Rails中用CSV导出中文真心有技巧

require 'csv'

class PartRequestsController < ApplicationController
  def render_csv_header(filename = nil)
    filename ||= params[:action]
    filename += '.csv'
    if request.env['HTTP_USER_AGENT'] =~ /msie/i
      headers['Pragma'] = 'public'
      headers["Content-type"] = "text/plain"
      headers['Cache-Control'] = 'no-cache, must-revalidate, post-check=0, pre-check=0'
      headers['Content-Disposition'] = "attachment; filename=\"#{filename}\""
      headers['Expires'] = "0"
    else
      headers["Content-Type"] ||= 'text/csv'
      headers["Content-Disposition"] = "attachment; filename=\"#{filename}\""
    end
  end

  def index
    @part_requests = PartRequest.where(:status => params[:status]).order('id DESC')
    @status = params[:status]

    respond_to do |format|
      format.html # index.html.erb
      format.json { render json: @part_requests }
      format.csv do
        render_csv_header 'Part_Request_Report'
        csv_res = CSV.generate do |csv|
          csv << PartRequest.new.attributes.keys
          @part_requests.each do |o|
            o.part_request_details.each do |d|
              csv << o.attributes.values
            end
          end
        end
        send_data "\xEF\xBB\xBF"<<csv_res.force_encoding("ASCII-8BIT")
      end
    end
  end
end
      end
    end
  end
end