JSF 2 validateRequired example

“f:validateRequired” is a new validator tag in JSF 2.0, which is used to make sure the input field is not empty. For example,

<h:inputSecret id="password" value="#{user.password}">
    <f:validateRequired />	
</h:inputSecret>

Alternatively, you can use the “required” attribute also, both are doing the same empty value validation.

<h:inputSecret id="password" value="#{user.password}" required="true" />

“f:validateRequired” example

A JSF 2.0 example to show the use of “f:validateRequired” tag to make sure the “password” field is not empty.

1. Managed Bean

An user managed bean.

package com.mkyong;
 
import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
 
@ManagedBean(name="user")
@SessionScoped
public class UserBean implements Serializable{
 
	String password;
	String confPassword;
 
	//getter and setter methods
}

2. JSF Page

JSF XHTML page, show the use of “f:validateRequired” tag to make sure both “password” and “confirm password” fields are not empty.

<?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://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core"
      >
    <h:body>
 
    	<h1>JSF 2 validateRequired example</h1>
 
	<h:form>
 
		<h:panelGrid columns="3">
 
			Enter your password : 
 
			<h:inputSecret id="password" value="#{user.password}" 
				size="20" required="true"
				label="Password" />
 
			<h:message for="password" style="color:red" />
 
			Enter your password again : 
 
			<h:inputSecret id="confPassword" value="#{user.confPassword}" 
				size="20" label="Confirm Password">
				<f:validateRequired />	
			</h:inputSecret>
 
			<h:message for="confPassword" style="color:red" />
 
		</h:panelGrid>
 
		<h:commandButton value="Submit" action="result" />
 
	</h:form>
 
    </h:body>
</html>