一:包的安装:
我们这里用expres来搭建服务器并发起请求,用到sql的包连接数据库:所以安装它们:
npm install express
npm install sql
二:引入包:
const express = require('express');
const mysql = require("mysql");
三:连接数据库并读取数据:
const express = require('express');
const app = express();
const mysql = require("mysql");
const connection = mysql.createConnection({
host: "localhost",//主机名
user: "root",//用户名
password: "123456",//用户密码
database: "mydb"//你的数据库名
})
connection.connect();
app.get('/', (req, res) => {
// 连接user表
var sql = "select * from user order by id desc";
connection.query(sql, (err, result) => {
if (err) {
lconsole.log("select error", err.message);
}
console.log(result)
res.json(result)
})
});
app.listen(8888, () => {
console.log("server running at http://127.0.0.1:8888");
});
数据库中参数说明:(来源于菜鸟教程)