old_contents: var express = require("express");
  var router = express.Router();
  var nodemailer = require("nodemailer");
  
  var multer = require("multer");
  var storage = multer.diskStorage({
    destination: function(req, file, cb) {
      cb(null, "./public/files");
    },
    filename: function(req, file, cb) {
      var nameArr = file.originalname.split(".");
      cb(null, `${nameArr[0]}${Date.now()}.${nameArr[1]}`);
    }
  });
  var upload = multer({
    storage: storage
  });
  
  var transporter = nodemailer.createTransport({
    host: "smtp.qq.com", // 主机
    secureConnection: true, // 使用 SSL
    port: 465, // SMTP 端口
    auth: {
      user: "549300687@qq.com",
      pass: "ztlzdrivyevxbecc"
    }
  });
  
  router.get("/", function(req, res) {
    var dateObj = new Date();
    res.render("index");
  });
  
  router.post(
    "/post",
    upload.fields([{ name: "file", maxCount: 1 }]),
    function(req, res) {
      var body = req.body;
      var html = `<p>${body.name}  ${body.stuNum}</p><p>手机: ${body.phone}</p><p>email: ${body.email}</p><p>个人简介： ${body.introduction}</p><p>有趣的事： ${body.experience}</p>`;
      var mailOptions = {
        from: "549300687@qq.com",
        to: "zym@betahouse.us",
        subject: `${body.name}  ${body.stuNum}`,
        html: html
      };
      transporter.sendMail(mailOptions, function(error, info) {
        if (error) {
          console.log(error);
          res.status(500).send({ message: "提交失败，请重试😔" });
        } else {
          console.log("Message sent: " + info.response);
          res.status(200).send({ message: "提交成功，我们会尽快回复，届时请留意短信和邮件😜" });
        }
      });
    }
  );
  
  module.exports = router;
  
new_contents: var express = require("express");
  var router = express.Router();
  var nodemailer = require("nodemailer");
  
  var multer = require("multer");
  var storage = multer.diskStorage({
    destination: function(req, file, cb) {
      cb(null, "./public/files");
    },
    filename: function(req, file, cb) {
      var nameArr = file.originalname.split(".");
      cb(null, `${nameArr[0]}${Date.now()}.${nameArr[1]}`);
    }
  });
  var upload = multer({
    storage: storage
  });
  
  var transporter = nodemailer.createTransport({
    host: "smtp.qq.com", // 主机
    secureConnection: true, // 使用 SSL
    port: 465, // SMTP 端口
    auth: {
      user: "498291117@qq.com",
      pass: "jspavjrexbdobjjd"
    }
  });
  
  router.get("/", function(req, res) {
    var dateObj = new Date();
    res.render("index");
  });
  
  router.post(
    "/post",
    upload.fields([{ name: "file", maxCount: 1 }]),
    function(req, res) {
      var body = req.body;
      var html = `<p>${body.name}  ${body.stuNum}</p><p>手机: ${body.phone}</p><p>email: ${body.email}</p><p>个人简介： ${body.introduction}</p><p>有趣的事： ${body.experience}</p>`;
      var mailOptions = {
        from: "498291117@qq.com",
        to: "zym@betahouse.us",
        subject: `${body.name}  ${body.stuNum}`,
        html: html
      };
      transporter.sendMail(mailOptions, function(error, info) {
        if (error) {
          console.log(error);
          res.status(500).send({ message: "提交失败，请重试😔" });
        } else {
          console.log("Message sent: " + info.response);
          res.status(200).send({ message: "提交成功，我们会尽快回复，届时请留意短信和邮件😜" });
        }
      });
    }
  );
  
  module.exports = router;
  
subject: change email