I’m using javamail package in raw format so far. I prefer to split all the communications (email, social media…) and run it as a spring REST API server. Here is the initial code snippet.
Take STS or Eclipse, Start a Spring Starter Project and follow the instructions given below.
Dependencies
Maven Dependencies are given below.
4.0.0
org.springframework.boot
spring-boot-starter-parent
2.1.8.RELEASE
org.grassfield
messenger
0.0.1-SNAPSHOT
messenger
MultiPlatformMessenger
1.8
UTF-8
UTF-8
org.springframework.boot
spring-boot-starter-mail
org.springframework.boot
spring-boot-starter-web
org.springframework.boot
spring-boot-starter-test
test
org.springframework.boot
spring-boot-maven-plugin
User.java
This is an entity class for the user.
package org.grassfield.msg;
import org.springframework.stereotype.Component;
/**
* The Class User.
* @author Murugapandian Ramaiah
* @version 1.0
*/
@Component
public class User {
private String email;
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
MailService.java
As the name implies this is the email sending service.
package org.grassfield.msg;
import java.io.UnsupportedEncodingException;
import java.net.InetAddress;
import javax.mail.MessagingException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;
@Service
public class MailService {
@Autowired
private JavaMailSender sender;
public void sendEmail (User user) {
SimpleMailMessage mail = new SimpleMailMessage();
mail.setFrom(user.getEmail());
mail.setTo(user.getEmail());
mail.setSubject("Testing Email Service");
mail.setText("Test email content");
this.sender.send(mail);
}
public void sendEmailWithAttachment(User user) throws MessagingException, UnsupportedEncodingException {
MimeMessage mimeMsg = this.sender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(mimeMsg, true);
helper.setFrom(new InternetAddress(user.getEmail(), user.getEmail()));
helper.setTo(user.getEmail());
helper.setSubject("Multipart email");
helper.setText("Content of this email");
this.sender.send(mimeMsg);
}
}
MailController.java
Here is the REST controller.
package org.grassfield.msg;
import java.io.UnsupportedEncodingException;
import javax.mail.MessagingException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* The Class MailController.
* @author Murugapandian Ramaiah
* @version 1.0
*/
@RestController
public class MailController {
/** The service. */
@Autowired
private MailService service;
/** The user. */
@Autowired
private User user;
@RequestMapping("test-plain-text-email")
public String testPlainTextEmail() {
user.setEmail("recipient@office365 email address");
service.sendEmail(user);
return "Email sent";
}
@RequestMapping("test-multipart-email")
public String testMultipartEmail() throws MessagingException, UnsupportedEncodingException {
user.setEmail("recipient@office365 email address");
service.sendEmailWithAttachment(user);
return "Email sent";
}
}
application.properties
spring.mail.host = smtp.office365.com spring.mail.username = user@office 365 account spring.mail.password = office 365 password spring.mail.port=587 spring.mail.properties.mail.smtp.port=587 spring.mail.properties.mail.transport.protocol=smtps spring.mail.properties.mail.smtp.auth = true spring.mail.properties.mail.smtp.starttls.enable=true spring.mail.properties.mail.smtp.starttls.required=true spring.mail.properties.mail.smtp.ssl.enable=false spring.mail.properties.mail.smtp.timeout=15000 spring.mail.properties.mail.smtp.connectiontimeout=15000 spring.mail.properties.mail.smtp.socketFactory.fallback = true spring.mail.properties.mail.mail.debug=true spring.mail.properties.mail.pop3.host=pop email address spring.mail.properties.mail.pop3.port=110 spring.mail.properties.mail.pop3.starttls.enable=true spring.mail.properties.mail.pop3.store=pop3s spring.mail.properties.pop.pop3.username=pop username spring.mail.properties.pop.pop3.password=pop password spring.mail.properties.pop.pop3.folder=INBOX
Test
Test your services with these.
curl -X GET -i http://localhost:8080/test-plain-text-email
curl -X GET -i http://localhost:8080/test-multipart-email
