使用Spring属性注入的方式，没有在ServiceImpl中setDao，导致程序报错
public class AddressServiceImpl implements IAddressService {
private IAddressDAO addressDAO;
public void setAddressDAO(IAddressDAO addressDAO) {
this.addressDAO = addressDAO;
super.dao = addressDAO;
}
error: Bean property 'userDAO' is not writable or has an invalid setter method.
原文：https://www.cnblogs.com/gqymy/p/10677053.html
