Here’s an example to use Spring to send e-mail that has attachments via Gmail SMTP server. In order to contains the attachment in your e-mail, you have to use Spring’s JavaMailSender & MimeMessage , instead of MailSender & SimpleMailMessage.

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

You have to use JavaMailSender instead of MailSender to send attachments, and attach the resources with MimeMessageHelper. In this example, it will get the “c:\\log.txt” text file from your file system (FileSystemResource) as an e-mail attachment.

Beside file system, you can also get any resources from URL path(UrlResource), Classpath (ClassPathResource), InputStream (InputStreamResource)… please refer to Spring’s AbstractResource implemented classes.

File : MailMail.java

package com.mkyong.common;
 
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
 
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.MailParseException;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
 
public class MailMail
{
	private JavaMailSender mailSender;
	private SimpleMailMessage simpleMailMessage;
 
	public void setSimpleMailMessage(SimpleMailMessage simpleMailMessage) {
		this.simpleMailMessage = simpleMailMessage;
	}
 
	public void setMailSender(JavaMailSender mailSender) {
		this.mailSender = mailSender;
	}
 
	public void sendMail(String dear, String content) {
 
	   MimeMessage message = mailSender.createMimeMessage();
 
	   try{
		MimeMessageHelper helper = new MimeMessageHelper(message, true);
 
		helper.setFrom(simpleMailMessage.getFrom());
		helper.setTo(simpleMailMessage.getTo());
		helper.setSubject(simpleMailMessage.getSubject());
		helper.setText(String.format(
			simpleMailMessage.getText(), dear, content));
 
		FileSystemResource file = new FileSystemResource("C:\\log.txt");
		helper.addAttachment(file.getFilename(), file);
 
	     }catch (MessagingException e) {
		throw new MailParseException(e);
	     }
	     mailSender.send(message);
         }
}

3. Bean configuration file

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

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" />
	<property name="simpleMailMessage" ref="customeMailMessage" />
</bean>
 
<bean id="customeMailMessage"
	class="org.springframework.mail.SimpleMailMessage">
 
	<property name="from" value="from@no-spam.com" />
	<property name="to" value="to@no-spam.com" />
	<property name="subject" value="Testing Subject" />
	<property name="text">
	<value>
		<![CDATA[
			Dear %s,
			Mail Content : %s
		]]>
	</value>
    </property>
</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("Yong Mook Kim", "This is text content");
 
    }
}

output

 Dear Yong Mook Kim,
 Mail Content : This is text content
 
 Attachment : log.txt

Download Source Code

Download it – Spring-Email-Attachment-Example.zip
Note : You can find more similar articles at - Spring Tutorials
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