org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘his

错误信息：

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'historyService' defined in file [E:\IdeaProjects\starinet\starinet-register\target\classes\com\alibaba\nacos\config\server\service\HistoryService.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'externalHistoryConfigInfoPersistServiceImpl' defined in URL [jar:file:/E:/Maven/MavenLib/io/springboot/nacos/nacos-config/2.2.0.PIGOEM/nacos-config-2.2.0.PIGOEM.jar!/com/alibaba/nacos/config/server/service/repository/extrnal/ExternalHistoryConfigInfoPersistServiceImpl.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.alibaba.nacos.config.server.service.repository.extrnal.ExternalHistoryConfigInfoPersistServiceImpl]: Constructor threw exception; nested exception is java.lang.RuntimeException: java.lang.RuntimeException: [db-load-error]load jdbc.properties error

创建名称为“historyService”的bean时出错:通过构造函数参数0表示不满意的依赖关系;

错误原因：

1. pom.xml中的mybatis版本不匹配
2. 方法名和属性名的对应出了问题
3. 复制别的xml，mapper忘记起namespce
4. 导入了MySQL依赖，但MySQL服务没有启动
5. 注解错地方
6. 连接池配置的有问题

这些错误原因都排查一下，我这里的错误原因是因为Mysql的服务被禁用了，没有启动