JSF commandButton example

02 November 2013
By Gonçalo Marques
This tutorial belongs to a series of articles that will describe the available UI controls and components in JSF. In this article we will cover JSF commandButton.

Example usage

We start this article by defining a JSF view containing a simple form. The form submission will be triggered by a commandButton:

commandButton example

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
  <title>JSF - commandButton example</title>

    <h:inputText value="#{testBean.input}" />
    <h:commandButton value="Submit" action="#{testBean.submit}">

  <h:outputText value="#{testBean.output}" />


We are defining a simple form containing an inputText and a commandButton. The commandButton will submit the form when clicked by the user. There is also an outputText that will display the input entered by the user.

The next section will show the bean that will be used to hold both input and output fields and also the submit method.

The bean

We will also need a bean to handle form submission and hold the field's values:


package com.byteslounge.jsf;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;

public class TestBean {

  private String input;
  private String output;

  public void submit() {
    // handle form submission
    output = "You submitted: " + input;

  public String getInput() {
    return input;

  public void setInput(String input) {
    this.input = input;

  public String getOutput() {
    return output;

  public void setOutput(String output) {
    this.output = output;



When we access the testing page URL:


The following output will be generated

Before form submission
Before form submission

After form submission the user input will be echoed by the server:

After form submission
After form submission

The action method

In the previous example the action method doesn't return any value, so the same page will be presented to the user after the form is submitted.

We may change the action method to return a String:

Alternative action method

public String submit() {
  // do work
  return "sucess";

In this case JSF will search for a view called sucess.xhtml in the same folder as the form view and display it instead. If the target view is not in the same folder as the form view we may return a String containing the path to the target view relative to the application context path.

Keep in mind that the result view will be chosen internally, ie. JSF will pick another view and display it but the client browser will not request the new page.

If we wish to send a redirect to the client browser forcing it to request the new page we must change the action method like the following:

Alternative action method

public String submit() {
  // do work
  return "sucess?faces-redirect=true";

The faces-redirect=true parameter will instruct JSF that it must issue a redirect to the client browser. Note that this parameter will not be included in the redirect URL sent to the client. It's just used internally by JSF.

commandButton types

commandButton has an attribute named type.


<h:commandButton value="Submit" action="#{testBean.submit}" type="submit">

If type attribute is omitted JSF will use submit as the default. As the name states, a commandButton with type submit will be rendered as an HTML input with type submit:

Rendered HTML

<input type="submit" name="j_idt5:j_idt8" value="Submit" />

Other possible values for type attribute are button and reset that will in turn render HTML inputs of type button and reset respectively.

Download source code from this article

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About the author
Gonçalo Marques is a Software Engineer with several years of experience in software development and architecture definition. During this period his main focus was delivering software solutions in banking, telecommunications and governmental areas. He created the Bytes Lounge website with one ultimate goal: share his knowledge with the software development community. His main area of expertise is Java and open source.

GitHub profile: http://github.com/gonmarques

He is also the author of the WiFi File Browser Android application: