Rails - 使用 ruby​​gems 安装电子表格 gem 时出错

我希望能够在 Rails 中处理 Excel 电子表格。
所以我正在使用spreadsheet图书馆。
但是，当我使用 ruby​​gems 安装电子表格时，出现异常：

Successfully installed spreadsheet-0.7.1
1 gem installed
Installing ri documentation for spreadsheet-0.7.1...
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/internals.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/reader/biff8.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/reader.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/writer/biff8.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/writer/format.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/writer/n_worksheet.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/writer/workbook.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/writer/worksheet.rb, skipping
Installing RDoc documentation for spreadsheet-0.7.1...
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/internals.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/reader/biff8.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/reader.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/writer/biff8.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/writer/format.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/writer/n_worksheet.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/writer/workbook.rb, skipping
unable to convert "\xE2" to UTF-8 in conversion from ASCII-8BIT to UTF-8 to GBK
for lib/spreadsheet/excel/writer/worksheet.rb, skipping`

然后在我的 doSomethingController 中，我编写了代码：

require 'spreadsheet'

但服务器返回错误

cannot load such file -- spreadsheet

你能帮我弄清楚发生了什么以及如何修复异常吗

我的环境：

ruby 1.9.3
rubygem 1.8.16

检查你的宝石：

gem list

检查是否已安装：

gem list | grep spreadsheet 

请按照以下网址的使用说明进行操作：http://rubygems.org/gems/spreadsheet http://rubygems.org/gems/spreadsheet其中还讨论了开发依赖性：

hoe ~> 2.13   
rdoc ~> 3.10  

有一个很棒的“入门”指南：http://spreadsheet.rubyforge.org/files/GUIDE_txt.html http://spreadsheet.rubyforge.org/files/GUIDE_txt.html

维基百科-http://spreadsheet.ch/ http://spreadsheet.ch/也很有用。