如何在我的自定义组件中使用IncludeHandler？ [英] How to use the IncludeHandler inside my custom component?

问题描述

问题：
ui背后的课程：包括JSF标签
我发现我需要使用IncludeHandler来使用

In question: The class behind ui:include JSF tag I found out that I need to use the IncludeHandler to use

<ui:include>

以编程方式。
但是，构造函数需要一个config参数，我不知道如何设置它。

请举例说明如何使用IncludeHandler进行简单包含

programmatically. However, the constructor needs a "config"-parameter and I don't know how to set this up.
Please give an example that shows how to use the IncludeHandler for a simple include like

<ui:include src="include.xhtml" />

我的jsf-component目前是以编程方式构建的，但我想包含一些写成.xhtml的部分。所以最后一个网页设计师只有一个组件，如

My jsf-component currently is built programmaticly but I want to include some parts written as ".xhtml". So at the end a web-designer simply has a component like

<fg:generator></fg:generator>

和一些.xhtml文件可以解决样式问题。如果有比IncludeHandler更好的方法（仍然需要使用Java），请告诉我：）

and some ".xhtml"-files to play around with the styling. If there's a better approach than the IncludeHandler (still needs to be in Java) let me know :)

推荐答案

如果你的唯一目的是以编程方式使用< ui：include> ，那么你应该使用 FaceletContext #includeFacelet（） 而不是。假设您在自定义组件中：

If your sole purpose is to use <ui:include> programmatically, then you should be using FaceletContext#includeFacelet() instead. Assuming that you're inside your custom component:

FacesContext facesContext = FacesContext.getCurrentInstance();
FaceletContext faceletContext = (FaceletContext) facesContext.getAttributes().get(FaceletContext.FACELET_CONTEXT_KEY);
faceletContext.includeFacelet(this, "include.xhtml"); // this is your current UIComponent.

这是另一个启动示例，演示动态包含命令按钮：

Here's another kickoff example which demonstrates dynamic include by command button:

<h:form>
    <h:commandButton value="include" action="#{bean.include}" />
</h:form>
<h:panelGroup id="include" />

with

public void include() throws IOException {
    FacesContext facesContext = FacesContext.getCurrentInstance();
    FaceletContext faceletContext = (FaceletContext) facesContext.getAttributes().get(FaceletContext.FACELET_CONTEXT_KEY);
    faceletContext.includeFacelet(facesContext.getViewRoot().findComponent("foo"), "include.xhtml");
}

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