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刚安装好vue项目运行环境，出现以下问题：

events.js:160      throw er; // Unhandled 'error' event      ^Error: listen EADDRINUSE :::8080    at Object.exports._errnoException (util.js:1022:11)    at exports._exceptionWithHostPort (util.js:1045:20)    at Server._listen2 (net.js:1259:14)    at listen (net.js:1295:10)    at Server.listen (net.js:1391:5)    at EventEmitter.listen (F:\代码\博客改版\学习\Vue\vue-demo\node_modules\express\lib\application.js:618:24)    at Object.
   
     (F:\代码\博客改版\学习\Vue\vue-demo\build\dev-server.js:85:18)    at Module._compile (module.js:570:32)    at Object.Module._extensions..js (module.js:579:10)    at Module.load (module.js:487:32)    at tryModuleLoad (module.js:446:12)    at Function.Module._load (module.js:438:3)    at Module.runMain (module.js:604:10)    at run (bootstrap_node.js:394:7)    at startup (bootstrap_node.js:149:9)    at bootstrap_node.js:509:3npm ERR! Windows_NT 6.1.7601npm ERR! argv "D:\\Program Files\\nodejs\\node.exe" "D:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "run" "dev"npm ERR! node v6.10.0npm ERR! npm  v3.10.10npm ERR! code ELIFECYCLEnpm ERR! vue-demo@1.0.0 dev: `node build/dev-server.js`npm ERR! Exit status 1npm ERR! npm ERR! Failed at the vue-demo@1.0.0 dev script 'node build/dev-server.js'.npm ERR! Make sure you have the latest version of node.js and npm installed.npm ERR! If you do, this is most likely a problem with the vue-demo package,npm ERR! not with npm itself.npm ERR! Tell the author that this fails on your system:npm ERR!     node build/dev-server.jsnpm ERR! You can get information on how to open an issue for this project with:npm ERR!     npm bugs vue-demonpm ERR! Or if that isn't available, you can get their info via:npm ERR!     npm owner ls vue-demonpm ERR! There is likely additional logging output above.npm ERR! Please include the following file with any support request:npm ERR!     F:\代码\博客改版\学习\Vue\vue-demo\npm-debug.logProcess finished with exit code 1
   

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