运行springboot项目时报错： Description: The bean ‘userServiceImpl‘ could not be injected as a

运行springboot项目时报错：

   Description:

   The bean 'userServiceImpl' could not be injected as a 'com.tang.service.UserServiceImpl' because it is a JDK dynamic proxy that implements:
   	com.tang.service.UserService


   Action:

   Consider injecting the bean as one of its interfaces or forcing the use of CGLib-based proxies by setting proxyTargetClass=true on @EnableAsync and/or @EnableCaching.

  在controller中注入service时，要用接口注入。

@Autowired
UserService userService;  //要用接口
// 而不是 UserServiceImpl userService

道可道，非常道；名可名，非常名。
无名，天地之始，有名，万物之母。
故常无欲，以观其妙，常有欲，以观其徼。
此两者，同出而异名，同谓之玄，玄之又玄，众妙之门。