SpringBoot JavaMailSender发送邮件功能(实例详解)

public class MailTest {
    @Autowired
    private JavaMailSender javaMailSender;
    @Autowired
    private TemplateEngine templateEngine;
    @Test
    public void sendSimpleMail() {
        SimpleMailMessage message = new SimpleMailMessage();    // 构建一个邮件对象
        message.setSubject("邮件主题:这是一封测试邮件");            // 设置邮件主题
        message.setFrom("xxx@qq.com");                    // 设置邮件发送者
        message.setTo("xxx@xx.cn");                 // 设置邮件接收者，可以有多个接收者
//        message.setCc("xx@xx.cn");               // 设置邮件抄送人，可以有多个抄送人
//        message.setBcc("xx@xx.cn");              // 设置隐秘抄送人，可以有多个
        message.setSentDate(new Date());                        // 设置邮件发送日期
        String mailMsg = "这是由Springboot发送的第一封简单测试邮件，发件人:xx-哈哈";
        message.setText(mailMsg);                               // 设置邮件的正文
        javaMailSender.send(message);                           // 发送邮件
    }

  @Test
    public void sendAttachFileMail() throws MessagingException {
        MimeMessage mimeMessage = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
        helper.setSubject("邮件主题:这是一封测试带附件的邮件");
        helper.setFrom("xx@qq.com");
        helper.setTo("xx@qq.com");
//        helper.setCc("xx@xx.cn");
//        helper.setBcc("xx@xx.cn");
        helper.setSentDate(new Date());
        helper.setText("这是由Springboot发送的第二封带附件的邮件，发件人:x-哈哈");
        File file = new File("/Users/xx/朱x/朱x.jpg");
        helper.addAttachment("xx.jpg", file);
        javaMailSender.send(mimeMessage);
    }

 @Test
    public void sendImgResMail() throws MessagingException {
        MimeMessage mimeMessage = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
        helper.setSubject("邮件主题:这是一封测试带图片资源的邮件");
        helper.setFrom("xx@qq.com");
        helper.setTo("xx@qq.com");
        helper.setSentDate(new Date());
        helper.setText("<p>hello 大家好，这是一封测试邮件，这封邮件包含两种图片，分别如下</p><p>第一张图片：</p><img src='cid:p01'/><p>第二张图片：</p><img src='cid:p02'/>", true);
        helper.addInline("p01", new FileSystemResource(new File("/Users/xx/朱x/xx.jpg")));
        helper.addInline("p02", new FileSystemResource(new File("/Users/zhupeng/xx/WechatIMG47.jpg")));
        javaMailSender.send(mimeMessage);
    }

    @Test
    public void sendFreemarkerMail() throws MessagingException, IOException, TemplateException {
        MimeMessage mimeMessage = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
        helper.setSubject("邮件主题:这是一封Freemarker渲染的邮件");
        helper.setFrom("xx@qq.com");
        helper.setTo("xx@qq.com");
        helper.setSentDate(new Date());
        // 构建 Freemarker 的基本配置
        Configuration configuration = new Configuration(Configuration.VERSION_2_3_0);
        configuration.setClassLoaderForTemplateLoading(MailTest.class.getClassLoader(), "templates");
        Template template = configuration.getTemplate("mail_freemarker.ftl");
        // 模板渲染，渲染的结果将被保存到 out 中 ，将out 中的 html 字符串发送即可
        StringWriter out = new StringWriter();
        template.process(new User(1001, "xx", 10000.00), out);
        helper.setText(out.toString(), true);
        javaMailSender.send(mimeMessage);
    }

  public void sendThymeleafMail() throws MessagingException {
        MimeMessage mimeMessage = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
        helper.setSubject("邮件主题:这是一封Thymeleaf渲染的邮件");
        helper.setFrom("xx@qq.com");
        helper.setTo("xx@qq.com");
        helper.setSentDate(new Date());
        File file = new File("/Users/xx/xx/xx.jpg");
        helper.addAttachment("xx.jpg", file);
        helper.setText("<p>hello 大家好，这是一封测试邮件，这封邮件包含一种图片，如下</p><p>第一张图片：</p><img src='cid:p01'/>", true);
        helper.addInline("p01", new FileSystemResource(new File("/Users/xx/朱x/朱x.jpg")));
        Context context = new Context();
        context.setVariable("userName", "朱xx");
        context.setVariable("num", "000001");
        context.setVariable("salary", "99999");
        String process = templateEngine.process("mail_thymeleaf.html", context);
        helper.setText(process, true);
        javaMailSender.send(mimeMessage);
    }