RedisTemplate 不能按类型装配注入

今天做RedisTemplate的测试，在Spring boot 中自动注入RedisTemplate，测试报错。

@Autowired
private RedisTemplate<Serializable,Serializable> redisTemplate; 

报错：
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type ‘org.springframework.data.redis.core.RedisTemplate<java.io.Serializable, java.io.Serializable>‘ available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

看spring boot文档发现有这么一句：
If you add a @Bean of your own of any of the auto-configured types it will replace the default (except in the case of RedisTemplate the exclusion is based on the bean name ‘redisTemplate’ not its type).

将代码改成:

@Resource 
private RedisTemplate<Serializable,Serializable> redisTemplate; 

测试通过。