ruby – 如何将CSV转换为Excel？

Ruby中是否有任何将CSV文件转换为Excel的插件.我做了很少的谷歌,但我发现只是将Excel文件转换为CSV.我知道一些宝石,我可以稍微调整并用于将Excel转换为CSV但我需要知道是否有人之前已经这样做过.

解决方法

根据 this post,spreadsheet宝石是可能的.看起来这是一个非常受欢迎的宝石.看看这个.例：

book = Spreadsheet::Workbook.new
sheet1 = book.create_worksheet

header_format = Spreadsheet::Format.new(
  :weight => :bold,:horizontal_align => :center,:bottom => true,:locked => true
)

sheet1.row(0).default_format = header_format

FasterCSV.open(input_path,'r') do |csv|
  csv.each_with_index do |row,i|
    sheet1.row(i).replace(row)
  end
end

book.write(output_path)

根据this post,write_xlsx是可能的.

我用JRuby的Apache POI library来导出xls文件.这是一个简单的例子.

require 'java'
require 'poi.jar'
# require 'poi-ooxml.jar'
require 'rubygems'
require 'fastercsv'

java_import org.apache.poi.hssf.usermodel.HSSFWorkbook;

wb = HSSFWorkbook.new # OR XSSFWorkbook,for xlsx
sheet = wb.create_sheet('Sheet 1')

FasterCSV.open(ARGV.first) do |csv|
  csv.each_with_index do |csv_row,line_no|
    row = sheet.createRow(line_no)
    csv_row.each_with_index do |csv_value,col_no|
      cell = row.createCell(col_no)
      cell.setCellValue(csv_value) unless csv_value.nil? # can't pass nil.
    end
  end
end


f = java.io.FileOutputStream.new("workbook.xls")
wb.write(f)
f.close

一些有用的格式化POI电子表格的方法是

> sheet.createFreezePane(0,1,1)
> wb.setRepeatingRowsAndColumns(0,-1,1)
> sheet.setColumnWidth(i,100 * 256)
> sheet.autoSizeColumn(i),但要注意,如果你在无头模式下运行,你必须调用java.lang.System.setProperty(“java.awt.headless”,“true”)

如果安装了Excel,也可以在Windows上使用Win32ole

require 'win32ole'
require 'rubygems'
require 'fastercsv'

xl = WIN32OLE.new('Excel.Application')
xl.Visible = 0
wb = xl.Workbooks.Add
ws = wb.Worksheets(1)

FasterCSV.open(ARGV.first) do |csv|
  csv.each_with_index do |csv_row,line_no|
    csv_row.each_with_index do |value,col|
      ws.Cells(line_no + 1,col + 1).Value = value
    end
  end
end

wb.SaveAs("workbook.xls",56) # 56 = xlExcel8 aka Excel 97-2003. i.e. xls
wb.SaveAs("workbook.xlsx",51) # 51 = xlOpenXMLWorkbook
wb.SaveAs("workbook.xlsb",50) # 50 = xlExcel12

wb.Close(2) #xlDoNotSaveChanges
xl.Quit

使用Excel格式化的一些有用方法是

> xl.Rows(1).Font.Bold = true
> ws.Cells.EntireColumn.AutoFit

另一个选择是直接写入微软的XML Spreadsheet格式,正如Railscasts.com上的Ryan Bates做at the end of his Exporting CSV and Excel episode.

<?xml version="1.0"?>
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet"
  xmlns:o="urn:schemas-microsoft-com:office:office"
  xmlns:x="urn:schemas-microsoft-com:office:excel"
  xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet"
  xmlns:html="http://www.w3.org/TR/REC-html40">
  <Worksheet ss:Name="Sheet1">
    <Table>
      <Row>
        <Cell><Data ss:Type="String">ID</Data></Cell>
        <Cell><Data ss:Type="String">Name</Data></Cell>
        <Cell><Data ss:Type="String">Release Date</Data></Cell>
        <Cell><Data ss:Type="String">Price</Data></Cell>
      </Row>
    <% @products.each do |product| %>
      <Row>
        <Cell><Data ss:Type="Number"><%= product.id %></Data></Cell>
        <Cell><Data ss:Type="String"><%= product.name %></Data></Cell>
        <Cell><Data ss:Type="String"><%= product.released_on %></Data></Cell>
        <Cell><Data ss:Type="Number"><%= product.price %></Data></Cell>
      </Row>
    <% end %>
    </Table>
  </Worksheet>
</Workbook>

This gem looks promising,too.