Spring Portlet MVC sendRedirect和setRenderParameter [英] Spring Portlet MVC sentRedirect and setRenderParameter

问题描述

在Liferay中，我可能遇到了一个可能简单的Spring Portlet重定向和jsp渲染问题.

I am stuck with a probably simple Spring Portlet redirect and jsp render problem in Liferay.

我在Liferay page1 和 page2 中有两个页面，还有一个spring mvc portlet portletA ，其中有两个JSP defaultView.jsp 和 second.jsp .

I have two Pages in Liferay page1 and page2 and one spring mvc portlet portletA with two JSPs defaultView.jsp and second.jsp.

page1和page2都实例化portletA.

page1 and page2 both instantiate portletA.

portletA默认通过调用@RenderMapping()方法加载defaultView.jsp.

portletA loads by default the defaultView.jsp by calling the @RenderMapping() method.

DefaultViewController :

@RenderMapping
public String renderDefaultView() {
    return "defaultView";
}

可以通过http重定向(@ActionMapping resp.sendRedirect())从defaultView.jsp调用liferay page2

From defaultView.jsp the liferay page2 can be called by http redirect (@ActionMapping resp.sendRedirect())

defaultView.jsp :

 $(nRow).click(function() {
      window.location.href = "<portlet:actionURL name='doGotoPage2' />"
 });

DefaultViewController :

@ActionMapping("doGotoPage2")
public void doGoToMedicalAid(ActionRequest req,
        ActionResponse resp) {

    try {
        resp.sendRedirect("/group/project/page2");
    } catch (IOException ex) {
        Logger.getLogger(DefaultViewController.class.getName()).log(Level.SEVERE, null, ex);
    }
}

现在我想知道

从页面1重定向后，如何告诉portletA在页面2上调用不同的@RenderMapping方法?

how can I tell portletA to call a different @RenderMapping method on page2 after the redirect from page1 ?

我希望portletA在page2上呈现second.jsp:

I would like portletA to render second.jsp on page2:

@RenderMapping(value = "renderSecondPage")
public String renderSecondPage() {
    return "second";
}

据我了解，我无法在sendRedirect之前或之后的操作阶段设置renderParameters！

As far as I understand, I can't set renderParameters in the action phase before or after a sendRedirect!

例如，这不起作用，并导致 java.lang.IllegalStateException:设置渲染参数已被调用

For example, this doesn't work and results in an java.lang.IllegalStateException: Set render parameter has already been called

 resp.sendRedirect("/group/project/page2");
 resp.setRenderParameter("render", "renderSecondPage");

非常感谢您的帮助！

推荐答案

Portlet API文档指出:

在以下任何一种ActionResponse方法之后，无法调用sendRedirect方法 界面已被调用:

The sendRedirect method can not be invoked after any of the following methods of the ActionResponse interface has been called:

• setPortletMode
• setWindowState
• setRenderParameter
• setRenderParameters

• setPortletMode
• setWindowState
• setRenderParameter
• setRenderParameters

您需要使用另一个作用域来存储属性.

You'll need to use another scope for storing the attribute.

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