继承的父类的request属性为啥用不了？

痛定思痛。 2021-10-06 13:42 218阅读 0赞

#### **基本的Action类，实现了ServletRequestAware,ServletResponseAware 接口，并重写了相对应的方法。** ####

package cn.it.elec.web.action;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.apache.struts2.interceptor.ServletRequestAware;
    import org.apache.struts2.interceptor.ServletResponseAware;
    
    import com.opensymphony.xwork2.ActionSupport;
    
    @SuppressWarnings("serial")
    public class BaseAction extends ActionSupport implements ServletRequestAware, ServletResponseAware { 
    
        @SuppressWarnings("unused")
        private HttpServletRequest request = null;
        @SuppressWarnings("unused")
        private HttpServletResponse response = null;
    
        @Override
        public void setServletResponse(HttpServletResponse reponse) {
            this.response = response;
        }
    
        @Override
        public void setServletRequest(HttpServletRequest request) {
            this.request = request;
        }
    
    }

--------------------

#### **ElecCommonMsgAction 继承了 BaseAction 类,这样的话，就是可以直接使用request的。但是，直接写request会显示错误。** ####

![这里写图片描述][20150803141517247]

package cn.it.elec.web.action;
    
    import java.util.List;
    
    import javax.servlet.http.HttpServletRequest;
    
    import cn.itcast.elec.container.ServiceProvider;
    import cn.itcast.elec.service.IElecCommonMsgService;
    import cn.itcast.elec.web.form.ElecCommonMsgForm;
    
    import com.opensymphony.xwork2.ModelDriven;
    
    @SuppressWarnings("serial")
    public class ElecCommonMsgAction extends BaseAction implements ModelDriven<ElecCommonMsgForm> { 
    
        private ElecCommonMsgForm elecCommonMsgForm = new ElecCommonMsgForm();
        private IElecCommonMsgService elecCommonMsgService = (IElecCommonMsgService) ServiceProvider.getService(IElecCommonMsgService.SERVICE_NAME);
    
        @Override
        public ElecCommonMsgForm getModel() {
            return elecCommonMsgForm;
        }
    
        /** * @Name:home * @Description : 查询待办事宜列表 * @author qbz * @version :V1.0.0(版本号) * @Create Date ：2015-08-03 * @Parameters: 无 * @return:String home 跳转到actingIndex.jsp */
        public String home(){
            List<ElecCommonMsgForm> list = elecCommonMsgService.findElecCommonMsgList();
            request.setAttribute("commonList", list);
            return "home";
        }
    }

--------------------

#### **原来是：粗心大意惹的祸！在父类BaseAction中的request 是private 的，所以，它的子类仍然不能使用这个属性！把BaseAction中的request、response 的属性 改为protected即可。** ####

[20150803141517247]: /images/20211006/40061796fd8141409fa226bca8732f63.png