点击这些按钮时进入到同一个action中找到相应的方法

 

       

       
       
       
       
   

 

问题是这样的:页面上有多个按钮,我需要当点击这些按钮时全部进入到同一个action中,但是这个action中有不同的方法.比如insert() delete()等,我点击不同按钮时怎么能够让它找到相应的方法呢?

不用JavaScript、DispatchAction就可以来做：

       
       
       
       

假如用户点了“插入”按钮，这时：
request.getParameter("insert")=="插入";
request.getParameter("delete")==null;
request.getParameter("modify")==null;
request.getParameter("list")==null;

以此类推!也就是说无论多少submit类型的按钮，只有一个不为空。这时在Struts1的Action中以用反射方法来做：

 


public class MyAction extends Action{//注意，这里并不需要继承DispatchAction

    public ActionForward execute(ActionMapping mapping, ActionForm from, HttpServletRequest request, HttpServletResponse response) throws Exception {
        String func = {"insert","delete","modify","list"};
        String methodName = null;
        for(String f : func){
                if(request.getParameter(f) != null){
                    methodName = request.getParameter(f);
                    break;
                }
        }
        try {
            //利用反射技术让程序自动找到要处理的方法并执行之，注意methodName参数

            Method method = this.clazz.getDeclaredMethod(methodName, ActionMapping.class, ActionForm.class, HttpServletRequest.class, HttpServletResponse.class);
            return (ActionForward)method.invoke(this, mapping, from, request, response);
        } catch (Exception e) {
            request.setAttribute("message", e.getMessage());
            return mapping.findForward("message");
        }
    }
    public ActionForward insert(ActionMapping mapping, ActionForm from, HttpServletRequest request, HttpServletResponse response) throws Exception {
        //todo

    }
    public ActionForward delete(ActionMapping mapping, ActionForm from, HttpServletRequest request, HttpServletResponse response) throws Exception {
        //todo

    }
    public ActionForward modify(ActionMapping mapping, ActionForm from, HttpServletRequest request, HttpServletResponse response) throws Exception {
        //todo

    }
    public ActionForward list(ActionMapping mapping, ActionForm from, HttpServletRequest request, HttpServletResponse response) throws Exception {
        //todo

    }