RichFaces a4j:CommandButton

by Online Tutorials Library July 14, 2022

RichFaces <a4j:commandButton>

The <a4j:commandButton> component is similar to the JavaServer Faces ( JSF) <h:commandButton> component, but additionally includes Ajax support.

It requires only one value attribute to be used. We can use it to set text for the command button.

By default, the <a4j:commandButton> uses the click event instead of the submit event.

Note – The <a4j:commandButton> component has the execute=”@form” setting by default. To limit rendering to a different scope, redefine the execute attribute.

Example

Here, in the following example, we are implementing <a4j:commandButton> component. This example contains the following files.

JSF File

// commandButton.xhtml

  <!DOCTYPE html>  <ui:composition xmlns=”http://www.w3.org/1999/xhtml”  xmlns:h=”http://java.sun.com/jsf/html”  xmlns:f=”http://java.sun.com/jsf/core”  xmlns:ui=”http://java.sun.com/jsf/facelets”  xmlns:a4j=”http://richfaces.org/a4j”  xmlns:rich=”http://richfaces.org/rich”>  <h:form id=”form”>  <h:outputText value=”User Name ” />  <h:inputText value=”#{user.name}” />  <a4j:commandButton value=”Enter Your Name” execute=”@form” />  </h:form>  <br/>  <a4j:outputPanel>  <h:outputText value=”Hello #{user.name} !” rendered=”#{not empty user.name}” />  </a4j:outputPanel>  </ui:composition>  

Managed Bean

// User.java

  import javax.faces.bean.ManagedBean;  import javax.faces.bean.RequestScoped;  @ManagedBean  @RequestScoped  public class User {  String name;  public String getName() {  return name;  }  public void setName(String name) {  this.name = name;  }  }  

Output:

RichFaces A4j commandbutton 1

Next TopicRichFaces <a4j:commandlink>

RichFaces a4j:CommandButton

RichFaces <a4j:commandButton>

Note – The <a4j:commandButton> component has the execute=”@form” setting by default. To limit rendering to a different scope, redefine the execute attribute.

Example

JSF File

Managed Bean

Verbal Reasoning | Assertion and Reason 1

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