总是在下一个函数后发送错误页

我坐4.16.3快车。

首先,此代码工作正常:

const express = require('express')
const router = express.Router()

let app = express()

router.use((req, res, next) => {
    console.log('hi, express')
    next()
})

app.use(router)

app.all('*', (req, res) => {
    res.send("hello, world")
})

app.listen(8075, function () {
  console.log('listening localhost:8072')
})

但当我试图设置参数时 next() :

const express = require('express')
const router = express.Router()

let app = express()

router.use((req, res, next) => {
  next('hello, express')       ----------------mark
})

app.use(router)

app.all('*', (msg, req, res) => {
    console.log(msg)
    res.send(msg)
})

app.listen(8075, function () {
  console.log('listening localhost:8072')
})

响应始终是错误页:

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Error</title>
    </head>
    <body>
        <pre>hello, express</pre>
    </body>
</html>

我只是在下一个函数中添加了一个参数,但它似乎已损坏了Express路由器。

对参数使用next()的正确方法是什么?