Java Spring Security+；AngularJS：个性化'；UsernameNotFoundException'；消息

我制作了一个AngularJs+Spring安全应用程序，我想个性化“UsernameNotFoundException”消息

我走了那么远

我的Spring安全代码：

@Override
    @Transactional
    public UserDetails loadUserByUsername(final String login) {
        log.debug("Authenticating {}", login);
        String lowercaseLogin = login.toLowerCase();
        Optional<User> userFromDatabase = userRepository.findOneByEmail(lowercaseLogin);
        return userFromDatabase.map(
                user -> {
                        List<GrantedAuthority> grantedAuthorities = user.getAuthorities().stream()
                                .map(authority -> new SimpleGrantedAuthority(authority.getName()))
                                .collect(Collectors.toList());
                        return new org.springframework.security.core.userdetails.User(lowercaseLogin, user
                                .getPassword(), grantedAuthorities);
                }).orElseThrow(
                () -> new UsernameNotFoundException("User " + lowercaseLogin + " was not found in the database"));
    }

我的控制器：

$scope.login = function (event,validForm) {
              Auth.login({
                  username: $scope.username,
                  password: $scope.password,
              }).then(function success(data) {
              [...]
              }, function error(data) {
                console.log(data);              
              });

当抛出异常时，我在console.log上看到：

Object {data: Object, status: 400, config: Object, statusText: "Bad Request"}
config: Object
data: Object
headers: (name)
status: 400
statusText: "Bad Request"
__proto__: Object

---

但是我找不到消息。有什么想法吗？

您希望看到什么样的行为？我想获取异常消息（“数据库中找不到用户“+小写字母+”），以区分异常。

Object {data: Object, status: 400, config: Object, statusText: "Bad Request"}
config: Object
data: Object
headers: (name)
status: 400
statusText: "Bad Request"
__proto__: Object