Struts has detected an unhandled exception: Messages: Bean named_could not instantiate bean class [com.itheima.elec-优快云博客

本文链接：https://blog.youkuaiyun.com/u011723841/article/details/10298971

本文解析了一种常见的Spring框架依赖注入异常，即Bean类型不匹配的问题，并提供了具体的解决方法。通常这种错误发生在Bean的实际类型与期望类型不符时，文中通过实例说明如何定位问题并修复。

Struts has detected an unhandled exception:
Messages: Bean named 'cn.itcast.elec.dao.impl.ElecApplicationTemplateDaoImpl' must be of type [cn.itcast.elec.service.IElecApplicationTemplateService], but was actually of type [cn.itcast.elec.dao.impl.ElecApplicationTemplateDaoImpl]
Error creating bean with name 'elecApplicationFlowAction'Injection of resource dependencies failed; nested exception is org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'cn.itcast.elec.dao.impl.ElecApplicationTemplateDaoImpl' must be of type [cn.itcast.elec.service.IElecApplicationTemplateService], but was actually of type [cn.itcast.elec.dao.impl.ElecApplicationTemplateDaoImpl]
Unable to instantiate Action, elecApplicationFlowAction, defined for 'elecApplicationFlowAction_home' in namespace '/workflow'Error creating bean with name 'elecApplicationFlowAction'Injection of resource dependencies failed; nested exception is

org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'cn.itcast.elec.dao.impl.ElecApplicationTemplateDaoImpl' must be of type [cn.itcast.elec.service.IElecApplicationTemplateService], but was actually of type [cn.itcast.elec.dao.impl.ElecApplicationTemplateDaoImpl]

在用已有的模板复制一个类似的类时，如：serviceImpl层 ElecApplicationTemplateServiceImpl.java 复制一份ElecApplicationFlowServiceImpl.java
原来ElecApplicationTemplateServiceImpl.java 类中的一些import的资源也被复制到ElecApplicationFlowServiceImpl.java中（这些资源在此类中还没有用到），运行时就会出现以上错误，将多余的import资源删除，再重新启动服务就ok了！