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最新推荐文章于 2021-06-17 17:20:32 发布

huojiao2006

最新推荐文章于 2021-06-17 17:20:32 发布

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本文详细介绍了 RichFaces 中 a4j:jsFunction 组件的使用方法及应用场景。该组件允许从 JavaScript 代码直接发起 Ajax 请求，并将服务器返回的数据以 JSON 形式传递给客户端的 JavaScript 函数进行处理。

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转载地址：http://docs.jboss.org/richfaces/latest_3_3_X/en/devguide/html_single/

6.1.8. < a4j:jsFunction > available since 3.0.0

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6.1.8.1. Description 6.1.8.2. Details of Usage 6.1.8.3. Reference Data 6.1.8.4. Relevant Resources Links

6.1.8.1. Description

The component allows to perform Ajax requests directly from JavaScript code, invoke server-side data and return it in a JSON format to use in a client JavaScript calls.

6.1.8.2. Details of Usage

As the component uses Ajax request to get data from server it has all common Ajax Action attributes. Hence, "action" and "actionListener" can be invoked, and reRendering some parts of the page fired after calling function.

When using the it's possible to initiate the Ajax request from the JavaScript and perform partial update of a page and/or invoke the JavaScript function with data returned by Ajax response.

 ...


<body onload="callScript()">


      


             ...


            <a4j:jsFunction name="callScript" data="#{bean.someProperty1}" reRender="someComponent" oncomplete="myScript(data.subProperty1, data.subProperty2)">


                  <a4j:actionparam name="param_name" assignTo="#{bean.someProperty2}"/>


            </a4j:jsFunction>


            ...


      


      ...


</body>


...

The allows to use or pure for passing any number of parameters of the JavaScript function into Ajax request. is similar to , but it could be activated from the JavaScript code. It allows to invoke some server-side functionality and use the returned data in the JavaScript function invoked from "oncomplete" attribute. Hence it's possible to use instead of . You can put it anywhere, just don't forget to use and around it.

Information about the "process" attribute usage you can find "Decide what to process" guide section.

6.1.8.3. Reference Data

Table of attributes.

Table 6.8. Component Identification Parameters

Name	Value
component-type	org.ajax4jsf.Function
component-family	org.ajax4jsf.components.ajaxFunction
component-class	org.ajax4jsf.component.html.HtmlajaxFunction
renderer-type	org.ajax4jsf.components.ajaxFunctionRenderer

6.1.8.4. Relevant Resources Links

Visit the jsFunction page at RichFaces LiveDemo for component usage and sources for the given examples.

Useful articles:

"JsFunctionJson" article in the RichFaces Cookbook describes how to use "a4j:jsFunction" to call the jsonTest backing bean that generates some random data in a JSON String;