We will create a simple Spring service that will be used for sending mail. One method will create a SimpleMailMessage on the spot, while the other will use a preconfigured default message. The source code for the service is the following:
package com.javacodegeeks.spring.mail;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.stereotype.Service;
@Service("mailService")
public class MailService {
@Autowired
private MailSender mailSender;
@Autowired
private SimpleMailMessage alertMailMessage;
public void sendMail(String from, String to, String subject, String body) {
SimpleMailMessage message = new SimpleMailMessage();
message.setFrom(from);
message.setTo(to);
message.setSubject(subject);
message.setText(body);
mailSender.send(message);
}
public void sendAlertMail(String alert) {
SimpleMailMessage mailMessage = new SimpleMailMessage(alertMailMessage);
mailMessage.setText(alert);
mailSender.send(mailMessage);
}
}
The corresponding Spring XML file that bootstraps the container is the following:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd"
>
<context:component-scan base-package="com.javacodegeeks.spring.mail" />
<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
<property name="host" value="smtp.gmail.com"/>
<property name="port" value="25"/>
<property name="username" value="myusername@gmail.com"/>
<property name="password" value="mypassword"/>
<property name="javaMailProperties">
<props>
<!-- Use SMTP transport protocol -->
<prop key="mail.transport.protocol">smtp</prop>
<!-- Use SMTP-AUTH to authenticate to SMTP server -->
<prop key="mail.smtp.auth">true</prop>
<!-- Use TLS to encrypt communication with SMTP server -->
<prop key="mail.smtp.starttls.enable">true</prop>
<prop key="mail.debug">true</prop>
</props>
</property>
</bean>
<bean id="alertMailMessage" class="org.springframework.mail.SimpleMailMessage">
<property name="from">
<value>myusername@gmail.com</value>
</property>
<property name="to">
<value>myusername@gmail.com</value>
</property>
<property name="subject" value="Alert - Exception occurred. Please investigate"/>
</bean>
</beans>In case you wish to use Gmail’s SMTP server, make sure that the following JavaMail properties are configured appropriately:
host=smtp.gmail.com port=25 username=your-gmail-username password=your-gmail-password mail.transport.protocol=smtp mail.smtp.auth=true mail.smtp.starttls.enable=true
Finally, we create a class that will be used to create the Spring container and test the simple mail service we created. The source code is the following:
package com.javacodegeeks.spring.mail;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
public class MailServiceTest {
public static void main(String[] args) {
ApplicationContext context = new FileSystemXmlApplicationContext("conf/spring.xml");
MailService mailService = (MailService) context.getBean("mailService");
mailService.sendMail("myusername@gmail.com", "myusername@gmail.com", "Testing123", "Testing only nn Hello Spring Email Sender");
mailService.sendAlertMail("Exception occurred");
}
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