Bean validation: Email: validate email

If you annotate @Email annotation on top of CharSequence, then the CharSequence should be a well-formed email address.

What are the supported types?

You can apply this annotation on any CharSequence type.

Where can I apply this annotation?

a.   METHOD, F

b.   IELD,

c.    ANNOTATION_TYPE,

d.   CONSTRUCTOR,

e.   PARAMETER,

f.     TYPE_USE

Find the below working application.

Employee.java

package com.sample.model;

import javax.validation.constraints.Email;

public class Employee {

 private int id;

 private String name;

 @Email
 public String emailId;

 public Employee(int id, String name, String emailId) {
  this.id = id;
  this.name = name;
  this.emailId = emailId;
 }

 public int getId() {
  return id;
 }

 public void setId(int id) {
  this.id = id;
 }

 public String getName() {
  return name;
 }

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

 public String getEmailId() {
  return emailId;
 }

 public void setEmailId(String emailId) {
  this.emailId = emailId;
 }

}

Test.java    

package com.sample.test;

import java.util.Set;

import javax.validation.*;
import javax.validation.ValidatorFactory;

import com.sample.model.Employee;

public class Test {
 private static ValidatorFactory validatorFactory = Validation.buildDefaultValidatorFactory();
 private static Validator validator = validatorFactory.getValidator();

 private static void validateBean(Employee emp) {
  System.out.println("************************************");
  Set<ConstraintViolation<Employee>> validationErrors = validator.validate(emp);

  if (validationErrors.size() == 0) {
   System.out.println("No validation errors....");
  }

  for (ConstraintViolation<Employee> violation : validationErrors) {
   System.out.println(violation.getPropertyPath() + "," + violation.getMessage());
  }
  System.out.println("");
 }

 public static void main(String args[]) {

  Employee emp1 = new Employee(1, "Krishna", "AA");
  System.out.println("Validation errors on bean emp1");
  validateBean(emp1);

  Employee emp2 = new Employee(2, "Siva", "krihsna@abc.com");
  System.out.println("Validation errors on bean emp2");
  validateBean(emp2);
 }
}

Output

Validation errors on bean emp1

************************************

emailId,must be a well-formed email address

Validation errors on bean emp2

************************************

No validation errors....

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