educoder/app/views/graduation_topics/export.xlsx.axlsx

wb = xlsx_package.workbook
# wb.use_autowidth = false
wb.use_shared_strings = true

wb.styles do |s|
  sz_all = s.add_style :border => { :style => :thin, :color =>"000000" },:alignment => {wrap_text: true,:horizontal => :center,:vertical => :center }
  bg_db = s.add_style :bg_color=> "DBEEF4",:border => { :style => :thick, :color =>"000000" },:alignment => {wrap_text: true,:horizontal => :center,:vertical => :center }
  bg_d2 = s.add_style :bg_color=> "CCC1DA",:border => { :style => :thick, :color =>"000000" },:alignment => {wrap_text: true,:horizontal => :center,:vertical => :center }
  bg_cc = s.add_style :bg_color=> "CCC1DA",:border => { :style => :thick, :color =>"000000" },:alignment => {wrap_text: true,:horizontal => :center,:vertical => :center }
  bg_ff = s.add_style :bg_color=> "FFC000",:border => { :style => :thick, :color =>"000000" },:alignment => {wrap_text: true,:horizontal => :center,:vertical => :center }
  bg_bb = s.add_style :bg_color=> "9BBB59",:border => { :style => :thick, :color =>"000000" },:alignment => {wrap_text: true,:horizontal => :center,:vertical => :center }
  bg_cell = s.add_style :bg_color => "FAEBDC", :sz => 10,:b => true, :border => { :style => :thin, :color =>"000000" },:alignment => {wrap_text: true,:horizontal => :center,:vertical => :center }

  wb.add_worksheet(:name => "毕设选题情况汇总") do |sheet|
    sheet.sheet_view.show_grid_lines = false
    sheet_title = table_columns
    sheet_title_c = sheet_title.count
    sheet.add_row sheet_title,:height => 30, :style => bg_cell
    sheet["J1:L1"].each { |c| c.style = bg_db }
    sheet["M1:O1"].each { |c| c.style = bg_cc }
    sheet["P1:Q1"].each { |c| c.style = bg_d2 }
    sheet["R1:T1"].each { |c| c.style = bg_ff }
    sheet["U1:W1"].each { |c| c.style = bg_bb }
    if topic_users.count > 0
      topic_users.each do |user|
        sheet.add_row user,:height => 18, :style => sz_all
      end  #each_widh_index
    else
      sheet.add_row ["--"]*sheet_title_c,:height => 18
    end

    sheet.column_widths *([15]*sheet.column_info.count)
    sheet.column_info.first.width = 8
  end  #add_worksheet
end