修改SpringBoot中RedisTemplate默认序列化为Json

背景

最近在使用redis保存对象时发现，对象是被序列化之后存入到redis中的，这样就不能直观的看到对象的属性信息，所以还是希望使用简单的json格式来保存对象到redis中。

那让我们来查看一下SpringBoot中默认的RedisTemplate的实现是什么

/**
 * Helper class that simplifies Redis data access code.
 * 

 * Performs automatic serialization/deserialization between the given objects and the underlying binary data in the
 * Redis store. By default, it uses Java serialization for its objects (through {@link JdkSerializationRedisSerializer}
 * ). For String intensive operations consider the dedicated {@link StringRedisTemplate}.
 * 

 * The central method is execute, supporting Redis access code implementing the {@link RedisCallback} interface. It
 * provides {@link RedisConnection} handling such that neither the {@link RedisCallback} implementation nor the calling
 * code needs to explicitly care about retrieving/closing Redis connections, or handling Connection lifecycle
 * exceptions. For typical single step actions, there are various convenience methods.
 * 

 * Once configured, this class is thread-safe.
 * 

 * Note that while the template is generified, it is up to the serializers/deserializers to properly convert the given
 * Objects to and from binary data.
 * 

 * This is the central class in Redis support.
 *
 * @author Costin Leau
 * @author Christoph Strobl
 * @author Ninad Divadkar
 * @author Anqing Shao
 * @author Mark Paluch
 * @param  the Redis key type against which the template works (usually a String)
 * @param  the Redis value type against which the template works
 * @see StringRedisTemplate
 */
public class RedisTemplate extends RedisAccessor implements RedisOperations, BeanClassLoaderAware {

通过查看源码可知，默认使用的是Java serialization，默认实现类是StringRedisTemplate 

/**
 * String-focused extension of RedisTemplate. Since most operations against Redis are String based, this class provides
 * a dedicated class that minimizes configuration of its more generic {@link RedisTemplate template} especially in terms
 * of serializers.
 * 

 * Note that this template exposes the {@link RedisConnection} used by the {@link RedisCallback} as a
 * {@link StringRedisConnection}.
 *
 * @author Costin Leau
 */
public class StringRedisTemplate extends RedisTemplate {

 那我们的需求是用Json格式保存我们的对象，所以就需要使用SpringBoot中的配置类来修改，配置类代码如下：

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.session.data.redis.config.annotation.web.http.EnableRedisHttpSession;

/**
 * @ClassName: RedisConfig
 * @Description: 修改Redis默认序列化方式
 * @Author: xuezhouyi
 * @Version: V1.0
 **/
@Configuration
@EnableRedisHttpSession(maxInactiveIntervalInSeconds = 3600)
public class RedisConfig {
	@Bean
	public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory) {
		RedisTemplate template = new RedisTemplate<>();
		template.setConnectionFactory(redisConnectionFactory);
		/* 使用Json序列化，默认是JDK序列化 */
		Jackson2JsonRedisSerializer