java从Struts操作的钩子更改表单值（Liferay 6.2）

Question

我只是想改变一个来自表单的值。我挂接了一个Struts Action来更改该值，然后继续使用默认的processAction。但它没有应用这些变化

这是我的钩子代码：

public class EditRecordDisplayPortletAction extends BaseStrutsPortletAction {
    ...

    public void processAction(
            StrutsPortletAction originalStrutsPortletAction,
            PortletConfig portletConfig, ActionRequest actionRequest,
            ActionResponse actionResponse)
        throws Exception {
        ThemeDisplay themeDisplay = (ThemeDisplay)actionRequest.getAttribute(WebKeys.THEME_DISPLAY);

        ...
        //Stuff that is working here ...
        ...

        //Here I change the value that is comming from the form that should be used later:
        DynamicActionRequest dynamicActionRequest = null;
        Map<String, String[]> params = new HashMap();

        String observationInputKey = getObservationInputKey();
        params.put(observationInputKey, new String[]{"Here goes some text I have calculated in the hook."});
            dynamicActionRequest = new DynamicActionRequest(actionRequest, params, false);
        //Continues with the normal operation, but it's not using the new values:
        originalStrutsPortletAction.processAction(
            originalStrutsPortletAction, portletConfig, dynamicActionRequest,
            actionResponse);
    }
    ...

我正在使用DynamicActionRequest，因为我无法更改__actionRequest__。想了解更多信息，这里有人解释了一些类似的东西，应该是有效的： Wrap actionRequest with a DynamicActionRequest

Answer 1

按照您链接的论坛帖子的示例，您可以更简单地创建DynamicActionRequest。请尝试一下：

public void processAction(
        StrutsPortletAction originalStrutsPortletAction,
        PortletConfig portletConfig, ActionRequest actionRequest,
        ActionResponse actionResponse)
    throws Exception {
    ThemeDisplay themeDisplay = (ThemeDisplay)actionRequest.getAttribute(WebKeys.THEME_DISPLAY);

    ...
    //Stuff that is working here ...
    ...

    DynamicActionRequest dynamicActionRequest = new DynamicActionRequest(actionRequest);

    String observationInputKey = getObservationInputKey();
    dynamicActionRequest.setParameter(observationInputKey, "Here goes some text I have calculated in the hook.");

    //Continues with the normal operation, but it's not using the new values:
    originalStrutsPortletAction.processAction(
        originalStrutsPortletAction, portletConfig, dynamicActionRequest,
        actionResponse);
}
...

当然，javadoc for DynamicActionRequest只包含方法名，但是您将布尔参数inherit指定给构造函数作为false。那可能是你唯一的问题