如何使用 a4j:ajax 或 a4j:actionListener 从 javascript function 调用 bean 方法？

Question

I am using JSF, richfaces 4 stuff and i want to call a bean method when javascript function trigger.

Answer 1

You can use <a4j:jsFunction> , which allows you to perform Ajax requests to invoke the bean method directly from JavaScript code, and the response can be returned in a JSON format to use in a client JavaScript calls.

Please note that <a4j:jsFunction> is required to be inside a <h:form> . For example, you define the a4j:jsFunction likes this:

<h:form> 
    <a4j:jsFunction name="myJsFunction"  action="#{bean.someAction}" reRender="xxxxx"/>
 </h:form>

A javascript function which name called myJsFunction() is created and it will invoke someAction() on the bean when being called.

For example, in your javascript function:

<script type="text/javascript">
function yourJavaScriptFuntion() {
    ..............;
    myJsFunction();  //bean.someAction() will invoke here
    ..............;
}