yihu/src/main/java/org/example/config/RedisConfig.java

package org.example.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.JsonTypeInfo;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.jsontype.impl.LaissezFaireSubTypeValidator;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.time.Duration;

/**
 * Redis配置类
 */
@Configuration
@EnableCaching
public class RedisConfig {

    /**
     * 配置RedisTemplate
     */
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(connectionFactory);

        // 使用StringRedisSerializer来序列化和反序列化redis的key值
        StringRedisSerializer stringSerializer = new StringRedisSerializer();
        template.setKeySerializer(stringSerializer);
        template.setHashKeySerializer(stringSerializer);

        // 使用GenericJackson2JsonRedisSerializer来序列化和反序列化redis的value值
        GenericJackson2JsonRedisSerializer jsonSerializer = new GenericJackson2JsonRedisSerializer();
        template.setValueSerializer(jsonSerializer);
        template.setHashValueSerializer(jsonSerializer);

        template.afterPropertiesSet();
        return template;
    }

    /**
     * 配置缓存管理器
     */
    @Bean
    public CacheManager cacheManager(RedisConnectionFactory connectionFactory) {
        // 配置序列化
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                // 设置缓存过期时间为30分钟
                .entryTtl(Duration.ofMinutes(30))
                // 设置key的序列化方式
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
                // 设置value的序列化方式
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()))
                // 不缓存null值
                .disableCachingNullValues();

        return RedisCacheManager.builder(connectionFactory)
                .cacheDefaults(config)
                .build();
    }
}