在Node JS应用程序中找不到路由

Question

我正在构建node js购物车应用程序。我定义了运行应用程序所需的所有代码，但是当我使用命令提示符运行应用程序时，在控制台窗口中出现了以下错误。

route.use（'/ product'，require（'./ product'））; 未找到。

这是我的index.js代码。

'use strict';
var express = require('express');
var route = express.Router();
route.use('/product', require('./product'));
route.use('/vendor', require('./vendor'));
route.use('/cart', require('./cart'));
route.use('/index', require('./index'));
// route.use('/user', require('./user'))




/* GET home page. */
//router.get('/', function (req, res) {
   // res.render('index', { title: 'Express' });
//});

exports = module.exports = {
    route
};

这是我的app.js代码..

'use strict';
var debug = require('debug');
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var { User } = require('./db');
var session = require('express-session');
var passport = require('./passport');

var routes = require('./routes/api/index');
//var users = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

// uncomment after placing your favicon in /public
//app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/api', require('./routes/api').route);

//app.use('/', routes);
//app.use('/users', users);
app.use(session({
    secret: 'some very very secret thing',
    resave: false,
    saveUninitialized: true
}));

app.use(express.json());
app.use(express.urlencoded({ extended: true }));

app.use(passport.initialize());
app.use(passport.session());

app.post('/signup', (req, res) => {
    User.create({
        username: req.body.username,
        password: req.body.password
    }).then((user) => {
        if (user) {
            res.redirect('/signin.html');
        }
    }).catch((err) => res.send("ERROR CREATING USER"));
});

app.post('/signin', passport.authenticate('local', {
    failureRedirect: '/signin.html',
    // successRedirect: 'profile'
    successRedirect: '/index.html'
}));
// catch 404 and forward to error handler
app.use(function (req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
    app.use(function (err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {
            message: err.message,
            error: err
        });
    });
}

// production error handler
// no stacktraces leaked to user
app.use(function (err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
        message: err.message,
        error: {}
    });
});

app.set('port', process.env.PORT || 3000);

var server = app.listen(app.get('port'), function () {
    debug('Express server listening on port ' + server.address().port);
});

这是我运行应用程序时的屏幕截图。