node.js 的使用

時間 2019-11-10

原文原文鏈接

基礎知識推薦：http://www.runoob.com/nodejs/javascript

開發環境： windows7 mysql html

IDE: visual studio code java

代碼結構：node

connection.js mysql

var mysql=require("mysql");
function connection(){
  this.connection = mysql.createConnection({
    host     : 'localhost',
    user     : 'root',
    password : '123456',
    database : 'Sws'
  });
}
module.exports=connection;

sql.js程序員

var connectionModlue=require("./connection");
var connectionObject=new connectionModlue();
function dataBase(){
    var connection=connectionObject.connection;
    connection.connect();
    var  sql = 'SELECT * FROM user';
    this.allUser=connection.query(sql,function (err, result) {
        if(err){
          console.log('[SELECT ERROR] - ',err.message);
          return;
        } 
       });
       connection.end();
}
module.exports=dataBase;

service.jssql

var sqlModlue=require("./sql");
var sqlObject=new sqlModlue();
function userData(){
    this.allUser=sqlObject.allUser;
}
module.exports=userData;

controller.jsexpress

var http=require("http");
var url=require("url");
var bodyParser = require('body-parser');
var express=require("express");
var userService=require("./service");
var app=express();
// 建立 application/x-www-form-urlencoded 編碼解析
var urlencodedParser = bodyParser.urlencoded({ extended: false })
app.get('/', function (req, res) {
    res.sendFile( __dirname + "/" + "index.html" );
 });
app.post('/login',urlencodedParser,function(req,res){
    var userObject=new userService();
    var allUser=userObject.allUser._results[0];
    var userName=req.body.userName;
    var password=req.body.password;
    for(var i in allUser){
        if(userName==allUser[i].NAME&&password==allUser[i].PASSWORD){
            res.set("isLogin",true);
            res.sendFile( __dirname + "/" + "success.html");
        }
    }
    res.set("isLogin",false);
    res.sendFile( __dirname + "/" + "failer.html");
 });
app.listen(8081);

index.htmlwindows

<!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">
    <script type="text/script"src=""></script>
    <title>登錄</title>
    <script type="text/script">
    </script>
</head>
<body>
    <form action="/login" method="post">
        <input type="text" name="userName"/><br/>
        <input type="password" name="password">
        <input type="submit" value="登錄">
    </form>
</body>
</html>

success.htmlapp

<!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>首頁</title>
</head>
<body>
    <p>登錄成功</p>
</body>
</html>

failer.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>首頁</title>
</head>
<body>
    <p>登錄失敗</p>
</body>
</html>

上面就是完整的node.js的登錄功能實現了，由於本身是java程序員因此按照 java的分層模式把node 分紅數據訪問層業務邏輯層控制層以及視圖