Description:

The bean 'studentMapper' could not be injected because it is a JDK dynamic proxy

The bean is of type 'com.sun.proxy.$Proxy250' and implements:
    com.xinwei.learning.mapper.StudentMapper

Expected a bean of type 'com.xinwei.learning.manager.education.mapper.TeachingClassStudentMapper' which implements:
    com.xinwei.common.db.mapper.BaseMapperX

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.
 

报错原因：

是因为我们用了注解@Resource 注入接口或者映射文件，然后多个地方注入后的别名不一致，就会出现这个问题。

解决办法：

1. 每个注入接口或者映射文件的地方，统一取同一个别名，如下：

classStudentMapper

    @Resource
    private TeachingClassStudentMapper classStudentMapper;

2.或者运用@Autowired注解注入即可，每个类注入后的别名可以不一样

    @Autowired
    private TeachingClassStudentMapper classStudentMapper;