在支持Bean中读取隐藏值时为空值(Null value when Reading Hidden Value in Backing Bean)

在支持Bean中读取隐藏值时为空值(Null value when Reading Hidden Value in Backing Bean)

这是我的用例：

我在我的.xhtml页面中有一个CKEditor和隐藏的值，如下所示：

<p:panelGrid columns="1" id="pnTemplateHeader" style="width:700px"> <h:inputHidden required="false" value="#{templateBean.headerContent}" id="headerValue" binding="#{templateBean.hiddenHeader}"/> <h:inputTextarea cols="90" rows="20" class="ckeditor" id="head" name="head" > #{templateBean.headerContent} </h:inputTextarea> <script type="text/javascript" > CKEDITOR.replace('head', { removeButtons: 'Underline,Strike,Subscript,Superscript,Anchor,Styles,Specialchar', }); </script> </p:panelGrid>

现在，我需要能够检索用户在CKEditor中输入的所有文本，我在http://kb4dev.com/tutorial/jsf-and-ckeditor/jsf-2.x--ckeditor-集成引导

他们说我可以使用以下方法从隐藏的后台bean中检索值。

.xhtml：

<h:commandButton id="previewTemplateButton" onclick="document.getElementById('frmCreateTemplate:footerValue').value = CKEDITOR.instances.footer.getData(); action="#{templateBean.export2PDF}" > </h:commandButton>

但是当我获得支持bean的值时，我只是得到一个NULL值。

后盾豆：

System.out.println("Values: footer=" + footerContent + ", body= " + bodyContent + ", header=" + headerContent);

什么可能是错的？

我已经测试了几种方法，比如像这样在后台bean中访问隐藏的组件：

UIViewRoot root = FacesContext.getCurrentInstance().getViewRoot(); UIComponent hiddenHeaderComp = root.findComponent("headerValue"); hiddenHeaderComp = getUIComponentOfId(root, "headerValue"); hiddenHeader = (UIInput)hiddenHeaderComp; if(hiddenHeader != null){ System.out.println("After retrieving value: " + hiddenHeader.getValue()); }

但是这也不起作用。 我能做什么？

this is my use case:

I have a CKEditor and hidden value in my .xhtml page like this:

<p:panelGrid columns="1" id="pnTemplateHeader" style="width:700px"> <h:inputHidden required="false" value="#{templateBean.headerContent}" id="headerValue" binding="#{templateBean.hiddenHeader}"/> <h:inputTextarea cols="90" rows="20" class="ckeditor" id="head" name="head" > #{templateBean.headerContent} </h:inputTextarea> <script type="text/javascript" > CKEDITOR.replace('head', { removeButtons: 'Underline,Strike,Subscript,Superscript,Anchor,Styles,Specialchar', }); </script> </p:panelGrid>

Now, I need to be able to retrieve all text the user has entered in CKEditor, I've found this way in http://kb4dev.com/tutorial/jsf-and-ckeditor/jsf-2.x--ckeditor-integration-guide

They say I can retrieve value from hidden in backing bean using the following.

.xhtml:

<h:commandButton id="previewTemplateButton" onclick="document.getElementById('frmCreateTemplate:footerValue').value = CKEDITOR.instances.footer.getData(); action="#{templateBean.export2PDF}" > </h:commandButton>

But when I get the value in backing bean, I just get a NULL, value.

Backing bean:

System.out.println("Values: footer=" + footerContent + ", body= " + bodyContent + ", header=" + headerContent);

What could be wrong?

I have tested several approaches like accessing hidden component right in the backing bean like this:

UIViewRoot root = FacesContext.getCurrentInstance().getViewRoot(); UIComponent hiddenHeaderComp = root.findComponent("headerValue"); hiddenHeaderComp = getUIComponentOfId(root, "headerValue"); hiddenHeader = (UIInput)hiddenHeaderComp; if(hiddenHeader != null){ System.out.println("After retrieving value: " + hiddenHeader.getValue()); }

But this isn't working either. What can I do?

最满意答案

那么，我发现了这个问题。 这里真正的问题是，我只是使用inputhidden值调用组件，但它位于一个Primefaces Accordion中，该组件位于表单内部，所以我缺少了：form：accordionid input.hidden id之前

Well, I have found the problem. The real problem here is that I was calling the component just with the inputhidden value, but it is inside a Primefaces Accordion which in turn is inside the form, so I was missing :form:accordionid before inputhidden id