Spring comes with a useful ‘org.springframework.mail.javamail.JavaMailSenderImpl‘ class to simplify the e-mail sending process via JavaMail API. Here’s a Maven build project to use Spring’s ‘JavaMailSenderImpl‘ to send an email via Gmail SMTP server.

1. Project dependency

Add the JavaMail and Spring’s dependency.

File : pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" 
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
  http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.mkyong.common</groupId>
  <artifactId>SpringExample</artifactId>
  <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>SpringExample</name>
  <url>http://maven.apache.org</url>
 
  <repositories>
  	<repository>
  		<id>Java.Net</id>
  		<url>http://download.java.net/maven/2/</url>
  	</repository>
  </repositories>
 
  <dependencies>
 
    <dependency>
              <groupId>junit</groupId>
              <artifactId>junit</artifactId>
              <version>3.8.1</version>
             <scope>test</scope>
    </dependency>
 
    <!-- Java Mail API -->
    <dependency>
	    <groupId>javax.mail</groupId>
	    <artifactId>mail</artifactId>
	    <version>1.4.3</version>
    </dependency>
 
    <!-- Spring framework -->
    <dependency>
     	    <groupId>org.springframework</groupId>
	    <artifactId>spring</artifactId>
	    <version>2.5.6</version>
    </dependency>
 
  </dependencies>
</project>

2. Spring’s Mail Sender

A Java class to send email with the Spring’s MailSender interface.

File : MailMail.java

package com.mkyong.common;
 
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;
 
public class MailMail
{
	private MailSender mailSender;
 
	public void setMailSender(MailSender mailSender) {
		this.mailSender = mailSender;
	}
 
	public void sendMail(String from, String to, String subject, String msg) {
 
		SimpleMailMessage message = new SimpleMailMessage();
 
		message.setFrom(from);
		message.setTo(to);
		message.setSubject(subject);
		message.setText(msg);
		mailSender.send(message);	
	}
}

3. Bean configuration file

Configure the mailSender bean and specify the email details for the Gmail SMTP server.

Note
Gmail configuration details – http://mail.google.com/support/bin/answer.py?hl=en&answer=13287

File : Spring-Mail.xml

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
 
<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
	<property name="host" value="smtp.gmail.com" />
	<property name="port" value="587" />
	<property name="username" value="username" />
	<property name="password" value="password" />
 
	<property name="javaMailProperties">
	   <props>
       	      <prop key="mail.smtp.auth">true</prop>
       	      <prop key="mail.smtp.starttls.enable">true</prop>
       	   </props>
	</property>
</bean>
 
<bean id="mailMail" class="com.mkyong.common.MailMail">
	<property name="mailSender" ref="mailSender" />
</bean>
 
</beans>

4. Run it

package com.mkyong.common;
 
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
 
public class App 
{
    public static void main( String[] args )
    {
    	ApplicationContext context = 
             new ClassPathXmlApplicationContext("Spring-Mail.xml");
 
    	MailMail mm = (MailMail) context.getBean("mailMail");
        mm.sendMail("from@no-spam.com",
    		   "to@no-spam.com",
    		   "Testing123", 
    		   "Testing only \n\n Hello Spring Email Sender");
 
    }
}

Download Source Code

Download it – Spring-Email-Gmail-Smtp-Example.zip
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