Question

我正在使用Spring启动并拥有以下Restful Controller。它的工作正常，我用PostMan进行了测试。

@RestController
public class AuthController {

@Autowired
private UserRepository userRepository;  

@PostMapping("/login")
public User login(@RequestBody User user) {
    User currentUser = userRepository.findOneByUserIdAndPassword(user.getUserId(), user.getPassword());
    System.out.println("currentUser : "+currentUser);
    return (currentUser == null ? new User() : currentUser);
}
}

Angular 5 Credentials对象：

export class Credentials {

userId: string;
password: string;

constructor(userId: string, password: string) {
    this.userId = userId;
    this.password = password;
}
}

Angular 5组件：login.component.ts

login(): void {

   //Looking to do something like this.
   User user = this.authService.login(this.credentials);
   if(user.userId === '') {
     this.isLoggedIn = false;
   } else {
     this.isLoggedIn = false;
   }
}

Angular 5服务：auth.service.ts

尝试使用此功能。

login(credentials : Credentials): Promise<User> {
return this.http
  .post(API_URL + '/login', JSON.stringify(credentials), httpOptions)
  .toPromise()
  .then(() => User)
  .catch(this.handleError);

  }

但我在通话中收到此错误。呼叫也没有到达服务器。

core.js:1448 ERROR Error: Uncaught (in promise): Object: {"body":{"error":"Collection 'undefined' not found"},"url":"http://localhost:8080/login","headers":{"normalizedNames":{},"lazyUpdate":null},"status":404,"statusText":"Not Found"}
    at resolvePromise (zone.js:809)
    at resolvePromise (zone.js:775)

我也尝试使用但无法接听电话。

login(credentials : Credentials): Observable<Credentials> {
    return this.http.post<Credentials>(API_URL + '/login', credentials, httpOptions);
}

欣赏任何指示。

Answer 1

您的最新尝试看起来很严重，但您需要订阅您的登录功能，如果您不这样做，则永远不会触发该呼叫。在订阅功能中，您可以使用该服务提供的凭据。有关详细信息，请参阅https://angular.io/guide/http。

this.authService.login(this.credentials).subscribe((user) => {
   if(user.userId === '') {
     this.isLoggedIn = false;
   } else {
     // probably a copy+paste issue to set it to false?
     this.isLoggedIn = false;
   }
}

Angular 5调用Spring Restful Controller

1 个答案: