Question

尝试将用户重定向到登录页面，如果他们的会话在我编写的processPreProcess覆盖中不再有效。我用过两个

response.sendRedirect("launch.do?method=launchLogin&type=multi");

和

ActionMapping loginMapping = processMapping(request, response, "/launch");
ActionForward loginForward = loginMapping.findForward("launchLogon");
processForwardConfig(request, response, loginForward);

我可以看到正在调用的正确登录操作，并且它成功转发到正确的页面，但我的表单值由于某种原因没有传递给JSP。我在动作中设置了表单值，如下所示：

if (type !=null && type.equals("multi")){
Collection<OptionBean> list = this.loadApplicationDropDown();

if (list != null) {
   theForm.setApplicationList(list);
   theForm.setShowDropDown(true);
    }
 }
 return mapping.findForward("Success");

我可以看到正在运行此代码并且这些成员正确填充但是一旦它到达JSP，applicationList就为空，showDropDown为false。我也知道Action类正常工作，因为如果我正常启动应用程序，表单会显示填充下拉元素。

我还需要做些什么来确保我的ActionForm在范围内吗？

修改这是jsp上的相关代码。我使用bean：write来检查showDropDown的值，即使在操作中将其设置为true，它也会返回false。 applicationList在遇到jsp时也是空的，但是我再次看到它被填充了：

<logic:present property="applicationList" name="logonForm">
   <logic:equal property="showDropDown" name="logonForm" value="true">
   <tr>
    <td class="lbl" align="left">
          <html:select property="application" size="1">
            <html:optionsCollection name="logonForm" property="applicationList" value="value" label="label"/>
          </html:select>
        </td>
    </TR>
    </logic:equal>
    </logic:present>

修改这是动作映射定义：

action   path="/launch"
              type="otrack.core.LaunchApplicationAction"
              parameter="method"
              name="logonForm"
              scope="request"
              input="/jsp/index.jsp">
              <forward   name="launchLogon" path="/launch.do?method=launchLogin&amp;type=multi"/>
              <forward   name="Success" path="/jsp/Logon.jsp"/>
              <forward   name="Launch" path="/jsp/appFrameNew.jsp"/>
              <forward   name="Failure" path="/jsp/index.jsp"/>
    </action>

以下是Action类中的完整方法：

public ActionForward launchLogin(ActionMapping mapping, ActionForm form,
        HttpServletRequest request, HttpServletResponse response)
        throws IOException, ServletException {

        LogonForm theForm = (LogonForm) form;
        ActionErrors errors = new ActionErrors();
        try {
            //get the request parameter name "type" to know if
            //drop down needs to be shown or not
            String type = request.getParameter("type");

            if (type !=null && type.equals("multi")){
                Collection<OptionBean> list = this.loadApplicationDropDown();

                if (list != null) {
                    //set the option list on the form
                    theForm.setApplicationList(list);
                    theForm.setShowDropDown(true);
                }
            }

            HttpSession session = request.getSession(false);

            return mapping.findForward("Success");
        } catch (Exception e) {
            if (e instanceof AppException) {
                AppException ae = (AppException) e;

                if (ae.getRootCause() != null) {
                    errors.add(ActionErrors.GLOBAL_ERROR,
                        new ActionError(ae.getMessage().trim(), ae.getRootCause().getMessage()));
                } else {
                    errors.add(ActionErrors.GLOBAL_ERROR,
                        new ActionError(ae.getMessage().trim(), ""));
                }

                saveErrors(request, errors);

                return (new ActionForward(mapping.getInput()));
            }

            return (new ActionForward("Failure"));
        }
    }

重定向Struts 1 processPreProcess方法

0 个答案: