支付宝即时到账系统java程序开发包 Date Now_Date=new Date(); String paygateway = "https://www.alipay.com/cooperate/gateway.do?"; //'支付接口 String service = "create_direct_pay_by_user";//快速付款交易服务 String sign_type = "MD5"; String out_trade_no = Now_Date.toString(); //商户网站订单 String input_charset = "GBK"