SpringBoot2.x使用Redis缓存，更给默认序列话机制。

SpringBoot2.x默认的序列化机制是jdk，以下是转换过程。

package com.gnl.springbootcache.config;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.gnl.springbootcache.entites.Employee;
import org.springframework.boot.autoconfigure.cache.CacheProperties;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.ResourceLoader;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.cache.RedisCacheWriter;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.lang.reflect.Method;
import java.net.UnknownHostException;
import java.time.Duration;
import java.util.LinkedHashSet;
import java.util.List;

@Configuration
public class MyRedisConfig  {

 @Bean
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Employee.class);
        RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofSeconds(100))  // 设置缓存有效期100s
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer));
        return RedisCacheManager
                .builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory))
                .cacheDefaults(redisCacheConfiguration).build();
    }


    /*@Bean
    public KeyGenerator keyGenerator() {
           return  new KeyGenerator(){
               @Override
               public Object generate(Object o, Method method, Object... objects) {
                   StringBuilder sb = new StringBuilder();
                   sb.append(o.getClass().getName());
                   sb.append(method.getName());
                   for(Object obj : objects){
                       sb.append(obj.toString());
                   }
                   System.out.println(sb.toString()+"  key");
                   return sb.toString();
               }
           };
    }*/


    /* @Bean
    public RedisTemplate empRedisTemplate(
            RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {
        RedisTemplate template = new RedisTemplate<>();
        template.setConnectionFactory(redisConnectionFactory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Employee.class);
        template.setDefaultSerializer(jackson2JsonRedisSerializer);
        return template;
    }*/

   /* @Bean(name = "cacheManager")
    @Primary
    public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
        RedisCacheConfiguration cacheConfiguration = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofSeconds(10)) //设置过期时间
                .disableCachingNullValues()   //禁止缓存null对象
               *//* .computePrefixWith(cacheName -> "yourAppName".concat(":").concat(cacheName).concat(":"))*//* //此处定义了cache key的前缀，避免公司不同项目之间的key名称冲突
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer())) //定义了key和value的序列化协议，同时hash key和hash value也被定义
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new Jackson2JsonRedisSerializer<>(Employee.class)));

        return RedisCacheManager.builder(redisConnectionFactory)
                .cacheDefaults(cacheConfiguration)
                .build();
    }*/

   



}

贴图示意