背景
最近在使用redis保存對象時發現，對象是被序列化之後存入到redis中的，這樣就不能直觀的看到對象的屬性信息，所以還是希望使用簡單的json格式來保存對象到redis中。
那讓我們來查看一下SpringBoot中默認的RedisTemplate的實現是什麼
/**
* Helper class that simplifies Redis data access code.
* <p/>
* 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}.
* <p/>
* 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.
* <p/>
* Once configured, this class is thread-safe.
* <p/>
* 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.
* <p/>
* <b>This is the central class in Redis support</b>.
*
* @author Costin Leau
* @author Christoph Strobl
* @author Ninad Divadkar
* @author Anqing Shao
* @author Mark Paluch
* @param <K> the Redis key type against which the template works (usually a String)
* @param <V> the Redis value type against which the template works
* @see StringRedisTemplate
*/
public class RedisTemplate<K, V> extends RedisAccessor implements RedisOperations<K, V>, BeanClassLoaderAware {
通過查看源碼可知，默認使用的是Java serialization，默認實現類是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.
* <p/>
* 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<String, String> {
那我們的需求是用Json格式保存我們的對象，所以就需要使用SpringBoot中的配置類來修改，配置類代碼如下：
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默認序列化方式
* @Author: xuezhouyi
* @Version: V1.0
**/
@Configuration
@EnableRedisHttpSession(maxInactiveIntervalInSeconds = 3600)
public class RedisConfig {
@Bean
public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
RedisTemplate<Object, Object> template = new RedisTemplate<>();
template.setConnectionFactory(redisConnectionFactory);
/* 使用Json序列化，默認是JDK序列化 */
Jackson2JsonRedisSerializer<Object> serializer = new Jackson2JsonRedisSerializer<>(Object.class);
template.setDefaultSerializer(serializer);
return template;
}
}