JSF Validate Bean using javax.validation Annotations

by MemoryNotFound · March 7, 2015

This tutorial shows how to validate a JSF Form using javax.validation annotations on your managed bean. According to the JSR 303: Bean Validation Specification we can Annotate Classes, Methods or properties using the javax.validation annotations. In order to use these annotations we need to add the following maven dependencies: the java validation API and a Reference Implementation (RI).

<!-- java validation API and RI-->
<dependency>
    <groupId>javax.validation</groupId>
    <artifactId>validation-api</artifactId>
    <version>1.1.0.Final</version>
</dependency>
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>5.1.3.Final</version>
</dependency>

JSF Managed Bean

@Size: The annotated element size must be between the specified boundaries (included).
@Pattern: The annotated String must match the following regular expression.

If you need other validations you can lookup all the annotations here.

package com.memorynotfound.jsf;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.RequestScoped;
import javax.validation.constraints.*;

@ManagedBean
@RequestScoped
public class UserBean {

    @Size(min = 3, message = "Name should at least be 3 characters long")
    private String name;

    @Pattern(regexp = "^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\\.[a-zA-Z0-9-.]+$", message = "This is not a valid email")
    private String email;

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

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

JSF Validate Length Input Field Page

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html">
<h:body>
    <h2>JSF validate bean example</h2>
    <h:form>
        <h:panelGrid columns="3">

            <h:outputLabel value="Name:" for="name"/>
            <h:inputText id="name" value="#{userBean.name}"/>
            <h:message for="name" style="color:red" />

            <h:outputLabel value="Email:" for="email"/>
            <h:inputText id="email" value="#{userBean.email}"/>
            <h:message for="email" style="color:red" />

        </h:panelGrid>
        <h:commandButton value="submit" action="result"/>
    </h:form>
</h:body>
</html>

Demo

URL: http://localhost:8080/jsf-validate-bean/