rubyonrails:生成PDF文档

1.gem install pdf-writer
2.在contrallor里面加入require 'pdf/writer'
3.在public下建文件夹pdf
4.  def pdf
    gen_pdf
    redirect_to("#{@request.relative_url_root}/pdf/user.pdf")
  end

  private
  def gen_pdf
    pdf = PDF::Writer.new
    pdf.text "User List", :font_size => 12, :justification => :center
    users = User.find(:all)
    users.each do |user|
      pdf.text "#{user.login+' '+user.firstname+'  '+user.lastname}", :justification => :left
    end
    pdf.save_as("public/pdf/user.pdf")
  end
5.在routes.rb里面加入  map.export '/export', :controller => 'users', :action => 'pdf'
6.view ： <%= link_to 'Print',export_path%>