but was actually of type 'com.sun.proxy.$Proxy18'

ssm项目中遇到了如下问题：

org.springframework.beans.factory.BeanNotOfRequiredTypeException:
 Bean named 'areaServiceImpl' is expected to be of type 
 'com.imooc.o2o.service.impl.AreaServiceImpl' 
 but was actually of type 'com.sun.proxy.$Proxy18'

看了这篇文章才知道原文章
我在AreaController中：

	@Autowired
	private AreaServiceImpl areaService;

应该改为

	@Autowired
	private AreaService areaService;

这是由于SpringMVC框架所要求的，这里记录下错误。