//导入加密模块
const crypto = require("crypto");

<div class="col-md-6">
  <h4>用户注册</h4>
  <form role="form" method="post" action="/regest">
    <div class="form-group">
      <label for="username">用户名:</label>
      <input id="username" type="text" placeholder="请输入用户名" name="username" class="form-control"/>
    </div>
    <div class="form-group">
      <label for="password">密码:</label>
      <input id="password" type="password" placeholder="请输入密码" name="password" class="form-control"/>
    </div>
    <div class="form-group">
      <input type="submit" value="提交" class="btn btn-success"/>
    </div>
  </form>
</div>

router.post("/regest",(req,res)=>{
  console.log(req.body);
  let name = req.body.username;
  let password = req.body.password;
  let md5 = crypto.createHash("md5");
  let newPas = md5.update(password).digest("hex");
  db("insert into user1(name,password) values(",[name,newPas],(err,data)=>{
    if (err){
      res.send("注册失败");
    }
    console.log(data);
    if (data){
      res.send("注册成功");
    }
  })
});

router.post("/login",(req,res)=>{
  let name = req.body.username;
  let password = req.body.password;
  let md5 = crypto.createHash("md5");
  let newPas = md5.update(password).digest("hex");
  db("select * from user1 where name = ",[name],(err,data)=>{
    console.log(data[0].password);
    if (err){
      res.send("发生错误");
    }
    if (data){
      if (data[0].password === newPas){
        res.send("登录成功");
      }else {
        res.send("用户名或密码错误");
      }
    }
  })
})

<div class="col-md-6">
  <h4>用户登录</h4>
  <form role="form" method="post" action="/login">
    <div class="form-group">
      <label for="username2">用户名:</label>
      <input id="username2" type="text" placeholder="请输入用户名" name="username" class="form-control"/>
    </div>
    <div class="form-group">
      <label for="password">密码:</label>
      <input id="password" type="password" placeholder="请输入密码" name="password" class="form-control"/>
    </div>
    <div class="form-group">
      <input type="submit" value="提交" class="btn btn-success" id="sub-btn2"/>
    </div>
  </form>
</div>