springboot 使用 RedisTemplate

本文主要是介绍springboot 使用 RedisTemplate，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

虽然springboot有提供一些封装好的redis 但有一些复制的情景还是得用RedisTemplate来解决.

首先是redisConfig 注册与实现 复制黏贴

@Component
public class RedisCacheConfig {

    @Bean
    public RedisTemplate<String, ?> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        Jackson2JsonRedisSerializer<?> jackson2JsonRedisSerializer = initFactory();
        RedisTemplate<String, ?> template = new RedisTemplate<>();
        template.setConnectionFactory(redisConnectionFactory);
        template.setKeySerializer(jackson2JsonRedisSerializer);
        template.setValueSerializer(jackson2JsonRedisSerializer);
        template.setHashKeySerializer(jackson2JsonRedisSerializer);
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        template.afterPropertiesSet();
        return template;
    }

    private Jackson2JsonRedisSerializer<Object> initFactory() {
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.activateDefaultTyping(LaissezFaireSubTypeValidator.instance, ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        return jackson2JsonRedisSerializer;
    }

    private Map<String, RedisCacheConfiguration> getRedisCacheConfigurationMap() {
        Map<String, RedisCacheConfiguration> redisCacheConfigurationMap = new HashMap<>(0);
        //1小时有效期
        redisCacheConfigurationMap.put("countPoiInfo", this.getRedisCacheConfigurationWithTtl(60 * 60));
        return redisCacheConfigurationMap;
    }

    private RedisCacheConfiguration getRedisCacheConfigurationWithTtl(Integer seconds) {
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = initFactory();
        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
        redisCacheConfiguration = redisCacheConfiguration
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                .entryTtl(Duration.ofSeconds(seconds));
        return redisCacheConfiguration;
    }

}

在类中使用, 先注入(前面配置类中有注册了这个bean)再使用

@Resource
private RedisTemplate redisTemplate;

举个例子对应@Cacheable的就是hash类型.

    HashOperations<String, String, Object> hashOperations = redisTemplate.opsForHash();

三个泛型对应@Cacheable属性

hash	@Cacheable
第一个String	value
第二个String	key
第三个为Object	缓存的数据

 //获取数据
 Object cacheValue = hashOperations.get(hashKey, key);
 //获取hashKey下所有的键值对
 Set<Map.Entry<String, Integer>> entries = hashOperations.entries(hashKey).entrySet();
 //放入数据
 hashOperations.put(hashKey,key, newValue);
 //删除数据
 hashOperations.delete(hashKey, key);

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