install

gem 'jw_alipay'
bundle install

or

gem install 'jw_alipay'

doc

https://b.alipay.com/order/productDetail.htm?productId=2012120700377308

config(config/alipay.yml)

development:
  # alipay pid http://help.alipay.com/support/help_detail.htm?help_id=243726&sh=Y&tab=null&info_type=9
  partner: '***'
  # alipay key http://help.alipay.com/support/help_detail.htm?help_id=243726&sh=Y&tab=null&info_type=9
  key: ***
  # alipay account
  email: ***

test:
  partner: '***'
  key: ***
  email: ***

production:
  partner: '***'
  key: ***
  email: ***

routes

get "pay/index"
get "pay/pay_call_back"
post "pay/pay_notify"

controller

# encoding: utf-8
class PayController < ApplicationController
  include JwAlipay::WapHelper

  def index
    redirect_to_wap_alipay_gateway(
        :subject => "pay",
        :out_trade_no => '1234567890', :total => 0.01,
        :call_back_url => 'http://domain/pay/pay_call_back',
        :notify_url => 'http://domain/pay/pay_notify',
        :merchant_url => 'http://domain'
    ) do |token|
      puts token
    end
  end

  # call_back_url http://help.alipay.com/support/help_detail.htm?help_id=243126&sh=Y&tab=null&info_type=9
  def pay_call_back
    call_back do |data|
      puts data.inspect
    end
  end

  # notify_url http://help.alipay.com/support/help_detail.htm?help_id=243126&sh=Y&tab=null&info_type=9
  def pay_notify
    notify do |data|
      puts data.inspect
    end
    render :text => 'success'
  end
end