在很多业务中都存在着发送邮件的功能，邮件在国内不是经常使用但是在国外非常常用，废话少说，上代码！

首先先得开通smtp功能

进入qq邮箱>设置>账户>开启

获取授权码(待会要用)

pom文件添加依赖

 <dependency>     <groupId>org.springframework.bootgroupId>     <artifactId>spring-boot-starter-mailartifactId> dependency>

properties配置

#配置邮件消息spring.mail.host=smtp.qq.com#发送邮件者信箱spring.mail.username=发件人邮箱     例如：12456789@qq.com#这里不是邮箱的登录密码，而是开启PO3/SMTP服务时邮箱的授权码spring.mail.password=获取到的授权码值spring.mail.default-encoding=UTF-8spring.mail.port=587   #发邮件的端口spring.mail.properties.mail.smtp.socketFactory.class=javax.net.ssl.SSLSocketFactoryspring.mail.properties.mail.debug=true

controller层

 @Autowired     private JavaMailSender javaMailSender;     //普通邮件发送     private  void sendMail(String QQ邮箱,String title,String text){         SimpleMailMessage message = new SimpleMailMessage();         message.setFrom("1007085520@qq.com");         message.setTo(QQ邮箱);         message.setSubject(title);         message.setText(text);         javaMailSender.send(message);     }     html邮件  MimeMessage mimeMessage = javaMailSender.createMimeMessage();             MimeMessageHelper messageHelper = new MimeMessageHelper(mimeMessage);             messageHelper.setSubject(title);             messageHelper.setFrom("1007085520@qq.com");             messageHelper.setTo(QQ);             messageHelper.setText(text, true);             javaMailSender.send(messageHelper.getMimeMessage());   附件邮件  MimeMessage message = javaMailSender.createMimeMessage();         try {             MimeMessageHelper helper = new MimeMessageHelper(message, true);             helper.setFrom("1007085520@qq.com");             helper.setTo("1007085520@qq.com");             helper.setSubject("辩题");             helper.setText("内容");             helper.addAttachment("南方原油.xls", new File("./策划.xls"));         } catch (Exception e) {             e.printStackTrace();         }         javaMailSender.send(message);

完结撒花如果不使用上面的端口  默认会使用25端口，本地测试不会出现问题，但是部署到阿里云服务器就会出问题(阿里云默认禁止25端口)