            this.socialId = socialId;
        }

        public String getCurrentLocation() {
            return currentLocation;
        }

        public void setCurrentLocation(String currentLocation) {
            this.currentLocation = currentLocation;
        }

        public String getGender() {
            return gender;
        }

        public void setGender(String gender) {
            this.gender = gender;
        }

        public String getHomeTown() {
            return homeTown;
        }

        public void setHomeTown(String homeTown) {
            this.homeTown = homeTown;
        }

        public String getLink() {
            return link;
        }

        public void setLink(String link) {
            this.link = link;
        }

        public String getRelationshipStatus() {
            return relationshipStatus;
        }

        public void setRelationshipStatus(String relationshipStatus) {
            this.relationshipStatus = relationshipStatus;
        }

        public String getUsername() {
            return username;
        }

        public void setUsername(String username) {
            this.username = username;
        }

        public String getEmail() {
            return email;
        }

       /* public String getTelephone() {
            return telephone;
        }*/

        public void setEmail(String email) {
            this.email = email;
        }

       /* public void setTelephone(String telephone) {
            this.telephone = telephone;
        }*/

        public String getFirstname() {
            return firstname;
        }

        public String getLastname() {
            return lastname;
        }

        public void setFirstname(String firstname) {
            this.firstname = firstname;
        }

        public void setLastname(String lastname) {
            this.lastname = lastname;
        }

        public Integer getId() {
            return id;
        }

        public void setId(Integer id) {
            this.id = id;
        }

        @Override
        public String toString() {
            return "UserDomain{" +
                    "currentLocation='" + currentLocation + '\'' +
                    ", id=" + id +
                    ", socialId=" + socialId +
                    ", firstname='" + firstname + '\'' +
                    ", lastname='" + lastname + '\'' +
                    ", email='" + email + '\'' +
                    ", homeTown='" + homeTown + '\'' +
                    ", gender='" + gender + '\'' +
                    ", link='" + link + '\'' +
                    ", relationshipStatus='" + relationshipStatus + '\'' +
                    ", username='" + username + '\'' +
                    '}';
        }
    }