Bean named ‘userService‘ is expected to be of type ‘com.zkf.service.userServiecImpl‘ but[我的报错日常]
报错：
原因：getBean方法 第二个参数应该写的是接口，而不是它的实现类
（动态代理的是接口【记住使用框架都要用接口类型来引用实现类对象】）
代理类与被代理类都是UserService接口的实现类
新生成的代理类只能向上转型为接口类型，不能强转给同等级UserServiceImpl
说个多态的简单的例子
Animal的子类有Cat类、Dog类
你不能将Cat类强转成Dog类，只能将Cat类向上转成Animal类
解决方法：将userServiecImpl.class–>userServiec.class
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