自定义RedisTemplate序列化机制
在项目中引入Redis依赖后，SpringBoot提供的RedisAutoConfiguration自动配置会生效。打开RedisAutoConfiguration类，查看内部源码中关于RedisTemplate的定义方式
```java
public class RedisAutoConfiguration {
@Bean
@ConditionalOnMissingBean(
name = {"redisTemplate"}
)
public RedisTemplate<Object, Object>redisTemplate(RedisConnectionFactory
redisConnectionFactory) throws UnknownHostException {
RedisTemplate<Object, Object> template = new RedisTemplate();
template.setConnectionFactory(redisConnectionFactory);
return template;
}
...
}
```
从上述RedisAutoConfiguration核心源码中可以看出，在Redis自动配置类中，通过Redis连接工厂RedisConnectionFactory初始化了一个RedisTemplate；该类上方添加了@ConditionalOnMissingBean注解（顾名思义，当某个Bean不存在时生效），用来表明如果开发者自定义了一个名为redisTemplate的Bean，则该默认初始化的RedisTemplate不会生效。
如果想要使用自定义序列化方式的RedisTemplate进行数据缓存操作，可以参考上述核心代码创建一个名为redisTemplate的Bean组件，并在该组件中设置对应的序列化方式即可
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