Express implements front-end and back-end communication to upload pictures to the storage database (mysql) fool-proof tutorial (2)_javascript skills

[mysqld]
basedir="D:/MySql" 
datadir="D:/MySql/data" 
port = 3306
socket = "/tmp/mysql.sock"
[client] 
password = 
port = 3306
socket = "/tmp/mysql.sock"
default-character-set = utf8 

mysqld -install

net start mysql

mysql -uroot -p

npm install mysql

var express = require('express');
var router = express.Router();var mysql = require('mysql'); //调用MySQL模块
router.get('/', function(req, res) {
 res.render('index', {
 title: '孟星魂'
 });
 //创建一个connection
 var connection = mysql.createConnection({
 host: '127.0.0.1', //主机
 user: 'root', //MySQL认证用户名
 password: '111', //MySQL认证用户密码，没有测试没有密码时为空是否能登陆，不能的话设置下登陆密码
 port: '3306', //端口号
 database: 'nodesample'
 });
 //创建一个connection
 connection.connect(function(err) {
 if (err) {
 console.log('[query] - :' + err);
 return;
 }
 console.log('[connection connect] succeed!');
 });
 //执行SQL语句
 connection.query('SELECT 1 + 1 AS solution', function(err, rows, fields) {
 if (err) {
 console.log('[query] - :' + err);
 return;
 }
 console.log('The solution is: ', rows[0].solution);
 });
 //关闭connection
 connection.end(function(err) {
 if (err) {
 return;
 }
 console.log('[connection end] succeed!');
 });
});
module.exports = router;

CREATE DATABASE IF NOT EXISTS nodesample CHARACTER SET UTF8;
USE nodesample;
SET FOREIGN_KEY_CHECKS=0;
DROP TABLE IF EXISTS `userinfo`;
CREATE TABLE `userinfo` (
 `Id` int(11) NOT NULL AUTO_INCREMENT COMMENT '主键',
 `UserName` varchar(64) NOT NULL COMMENT '用户名',
 `UserPass` varchar(64) NOT NULL COMMENT '用户密码',
 PRIMARY KEY (`Id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='用户信息表';

var express = require('express');
var router = express.Router();
var mysql = require('mysql'); //调用MySQL模块
router.get('/', function(req, res) {
 res.render('index', {
 title: '孟星魂'
 });
 //创建一个connection
 var connection = mysql.createConnection({
 host: '127.0.0.1', //主机
 user: 'root', //MySQL认证用户名
 password: '111', //MySQL认证用户密码
 port: '3306', //端口号
 database: 'nodesample'
 });
 //创建一个connection
 connection.connect(function(err) {
 if (err) {
 console.log('[query] - :' + err);
 return;
 }
 console.log('[connection connect] succeed!');
 });
 //执行SQL语句
 var userAddSql = 'INSERT INTO userinfo(Id,UserName,UserPass) VALUES(0,?,?)';
 var userAddSql_Params = ['Wilson', 'abcd'];
 //增
 connection.query(userAddSql, userAddSql_Params, function(err, result) {
 if (err) {
 console.log('[INSERT ERROR] - ', err.message);
 return;
 }
 console.log('--------------------------INSERT----------------------------');
 //console.log('INSERT ID:',result.insertId); 
 console.log('INSERT ID:', result);
 console.log('-----------------------------------------------------------------\n\n');
 });
 //关闭connection
 connection.end(function(err) {
 if (err) {
 return;
 }
 console.log('[connection end] succeed!');
 });
});