Bean named '*' must be of type [*],

Bean 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