node. JS express connect mysql write webapi Foundation

newly build

Use webstorm newly build

Cross domain

Be careful app and router, Corresponding module.exports = app; module.exports = router;
stay app.js or index.js Medium plus

Kulian

Port default 3306, In case of modification creatConnection Add port that will do

Interface

var url = require(‘url’);

They correspond to each other ： Request method , front end query Parameters , Database execution SQL sentence , Return results
front end data data
var data = req.body
In this case .format For custom methods ,javascript Provides more convenient string templates, such as ：

var id = 1
var sql = `SELECT * FROM table1 WHERE id='${
      id}'`