ssm Redis 缓存首页热门数据

网站首页展示的数据不需要每次向数据库读取

开始前请引入spring redis依赖

配置文件

上面的RedisCacheConfig是用来缓存的，它会按照指定的序列化方式生成key，value。这里采用默认的jdk序列化，，就是想要查数据的时候不方便看，像这样

缓存对象需要实现Serializable接口

RedisCacheConfig

@Configuration
@EnableCaching
public class RedisCacheConfig extends CachingConfigurerSupport {

        private volatile JedisConnectionFactory mJedisConnectionFactory;
        private volatile RedisTemplate mRedisTemplate;
        private volatile RedisCacheManager mRedisCacheManager;

        public RedisCacheConfig() {
            super();
        }

        public RedisCacheConfig(JedisConnectionFactory mJedisConnectionFactory, RedisTemplate mRedisTemplate, RedisCacheManager mRedisCacheManager) {
            super();
            this.mJedisConnectionFactory = mJedisConnectionFactory;
            this.mRedisTemplate = mRedisTemplate;
            this.mRedisCacheManager = mRedisCacheManager;
        }

        public JedisConnectionFactory redisConnectionFactory() {
            return mJedisConnectionFactory;
        }

        public RedisTemplate redisTemplate(RedisConnectionFactory cf) {
            return mRedisTemplate;
        }

        public CacheManager cacheManager(RedisTemplate redisTemplate) {
            return mRedisCacheManager;
        }

        
        
        @Bean
        public KeyGenerator keyGenerator() {
            return new KeyGenerator() {
                public Object generate(Object target, Method method,
                        Object... params) {
                    //规定  本类名+方法名+参数名 为key
                    StringBuilder sb = new StringBuilder();
                    sb.append(target.getClass().getName()+"_");
                    sb.append(method.getName()+"_");
                    for (Object obj : params) {
                        sb.append(obj.toString()+",");
                    }
                    return sb.toString();
                }
            };
        }
        
}

# Redis settings  
redis.host=127.0.0.1
redis.port=6379
#redis.pass=password
redis.dbIndex=0
redis.expiration=3000
redis.maxIdle=300
redis.maxActive=600
redis.maxWait=1000
redis.testOnBorrow=true

数据存好。

创建controller。

service，测试是否起到缓存作用。

访问。

访问成功，第一次访问进入service，

第二次访问，直接读取redis数据库内容