学习spring框架时遇到一个问题。
记录一个错误：

 摘出最主要的提示：

Error creating bean with name 'sqlSessionFactory' defined in class path resource [application-config.xml]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: com/yiwensi/wuye/mapper/paymentMapper (wrong name: com/yiwensi/wuye/mapper/PaymentMapper)

主要问题Error creating bean with name 'sqlSessionFactory' defined in class path resource [applicationContext.xml]: Invocation of init method failed;在创建bean时，调用初始化方法失败。从而引出后面集中嵌套的错误。
定位到最终代码Cannot find class: org.example.domain.Student不能够找到这个文件。下面是文件路径
 

报错原因：mapper接口名字和mapper,xml 名字没对上导致的错误