node和数据库建立连接

var express = require('express')
  , app = express();
var querystring = require('querystring');
var util = require('util');
var mysql  = require('mysql');
var connection = mysql.createConnection({
  host     : 'localhost',
  user     : 'root',
  password : '123456',
  // port: '3306',
  database: 'test',  //数据库名称
}); 

connection.connect();