Struts Action 里面根据访问的action参数值 执行对应方法

Question

以前没这么用过请问是如何实现比如 art.do?action=showList  转到action方法便执行对应的 showList 方法     art.do?action=showArtCont 转到action方法便执行对应的 showArtCont 方法

Answer 1

继承DispatchAction,我写的一个例子
package mytra.controller;
import java.io.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import org.apache.struts.upload.FormFile;
import org.apache.struts.actions.DispatchAction;
import mytra.bo.*;
import mytra.domain.ReguBean;
import java.util.List;public class ReguAction extends DispatchAction {    public ActionForward insertRegu(ActionMapping mapping,
                                 ActionForm actionForm,
                                 HttpServletRequest servletRequest,
                                 HttpServletResponse servletResponse) throws IOException {
       ReguDao op = (ReguDao)DaoConfig.getDaoManager().getDao(ReguDao.class);
       UploadSaver us = new UploadSaver();
       String dir = getServlet().getServletContext().getRealPath("/images");
       ReguBean regu = (ReguBean) actionForm;
       FormFile ff = regu.getPicture();
       if(ff!=null) {
           us.saveFile(ff,dir);
           regu.setPicname(us.getPicname());
       }
       op.insertRegu(regu);
       return mapping.findForward("success");
    }    public ActionForward updateRegu(ActionMapping mapping,
                                 ActionForm actionForm,
                                 HttpServletRequest servletRequest,
                                 HttpServletResponse servletResponse) {
       ReguDao op = (ReguDao)DaoConfig.getDaoManager().getDao(ReguDao.class);
       ReguBean regu = (ReguBean) actionForm;
       op.updateRegu(regu);
       return mapping.findForward("success");
    }    public ActionForward deleteRegu(ActionMapping mapping,
                                 ActionForm actionForm,
                                 HttpServletRequest servletRequest,
                                 HttpServletResponse servletResponse) {
       ReguDao op = (ReguDao)DaoConfig.getDaoManager().getDao(ReguDao.class);
       ReguBean regu = (ReguBean) actionForm;
       int id = regu.getRegId();
       op.deleteRegu(id);
       return mapping.findForward("success");
    }    public ActionForward getRegu(ActionMapping mapping,
                                 ActionForm actionForm,
                                 HttpServletRequest servletRequest,
                                 HttpServletResponse servletResponse) {
       ReguDao op = (ReguDao)DaoConfig.getDaoManager().getDao(ReguDao.class);
       ReguBean regu = (ReguBean) actionForm;
       int id = regu.getRegId();
       regu = op.getReguBean(id);
       servletRequest.setAttribute("reguBean",regu);
       return mapping.findForward("listOne");
    }
    public ActionForward listRegu(ActionMapping mapping,
                                 ActionForm actionForm,
                                 HttpServletRequest servletRequest,
                                 HttpServletResponse servletResponse) {
       ReguDao op = (ReguDao)DaoConfig.getDaoManager().getDao(ReguDao.class);
       ReguBean regu = (ReguBean) actionForm;
     //  Collection lt = new ArrayList();
       HttpSession ses = servletRequest.getSession(true);
       List lt = op.getRegsList(regu);
       ses.setAttribute("regsList",lt);
       return mapping.findForward("listAll");
    }}

Answer 2

在art这个action里面最后转向的页面改成类就行了
String action=request.getParameter("action");
if(action=="showList"){
return mapping.findForward("showList");}
else{
return mapping.findForward(" showArtCont");}}

Answer 3

要2楼的那种形式，但是看你的代码还不够清晰，可否给个思路和相关API参考

Answer 4

应该是要1楼的那种形式只要继承DispatchAction 就可以实现了吗？给个答案，结贴。

Answer 5

没错.只有继承了DispatchAction,同时你在 struts-config.xml 配置method=action那么DispatchAction接受到参数为action=doList,就回执行 doList()方法.查看DispatchAction的原代码,你会看到代码是全部请求都会到 execute()方法处理.
execute()方法会判断action的值是多少,然后调用action值对应的方法.

Answer 6

<action />添加属性parameter="method"(依你所列举的应该是parameter="action")
接下来就如1楼所写一样，创建相应方法：showlist(参数)，showArtcont(参数)就OK了！记住继承DispatchAction类，不是普通Action类。

Answer 7

可以在action中利用request.getParameter("action")得到action参数以后，根据其值进行相应处理