Spring Security+Redis实现登录

要使用Spring Security和Redis实现登录功能，你需要做以下几步：

1. 配置Spring Security，使其能够处理登录请求。
2. 实现UserDetailsService来加载用户详情。
3. 使用Redis作为缓存，存储用户的认证信息。

以下是一个简化的示例：

1. 添加依赖（pom.xml）

<!-- Spring Security -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>
<!-- Spring Data Redis -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!-- Redis 客户端 -->
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
</dependency>

2. 配置Spring Security (SecurityConfig.java)

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
 
    @Autowired
    private UserDetailsService userDetailsService;
 
    @Autowired
    private RedisTemplate<String, String> redisTemplate;
 
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService);
    }
 
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
 
    // 其他配置...
}

3. 实现UserDetailsService (CustomUserDetailsService.java)

@Service
public class CustomUserDetailsService implements UserDetailsService {
 
    @Autowired
    private RedisTemplate<String, String> redisTemplate;
 
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        // 从数据库或其他存储加载用户详情
        // ...
 
        // 假设已经获取用户信息
        String password = "encryptedPassword"; // 从数据库获取的密码
        boolean enabled = true;
        boolean accountNonExpired = true;
        boolean credentialsNonExpired = true;
        boolean accountNonLocked = true;
 
        UserDetails userDetails = new User(username, password, enabled, accountNonExpired, credentialsNonExpired, accountNonLocked, getAuthorities(username));
 
        // 将用户详情存储到Redis
        redisTemplate.opsForValue().set(username, JsonUtils.objectToJson(userDetails));
 
        return userDetails;
    }
 
    private Collection<? extends GrantedAuthority> getAuthorities(String username) {
        // 获取用户的权限
        // ...
        return AuthorityUtils.createAuthorityList("ROLE_USER");
    }
}

4. 创建登录接口 (LoginController.java)