支付宝的开发平台 http://open.alipay.com/platform/home.htm
支付宝 SDK下载链接 http://aopsdkdownload.cn-hangzhou.alipay-pub.aliyun-inc.com/demo/WS_MOBILE_PAY_SDK_BASE.zip?spm=a219a.7629140.0.0.MlJOjM&file=WS_MOBILE_PAY_SDK_BASE.zip