Spring Boot UnsatisfiedDependencyException: Error Creating Bean with Name 'userController' - 解决方法

This error is thrown when a bean dependency cannot be resolved during the application startup. \n\nIn this specific case, the error is occurring in the 'userController' bean. The 'userController' bean has a dependency on the 'userService' bean, which in turn has a dependency on the 'userMapper' bean. \n\nThe error message indicates that the 'userMapper' bean creation failed because the 'sqlSessionFactory' or 'sqlSessionTemplate' property is required but not provided. \n\nTo resolve this issue, you need to ensure that the 'sqlSessionFactory' or 'sqlSessionTemplate' dependency is properly configured for the 'userMapper' bean. \n\nYou can do this by either configuring the 'userMapper' bean with a 'sqlSessionFactory' bean or a 'sqlSessionTemplate' bean. \n\nMake sure that the configuration is correct and that the necessary dependencies are provided.