<dependency>
<groupId>com.alipay.sdk</groupId>
<artifactId>alipay-sdk-java</artifactId>
<version>3.1.0</version>
</dependency>

package com.pay.alipay.util.config;import java.io.FileWriter;
import java.io.IOException;/* **类名：AlipayConfig*功能：基础配置类*详细：设置帐户有关信息及返回路径*修改日期：2017-04-05*说明：*以下代码只是为了方便商户测试而提供的样例代码，商户可以根据自己网站的需要，按照技术文档编写,并非一定要使用该代码。*该代码仅供学习和研究支付宝接口使用，只是提供一个参考。*/public class AlipayConfig {// 应用ID,您的APPID，收款账号既是您的APPID对应支付宝账号public static String app_id ="2016091800539310";// 商户私钥，您的PKCS8格式RSA2私钥public static String merchant_private_key = "很长很长的字符串";// 支付宝公钥,查看地址：https://openhome.alipay.com/platform/keyManage.htm 对应APPID下的支付宝公钥。public static String alipay_public_key = "很长很长的字符串";// 服务器异步通知页面路径  需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问public static String notify_url = "http://68a71d94.ngrok.io/alipay/notify";// 页面跳转同步通知页面路径 需http://格式的完整路径，不能加?id=123这类自定义参数，必须外网可以正常访问public static String return_url = "http://localhost:80";// 签名方式public static String sign_type = "RSA2";// 字符编码格式public static String charset = "utf-8";// 支付宝网关//public static String gatewayUrl = "https://openapi.alipay.com/gateway.do";public static String gatewayUrl = "https://openapi.alipaydev.com/gateway.do";//（沙箱环境）//  public static String gatewayUrl = "https://openapi.alipay.com/gateway.do";//（正式环境）// 支付宝网关public static String log_path = "C:\\";/** * 写日志，方便测试（看网站需求，也可以改成把记录存入数据库）* @param sWord 要写入日志里的文本内容*/public static void logResult(String sWord) {FileWriter writer = null;try {writer = new FileWriter(log_path + "alipay_log_" + System.currentTimeMillis()+".txt");writer.write(sWord);} catch (Exception e) {e.printStackTrace();} finally {if (writer != null) {try {writer.close();} catch (IOException e) {e.printStackTrace();}}}}}

@RequestMapping(value="/alipay",method =RequestMethod.GET)public void alipay(HttpServletRequest request,HttpServletResponse response) {String  result =null;try {log.info("------->开始调用支付宝支付接口");//开始时间long starttime = System.currentTimeMillis();result =alipay.startAlipay();log.info("alipay支付请求结束，用时："+ (System.currentTimeMillis() - starttime) + "毫秒");}catch(Exception e) {e.printStackTrace();}response.setContentType("text/html;charset=utf8");response.getWriter().write(result);//直接将完整的表单html输出到页面
        response.getWriter().flush();response.getWriter().close(); }

package com.pay.entity;public class PayBizContent {//商户订单号，商户网站订单系统中唯一订单号，必填private String out_trade_no;//支付金额，，必填private String total_amount;//订单名称private String subject;//商品描述private String body;private  String product_code;public String getProduct_code() {return product_code;}public void setProduct_code(String product_code) {this.product_code = product_code;}@Overridepublic String toString() {return "AlipayBizContent [out_trade_no=" + out_trade_no + ", total_amount=" + total_amount + ", subject="+ subject + ", body=" + body + ", timeout_express=" + timeout_express + "]";}//订单失效时间，如果是十分钟则是10m配置;private String timeout_express;public String getOut_trade_no() {return out_trade_no;}public void setOut_trade_no(String out_trade_no) {this.out_trade_no = out_trade_no;}public String getTotal_amount() {return total_amount;}public void setTotal_amount(String total_amount) {this.total_amount = total_amount;}public String getSubject() {return subject;}public void setSubject(String subject) {this.subject = subject;}public String getBody() {return body;}public void setBody(String body) {this.body = body;}public String getTimeout_express() {return timeout_express;}public void setTimeout_express(String timeout_express) {this.timeout_express = timeout_express;}}

public String startAlipay() {//获得初始化的AlipayClient，微信SDK提供的，直接使用即可AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl,AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json",AlipayConfig.charset, AlipayConfig.alipay_public_key,AlipayConfig.sign_type);//wap端支付AlipayTradeWapPayRequest alipayRequest=new AlipayTradeWapPayRequest();//*****************pc端支付用这个****************////AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        alipayRequest.setReturnUrl(AlipayConfig.return_url);alipayRequest.setNotifyUrl(AlipayConfig.notify_url);PayBizContent aliContent =new PayBizContent();aliContent.setTotal_amount("1290");//金额aliContent.setSubject("辣条");//商品名称aliContent.setOut_trade_no("180458382060");//商户订单，必须是唯一的aliContent.setTimeout_express("10m");//过期时间为10m;//**************pc端类型用这个**********************//
        aliContent.setProduct_code("FAST_INSTANT_TRADE_PAY");aliContent.setProduct_code("QUICK_WAP_WAY");JSONObject json =new JSONObject();alipayRequest.setBizContent(json.toJSONString(aliContent));log.info("放入支付宝接口中的参数--->"+alipayRequest.getBizContent());try {//成功后返回一个form表单字符串String  form = alipayClient.pageExecute(alipayRequest).getBody();log.info("AlipayServiceImpl-----调用支付宝返回结果:"+form);return form;} catch (AlipayApiException e) {log.error("AlipayServiceImpl----->支付宝生成表单错误");e.printStackTrace();return "调用失败";}}