class DataFile < ActiveRecord::Base

  def initialize

  end

  def name

    @name

  end

  def name=(att)

    @name=att

  end

  def save(upload)

    self.name =  upload['datafile'].original_filename+Time.now.to_s

    directory = "tmp/file"

    # create the file path

    path = File.join(directory, self.name)

    # write the file

    File.open(path, "wb") { |f| f.write(upload['datafile'].read) }

  end

  def delete

    File.delete(Rails.root.join('tmp','File',name))

  end

end
 

def save_upload_file

    if(params[:upload].nil?)

      @msg ='请选择一个文件'

      render  "upload_error.js"

      return

    end

    postFile =DataFile.new

    postFile.save(params[:upload])

    render :text => "File has been uploaded successfully"

    #postFile.delete

  end

  def upload

  end

<h1>File Upload</h1>

<%= form_tag( save_upload_file_path , :multipart => true,:remote => true) do %>

<p><label for="upload_file">Select File</label> :

<%= file_field 'upload', 'datafile' ,:id =>"filename"%></p>

<%= submit_tag "upload", :class => 'btn btn-primary', :id => 'upload' %>

<% end %>

s=File.read("test.csv",:encoding => "gbk")