var express = require(‘express’);
var mysql = require(‘mysql’);
var app = express();
var bodyParser = require(‘body-parser’);
// 链接数据库
var connection = mysql.createConnection({
host: ‘localhost’,
user: ‘root’,
password: ‘123456’,
database: ‘school’
});
connection.connect();
// 创建 application/x-www-form-urlencoded 编码解析 (post 方法)
var urlencodedParser = bodyParser.urlencoded({extended: false})
// 设置跨域访问
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();
});
// 登录
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(“ 登陆失败 ”)
} else {
res.status(200),
res.json(“ 登陆成功 ”)
}
});
})
// 查询
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 = ‘${SNO}’`;
connection.query(sql, function (err, result) {
if (err) {
console.log(‘err:’, err.message);
}
console.log(result);
res.status(200),
res.json(“ 修改成功 ”)
});
})
// 添加
app.get(‘/add’, function (req, res) {
console.log(req.query)
var SNO = req.query.SNO;
var SNAME = req.query.SNAME;
var SDEPT = req.query.SDEPT;
var sql = `insert into student values (‘${SNO}’,’${SNAME}’,’${SDEPT}’)`;
connection.query(sql, function (err, result) {
if (err) {
console.log(‘err:’, err.message);
}
console.log(result);
res.status(200),
res.json(“ 添加成功 ”)
});
})
// 删除
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(“ 删除成功 ”)
});
})
// connection.end();
// 配置服务端口
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…