springboot+redis实现登录

Spring Boot结合Redis实现登录功能通常涉及以下几个步骤：

1. **添加依赖**：
在`pom.xml`中添加Spring Data Redis和Spring Security的依赖：

   <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-data-redis</artifactId>
   </dependency>
   <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-security</artifactId>
   </dependency>

2. **配置Redis**：
在`application.properties`中设置Redis连接信息：

   spring.redis.host=localhost
   spring.redis.port=6379

3. **配置Security**：
创建`SecurityConfig`类，重写WebSecurityConfigurerAdapter，配置Redis作为用户认证存储：

   @Configuration
  @EnableWebSecurity
   public class SecurityConfig extends WebSecurityConfigurerAdapter {
       @Autowired
       private UserDetailsService userDetailsService;
       @Value("${spring.redis.authKey}")
       private String authKey;

       @Override
       protected void configure(HttpSecurity http) throws Exception {
           http.authorizeRequests()
               .antMatchers("/").permitAll()
               .anyRequest().authenticated()
               .and()
               .formLogin()
                   .loginPage("/login")
                   .permitAll()
                   .defaultSuccessUrl("/")
                   .failureHandler(new CustomAuthenticationFailureHandler())
               .and()
               .logout()
                   .permitAll();
       }

       @Bean
       public AuthenticationManager authenticationManager() throws Exception {
           RedisAuthenticationProvider provider = new RedisAuthenticationProvider();
           provider.setConnectionFactory(connectionFactory());
           provider.setUserDetailsMapper(userDetailsService);
           return provider;
       }

       @Bean
       public RedisTemplate<String, Object> redisTemplate() {
           RedisTemplate<String, Object> template = new RedisTemplate<>();
           JedisConnectionFactory factory = new JedisConnectionFactory();
           factory.setHostName(authKey);
           //...其他属性配置
           template.setConnectionFactory(factory);
           template.afterPropertiesSet();
           return template;
       }
   }

4. **用户服务** (`UserDetailsService`实现）：
从Redis中读取用户的加密密码并验证：

   @Service
   public class UserService implements UserDetailsService {
       private final JdbcTemplate jdbcTemplate;

       @Autowired
       public UserService(JdbcTemplate jdbcTemplate) {
           this.jdbcTemplate = jdbcTemplate;
       }

       @Override
       public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
           //从Redis获取用户信息，比如通过username和hash存储
           Map<String, Object> userDetails = jedis.get(username);
           if (userDetails == null) throw new UsernameNotFoundException("Invalid username");
           //解码密码并进一步处理...
       }
   }

5. **登录和注销**：
使用Spring Security提供的表单登录功能，用户输入用户名和密码后会自动进行验证。