Primefaces CommandLink

by Online Tutorials Library July 14, 2022

PrimeFaces CommandLink

It is an extended version of JSF h:commandLink with Ajax, partial processing and confirmation feature. It is used to create a link which redirects control to specified target.

The <p:commandLink> component is used to create a link in JSF application. It has various attributes that are tabled below.

CommandLink Attributes

Attribute	Default value	Type	Description
id	null	String	Unique identifier of the component
value	null	String	Href value of the rendered anchor.
action	null	MethodExpr/ String	A method expression or a String outcome that’d be processed when link is clicked.
async	false	Boolean	When set to true, ajax requests are not queued.
process	null	String	Component(s) to process partially instead of whole view.
ajax	true	Boolean	Specifies the submit mode, when set to true(default), submit would be made with Ajax.
update	null	String	Component(s) to be updated with ajax.
global	true	Boolean	Defines whether to trigger ajaxStatus or not.
resetValues	false	Boolean	If true, local values of input components to be updated within the ajax request would be reset.
timeout	0	Integer	Timeout for the ajax request in milliseconds.
type	null	String	Type of resource referenced by the link.
form	null	String	Form to serialize for an ajax request. Default is the enclosing form.

Example

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

JSF File

// commandLink.xhtml

  <?xml version=’1.0′ encoding=’UTF-8′ ?>  <!DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN””http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”>  <html xmlns=”http://www.w3.org/1999/xhtml”  xmlns:h=”http://xmlns.jcp.org/jsf/html”  xmlns:p=”http://primefaces.org/ui”>  <h:head>  <title>CommandLink</title>  </h:head>  <h:body>  <h:form>  <h2>CommandLink Example</h2>  <p:growl id=”growl” life=”3000″ />  <p:commandLink id=”ajax” update=”growl” actionListener=”#{commandLink.buttonAction}”>  <h:outputText value=”Click here” />  </p:commandLink>  </h:form>  </h:body>  </html>  

ManagedBean

// CommandLink.java

  package com.tutoraspire;  import javax.faces.application.FacesMessage;  import javax.faces.bean.ManagedBean;  import javax.faces.context.FacesContext;  import javax.faces.event.ActionEvent;  @ManagedBean  public class CommandLink {  public void buttonAction(ActionEvent actionEvent) {  addMessage(“You just clicked a link”);  }  public void addMessage(String summary) {  FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, summary,  null);  FacesContext.getCurrentInstance().addMessage(null, message);  }  }  

Output:

PrimeFaces CommandLink 1
PrimeFaces CommandLink 2

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