1 /**
2 * Created by Administrator on 2016/8/3.
3 */
4 var http = require("http");
5 //Node 导入文件系统模块
6 var fs = require("fs");
7 //引入events模块
8 var events = require("events");
9 //创建eventEmitter对象
10 var eventEmitter = new events.EventEmitter(); //注意大小写
11 //绑定事件以及事件的处理程序
12 eventEmitter.on("oneEvent",function(){
13 //异步读取文件内容的函数: readFile()
14 fs.readFile("index.txt", "utf-8", function(err, data){
15 if(err){
16 console.log(err);
17 }else{
18 console.log(data);
19 }
20 });
21 console.log("end异步");
22 });
23 //触发事件
24 eventEmitter.emit("oneEvent");
25 function start(req, res){
26 res.writeHead(200, {"Content-Type": "text/plain"});
27 res.write("异步读取文件和同步读取文件的对比！");
28 res.end("over");
29 }
30 //创建一个http服务器，并监听端口号为3001，host为127.1.1.1
31 var server = http.createServer(start).listen("3002","127.1.1.1",function(){
32 var port = server.address().port;
33 var host = server.address().address;
34 console.log("应用实例，访问地址为 http://%s:%s", host, port);
35 });
//引入events模块
var events = require("events");
//创建eventEmitter对象
var eventEmitter = new events.EventEmitter(); //注意大小写
//绑定事件以及事件的处理程序
eventEmitter.on("eventName",function(){
console.log("事件处理代码。");
});
//触发事件
eventEmitter.emit("eventName");
