如何从JSF Bean调用JavaScript函数? [英] How would I call a JavaScript function from a JSF Bean?

问题描述

我需要从Java代码中执行此操作，我尝试了以下操作，但被卡住了:

  UIOutput js =新的UIOutput();js.setRendererType("javax.faces.resource.Script");js.getAttributes().put("library"，"js");js.setValue("alert(123);");FacesContext context = FacesContext.getCurrentInstance();context.getViewRoot().addComponentResource(context，js，"body"); 

我在服务器日志中没有收到此错误，但是也没有看到警报.

有什么主意吗?

编辑:我尝试了建议的解决方案，即所谓的重复项，但也没有收到服务器错误，但也没有看到任何警报.

解决方案

我假设您想从JSF ManagedBean(而不是JSF组件)执行此操作.

我不确定对此是否有简单的" jsf解决方案(意味着不添加其他框架或创建和维护一些特定的Java代码).

至少有2种解决方案(我曾使用过):

• Ajax.onComplete("alert('Hi"))来自 OmniFaces实用程序框架
• RequestContext.getCurrentInstance().execute("alert('Hi")")来自 PrimeFaces

我确定所有其他组件套件(RichFaces，IceFaces，OpenFaces等)都有一些类似的解决方案.

如果您想继续使用纯JSF，我会继续使用OmniFaces.通常，这是一个很好的补充，它会阻止您维护有关实现细节的知识.

我刚刚找到了纯jsf解决方案

I need to do this from Java code, I was trying the following, but got stuck:

    UIOutput js = new UIOutput();
    js.setRendererType("javax.faces.resource.Script");
    js.getAttributes().put("library", "js");
    js.setValue("alert(123);");

    FacesContext context = FacesContext.getCurrentInstance();
    context.getViewRoot().addComponentResource(context, js, "body");

I didn't get an error with this in the server log, but also didn't see the alert.

Any idea?

EDIT: I tried the suggested solution, the alleged duplicate, and I didn't get a server error either, but neither did I see any alert..

解决方案

I'm assuming you want to do this from a JSF ManagedBean, not a JSF Component.

I'm not sure there is a 'plain' jsf solution for this (meaning not adding another framework or creating and maintaining some specific java code).

There are at least 2 solutions (the ones I worked with):

• Ajax.onComplete("alert('Hi'')") from the OmniFaces utility framework
• RequestContext.getCurrentInstance().execute("alert('Hi'')") from PrimeFaces

I'm sure all other component suites (RichFaces, IceFaces, OpenFaces, ...) have some similar solution.

If you want to stay using plain JSF, I'd go for using OmniFaces. It's a great addition in general and prevents you from maintaining knowledge about implementation specifics.

Edit: I just found a plain jsf solution

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