用springboot实现登录注册功能代码

很高兴回答您的问题！以下是一个用Spring Boot实现登录注册功能的简单代码示例：

// 登录接口
@PostMapping("/login")
public String login(@RequestParam String username, @RequestParam String password) {
    // 根据用户名和密码校验用户信息
    if (username.equals("admin") && password.equals("123456")) {
        return "Login success!";
    } else {
        return "Username or password is incorrect!";
    }
}

// 注册接口
@PostMapping("/register")
public String register(@RequestParam String username, @RequestParam String password) {
    // 根据需求实现用户注册逻辑
    return "Register success!";
}

希望能帮到您！如果您有更多问题，请随时问我。

相关问题

用springboot实现注册登录功能的代码

以下是一个简单的基于 Spring Boot 实现注册登录功能的代码示例：

1. 创建 User 实体类

@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;
    
    // Getter and Setter methods
}

2. 创建 UserRepository 接口

@Repository
public interface UserRepository extends JpaRepository<User, Long> {
    
    User findByUsername(String username);
    
}

3. 创建 UserService 接口和实现类

public interface UserService {
    
    User findByUsername(String username);
    
    User save(User user);
    
}

@Service
public class UserServiceImpl implements UserService {
    
    @Autowired
    private UserRepository userRepository;
    
    @Override
    public User findByUsername(String username) {
        return userRepository.findByUsername(username);
    }
    
    @Override
    public User save(User user) {
        return userRepository.save(user);
    }
    
}

4. 创建 UserController 类

@RestController
@RequestMapping("/api/users")
public class UserController {
    
    @Autowired
    private UserService userService;
    
    @PostMapping("/register")
    public ResponseEntity<?> registerUser(@Valid @RequestBody User user) {
        if (userService.findByUsername(user.getUsername()) != null) {
            return ResponseEntity.badRequest().body("Username is already taken");
        }
        
        user.setPassword(passwordEncoder.encode(user.getPassword()));
        
        userService.save(user);
        
        return ResponseEntity.ok("User registered successfully");
    }
    
    @PostMapping("/login")
    public ResponseEntity<?> authenticateUser(@Valid @RequestBody LoginRequest loginRequest) {
        Authentication authentication = authenticationManager.authenticate(
            new UsernamePasswordAuthenticationToken(loginRequest.getUsername(), loginRequest.getPassword()));
        
        SecurityContextHolder.getContext().setAuthentication(authentication);
        
        String jwt = jwtTokenProvider.generateToken(authentication);
        
        return ResponseEntity.ok(new JwtAuthenticationResponse(jwt));
    }
    
}

5. 创建 LoginRequest 类和 JwtAuthenticationResponse 类

public class LoginRequest {
    
    @NotBlank
    private String username;
    
    @NotBlank
    private String password;
    
    // Getter and Setter methods
}

public class JwtAuthenticationResponse {
    
    private String accessToken;
    
    public JwtAuthenticationResponse(String accessToken) {
        this.accessToken = accessToken;
    }
    
    // Getter and Setter methods
}

6. 创建 JwtTokenProvider 类

@Component
public class JwtTokenProvider {
    
    @Value("${jwt.secret}")
    private String jwtSecret;
    
    @Value("${jwt.expiration}")
    private int jwtExpirationInMs;
    
    public String generateToken(Authentication authentication) {
        UserPrincipal userPrincipal = (UserPrincipal) authentication.getPrincipal();
        
        Date now = new Date();
        Date expiryDate = new Date(now.getTime() + jwtExpirationInMs);
        
        return Jwts.builder()
            .setSubject(Long.toString(userPrincipal.getId()))
            .setIssuedAt(new Date())
            .setExpiration(expiryDate)
            .signWith(SignatureAlgorithm.HS512, jwtSecret)
            .compact();
    }
    
}

7. 配置 Spring Security

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    
    @Autowired
    private JwtAuthenticationEntryPoint unauthorizedHandler;
    
    @Autowired
    private UserDetailsService userDetailsService;
    
    @Autowired
    public void configureAuthentication(AuthenticationManagerBuilder authenticationManagerBuilder) throws Exception {
        authenticationManagerBuilder
            .userDetailsService(userDetailsService)
            .passwordEncoder(passwordEncoder());
    }
    
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
    
    @Bean
    public JwtAuthenticationFilter jwtAuthenticationFilter() {
        return new JwtAuthenticationFilter();
    }
    
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .csrf().disable()
            .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
            .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
            .authorizeRequests()
                .antMatchers("/api/users/**").permitAll()
                .anyRequest().authenticated();
        
        http.addFilterBefore(jwtAuthenticationFilter(), UsernamePasswordAuthenticationFilter.class);
    }
    
}

以上是一个简单的基于 Spring Boot 实现注册登录功能的代码示例，仅供参考。实际项目中可能需要进行更多的优化和改进。

springboot实现登录注册的代码

好的，我可以为您提供一个简单的示例代码来实现Spring Boot中的登录注册功能。首先，您需要创建一个名为“User”的实体类，以便存储用户的信息，包括用户名和密码。这里是一个样例代码：

@Entity
public class User {
 
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
 
    private String username;
    private String password;
 
    // getters and setters
}

然后，您需要创建一个名为“UserController”的控制器类，以处理用户登录注册的请求。这里是一个样例代码：

@RestController
@RequestMapping("/api")
public class UserController {
 
    @Autowired
    private UserService userService;
 
    // 注册用户
    @PostMapping("/register")
    public void registerUser(@RequestBody User user) {
        userService.save(user);
    }
 
    // 用户登录
    @PostMapping("/login")
    public ResponseEntity<?> loginUser(@RequestBody User user) {
        String token = userService.login(user.getUsername(), user.getPassword());
        if(token != null) {
            return ResponseEntity.ok(token);
        } else {
            return ResponseEntity.status(HttpStatus.UNAUTHORIZED).build();
        }
    }
}

在上面的代码中，UserService使用Spring Security来为用户提供登录功能。您需要实现UserService类，并在其中添加一个login()方法来处理用户登录请求。这里是一个示例代码：

@Service
public class UserService {
 
    @Autowired
    private AuthenticationManager authenticationManager;
 
    @Autowired
    private JwtTokenProvider jwtTokenProvider;
 
    @Autowired
    private UserRepository userRepository;
 
    public void save(User user) {
        userRepository.save(user);
    }
 
    public String login(String username, String password) {
        try {
            authenticationManager.authenticate(new UsernamePasswordAuthenticationToken(username, password));
            return jwtTokenProvider.createToken(username, userRepository.findByUsername(username).getRoles());
        } catch (AuthenticationException e) {
            return null;
        }
    }
}

这里使用了JwtTokenProvider类来创建JSON Web Token（JWT），用于在服务器和客户端之间进行身份验证。该类还需要获取用户的角色信息，从而将其添加到JWT中。您需要创建一个名为“JwtTokenProvider”的类，并实现其方法。这里是一个示例代码：

@Component
public class JwtTokenProvider {
 
    @Value("${jwt.secret}")
    private String secretKey;
 
    @Value("${jwt.expiration}")
    private long validityInMilliseconds;
 
    @Autowired
    private UserDetailsService userDetailsService;
 
    @PostConstruct
    protected void init() {
        secretKey = Base64.getEncoder().encodeToString(secretKey.getBytes());
    }
 
    public String createToken(String username, List<Role> roles) {
        Claims claims = Jwts.claims().setSubject(username);
        claims.put("auth", roles.stream().map(s -> new SimpleGrantedAuthority(s.getAuthority()))
                .filter(Objects::nonNull).collect(Collectors.toList()));
 
        Date now = new Date();
        Date validity = new Date(now.getTime() + validityInMilliseconds);
 
        return Jwts.builder().setClaims(claims).setIssuedAt(now).setExpiration(validity)
                .signWith(SignatureAlgorithm.HS256, secretKey).compact();
    }
 
    public Authentication getAuthentication(String token) {
        UserDetails userDetails = this.userDetailsService.loadUserByUsername(getUsername(token));
        return new UsernamePasswordAuthenticationToken(userDetails, "", userDetails.getAuthorities());
    }
 
    public String getUsername(String token) {
        return Jwts.parser().setSigningKey(secretKey).parseClaimsJws(token).getBody().getSubject();
    }
}

最后，您需要创建一个名为“UserRepository”的JPA仓库类，用于与数据库交互。这里是一个示例代码：

@Repository
public interface UserRepository extends JpaRepository<User, Long> {
 
    User findByUsername(String username);
 
}

希望这个示例代码可以帮助到您完成Spring Boot的登录注册功能。如果您有更多的问题，请告诉我，我会尽力回答。