Node+Express+MySql實現簡單增刪改查和登入

var express = require(`express`);
var mysql = require(`mysql`);
var app = express();
var bodyParser = require(`body-parser`);
//連結資料庫
var connection = mysql.createConnection({
    host: `localhost`,
    user: `root`,
    password: `123456`,
    database: `school`
});
connection.connect();
// 建立 application/x-www-form-urlencoded 編碼解析(post方法)
var urlencodedParser = bodyParser.urlencoded({ extended: false })
//設定跨域訪問
app.all(`*`, function (req, res, next) {
    res.header("Access-Control-Allow-Origin", "*");
    res.header("Access-Control-Allow-Headers", "X-Requested-With");
    res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
    res.header("Content-Type", "application/json;charset=utf-8");
    next();
});
//登入
app.post(`/login`,urlencodedParser, function (req, res) {
    var username = req.body.username;
    var password = req.body.password;
    var sql = `select * from login where username = `${username}` and password = `${password}``;
    connection.query(sql, function (err, result) {
        console.log(result)
        if (err || result.length == 0) {
            res.status(200),
                res.json("登陸失敗")
        } else {
            res.status(200),
                res.json("登陸成功")
        }
    });
})

//查詢
app.get(`/query`, function (req, res) {
    var sql = `select * from student`;
    connection.query(sql, function (err, result) {
        if (err) {
            console.log(`err:`, err.message);
        }
        console.log(result);
        res.status(200),
            res.json(result)
    });
});
//修改
app.get(`/change`, function (req, res) {
    var SNO = req.query.SNO;
    var SNAME = req.query.SNAME;
    var SDEPT = req.query.SDEPT;
    var sql = `update student set SNAME = `${SNAME}`,SDEPT = `${SDEPT}` where SNO = `${SNO}``;
    connection.query(sql, function (err, result) {
        if (err) {
            console.log(`err:`, err.message);
        }
        console.log(result);
        res.status(200),
            res.json("修改成功")
    });
})
//新增
app.get(`/add`, function (req, res) {
    console.log(req.query)
    var SNO = req.query.SNO;
    var SNAME = req.query.SNAME;
    var SDEPT = req.query.SDEPT;
    var sql = `insert into student values (`${SNO}`,`${SNAME}`,`${SDEPT}`)`;
    connection.query(sql, function (err, result) {
        if (err) {
            console.log(`err:`, err.message);
        }
        console.log(result);
        res.status(200),
            res.json("新增成功")
    });
})
//刪除
app.get(`/delete`, function (req, res) {
    console.log(req.query)
    var SNO = req.query.SNO;
    var sql = `delete from student where SNO=`${SNO}``;
    connection.query(sql, function (err, result) {
        if (err) {
            console.log(`err:`, err.message);
        }
        console.log(result);
        res.status(200),
            res.json("刪除成功")
    });
})

// connection.end();

//配置服務埠
var server = app.listen(8080, function () {
    var host = server.address().address;
    var port = server.address().port;
    console.log(`http://`, host, port);
})

github：https://github.com/Rossy11/no…