wb = xlsx_package.workbook
wb.styles do |s|
  sz_all = s.add_style :border => { :style => :thin, :color =>"000000" },:alignment => {wrap_text: true,:horizontal => :center, :vertical => :center}
  blue_cell = s.add_style :bg_color => "FAEBDC", :sz => 10,:height => 20,:b => true, :border => { :style => :thin, :color =>"000000" },:alignment => {wrap_text: true,:horizontal => :center,:vertical => :center}

  wb.add_worksheet(:name => "报名列表") do |sheet|
    sheet.add_row table_columns, :style => blue_cell, height: 30
    sheet.column_info.first.width = 20
    export_infos.each do |user|
      sheet.add_row user, :style => sz_all #用户id
    end  #each_widh_index
  end  #add_worksheet
end