springboot 2.4.5 redis 配置类+缓存

package com.anquan.Configeration;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.jsontype.impl.LaissezFaireSubTypeValidator;
import org.springframework.cache.annotation.CachingConfigurerSupport;
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.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.time.Duration;

@Configuration
@EnableCaching
public class RedisConfiger extends CachingConfigurerSupport {

    @Bean
    public RedisConnectionFactory redisConnectionFactory(){
　　　　/**添加对应依赖 JedisConnectionFactory,LettLettuceConnectionFactory

     *RedisConnectionFactory工厂又两种方式创建类 :
　　　*　JedisConnectionFactory()
　　　*　LettLettuceConnectionFactory　
　　　*/

return new JedisConnectionFactory();

    }
    /**
     * 实例化RedisTemplate类
     */
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        //大多数情况，都是选用<String, Object>
        RedisTemplate<String, Object> template = new RedisTemplate<>();

        template.setConnectionFactory(redisConnectionFactory);

        // 使用JSON的序列化对象，对数据key和value进行序列化转换
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(Object.class);
        //ObjectMapper是Jackson的一个工作类，顾名思义他的作用是将JSON映射到Java对象即反序列化，或将Java对象映射到JSON即序列化
        ObjectMapper mapper = new ObjectMapper();
        // 设置序列化时的可见性，第一个参数是选择序列化哪些属性，比如时序列化setter?还是filed?h第二个参数是选择哪些修饰符权限的属性来序列化，比如private或者public，这里的any是指对所有权限修饰的属性都可见(可序列化)
        mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        // 设置出现故障即错误的类型，第一个是指验证程序，此时的参数为无需验证，其他参数可以查看源码了解(作者还在啃源码中)，第二是指该类不能为final修饰，否则将会报错
        mapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance, ObjectMapper.DefaultTyping.NON_FINAL);
       jackson2JsonRedisSerializer.setObjectMapper(mapper);
        // 设置RedisTemplate模板的序列化方式为jacksonSeial
        template.setDefaultSerializer(jackson2JsonRedisSerializer);
        return template;
    }
    /**
     * 自定义缓存管理器
     * @param redisConnectionFactory
     * @return
     */
    @Bean
    public RedisCacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
        // 创建String和JSON序列化对象，分别对key和value的数据进行类型转换
        RedisSerializer<String> strSerializer = new StringRedisSerializer();

        Jackson2JsonRedisSerializer jacksonSeial = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper mapper = new ObjectMapper();
        mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        mapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance, ObjectMapper.DefaultTyping.NON_FINAL);
        jacksonSeial.setObjectMapper(mapper);
        // 自定义缓存数据序列化方式和有效期限
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofDays(1))   // 设置缓存有效期为1天
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(strSerializer)) // 使用strSerializer对key进行数据类型转换
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jacksonSeial)) // 使用jacksonSeial对value的数据类型进行转换
                .disableCachingNullValues();   // 对空数据不操作

        RedisCacheManager cacheManager = RedisCacheManager.builder(redisConnectionFactory).cacheDefaults(config).build();
        return cacheManager;
    }
}