nested exception is redis.clients.jedis.exceptions.JedisConnectionExcep 解决方法

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'OrdersIteamController' defined in file [C:\Users\Administrator\Desktop\book\web\target\classes\com\siner\web\OrdersIteamController.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.siner.web.OrdersIteamController]: Constructor threw exception; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1320) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1214) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:557) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]

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如图，我使用Jedis抓不到连接池里的jedis链接，也就是说连接池中没有可用的jedis。
产生这种问题原因我大概发现了2种：

1、properties文件里jedis的配置有问题，要么是写错了，要么是没设置好端口
2、你没有打开redis 服务器，就是那个CMD小黑框。


搞好后，启动IDEA，芜湖 起飞，完美启动