如何获取JAVA生成的支付宝客户端所需的长尾参数？

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javapackage com.pay.alipay;

import com.alipay.api.AlipayApiException;import com.alipay.api.AlipayClient;import com.alipay.api.DefaultAlipayClient;import com.alipay.api.domain.AlipayTradeAppPayModel;

AlipayUtils

package com.pay.alipay; import com.alipay.api.AlipayApiException; import com.alipay.api.AlipayClient; import com.alipay.api.DefaultAlipayClient; import com.alipay.api.domain.AlipayTradeAppPayModel; import com.alipay.api.internal.util.AlipaySignature; import com.alipay.api.request.AlipayTradeAppPayRequest; import com.alipay.api.response.AlipayTradeAppPayResponse; import com.kunze.taigan.api.notify.PayNotifyHelper; import java.io.PrintStream; import java.net.URLEncoder; import java.text.SimpleDateFormat; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Set; import utils.AppConfig; public class AlipayUtils { private static final String APPID = "appid"; private static final String PRIVATE_KEY = ""; private static final String PUBLIC_KEY = ""; private static final String CHARSET = "utf-8"; private static final String SERVER_URI = "openapi.alipay.com/gateway.do"; private static final String NOTIFY_URL = "www.notifyurl.com/notify_url_alipay.do"; private static final String SUBJECT = "充值"; private static final String BODY = "余额支付"; private static final String PAY_TYPE = "支付宝"; public static String getPayParams(String price, String out_trade_no) { AlipayClient alipayClient = new DefaultAlipayClient(SERVER_URI, APPID, PRIVATE_KEY, "json", "utf-8", PUBLIC_KEY, "RSA2"); AlipayTradeAppPayRequest request = new AlipayTradeAppPayRequest(); request.setNotifyUrl(NOTIFY_URL); AlipayTradeAppPayModel model = new AlipayTradeAppPayModel(); model.setBody(BODY); model.setSubject(SUBJECT); model.setOutTradeNo(out_trade_no); model.setTimeoutExpress("5m"); model.setTotalAmount(price); model.setProductCode("QUICK_MSECURITY_PAY"); request.setBizModel(model); try { AlipayTradeAppPayResponse response = (AlipayTradeAppPayResponse) alipayClient .sdkExecute(request); return URLEncoder.encode(response.getBody()); } catch (AlipayApiException e) { e.printStackTrace(); } return ""; } public static String payNofityCallback(Map requestParams) { System.out.println("支付宝支付结果通知" + requestParams.toString()); Map params = new HashMap(); for (Iterator iter = requestParams.keySet().iterator(); iter.hasNext();) { String name = (String) iter.next(); String[] values = (String[]) requestParams.get(name); params.put(name, values[0]); } try { if ((!APPID.equals(params.get("auth_app_id"))) && (!APPID.equals(params.get("app_id")))) { return "fail"; } if (AlipaySignature.rsaCheckV1(params, PUBLIC_KEY, AppConfig.DefaultEncoding, "RSA2")) { if ("TRADE_SUCCESS".equals(params.get("trade_status"))) { double amount = Double.parseDouble("0" + (String) params.get("total_amount")); String out_trade_no = (String) params.get("out_trade_no"); String trade_no = (String) params.get("trade_no"); String[] order_params = out_trade_no.split("_"); String userid = order_params[0]; if (PayNotifyHelper.shouldDo(trade_no, PAY_TYPE)) { String orderTime_str = new SimpleDateFormat( "yyyy-MM-MM HH:mm:ss.SSS") .format(new SimpleDateFormat( "yyyyMMddHHmmssSSS") .parse(order_params[1])); if (PayNotifyHelper.addOrder(userid, amount, out_trade_no, trade_no,PAY_TYPE, orderTime_str, (String) params.get("gmt_payment"))) { return "success"; } return "fail"; } return "success"; } if ("TRADE_CLOSE".equals(params.get("trade_status"))) { return "success"; } } } catch (Exception e) { e.printStackTrace(); } return "fail"; } } notify_url

response.setHeader("Content-type", "text/html;charset=" + AppConfig.DefaultEncoding); response.setCharacterEncoding(AppConfig.DefaultEncoding); request.setCharacterEncoding(AppConfig.DefaultEncoding); String result=AlipayUtils.payNofityCallback(request.getParameterMap()); response.getOutputStream().write(result.getBytes(AppConfig.DefaultEncoding));