Spring集成Redis键值乱码\xac\xed\x00\x05t\x00\tb

冷不防 2022-10-27 00:27 12阅读 0赞

> **目录**
> 
> 一、Spring集成Redis键值乱码
> 
> 二、解决方法
> 
> 三、问题分析
> 
> --------------------
> 
> ### 一、Spring集成Redis键值乱码 ###
> 
>     Spring集成Redis设置缓存数据时，发现键值乱码
>     设置的key前面有乱码\xac\xed\x00\x05t\x00\tb
> 
> **发送短信验证码时缓存到redis，Redis Desktop Manage查看发现乱码**
> 
> ![20210202174931327.png][]
> 
> ### 二、解决方法 ###
> 
> **手动定义序列化的方法，spring-data-redis中还提供了一个序列化的类专门针对string类型的序列化org.springframework.data.redis.serializer.StringRedisSerializer这个类，**
> 
> **我们在带有@Configuration注解的类中覆盖自动配置的RedisTemplate<Object,Object>，**
> 
> **如下：添加带有注解@Configuration的RedisConfig配置文件（已优化）**
> 
>     package com.common.redis;
>     
>     import com.fasterxml.jackson.annotation.JsonAutoDetect;
>     import com.fasterxml.jackson.annotation.PropertyAccessor;
>     import com.fasterxml.jackson.databind.ObjectMapper;
>     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.data.redis.serializer.StringRedisSerializer;
>     
>     /**
>      * @author libusi
>      */
>     @Configuration
>     public class RedisConfig {
>     
>         @Bean
>         public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
>             RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
>             // 设置redis连接
>             redisTemplate.setConnectionFactory(redisConnectionFactory);
>             // 使用Jackson2JsonRedisSerialize 替换默认序列化
>             Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);
>             ObjectMapper objectMapper = new ObjectMapper();
>             objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
>             objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
>             jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
>     
>             // 设置value的序列化规则和 key的序列化规则
>             redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
>             redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
>             // 将redisTemplate的序列化方式更改为StringRedisSerializer
>             redisTemplate.setHashKeySerializer(new StringRedisSerializer());
>             redisTemplate.setKeySerializer(new StringRedisSerializer());
>             redisTemplate.afterPropertiesSet();
>             return redisTemplate;
>         }
>     
>     }
> 
> **Spring mvc项目则可以在xml中指定：**
> 
>     <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"
>     		p:connection-factory-ref="jedisConnectionFactory">
>     		<property name="keySerializer">
>     			<bean class="org.springframework.data.redis.serializer.StringRedisSerializer" />
>     		</property>
>     		<property name="valueSerializer">
>     			<bean class="org.springframework.data.redis.serializer.StringRedisSerializer" />
>     		</property>
>     		<property name="hashKeySerializer">
>     			<bean class="org.springframework.data.redis.serializer.StringRedisSerializer" />
>     		</property>
>     		<property name="hashValueSerializer">
>     			<bean class="org.springframework.data.redis.serializer.StringRedisSerializer" />
>     		</property>
>     	</bean>
> 
> ### **三、问题分析** ###
> 
>     public class RedisTemplate<K, V> extends RedisAccessor implements RedisOperations<K, V>, BeanClassLoaderAware {
>     
>     	private boolean enableTransactionSupport = false;
>     	private boolean exposeConnection = false;
>     	private boolean initialized = false;
>     	private boolean enableDefaultSerializer = true;
>     	private @Nullable RedisSerializer<?> defaultSerializer;
>     	private @Nullable ClassLoader classLoader;
>     
>     	...
>     
>     	/*
>     	 * (non-Javadoc)
>     	 * @see org.springframework.data.redis.core.RedisAccessor#afterPropertiesSet()
>     	 */
>     	@Override
>     	public void afterPropertiesSet() {
>     
>     		super.afterPropertiesSet();
>     
>     		boolean defaultUsed = false;
>     
>     		if (defaultSerializer == null) {
>     
>     			defaultSerializer = new JdkSerializationRedisSerializer(
>     					classLoader != null ? classLoader : this.getClass().getClassLoader());
>     		}
> 
> **因为spring操作redis是在jedis客户端基础上进行的，而jedis客户端与redis交互的时候协议中定义是用byte类型交互，**
> 
> **jedis中提供了string类型转为byte\[\]类型，但是看到spring-data-redis中RedisTemplate<K, V>在操作的时候k，v是泛型的，**
> 
> **所以RedisTemplate中有了上面那段代码，在没有特殊定义的情况下，spring默认采用defaultSerializer = new JdkSerializationRedisSerializer()，**
> 
> **来对key，value进行序列化操作，在经过查看JdkSerializationRedisSerializer中对序列化的一系列操作，发现如下代码：**
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpYnVzaTAwMQ_size_16_color_FFFFFF_t_70][]
> 
> **序列化支持的是Object对象，调用了SerializingConverter类下的convert方法转换对象，**
> 
> ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpYnVzaTAwMQ_size_16_color_FFFFFF_t_70 1][]
> 
> **解决的办法就是手动定义序列化的方法，**
> 
> **spring-data-redis中还提供了一个序列化的类专门针对string类型的序列化org.springframework.data.redis.serializer.StringRedisSerializer这个类，**
> 
> **我们在带有@Configuration注解的类中覆盖自动配置的RedisTemplate<Object,Object>**
> 
> ![20210203093739890.png][]
> 
> 参考[https://blog.csdn.net/wwrzyy/article/details/85089463][https_blog.csdn.net_wwrzyy_article_details_85089463]
> 
> RedisConfig代码优化
> 
> **有用请点赞，养成良好习惯！**
> 
> **补充、交流请留言！**
> 
>

[20210202174931327.png]: /images/20221024/39d919e866684f3a9b8d03a536dde5a4.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpYnVzaTAwMQ_size_16_color_FFFFFF_t_70]: /images/20221024/e314a45035eb44f383b9664db85a7ddc.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpYnVzaTAwMQ_size_16_color_FFFFFF_t_70 1]: /images/20221024/39fee86bcc1946548ca7aefb6b2ddb8a.png
[20210203093739890.png]: /images/20221024/fadeaac5030840c1a3c4938e9736cafb.png
[https_blog.csdn.net_wwrzyy_article_details_85089463]: https://blog.csdn.net/wwrzyy/article/details/85089463