完全な Java テクノロジー スタック ソリューションを構築する

@Entity
@Table(name = "users")
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(nullable = false, unique = true)
    private String username;

    @Column(nullable = false)
    private String password;

    // 省略构造方法、getter和setter方法等
}

@Service
public class UserService {

    @Autowired
    private UserRepository userRepository;

    public User createUser(User user) {
        // 执行创建用户操作
        return userRepository.save(user);
    }

    public User getUserById(Long id) {
        // 执行根据id获取用户操作
        Optional<User> optionalUser = userRepository.findById(id);
        return optionalUser.orElse(null);
    }

    // 省略其他方法...
}

ng new frontend

<table>
  <thead>
    <tr>
      <th>Username</th>
      <th>Password</th>
    </tr>
  </thead>
  <tbody>
    <tr *ngFor="let user of users">
      <td>{{ user.username }}</td>
      <td>{{ user.password }}</td>
    </tr>
  </tbody>
</table>

export class UserListComponent implements OnInit {

  users: User[];

  constructor(private userService: UserService) { }

  ngOnInit() {
    this.userService.getAllUsers()
      .subscribe(users => this.users = users);
  }
}

CREATE TABLE users (
  id INT(11) PRIMARY KEY AUTO_INCREMENT,
  username VARCHAR(50) NOT NULL UNIQUE,
  password VARCHAR(50) NOT NULL
);

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
            .antMatchers("/api/users/**").authenticated()
            .anyRequest().permitAll()
            .and()
            .formLogin().permitAll()
            .and()
            .logout().permitAll();
    }
}

@Service
public class UserDetailsServiceImpl implements UserDetailsService {

    @Autowired
    private UserService userService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = userService.getUserByUsername(username);
        if (user == null) {
            throw new UsernameNotFoundException("User not found");
        }
        return new org.springframework.security.core.userdetails.User(
            user.getUsername(),
            user.getPassword(),
            Collections.emptyList()
        );
    }
}