springboot实现退出登录的功能完整代码

以下是Spring Boot实现退出登录功能的完整代码：

1. 创建一个名为SecurityConfig的类，用于配置Spring Security。

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
 
    @Autowired
    private UserDetailsService userDetailsService;
 
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
            .antMatchers("/login").permitAll()
            .antMatchers("/logout").permitAll()
            .antMatchers("/home").hasAnyRole("ADMIN", "USER")
            .anyRequest().authenticated()
            .and().formLogin().loginPage("/login").defaultSuccessUrl("/home")
            .and().logout().logoutUrl("/logout").logoutSuccessUrl("/login");
    }
 
    @Autowired
    public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService);
    }
}

2. 创建一个名为UserDetailsServiceImpl的类，实现UserDetailsService接口，用于从数据库中获取用户信息。

@Service
public class UserDetailsServiceImpl implements UserDetailsService {
 
    @Autowired
    private UserRepository userRepository;
 
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        User user = userRepository.findByUsername(username);
        if (user == null) {
            throw new UsernameNotFoundException("User not found");
        }
        return new org.springframework.security.core.userdetails.User(user.getUsername(), user.getPassword(), getAuthorities(user));
    }
 
    private List<GrantedAuthority> getAuthorities(User user) {
        List<GrantedAuthority> authorities = new ArrayList<>();
        for (Role role : user.getRoles()) {
            authorities.add(new SimpleGrantedAuthority(role.getName()));
        }
        return authorities;
    }
}

3. 创建一个名为UserRepository的接口，继承JpaRepository接口，用于从数据库中获取用户信息。

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

4. 创建一个名为UserController的类，用于处理登录和退出登录的请求。

@Controller
public class UserController {
 
    @GetMapping("/login")
    public String login() {
        return "login";
    }
 
    @GetMapping("/logout")
    public String logout(HttpServletRequest request, HttpServletResponse response) {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if (authentication != null) {
            new SecurityContextLogoutHandler().logout(request, response, authentication);
        }
        return "redirect:/login?logout";
    }
 
    @GetMapping("/home")
    public String home() {
        return "home";
    }
}

5. 创建一个名为User的类，用于表示用户信息。

@Entity
@Table(name = "user")
public class User implements Serializable {
 
    private static final long serialVersionUID = 1L;
 
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
 
    @Column(name = "username")
    private String username;
 
    @Column(name = "password")
    private String password;
 
    @ManyToMany(fetch = FetchType.EAGER)
    @JoinTable(name = "user_role", joinColumns = @JoinColumn(name = "user_id"), inverseJoinColumns = @JoinColumn(name = "role_id"))
    private List<Role> roles;
 
    // getters and setters
}

6. 创建一个名为Role的类，用于表示角色信息。

@Entity
@Table(name = "role")
public class Role implements Serializable {
 
    private static final long serialVersionUID = 1L;
 
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;
 
    @Column(name = "name")
    private String name;
 
    @ManyToMany(mappedBy = "roles")
    private List<User> users;
 
    // getters and setters
}

7. 创建一个名为SpringBootSecurityApplication的类，用于启动Spring Boot应用程序。

@SpringBootApplication
public class SpringBootSecurityApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(SpringBootSecurityApplication.class, args);
    }
}

以上就是Spring Boot实现退出登录功能的完整代码。