引入依賴

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

        <!-- spring2.X整合redis所需common-pool2-->
        <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-pool2</artifactId>
        <version>2.6.0</version>
        </dependency>
 

編寫Redis的配置類

/**
*@EnableCaching: 開啟快取
**/
@EnableCaching
@Configuration
public class RedisConfig extends CachingConfigurerSupport {
    @Bean
    public RedisTemplate<String, Object> redisTemplate(
            RedisConnectionFactory factory) {
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new
                Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        //om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        om.activateDefaultTyping(om.getPolymorphicTypeValidator(),ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setConnectionFactory(factory);
        //key序列化方式
        template.setKeySerializer(redisSerializer);
        //value序列化
        template.setValueSerializer(jackson2JsonRedisSerializer);
        //value hashmap序列化
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        return template;
    }

    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory) {
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new
                Jackson2JsonRedisSerializer(Object.class);
        //解決查詢快取轉換異常的問題
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        // 配置序列化（解決亂碼的問題）,過期時間600秒
        RedisCacheConfiguration config =
                RedisCacheConfiguration.defaultCacheConfig()
                        .entryTtl(Duration.ofSeconds(600)).
                        serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer)).

                        serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                        .disableCachingNullValues();
        RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
                .cacheDefaults(config)
                .build();
        return cacheManager;
    }
}

 

SpringBoot快取註解詳解

• @Cacheable

根據方法對其返回結果進行快取，下次請求時，如果快取存在，則直接讀取快取資料返回；如果快取不
存在，則執行方法，並把返回的結果存入快取中。一般用在查詢方法上。

• 快取@CachePut

使用該註解標誌的方法，每次都會執行，並將結果存入指定的快取中。其他方法可以直接從響應的快取
中讀取快取資料，而不需要再去查詢資料庫。一般用在新增方法上。

• 快取@CacheEvict

使用該註解標誌的方法，會清空指定的快取。一般用在更新或者刪除方法上
檢視原始碼，屬性值如下：