User findUserById(Long id);

public UserDTO findOne(Long id){
    User user = userRepository.findUserById(id);
    return userMapper.userToUserDTO(user);
}

@GetMapping("/user/:{id}")
@Timed
public ResponseEntity<UserDTO> getUser(@PathVariable Long id){
    log.debug("REST request to get User : {}", id);
    UserDTO userDTO = userService.findOne(id);
    return ResponseUtil.wrapOrNotFound(Optional.ofNullable(userDTO));
}

vm.getUser=getUser;

    getUser();
    function getUser(){
        $http({method:'GET', url: 'http://localhost:8080/api/user/'+vm.review.userId}).
            then(function(response){
                $scope.status = response.status;
                vm.user = user;
        }, function(response){
            $scope.status = response.status;
            vm.user = user;
        });
    }