当前位置：首页 > news >正文

【Java】java | CacheManager | redisCacheManager

news 来源：原创 2025/5/14 13:01:50

一、说明

1、查询增加缓存，使用@Cacheable注解

2、项目中已经用到了ehcache，现在需求是两个都用

二、备份配置

1、redisConfig增加代码

@Bean("redisCacheManage")
    @Primary
    public CacheManager redisCacheManager(RedisConnectionFactory factory) {
        Map<String, RedisCacheConfiguration> configurationMap = MapUtil.newHashMap();
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofMinutes(60))
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(keySerializer()))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(valueSerializer()))
                .disableCachingNullValues();
        return RedisCacheManager.builder(factory)
                .initialCacheNames(configurationMap.keySet())
                .withInitialCacheConfigurations(configurationMap)
                .cacheDefaults(config)
                .build();
    }

    private RedisSerializer<String> keySerializer() {
        return new StringRedisSerializer();
    }

    private RedisSerializer<Object> valueSerializer() {
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer =
                new Jackson2JsonRedisSerializer<>(Object.class);
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);

        // 此项必须配置，否则如果序列化的对象里边还有对象，会报如下错误：
        //     java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to XXX
        objectMapper.activateDefaultTyping(
                objectMapper.getPolymorphicTypeValidator(),
                ObjectMapper.DefaultTyping.NON_FINAL,
                JsonTypeInfo.As.PROPERTY);
        // 旧版写法：
        // objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY);

        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);

        return jackson2JsonRedisSerializer;
    }

2、直接使用

1）缓存
@Cacheable(key ="'method_' + #tenantId + '_' + #bo.toString()", unless = "#result == null", cacheManager = "redisCacheManage", cacheNames = "api")
说明1：cacheNames其实是个前缀，也可以理解成分组的概念；方便手动删除时，根据前缀删除

2）示例截图

3）redis存储结果截图

~~