x2j.rb

require 'spreadsheet'
require 'json'

Spreadsheet.client_encoding = 'UTF-8'

begin
book = Spreadsheet.open $*[0]
rescue
STDERR.puts "usage: ruby x2j.rb excel_file"
exit false
end

book.worksheets.each do |sheet|
  next if sheet.name.index('!') == 0

  labels = sheet.rows.first
  rows = []
  sheet.rows[1..-1].each do |row|
    hash = Hash.new()
    row.each_with_index do |cell, i|
      hash[labels[i]] = cell.kind_of?(String) && cell.include?(',') ? cell.split(',') : cell
    end
    rows.push hash
  end

  f = File.open(sheet.name + '.json', 'w')
  f.write JSON.generate(rows)
  f.close
end