JavaMailSender根据数据库获取主机端口，而不是通过自动注入yml配置文件

JavaMailSenderImpl javaMailSender =new JavaMailSenderImpl();

javaMailSender.setHost(host);//主机地址

javaMailSender.setPort(port);//端口

javaMailSender.setUsername();//账号

javaMailSender.setPassword();//密码

MimeMessage mimeMessage =  javaMailSender.createMimeMessage();

MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage,true);

mimeMessageHelper .setFrom(xxxx.qq.com);//发件人

mimeMessageHelper .setTo(xxxx.qq.com);//收件人

mimeMessageHelper .setSubject(xxx);//邮件主题

mimeMessageHelper .setText(xxxx);//邮件内容

javaMailSender.send(mimeMessage );