Node.js 连接 mongodb 教程

新建一个文件夹存放我们的js文件
1.package.json
使用mongodb

{
  "name": "test",
  "version": "0.0.1",
  "private": true,
  "scripts": {
  "start": "node app.js"
  },
  "dependencies": {
  "mongodb":"1.4.7"
  }
}

2.创建文件mongo.js

var MongoClient = require('mongodb').MongoClient;
var db;
var connected = false;
module.exports = {
  connect: function(url, callback){
  MongoClient.connect(url, function(err, _db){
    if (err) { throw new Error('Could not connect: '+err); }
    db = _db;
    connected = true;
    callback(db);
    });
  },
  collection: function(name){
    if (!connected) {
    throw new Error('Must connect to Mongo before calling "collection"');
    }
    return db.collection(name);
  }
};

3.创建app.js

var mongo = require('./mongo');
var mongoUrl = "mongodb://localhost:27017/test";
mongo.connect(mongoUrl, function(){
console.log('Connected to mongo at: ' + mongoUrl);
var coll = mongo.collection('users');
var userObject = {
  username: "admin",
  password: "admin"
};
// create the new user
coll.insert(userObject, function(err,user){
  console.log("created user");
});
coll.find().toArray(function(err, results) {
  console.dir(results);
  });
});

 
源码下载:https://github.com/shengoo/mongotest
效果如下:
mongodb test
 

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