nodejs之连接数据库

在工程的目录中创建settings.js文件（保存数据库的连接信息）

module.exports = {
    cookieSecret: ‘microblogbyvoid‘,
    db:‘microblog‘,
    host:‘localhost‘,
}

在models子目录中创建db.js

var settings = require(‘../settings‘);
var Db = require(‘mongodb‘).Db;
var Connection = require(‘mongodb‘).Connection;
var Server = require(‘mongodb‘).Server;
module.exports = new Db(settings.db,new Server(settings.host, Connection.DEFAULT_PORT, {}));