nodejs与mongodb建立连接

1.首先启动数据库服务器

http://blog.csdn.net/liusong0605/article/details/10574863

2.编写代码

var mongo = require('mongodb');
var host = "localhost";
var port = 27017;
var server = new mongo.Server(host,port,{auto_reconnect:true});
var db = new mongo.Db('db',server,{safe:true});
db.open(function (err,db) {
    if(err) throw err;
    else {
        console.log('成功建立数据库连接');
        db.close();
    }
});