var formidable = require('formidable');

 var fs = require("fs");

 app.use('/test',function(req,res){

     console.log("有文件了");

     var form = new formidable.IncomingForm();

     form.encoding = 'utf-8';

     form.uploadDir = path.join(__dirname + "/../page/upload");

     form.keepExtensions = true;//保留后缀

     form.maxFieldsSize = 2 * 1024 * 1024;

     //处理图片

     form.parse(req, function (err, fields, files){//错误，json，文件

         var filename = files.img.name;

         var nameArray = filename.split('.');

         var type = nameArray[nameArray.length - 1];

         var date = new Date();

         var time = '_' + date.getFullYear() + "_" + date.getMonth() + "_" + date.getDay() + "_" + date.getHours() + "_" + date.getMinutes();

         var avatarName = time + '.' + type;

         var newPath = form.uploadDir + "/" + avatarName;

         fs.renameSync(files.img.path, newPath);  //重命名

         res.send("接收成功")

     });

 }