an named '*' must be of type [*], but was actually of type [$Proxy16]

在用junit测试dao接口时，出现以下的错误

Caused by: org.springframework.beans.factory.BeanNotOfRequiredTypeException: Bean named 'userDao' must be of type [com.changetech.dao.impl.UserDaoImpl], but was actually of type [$Proxy16]

最后经过仔细检查，错误原因如下：

 

@Resource(name="userDao")

protected UserDaoImpl userDao;

 

public void setUserDao(UserDaoImpl userDao) {

this.userDao = userDao;

}

原来在定义Dao时，没有用接口，而直接使用的是Dao的实现类，改为如下：

 

@Resource(name="userDao")

protected IUserDao userDao;

public void setUserDao(IUserDao userDao) {

this.userDao = userDao;

}

问题得到了解决