JSF RegEx Validator Example





Hey guys in this post, we will discuss validating email address using RegEx in JSF with Example

Overview


  • To create textbox we use <h:inputText> tag
  • We will add the attribute required to true
  • We will add the attribute requiredMessage for custom validation message
  • To validate using RegEx we will use <c:validateRegex> tag
  • We will use <h:message> tag to display the error messages

Complete example


We will create this example step by step, follow this tutorial till the end

Read More:

Create Dynamic Web Project


To create a dynamic web project, you can read the following tutorial

Create a bean


Create Register.java file inside the in.bushansirgur.jsf.beans package and add the following content

package in.bushansirgur.jsf.beans;

import javax.faces.bean.ManagedBean;

@ManagedBean
public class Register {
	
	private String email;
	
	private String name;
	
	public Register() {
	
	}

	public String getEmail() {
		return email;
	}

	public void setEmail(String email) {
		this.email = email;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}	
}

Create Input form


Create register-form.xhtml file inside the WebContent and add the following content

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
		xmlns:h="http://xmlns.jcp.org/jsf/html"
		xmlns:c="http://xmlns.jcp.org/jsf/core">

	<h:head>
		<title>Input Form</title>
		<style>
			.error {
				color: red;
				font-style: italic;
			}
		</style>
	</h:head>
	
	<h:body>
		
		<h:form>
			Name: <h:inputText id="name" label="Name" value="#{register.name}">
				<c:validateLength minimum="5" maximum="15" />
			</h:inputText>
			<h:message for="name" styleClass="error" />
			<br/><br/>
			Email: <h:inputText id="email" value="#{register.email}" validatorMessage="Please enter valid email">
				<c:validateRegex pattern="^[A-Za-z0-9+_.-][email protected](.+)$" />
			</h:inputText>
			<h:message for="email" styleClass="error" />
			<br/><br/>
			<h:commandButton value="Register" action="dashboard" />
		</h:form>
		
	</h:body>

</html>

Create a Response page


Create dashboard.xhtml file inside the WebContent and add the following content

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
		xmlns:h="http://xmlns.jcp.org/jsf/html"
		xmlns:ui="http://xmlns.jcp.org/jsf/facelets">

	<h:head>
		<title>Dashboard</title>
	</h:head>
	
	<h:body>
		
		<div>
			<span>The Logged in user is: #{register.email}</span>
		</div>
		<div>
			<p>Your name is: #{register.name}</p>
		</div>
	</h:body>

</html>

Run the app


To run the application, right click on the project, select Run As -> choose Run on Server

Open the browser, navigate to the URL http://localhost:8080/JSF-hello-world/faces/register-form.xhtml
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About the author

Bushan Sirgur

Hey guys, I am Bushan Sirgur from Banglore, India. Currently, I am working as an Associate project in an IT company.

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