node.js操作mysql相关详细API：https://github.com/mysqljs/mysql
步骤一：准备好node环境
初始化环境 npm init，安装express并引入express
步骤二：安装mysql
npm install mysql --save
//app.js
const express=require('express');
const mysql=require('mysql');
const app=express();
//创建连接
const connection = mysql.createConnection({
host : 'localhost',
user : 'me',
password : 'secret',
database : 'my_db'
});
connection.connect((err)=>{
if(err) throw err;
console.log('mysql is conected');
});
// 创建数据库
app.get('/createdb', (req, res) => {
let sql = 'CREATE DATABASE nodemysql';
db.query(sql, (err, result) => {
if (err) throw err;
console.log(result);
res.send('Database created...');
});
});
// 创建表
app.get('/createpoststable', (req, res) => {
let sql =
'CREATE TABLE posts(id int AUTO_INCREMENT,title VARCHAR(255),body VARCHAR(255), PRIMARY KEY(id))';
db.query(sql, (err, result) => {
if (err) throw err;
console.log(result);
res.send('posts表已经建立...');
});
});
// 插入内容
app.get('/addpost1', (req, res) => {
let post = { title: 'post one', body: 'this is post one' };
let sql = 'INSERT INTO posts SET ?';
db.query(sql, post, (err, result) => {
if (err) throw err;
console.log(result);
res.send('post 1 added....');
});
});
// 查询内容
app.get('/getposts', (req, res) => {
let sql = 'SELECT * FROM posts';
db.query(sql, (err, result) => {
if (err) throw err;
console.log(result);
res.json(result);
});
});
// 查询单条内容
app.get('/getpost/:id', (req, res) => {
let sql = `SELECT * FROM posts WHERE id = ${req.params.id}`;
db.query(sql, (err, result) => {
if (err) throw err;
console.log(result);
res.json(result);
});
});
// 更新内容
app.get('/updatepost/:id', (req, res) => {
let newTitle = 'update title';
let sql = `UPDATE posts SET title = '${newTitle}' WHERE id = ${req.params.id}`;
db.query(sql, (err, result) => {
if (err) throw err;
console.log(result);
res.json('更新成功...');
});
});
// 删除内容
app.get('/deletepost/:id', (req, res) => {
let sql = `DELETE FROM posts WHERE id = ${req.params.id}`;
db.query(sql, (err, result) => {
if (err) throw err;
console.log(result);
res.json('删除成功....');
});
});
app.listen(3000,()=>{
console.log('server started on 3000');
});
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