如何创建登录和注册表单并在 Java 和前端 js 中为其后端创建测试？

Posted 2023-02-25

【中文标题】如何创建登录和注册表单并在 Java 和前端 js 中为其后端创建测试？

【英文标题】：how to create sign-in and sign-up form & create a test for it backend in Java and frontend js?

【发布时间】：2022-01-24 04:00:27

【问题描述】：

我想学，怎么做一个有这个功能的项目。 （登录和注册） 这些是我目前上过的课程。

这是我也有用户类的实体

@Entity(name = "Users")
public class UserEntity 

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id" ,nullable = false)
    private int id;

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

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

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

    protected UserEntity() 

    

    public UserEntity( String firstname, String lastname, String email) 

        this.firstname = firstname;
        this.lastname = lastname;
        this.email = email;


    

这是方法所在的服务类

@Service
public class UserService 
    private final UserRepository usersRepository;

    public UserService(UserRepository usersRepository) 
        this.usersRepository = usersRepository;
    


    public List<User> findAll ()
        List<UserEntity> users = usersRepository.findAll();
        return users.stream().map(this::entityToUser).collect(Collectors.toList());
    


    public User findUserbyId(int id)
        var userentity = usersRepository.findById(id);
        return userentity.map(this::entityToUser).orElse(null);
    

    public User update(int id , UserCreateRequest request)
        var userEntityOptional = usersRepository.findById(id);
        if(userEntityOptional.isEmpty())
            return null;
        
       var userEntity = userEntityOptional.get();
        userEntity.setFirstname(request.getFirstname());
        userEntity.setLastname(request.getLastname());
        userEntity.setEmail(request.getEmail());
        usersRepository.save(userEntity);

        return entityToUser(userEntity);
    

    public boolean deleteById(int id)
        if (!usersRepository.existsById(id))
            return false;
        
        usersRepository.existsById(id);
        return true;
    

    public User create(UserCreateRequest request)
         var userEntity = new UserEntity(request.getFirstname(),request.getLastname(),request.getEmail());
         userEntity = usersRepository.save(userEntity);
        return entityToUser(userEntity);

    



    public User entityToUser(UserEntity userEntity)
      return new User (
                userEntity.getId(),
                userEntity.getFirstname(),
                userEntity.getLastname(),
                userEntity.getEmail());

    

这里是用户控制器

@RestController
public class UserRestController 

    private final UserService userService;

    public UserRestController(UserService userService) 
        this.userService = userService;
    
    @GetMapping(path = "/api/v1/users")
    public ResponseEntity<List<User>> fetchUsers() 
        return ResponseEntity.ok(userService.findAll()) ;

我想知道我需要什么才能以最佳方式正确使用此功能 有哪些必要的步骤？

【问题讨论】：

在进行改进之前，首先找出您在使用这种方法时面临的问题，一旦您发现您将清楚地知道您需要在哪一侧进行改进 从给定的代码中我可以建议您可以使用 @Autowired 功能而不是将其设置为构造函数

【参考方案1】：

@Service
public class UserService 
     //make this Autowired
    @Autowired
    private  UserRepository usersRepository;

    


    public List<User> findAll ()
        List<UserEntity> users = usersRepository.findAll();
        return users.stream().map(this::entityToUser).collect(Collectors.toList());
    


    public User findUserbyId(int id)
        var userentity = usersRepository.findById(id);
        return userentity.map(this::entityToUser).orElse(null);
    

    public User update(int id , UserCreateRequest request)
        var userEntityOptional = usersRepository.findById(id);
        if(userEntityOptional.isEmpty())
            return null;
        
       var userEntity = userEntityOptional.get();
        userEntity.setFirstname(request.getFirstname());
        userEntity.setLastname(request.getLastname());
        userEntity.setEmail(request.getEmail());
        usersRepository.save(userEntity);

        return entityToUser(userEntity);
    

    public boolean deleteById(int id)
        if (!usersRepository.existsById(id))
            return false;
        
        usersRepository.existsById(id);
        return true;
    

    public User create(UserCreateRequest request)
         var userEntity = new UserEntity(request.getFirstname(),request.getLastname(),request.getEmail());
         userEntity = usersRepository.save(userEntity);
        return entityToUser(userEntity);

    



    public User entityToUser(UserEntity userEntity)
      return new User (
                userEntity.getId(),
                userEntity.getFirstname(),
                userEntity.getLastname(),
                userEntity.getEmail());

    

这里是用户控制器

@RestController
public class UserRestController 
   //make this Autowired
    @Autowired
    private UserService userService;

    
    @GetMapping(path = "/api/v1/users")
    public ResponseEntity<List<User>> fetchUsers() 
        return ResponseEntity.ok(userService.findAll()) ;

点击此处了解更多关于@Autowired https://www.baeldung.com/spring-autowire