RedisCacheManager设置Value序列化器技巧

最新推荐文章于 2025-06-10 10:50:41 发布

胡峻峥

最新推荐文章于 2025-06-10 10:50:41 发布

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分类专栏： spring redis springboot 文章标签： redis cache manager springboot

本文链接：https://blog.youkuaiyun.com/qq_22845447/article/details/84941054

CacheManager基本配置

　　请参考博文：springboot2.0 redis EnableCaching的配置和使用

RedisCacheManager构造函数

/**
 * Construct a {@link RedisCacheManager}.
 * 
 * @param redisOperations
 */
@SuppressWarnings("rawtypes")
public RedisCacheManager(RedisOperations redisOperations) {
    this(redisOperations, Collections.<String> emptyList());
}

/**
 * Construct a static {@link RedisCacheManager}, managing caches for the specified cache names only.
 * 
 * @param redisOperations
 * @param cacheNames
 * @since 1.2
 */
@SuppressWarnings("rawtypes")
public RedisCacheManager(RedisOperations redisOperations, Collection<String> cacheNames) {
    this.redisOperations = redisOperations;
    setCacheNames(cacheNames);
}

　　RedisCacheManager需要一个 RedisOperations实例，一般是RedisTemplate。还有一个不必须的缓存名称集合参数。

protected RedisCache createCache(String cacheName) {
    long expiration = computeExpiration(cacheName);
    return new RedisCache(cacheName, (usePrefix ? cachePrefix.prefix(cacheName) : null), redisOperations, expiration);
}

　　在创建缓存时，通过RedisCache的构造函数传入 redisOperations（即RedisTemplate实例）。

设置全局通用的序列化器

　　GenericJackson2JsonRedisSerializer

import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;

GenericJackson2JsonRedisSerializer serializer = new GenericJackson2JsonRedisSerializer();
User user = new User();
user.setName("hjzgg");
user.setAge(26);

System.out.println(serializer.deserialize(serializer.serialize(user)));


public static class User {
    private String name;
    private Integer age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return Objects.toStringHelper(this)
                .add("name", name)
                .add("age", age)
                .toString();
    }
}

　　调试发现，序列化内容加入了对象的类型信息，如下。

　　查看GenericJackson2JsonRedisSerializer构造函数，序列化和反序列化的实现是通过Jackson的ObjectMapper完成的。并开启了默认类型的配置。

/**
 * Creates {@link GenericJackson2JsonRedisSerializer} and configures {@link ObjectMapper} for default typing using the
 * given {@literal name}. In case of an {@literal empty} or {@literal null} String the default
 * {@link JsonTypeInfo.Id#CLASS} will be used.
 * 
 * @param classPropertyTypeName Name of the JSON property holding type information. Can be {@literal null}.
 */
public GenericJackson2JsonRedisSerializer(String classPropertyTypeName) {

    this(new ObjectMapper());

    if (StringUtils.hasText(classPropertyTypeName)) {
        mapper.enableDefaultTypingAsProperty(DefaultTyping.NON_FINAL, classPropertyTypeName);
    } else {