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Common-Email Service
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‎.gitignore

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*.iml
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.idea/*
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target/*

‎README.md

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This demo uses spring-boot and spring mail to send emails. For testing purpose I used greenmail.
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To run this application, please visit src/main/resources/application.properties and change email.sender.username, email.sender.password to your credentials.
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Running the EmailApplication.java will start this application in http://localhost:8080
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For a simple test purpose i have added /testSendEmail to send out email. You can change the toAddress to see real email in SendEmailController.
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Note : Gmail will not allow using its smtp from less secured apps. You might need to switch off that feature while testing to send email.
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In gmail, my account goto Sign-in & Security --> Connected apps & sites --> Allow less secure apps: turn it on

‎pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>common-email</artifactId>
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<groupId>email</groupId>
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<version>1.0</version>
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<packaging>jar</packaging>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-mail</artifactId>
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<version>1.5.3.RELEASE</version>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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<version>1.5.3.RELEASE</version>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<version>1.5.3.RELEASE</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>com.icegreen</groupId>
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<artifactId>greenmail</artifactId>
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<version>1.5.5</version>
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</dependency>
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</dependencies>
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<build>
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<resources>
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<resource>
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<directory>src/main/resources</directory>
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<filtering>true</filtering>
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<includes>
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<include>application.properties</include>
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</includes>
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</resource>
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</resources>
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</build>
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</project>

‎src/main/java/org/common/email/EmailApplication.java

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package org.common.email;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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/**
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* Created by abburi on 6/18/17.
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*/
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@SpringBootApplication
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public class EmailApplication {
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public static void main(String[] args){
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SpringApplication.run(EmailApplication.class, args);
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}
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}

‎src/main/java/org/common/email/EmailSenderConfig.java

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package org.common.email;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.mail.javamail.JavaMailSender;
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import org.springframework.mail.javamail.JavaMailSenderImpl;
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import java.util.Properties;
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/**
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* Created by abburi on 6/10/17.
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*/
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@Configuration
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public class EmailSenderConfig {
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@Value("${email.sender.host}")
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private String host;
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@Value("${email.sender.port}")
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private String port;
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@Value("${email.sender.username}")
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private String username;
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@Value("${email.sender.password}")
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private String password;
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@Value("${email.transport.protocol}")
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private String protocol;
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@Value("${email.smtp.auth}")
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private String auth;
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@Value("${email.smtp.starttls.enable}")
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private String ttlsEnable;
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@Value("${email.debug}")
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private String debug;
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@Bean
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public JavaMailSender getJavaMailSender(){
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JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
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mailSender.setHost(host);
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mailSender.setPort(Integer.valueOf(port));
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mailSender.setUsername(username);
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mailSender.setPassword(password);
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mailSender.setJavaMailProperties(getMailSenderProperties());
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return mailSender;
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}
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private Properties getMailSenderProperties(){
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Properties props = new Properties();
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props.put("mail.transport.protocol", protocol);
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props.put("mail.smtp.auth", auth);
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props.put("mail.smtp.starttls.enable", ttlsEnable);
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props.put("mail.debug", debug);
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return props;
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}
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}

‎src/main/java/org/common/email/controller/SendEmailController.java

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package org.common.email.controller;
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import org.common.email.service.EmailService;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestMethod;
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import org.springframework.web.bind.annotation.RestController;
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import javax.mail.MessagingException;
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/**
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* Created by abburi on 6/18/17.
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*/
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@RestController
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public class SendEmailController {
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@Autowired
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private EmailService emailService;
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@RequestMapping(value = "/testSendEmail" , method = RequestMethod.GET)
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public void sendEmail(){
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try {
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emailService.sendMail("[email protected]", "Test Subject", "TestMessage");
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} catch (MessagingException e) {
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e.printStackTrace();
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}
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}
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}

‎src/main/java/org/common/email/service/EmailService.java

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package org.common.email.service;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.core.io.FileSystemResource;
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import org.springframework.mail.MailMessage;
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import org.springframework.mail.SimpleMailMessage;
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import org.springframework.mail.javamail.JavaMailSender;
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import org.springframework.mail.javamail.MimeMailMessage;
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import org.springframework.mail.javamail.MimeMessageHelper;
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import org.springframework.stereotype.Service;
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import javax.mail.MessagingException;
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import javax.mail.internet.MimeMessage;
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import java.io.File;
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/**
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* Created by abburi on 6/10/17.
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*/
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@Service
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public class EmailService {
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@Autowired
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private JavaMailSender javaMailSender;
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@Value("${email.from.addres}")
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private String fromAddress;
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public void sendMailMultipart(String toEmail, String subject, String message, File file) throws MessagingException {
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MimeMessage mimeMessage = javaMailSender.createMimeMessage();
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MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
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helper.setFrom(fromAddress);
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helper.setTo(toEmail);
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helper.setSubject(subject);
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helper.setText(message);
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if(file != null){
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helper.addAttachment(file.getName(), file);
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}
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javaMailSender.send(mimeMessage);
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}
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public void sendMail(String toEmail, String subject, String message) throws MessagingException {
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sendMailMultipart(toEmail, subject, message, null);
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}
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public void sendMail(String toEmail, String subject, String message, File file) throws MessagingException {
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sendMailMultipart(toEmail, subject, message, file);
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}
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}

‎src/main/resources/application.properties

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email.sender.host=smtp.gmail.com
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email.sender.port=587
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email.sender.username=yourgmailemail
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email.sender.password=yourgmailpassword
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email.transport.protocol=smtp
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email.smtp.auth=true
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email.smtp.starttls.enable=true
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email.debug=false
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email.from.addres[email protected]

‎src/test/java/org/common/email/EmailServiceTest.java

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package org.common.email;
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import com.icegreen.greenmail.util.GreenMail;
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import com.icegreen.greenmail.util.GreenMailUtil;
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import com.icegreen.greenmail.util.ServerSetupTest;
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import org.common.email.service.EmailService;
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import org.junit.Assert;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit4.SpringRunner;
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import javax.mail.BodyPart;
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import javax.mail.Message;
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import javax.mail.MessagingException;
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import javax.mail.Multipart;
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import java.io.File;
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import java.io.IOException;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertThat;
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import static org.junit.Assert.assertTrue;
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/**
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* Created by abburi on 6/10/17.
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*/
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@RunWith(SpringRunner.class)
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@SpringBootTest(classes = {EmailSenderConfig.class, EmailService.class})
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public class EmailServiceTest {
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@Autowired
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private EmailService emailService;
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private GreenMail testSmtp;
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@Test
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public void testEmail() throws MessagingException, IOException {
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testSmtp = new GreenMail(ServerSetupTest.SMTP);
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testSmtp.start();
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emailService.sendMail("[email protected]", "Test Subject", "Test mail");
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testSmtp.waitForIncomingEmail(1);
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Message[] messages = testSmtp.getReceivedMessages();
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Assert.assertTrue(messages.length == 1);
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String message = messages[0].getSubject();
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Multipart part = (Multipart) messages[0].getContent();
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assertEquals(part.getCount(), 1);
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assertEquals("Test Subject", message);
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String body = GreenMailUtil.getBody(messages[0]).replaceAll("=\r?\n", "");
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assertTrue(body.contains("Test mail"));
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testSmtp.stop();
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}
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@Test
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public void testEmailWithFile() throws MessagingException, IOException {
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testSmtp = new GreenMail(ServerSetupTest.SMTP);
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testSmtp.start();
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File file = new File(this.getClass().getClassLoader().getResource("TestFile.txt").getFile());
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emailService.sendMail("[email protected]", "Test Subject", "Test mail", file);
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testSmtp.waitForIncomingEmail(1);
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Message[] messages = testSmtp.getReceivedMessages();
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Assert.assertTrue(messages.length == 1);
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String message = messages[0].getSubject();
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assertEquals("Test Subject", message);
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String body = GreenMailUtil.getBody(messages[0]).replaceAll("=\r?\n", "");
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assertTrue(body.contains("Test mail"));
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Multipart part = (Multipart) messages[0].getContent();
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assertEquals(part.getCount(), 2);
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BodyPart bodyPart = part.getBodyPart(1);
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assertEquals(bodyPart.getFileName(), "TestFile.txt");
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assertEquals(bodyPart.getContent().toString(), "Testing file to be sent as email attachment");
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testSmtp.stop();
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}
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}

‎src/test/resources/TestFile.txt

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Testing file to be sent as email attachment

‎src/test/resources/application.properties

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email.sender.host=localhost
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email.sender.port=3025
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email.sender.username=no
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email.sender.password=no
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email.transport.protocol=smtp
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email.smtp.auth=false
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email.smtp.starttls.enable=false
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email.debug=true
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email.from.addres[email protected]

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