小编Kar*_*Haj的帖子

我是nodeJS的新手,通过关注youtube上的预告片开始学习,一切顺利,直到我添加连接功能,如果是mongodb,

mongo.connect("mongodb://localhost:27017/mydb")

当我在cmd(node start-app)上运行我的代码时,得到以下错误,

MongoNetworkError: failed to connect to server [localhost:27017] on first connect [MongoNetworkError: connect ECONNREFUSED 127.0.0.1:27017]

有人能解释我错过了哪一步吗？我的代码:

var express = require("express");
var MongoClient = require('mongodb');
var url = "mongodb://localhost:27017/mydb";
var webService = require("./webService");
var server = express();

MongoClient.connect(url, function (err, db) {
    if (err) throw err;
    console.log("Database created!");
    db.close();
});

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

server.set('views', __dirname);

server.get('/', function (request, response) {
    response.sendFile(__dirname + '/MainPage.html');
});

server.get('/Sign', function (request, response) {
    response.render(__dirname + '/Sign.ejs');
});

server.post("/signUp", webService.signUp);

server.post("/createUser", webService.createUser); …