五.SpringBoot集成实例系列-邮件email文章列表

文章列表

本系列将通过实例分别实现Springboot集成mybatis(mysql),mail,mongodb,cassandra,scheduler,redis,kafka,shiro,websocket。
具体文章系列如下：
一.SpringBoot集成实例系列-xml型单数据源mybatis
二.SpringBoot集成实例系列-xml型多数据源mybatis
三.SpringBoot集成实例系列-注解型单数据源mybatis
四.SpringBoot集成实例系列-注解型多数据源mybatis
五.SpringBoot集成实例系列-邮件email
六.SpringBoot集成实例系列-单数据源mongodb
七.SpringBoot集成实例系列-多数据源mongodb
八.SpringBoot集成实例系列-缓存redis
九.SpringBoot集成实例系列-数据库cassandra
十.SpringBoot集成实例系列-定时任务scheduler
十一.SpringBoot集成实例系列-消息队列kafka
十二.SpringBoot集成实例系列-消息推送websocket

前几篇文章，小求带简单的实现了springBoot集成mybatis的实例。众所周知，Email在我们的生活和工作中发挥巨大作用，如应用需要邮箱验证、异常问题邮箱通知等。本篇文件我们将通过实例介绍springboot集成email。

1.需求

实例需要实现email发送普通文本、附件和图片资源等功能。

2.技术要点

2.1 pom关键依赖

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/com.sun.mail/javax.mail -->
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
</dependency>

<!-- 模板引擎 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

2.2 配置文件

#SMTP server host. For instance `smtp.example.com`
spring.mail.host=smtp.163.com
#Login user of the SMTP server
spring.mail.username=email_test_123@163.com
#Login password of the SMTP server
#此处为客户端授权密码EMAIL123
spring.mail.password=EMAIL123
#Default MimeMessage encoding
spring.mail.default-encoding=UTF-8

springboot配置详情见本人博客：http://blog.csdn.net/a123demi/article/details/73917802
客户端授权密码设置：

2.3 关键实现

JavaMailSender:
用于JavaMail的扩展MailSender接口，支持MIME消息作为直接参数和准备回调。通常与MimeMessageHelper类一起使用，方便创建JavaMail MimeMessages，包括附件等。



SimpleMailMessage:支持普通文本消息
MimeMessage:支持Mime类消息，与MimeMessageHelper一起使用

3.代码实现

3.1 项目结构

3.2 邮件接口

package com.lm.service;

public interface MailService {
/**
* 发送普通邮件
* @param to
* @param subject
* @param content
*/
public void sendSimpleMail(String to, String subject, String content);

/**
* 发送html格式邮件
* @param to
* @param subject
* @param content
*/
public void sendHtmlMail(String to, String subject, String content);

/**
* 发送带附件邮件
* @param to
* @param subject
* @param content
* @param filePath
*/
public void sendAttachmentsMail(String to, String subject, String content, String filePath);

/**
* 发送正文中有静态资源（图片）的邮件
* @param to
* @param subject
* @param content
* @param rscPath
* @param rscId
*/
public void sendInlineResourceMail(String to, String subject, String content, String rscPath, String rscId);
}

3.3 邮件接口实现

package com.lm.service.impl;

import java.io.File;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;

import com.lm.service.MailService;

/**
* 邮件实现类
* @author liangming.deng
* @date   2017年7月29日
*
*/
@Component
public class MailServiceImpl implements MailService{

private final Logger logger = LoggerFactory.getLogger(this.getClass());

@Value("${mail.fromMail.addr}")
private String from;

@Autowired
private JavaMailSender mailSender;

/**
* 发送文本邮件
* @param to
* @param subject
* @param content
*/
@Override
public void sendSimpleMail(String to, String subject, String content) {
SimpleMailMessage message = new SimpleMailMessage();
message.setFrom(from);
message.setTo(to);
message.setSubject(subject);
message.setText(content);

try {
mailSender.send(message);
logger.info("简单邮件已经发送。");
} catch (Exception e) {
logger.error("发送简单邮件时发生异常！", e);
}

}

/**
* 发送html邮件
* @param to
* @param subject
* @param content
*/
@Override
public void sendHtmlMail(String to, String subject, String content) {
MimeMessage message = mailSender.createMimeMessage();

try {
//true表示需要创建一个multipart message
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setFrom(from);
helper.setTo(to);
helper.setSubject(subject);
helper.setText(content, true);

mailSender.send(message);
logger.info("html邮件发送成功");
} catch (MessagingException e) {
logger.error("发送html邮件时发生异常！", e);
}
}

/**
* 发送带附件的邮件
* @param to
* @param subject
* @param content
* @param filePath
*/
public void sendAttachmentsMail(String to, String subject, String content, String filePath){
MimeMessage message = mailSender.createMimeMessage();

try {
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setFrom(from);
helper.setTo(to);
helper.setSubject(subject);
helper.setText(content, true);

FileSystemResource file = new FileSystemResource(new File(filePath));
String fileName = filePath.substring(filePath.lastIndexOf(File.separator));
helper.addAttachment(fileName, file);
//helper.addAttachment("test"+fileName, file);

mailSender.send(message);
logger.info("带附件的邮件已经发送。");
} catch (MessagingException e) {
logger.error("发送带附件的邮件时发生异常！", e);
}
}

/**
* 发送正文中有静态资源（图片）的邮件
* @param to
* @param subject
* @param content
* @param rscPath
* @param rscId
*/
public void sendInlineResourceMail(String to, String subject, String content, String rscPath, String rscId){
MimeMessage message = mailSender.createMimeMessage();

try {
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setFrom(from);
helper.setTo(to);
helper.setSubject(subject);
helper.setText(content, true);

FileSystemResource res = new FileSystemResource(new File(rscPath));
helper.addInline(rscId, res);

mailSender.send(message);
logger.info("嵌入静态资源的邮件已经发送。");
} catch (MessagingException e) {
logger.error("发送嵌入静态资源的邮件时发生异常！", e);
}
}
}

3.4 测试用例

package com.lm;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import com.lm.service.MailService;

/**
*
* @author liangming.deng
* @date   2017年7月29日
*
*/
@RunWith(SpringRunner.class)
@SpringBootTest
public class MailServiceTest {

@Autowired
private MailService mailService;

@Autowired
private TemplateEngine templateEngine;

@Test
public void testSimpleMail() throws Exception {
mailService.sendSimpleMail("email_test_123@163.com","test simple mail"," hello this is simple mail");
}

@Test
public void testHtmlMail() throws Exception {
String content="<html>\n" +
"<body>\n" +
"    <h3>hello world ! 这是一封html邮件!</h3>\n" +
"</body>\n" +
"</html>";
mailService.sendHtmlMail("email_test_123@163.com","test simple mail",content);
}

@Test
public void sendAttachmentsMail() {
String filePath="d:\\tmp\\iot-springboot.log";
mailService.sendAttachmentsMail("email_test_123@163.com", "主题：带附件的邮件", "有附件，请查收！", filePath);
}

@Test
public void sendInlineResourceMail() {
String rscId = "test006";
String content="<html><body>这是有图片的邮件：<img src=\'cid:" + rscId + "\' ></body></html>";
String imgPath = "D:\\01.jpg";

mailService.sendInlineResourceMail("email_test_123@163.com", "主题：这是有图片的邮件", content, imgPath, rscId);
}

@Test
public void sendTemplateMail() {
//创建邮件正文
Context context = new Context();
context.setVariable("id", "006");
String emailContent = templateEngine.process("emailTemplate", context);

mailService.sendHtmlMail("email_test_123@163.com","主题：这是模板邮件",emailContent);
}
}

3.5 实现效果

4.代码地址

Github:
https://github.com/a123demi/spring-boot-integration