使用redis限制spring boot中的会话

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

spring.redis.host=127.0.0.1
spring.redis.port=6379
spring.redis.password=your_password

@Configuration
public class RedisConfig {

    @Value("${spring.redis.host}")
    private String host;

    @Value("${spring.redis.port}")
    private int port;

    @Value("${spring.redis.password}")
    private String password;

    @Bean
    public JedisConnectionFactory jedisConnectionFactory() {
        RedisStandaloneConfiguration config = new RedisStandaloneConfiguration(host, port);
        config.setPassword(RedisPassword.of(password));
        return new JedisConnectionFactory(config);
    }

    @Bean
    public RedisTemplate<String, Object> redisTemplate() {
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(jedisConnectionFactory());
        return template;
    }
}

@Component
public class SessionListener implements HttpSessionListener {

    private static final String SESSION_COUNT_KEY = "session:count";

    @Autowired
    private RedisTemplate<String, Object> redisTemplate;

    @Override
    public void sessionCreated(HttpSessionEvent se) {
        redisTemplate.opsForValue().increment(SESSION_COUNT_KEY);
    }

    @Override
    public void sessionDestroyed(HttpSessionEvent se) {
        redisTemplate.opsForValue().decrement(SESSION_COUNT_KEY);
    }
}

@Autowired
private RedisTemplate<String, Object> redisTemplate;

public boolean isSessionLimitReached() {
    Long sessionCount = (Long) redisTemplate.opsForValue().get("session:count");
    return sessionCount != null && sessionCount >= 100; // 假设限制为100个会话
}