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1. 首页要给自己的项目添加一个插件：

ruby script/plugin install http://svn.napcsweb.com/public/excel

    此时项目的vender目录里有一个excel.rb,这就是我们的核心方法

2. OrderedHash这个hash是有序的，需要在控制器里面导入

3.看个控制器里的实例

def export    @ala_users = User.find(:all)    @count = Record.count(:conditions => [' ala_organization_id = ? and ala_user_id = ? ',session[:organization_id],session[:user_id]])     @count_pass = Record.count(:conditions => [' ala_organization_id = ? and ala_user_id = ? and status = ? ',session[:organization_id],session[:user_id],'6'])            array = Array.new    for i in 0..@ala_users.length-1      item = OrderedHash.new      item["姓名"] = @ala_users[i].name      item["部门"] = @ala_users[i].ala_department.name if @ala_users[i].ala_department      item["职位"] = @ala_users[i].positions      item["学时"] = @ala_users[i].learning_times      item["学分"] = @ala_users[i].learning_credits      item["报名课程数"] = @count[i]      item["通过课程数"] = @count_pass[i]      array << item    end    e = Excel::Workbook.new    e.addWorksheetFromArrayOfHashes("Books info", array)    headers['Content-Type'] = "application/vnd.ms-excel"    headers['Content-Disposition'] = 'attachment; filename="excel-export.xls"'    headers['Cache-Control'] = ''    render :text=>e.build  end

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