Spring MVC Form Validation Example

Here I am going show a simple Spring MVC Form Validation Example.

Technologies :

Spring Framework 3.1.1.RELEASE
Hibernate Validator 4.2.0.Final
Jstl 1.2
Java 8

Spring MVC Form Validation :

Here we are going to validate registration form with different fields like firstName, lastName, age, email by using simple spring validation framework.

Project Structure :

Spring MVC Form Validation Example :

Dependencies: pom.xml

pom.xml

<dependencies>
  <!-- Spring -->
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${org.springframework-version}</version>
  </dependency>
  <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>${org.springframework-version}</version>
  </dependency>
  <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
  <dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-validator</artifactId>
    <version>4.2.0.Final</version>
  </dependency>

  <!-- Servlet -->
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>servlet-api</artifactId>
    <version>2.5</version>
    <scope>provided</scope>
  </dependency>
  <dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.1</version>
    <scope>provided</scope>
  </dependency>
  <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
  </dependency>
</dependencies>

RegistrationBean.java

RegistrationBean.java

package com.spring.controller;

import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Pattern;
import javax.validation.constraints.Size;

public class RegistrationBean {

  @NotNull
  @Size(min = 1, message = "You can't leave this empty.")
  private String firstName;

  @NotNull
  @Size(min = 1, message = "You can't leave this empty.")
  private String lastName;

  @NotNull(message = "You can't leave this empty.")
  @Min(value = 13, message = "You must be greater than or equal to 13")
  @Max(value = 19, message = "You must be less than or equal to 19")
  private Integer age;

  @Pattern(regexp = "^[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,6}$", message = "Invalid email")
  private String email;

  public String getFirstName() {
    return firstName;
  }

  public void setFirstName(String firstName) {
    this.firstName = firstName;
  }

  public String getLastName() {
    return lastName;
  }

  public void setLastName(String lastName) {
    this.lastName = lastName;
  }

  public Integer getAge() {
    return age;
  }

  public void setAge(Integer age) {
    this.age = age;
  }

  public String getEmail() {
    return email;
  }

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

}

@NotNull: It won’t allow the null values.
@Min(13): Won’t allow if the age is a min of 13
@Max(19): Won’t allow if the age is a max of 19
@Pattern: Applied given regex pattern on the specified field (our case it is email)

Registration Form : register.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
   pageEncoding="UTF-8"%>
<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title>Spring MVC Form Validation</title>
      <style>
         .error {
         color: red
         }
      </style>
   </head>
   <body>
      <form:form action="processForm" modelAttribute="registration">
         <div align="center">
            <h2>Register Here</h2>
            <table>
               <tr>
                  <td>First name</td>
                  <td>
                     <form:input type="text" path="firstName" />
                  </td>
                  <td>
                     <form:errors path="firstName" cssClass="error" />
                  </td>
               </tr>
               <tr>
                  <td>Last name (*)</td>
                  <td>
                     <form:input type="text" path="lastName" />
                  </td>
                  <td>
                     <form:errors path="lastName" cssClass="error" />
                  </td>
               </tr>
               <tr>
                  <td>Age </td>
                  <td>
                     <form:input type="text" path="age" />
                  </td>
                  <td>
                     <form:errors path="age" cssClass="error" />
                  </td>
               </tr>
               <tr>
                  <td>Email </td>
                  <td>
                     <form:input type="text" path="email" />
                  </td>
                  <td>
                     <form:errors path="email" cssClass="error" />
                  </td>
               </tr>
               <tr>
                  <td></td>
                  <td><input type="submit" value="Submit" /></td>
               </tr>
            </table>
         </div>
      </form:form>
   </body>
</html>

Registration Controller: RegistrationController.java

RegistrationController.java

package com.spring.controller;

import javax.validation.Valid;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class RegistrationController {

  @RequestMapping(value = "/register", method = RequestMethod.GET)
  public String showForm(Model model) {
    model.addAttribute("registration", new RegistrationBean());
    return "register";
  }

  @RequestMapping(value = "/processForm", method = RequestMethod.POST)
  public String processForm(@Valid @ModelAttribute("registration") RegistrationBean register,
      BindingResult bindingResult) {
    if (bindingResult.hasErrors()) {
      return "register";
    } else {
      return "success";
    }

  }
}

properties file :

application.properties

typeMismatch.registration.age=Invalid Number

Success page: success.jsp

success.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
   pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
   <head>
      <title>Registration Confirmation</title>
   </head>
   <body>
      Hello <font color="green">${registration.firstName} ${registration.lastName} </font> you have successfully registered with us.
   </body>
</html>

Run the application :

http://localhost:8080/Spring-MVC-Form-Validation/register