Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: com/po/IdCard

报错内容：

Unsatisfied dependency expressed through field ‘personDao’; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘personDao’ defined in file [C:Usershuanshaoworkspacech7bincomdaoPersonDao.class]: Cannot resolve reference to bean ‘sqlSessionFactory’ while setting bean property ‘sqlSessionFactory’; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘sqlSessionFactory’ defined in class path resource

[applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: com/po/IdCard (wrong name: com/po/Idcard)

原因：

可能是变量名这种小错误！！比如看下图：
持久层文件

映射文件

解决办法：

将映射文件resultType值：IdCard改为Idcard

最后

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