1.起因🤶🤶🤶🤶

redis搭建完成后，准备启动主程序，异常兴奋，结果报错了！！！！

2.究竟是何原因 😭😭😭😭😭

出现一下错误：

• 1.RedisConnectionFactory is required
• 2.Error creating bean with name 'redisTemplate' defined in class path resource [com/xz/config/RedisConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: RedisConnectionFactory is required
• 3.Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'redisTemplate'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'redisTemplate

源码一探究竟 

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'redisTemplate'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'redisTemplate' defined in class path resource [com/xz/config/RedisConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: RedisConnectionFactory is required
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:713) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:693) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:119) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:408) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1431) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:619) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:955) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:921) ~[spring-context-5.3.30.jar:5.3.30]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.30.jar:5.3.30]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.17.jar:2.7.17]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:732) [spring-boot-2.7.17.jar:2.7.17]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:409) [spring-boot-2.7.17.jar:2.7.17]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) [spring-boot-2.7.17.jar:2.7.17]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1300) [spring-boot-2.7.17.jar:2.7.17]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1289) [spring-boot-2.7.17.jar:2.7.17]
	at com.xz.ProductRuijiApplication.main(ProductRuijiApplication.java:18) [classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'redisTemplate' defined in class path resource [com/xz/config/RedisConfig.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: RedisConnectionFactory is required
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1804) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:620) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1391) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1311) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:710) ~[spring-beans-5.3.30.jar:5.3.30]
	... 20 common frames omitted
Caused by: java.lang.IllegalStateException: RedisConnectionFactory is required
	at org.springframework.util.Assert.state(Assert.java:76) ~[spring-core-5.3.30.jar:5.3.30]
	at org.springframework.data.redis.core.RedisAccessor.afterPropertiesSet(RedisAccessor.java:38) ~[spring-data-redis-2.7.17.jar:2.7.17]
	at org.springframework.data.redis.core.RedisTemplate.afterPropertiesSet(RedisTemplate.java:130) ~[spring-data-redis-2.7.17.jar:2.7.17]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.30.jar:5.3.30]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.30.jar:5.3.30]
	... 30 common frames omitted

3.一顿操作猛如虎 

原本以为自己没有配数据库连接池导致的问题，回去又去添加个连接池~

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
            <version>3.1.2</version>
        </dependency>

jedis:
      pool:
        max-active: 8
        max-wait: 1ms
        max-idle: 4
        min-idle: 0

这时的我还没有意识到严重性！！！！自信的回去跑主程序~结果还是这个问题！！！！

说明什么？？？？说明与连接池无关 ！！！

等等。。。。。之前加入了key序列化配置类，灵机一动，解决了！！！听我娓娓道来~~~

4.so！so！easy嘛 

检查配置类时发现没有设置连接工厂，我真是个可爱~

 redisTemplate.setConnectionFactory(connectionFactory);

至此问题解决！！！！！ 

5.强调一波

已经是粗心导致的第好几次错误了！！！！！！

下次在粗心我就是！！咳咳咳~~~，算了，算了