NodeJS文件不会启动

Question

好的，我最近决定开始使用Node.JS（学习它），每当我通过输入

来运行文件

node start.js

它只是吐出来

Server running at http://127.0.0.1:1337/

events.js:72
    throw er; // Unhandled 'error' event
         ^
Error: listen EADDRINUSE
at errnoException (net.js:901:11)
at Server._listen2 (net.js:1039:14)
at listen (net.js:1061:10)
at net.js:1135:9
at dns.js:72:18
at process._tickCallback (node.js:415:13)
at Function.Module.runMain (module.js:499:11)
at startup (node.js:119:16)
at node.js:901:3

代码

var http = require('http'); http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(1337, '127.0.0.1');
console.log('Server running at http://127.0.0.1:1337/');