server.js
let http=require('http');//导入http模块
let mysql=require('mysql');//导入mysql模块
//注册，链接数据库
http.createServer(function(req,res){
res.setHeader("Access-Control-Allow-Origin","*");
let data='';
console.log('接收到请i去。。。。');
//接收数据
req.on('data',function(chunk){
data+=chunk;
});
//接受完毕
req.on('end',function(){
// console.log('数据接收完毕:',data);
//username=jay&age=22&addr=newyork
var arr=data.split('&');
let name,age,address;//保存前端传递来的数据
arr.forEach(function(item){
let arr0=item.split('=');
if(arr0[0]=='username'){
name=arr0[1];
}else if(arr0[0]=='age'){
age=arr0[1];
}else if(arr0[0]=='addr'){
address=arr0[1];
}
});
// console.log(name,age,address);
//将数据存入数据库
saveData(name,age,address,function(msg){
res.write(JSON.stringify(msg));
res.end();
});
});
// res.write('hello world');
// res.end();
}).listen(9008);//监听端口号9008
console.log('服务器启动.......');
//将数据存入数据库
function saveData(name,age,address,fn){
//1.创建链接
let conn=mysql.createConnection({
host:'localhost', //主机名
user:"root", //数据库账户名
password:"root", //数据库密码
database:"mytest1" //要连接的数据名称
});
//2.建立链接
conn.connect();
// let sql="SELECT * FROM student;";
let sql=`insert into student (name,age,address) values ('${name}',${age},'${address}');`;
//3.操作 (增/删/改/查)
//参数一：sql语句 参数二:回调函数
conn.query(sql,function(err,result){
if(!err){
console.log('数据库访问成功：',result);
fn({code:200,msg:"注册成功"});
}else{
console.log('数据库访问失败：',err);
}
});
//4.断开链接
conn.end();
}
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<body>
<button onclick="getData()">请求服务器</button>
<script>
// let url = 'http://127.0.0.1:9005?username=tom&pwd=90808';
let url = 'http://127.0.0.1:9008';
function getData() {
let xhr = new XMLHttpRequest();
xhr.open('post', url);
xhr.onreadystatechange = function () {
if (this.readyState == 4 && this.status == 200) {
console.log(this.responseText);;
}
};
// xhr.send(null);
// xhr.send("username=huahua&pwd=9090");
xhr.send("username=abc&age=32&addr=newyork");
}
</script>
</body>
</html>
转载：https://blog.csdn.net/weixin_44200575/article/details/102488446
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