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var fs = require("fs");//异步地写入数据到文件 如果没有文件就创建并写入fs.writeFile('wen.txt', 'Hello Node.js', (err) => { if (err) throw err; console.log('写入文件!');});console.info("文件写入成功");

day01.js/* * 引用需要的模块（require） **/var http = require("http");//http模块，主要用于http的处理和解析//createServer方法能够创建一个服务var myApp = http.createServer(function(request,response){ //200 表示相应成功 response.wri

var express = require("express");var app = express();// npm install express-session --savevar session = require("express-session");app.use(session({ secret: 'keyboard cat', resave: false

var express = require('express');// npm install --save cookie-parser var cookieParser = require('cookie-parser'); var app = express();//使用cookie必须要使用cookie-parser中间件app.use(cookieParser());a

var express = require("express");var app = express();app.get("/login",function(req,res){ console.log(req.query); res.send();});app.listen(3000);

var http = require("http");var fs = require("fs");var server = http.createServer(function(req,res){ //不处理收藏夹小图标 if(req.url == "/favicon.ico"){ return; } //遍历album里面的所有文件、文件夹 fs.readdir("./al

demo3.jsvar fs = require("fs");//判断打开的是文件 还是 文件夹var path = "wen.txt";fs.stat(path,function(err,stat){ if (err) { console.error(err); throw err; } console.log(stat); console.info(path+"是

demo2.js 异步var fs = require("fs");//异步读取文件fs.readFile("wen.txt","utf-8",function(err,fd){ if (err) { console.error(err); throw err; } console.info(fd);});console.info("文件读取成功··");d

demo2.jsvar http = require("http");var url = require("url");/* require同级目录的时候需要需要加上./ * 否则会找不到文件 */var User = require("./User");var myApp = http.createServer(function(request,response){ /*防

demo2.jsvar http = require("http");var url = require("url");/* require同级目录的时候需要需要加上./ * 否则会找不到文件 */var User = require("./User");var myApp = http.createServer(function(request,response){ /*防

demo.jsvar http = require("http");/* require同级目录的时候需要需要加上./ * 否则会找不到文件 */var User = require("./User");var myApp = http.createServer(function(request,response){ /*防止两次访问服务器*/ if(request.url

var fs = require("fs");fs.appendFile('message.txt', 'data to append', (err) => { if (err) throw err; console.log('文件插入成功');});console.log("文件插入");

var fs = require("fs");//异步 文件删除(判断文件是否存在)fs.exists("./wen.txt", function(exist) { /* * exist 的值为布尔 * false 不存在 * true 存在 */ console.log(exist); if(exist) { fs.unlink("./wen.txt", funct

var fs = require("fs");//文件该改名fs.rename("./wen2.txt","./wen.txt");console.info("文件改名");