//建立邮件消息,发送简单邮件和html邮件的区别
MimeMessage mailMessage = senderImpl.createMimeMessage();
MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage);
//设置收件人，寄件人
messageHelper.setTo("sun111@163.com");
messageHelper.setFrom("webadmin@163.com");
messageHelper.setSubject("测试HTML邮件！");
//true 表示启动HTML格式的邮件
messageHelper.setText("hello!!zhangjian
",true);
//发送邮件
senderImpl.send(mailMessage);