此 demo 主要演示了 Spring Boot 如何整合邮件功能，包括发送简单文本邮件、HTML邮件（包括模板HTML邮件）、附件邮件、静态资源邮件。
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>spring-boot-demo-email</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>spring-boot-demo-email</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>com.xkcoding</groupId>
<artifactId>spring-boot-demo</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<!-- Spring Boot 邮件依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>cn.hutool</groupId>
<artifactId>hutool-all</artifactId>
</dependency>
<!-- Spring Boot 模板依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
</dependencies>
<build>
<finalName>spring-boot-demo-email</finalName>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>此处特别感谢 路神(@路小磊) 的开源工具集 Hutool ，此处邮箱使用 Hutool 提供的公共邮箱做为测试邮箱，请童鞋们不要违规使用。
spring:
mail:
host: smtp.yeah.net
port: 994
username: hutool@yeah.net
password: q1w2e3
protocol: smtp
test-connection: true
default-encoding: UTF-8
properties:
mail.smtp.auth: true
mail.smtp.starttls.enable: true
mail.smtp.starttls.required: true
mail.smtp.ssl.enable: true
mail.display.sendmail: xkcoding/**
* <p>
* 邮件接口
* </p>
*
* @package: com.xkcoding.email.service
* @description: 邮件接口
* @author: yangkai.shen
* @date: Created in 2018/11/21 11:16
* @copyright: Copyright (c) 2018
* @version: V1.0
* @modified: yangkai.shen
*/
public interface MailService {
/**
* 发送文本邮件
*
* @param to 收件人地址
* @param subject 邮件主题
* @param content 邮件内容
* @param cc 抄送地址
*/
void sendSimpleMail(String to, String subject, String content, String... cc);
/**
* 发送HTML邮件
*
* @param to 收件人地址
* @param subject 邮件主题
* @param content 邮件内容
* @param cc 抄送地址
* @throws MessagingException 邮件发送异常
*/
void sendHtmlMail(String to, String subject, String content, String... cc) throws MessagingException;
/**
* 发送带附件的邮件
*
* @param to 收件人地址
* @param subject 邮件主题
* @param content 邮件内容
* @param filePath 附件地址
* @param cc 抄送地址
* @throws MessagingException 邮件发送异常
*/
void sendAttachmentsMail(String to, String subject, String content, String filePath, String... cc) throws MessagingException;
/**
* 发送正文中有静态资源的邮件
*
* @param to 收件人地址
* @param subject 邮件主题
* @param content 邮件内容
* @param rscPath 静态资源地址
* @param rscId 静态资源id
* @param cc 抄送地址
* @throws MessagingException 邮件发送异常
*/
void sendResourceMail(String to, String subject, String content, String rscPath, String rscId, String... cc) throws MessagingException;
} /**
* <p>
* 邮件接口
* </p>
*
* @package: com.xkcoding.email.service.impl
* @description: 邮件接口
* @author: yangkai.shen
* @date: Created in 2018/11/21 13:49
* @copyright: Copyright (c) 2018
* @version: V1.0
* @modified: yangkai.shen
*/
@Service
public class MailServiceImpl implements MailService {
@Autowired
private JavaMailSender mailSender;
@Value("${spring.mail.username}")
private String from;
/**
* 发送文本邮件
*
* @param to 收件人地址
* @param subject 邮件主题
* @param content 邮件内容
* @param cc 抄送地址
*/
@Override
public void sendSimpleMail(String to, String subject, String content, String... cc) {
SimpleMailMessage message = new SimpleMailMessage();
message.setFrom(from);
message.setTo(to);
message.setSubject(subject);
message.setText(content);
if (ArrayUtil.isNotEmpty(cc)) {
message.setCc(cc);
}
mailSender.send(message);
}
/**
* 发送HTML邮件
*
* @param to 收件人地址
* @param subject 邮件主题
* @param content 邮件内容
* @param cc 抄送地址
* @throws MessagingException 邮件发送异常
*/
@Override
public void sendHtmlMail(String to, String subject, String content, String... cc) throws MessagingException {
MimeMessage message = mailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setFrom(from);
helper.setTo(to);
helper.setSubject(subject);
helper.setText(content, true);
if (ArrayUtil.isNotEmpty(cc)) {
helper.setCc(cc);
}
mailSender.send(message);
}
/**
* 发送带附件的邮件
*
* @param to 收件人地址
* @param subject 邮件主题
* @param content 邮件内容
* @param filePath 附件地址
* @param cc 抄送地址
* @throws MessagingException 邮件发送异常
*/
@Override
public void sendAttachmentsMail(String to, String subject, String content, String filePath, String... cc) throws MessagingException {
MimeMessage message = mailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setFrom(from);
helper.setTo(to);
helper.setSubject(subject);
helper.setText(content, true);
if (ArrayUtil.isNotEmpty(cc)) {
helper.setCc(cc);
}
FileSystemResource file = new FileSystemResource(new File(filePath));
String fileName = filePath.substring(filePath.lastIndexOf(File.separator));
helper.addAttachment(fileName, file);
mailSender.send(message);
}
/**
* 发送正文中有静态资源的邮件
*
* @param to 收件人地址
* @param subject 邮件主题
* @param content 邮件内容
* @param rscPath 静态资源地址
* @param rscId 静态资源id
* @param cc 抄送地址
* @throws MessagingException 邮件发送异常
*/
@Override
public void sendResourceMail(String to, String subject, String content, String rscPath, String rscId, String... cc) throws MessagingException {
MimeMessage message = mailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message, true);
helper.setFrom(from);
helper.setTo(to);
helper.setSubject(subject);
helper.setText(content, true);
if (ArrayUtil.isNotEmpty(cc)) {
helper.setCc(cc);
}
FileSystemResource res = new FileSystemResource(new File(rscPath));
helper.addInline(rscId, res);
mailSender.send(message);
}
}/**
* <p>
* 邮件测试
* </p>
*
* @package: com.xkcoding.email.service
* @description: 邮件测试
* @author: yangkai.shen
* @date: Created in 2018/11/21 13:49
* @copyright: Copyright (c) 2018
* @version: V1.0
* @modified: yangkai.shen
*/
public class MailServiceTest extends SpringBootDemoEmailApplicationTests {
@Autowired
private MailService mailService;
@Autowired
private TemplateEngine templateEngine;
/**
* 测试简单邮件
*/
@Test
public void sendSimpleMail() {
mailService.sendSimpleMail("237497819@qq.com", "这是一封简单邮件", "这是一封普通的SpringBoot测试邮件");
}
/**
* 测试HTML邮件
*
* @throws MessagingException 邮件异常
*/
@Test
public void sendHtmlMail() throws MessagingException {
Context context = new Context();
context.setVariable("project", "Spring Boot Demo");
context.setVariable("author", "yangkai.shen");
context.setVariable("url", "https://github.com/xkcoding/spring-boot-demo");
String emailTemplate = templateEngine.process("welcome", context);
mailService.sendHtmlMail("237497819@qq.com", "这是一封模板HTML邮件", emailTemplate);
}
/**
* 测试附件邮件
*
* @throws MessagingException 邮件异常
*/
@Test
public void sendAttachmentsMail() throws MessagingException {
URL resource = ResourceUtil.getResource("static/xkcoding.png");
mailService.sendAttachmentsMail("237497819@qq.com", "这是一封带附件的邮件", "邮件中有附件，请注意查收！", resource.getPath());
}
/**
* 测试静态资源邮件
*
* @throws MessagingException 邮件异常
*/
@Test
public void sendResourceMail() throws MessagingException {
String rscId = "xkcoding";
String content = "<html><body>这是带静态资源的邮件<br/><img src=\'cid:" + rscId + "\' ></body></html>";
URL resource = ResourceUtil.getResource("static/xkcoding.png");
mailService.sendResourceMail("237497819@qq.com", "这是一封带静态资源的邮件", content, resource.getPath(), rscId);
}
}此文件为邮件模板，位于 resources/templates 目录下
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>SpringBootDemo(入门SpringBoot的首选Demo)</title>
<style>
body {
text-align: center;
margin-left: auto;
margin-right: auto;
}
#welcome {
text-align: center;
}
</style>
</head>
<body>
<div id="welcome">
<h3>欢迎使用 <span th:text="${project}"></span> - Powered By <span th:text=" ${author}"></span></h3>
<span th:text="${url}"></span>
<div style="text-align: center; padding: 10px">
<a style="text-decoration: none;" href="#" th:href="@{${url}}" target="_bank">
<strong>spring-boot-demo，入门Spring Boot的首选Demo！:)</strong>
</a>
</div>
<div style="text-align: center; padding: 4px">
如果对你有帮助,请任意打赏
</div>
<div style="width: 100%;height: 100%;text-align: center;display: flex">
<div style="flex: 1;"></div>
<div style="display: flex;width: 400px;">
<div style="flex: 1;text-align: center;">
<div>
<img width="180px" height="180px" src="http://xkcoding.com/resources/wechat-reward-image.png">
</div>
<div>微信打赏</div>
</div>
<div style="flex: 1;text-align: center;">
<div><img width="180px" height="180px" src="http://xkcoding.com/resources/alipay-reward-image.png">
</div>
<div>支付宝打赏</div>
</div>
</div>
<div style="flex: 1;"></div>
</div>
</div>
</body>
</html>