<!-- 支付寶支付 SDK -->
<dependency>
 <groupId>com.alipay.sdk</groupId>
 <artifactId>alipay-sdk-java</artifactId>
 <version>3.7.4.ALL</version>
</dependency> 

/**
 * AlipayConfig.java
 * com.prereadweb.order.config
 * Copyright (c) 2019, 北京聚智未來科技有限公司版權所有.
 */
package com.prereadweb.order.config;
 
/**
 * @Description: 支付寶支付配置文件
 * @author: Administrator
 * @date: 2019/6/11 17:01
 */
public class AlipayConfig {
 
 // APPID
 public static String app_id = "你應用的APPID";
 
 // 生成公鑰時對應的私鑰（填自己的）
 public static String private_key = "你的秘鑰";
 
 //異步回調接口:得放到服務器上，且使用域名解析 IP
 public static String notify_url = "回調函數接口";
 
 
 //支付寶網關（注意沙箱alipaydev，正式則為 alipay）不需要修改
 public static String url = "https://openapi.alipay.com/gateway.do";
 
 //編碼類型
 public static String charset = "UTF-8";
 
 //數據類型
 public static String format = "json";
 
 // 公鑰
 public static String public_key = "你的公鑰";
 
 //簽名類型
 public static String signtype = "RSA2";
 
}

 /**
 * @Function: 去支付
 * @author: YangXueFeng
 * @Date: 2019/6/11 16:10
 */
 @RequestMapping("/gotopay")
 public Object goToPay(@Param("orderId") Long orderId){
 return alipayViewService.setGotoPayInfos(orderId);
 }

/**
 * @Function: 去支付
 * @author: YangXueFeng
 * @Date: 2019/6/11 16:11
 */
 @Override
 public Map<String, Object> setGotoPayInfos(Long orderId) {
 Map<String, Object> map = new HashMap<>();
 if(Util.isEmpty(orderId)){
 map.put("code", UserStatusEnum.EMPTY.intKey());
 map.put("msg", UserStatusEnum.EMPTY.value());
 return map;
 }
 /* 查詢訂單信息 */
 PayParameterForm payParameter = orderMapper.getPayParameter(orderId);
 AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.url, AlipayConfig.app_id, AlipayConfig.private_key, AlipayConfig.format, AlipayConfig.charset, AlipayConfig.public_key, AlipayConfig.signtype);//支付寶需要的參數serverUrl、appId、private_key、format、charset、public_key、signType
 AlipayTradeAppPayRequest request = new AlipayTradeAppPayRequest();
 AlipayTradeAppPayModel model = new AlipayTradeAppPayModel();
 model.setBody(payParameter.getTitle());//商品信息
 model.setSubject(payParameter.getTitle());//商品名稱
 model.setOutTradeNo(String.valueOf(payParameter.getOrderId()));//訂單號
 model.setTimeoutExpress("30m");//支付超時時間
/*
 model.setTotalAmount(String.valueOf(payParameter.getActualPrice()));// 支付金額
*/
 model.setTotalAmount(String.valueOf(0.01));// 支付金額
 request.setBizModel(model);
 // 回調地址(充值訂單)
 request.setNotifyUrl(AlipayConfig.notify_url);// 回調地址
 //這里和普通的接口調用不同，使用的是sdkExecute
 AlipayTradeAppPayResponse response = null;
 try {
 response = alipayClient.sdkExecute(request);
 map.put("code", UserStatusEnum.SUCCESS.intKey());
 map.put("msg", UserStatusEnum.SUCCESS.value());
 Map<String, Object> dataMap = new HashMap<>();
 dataMap.put("payPath", response.getBody());
 map.put("data", dataMap);
 return map;
 } catch (AlipayApiException e) {
 e.printStackTrace();
 }
 map.put("code", UserStatusEnum.ERROR.intKey());
 map.put("msg", UserStatusEnum.ERROR.value());
 return map;
 }

/**
 * @Function: 支付寶異步通知回調
 * @author: YangXueFeng
 * @Date: 2019/6/11 20:02
 */
 @ResponseBody
 @RequestMapping("/notify")
 public String notify(HttpServletRequest request, HttpServletResponse response) {
 return alipayViewService.notify(request, response);
 }

/**
 * @Function: 支付寶異步回調接口
 * @author: YangXueFeng
 * @Date: 2019/6/11 20:03
 */
 @Override
 public String notify(HttpServletRequest request, HttpServletResponse response) {
 Map<String, String> params = new HashMap<String, String>();
 //從支付寶回調的request域中取值
 Map<String, String[]> requestParams = request.getParameterMap();
 
 for (Iterator<String> iter = requestParams.keySet().iterator(); iter.hasNext();) {
 String name = iter.next();
 String[] values = requestParams.get(name);
 String valueStr = "";
 for (int i = 0; i < values.length; i++) {
 valueStr = (i == values.length - 1) ? valueStr + values[i] : valueStr + values[i] + ",";
 }
 // 亂碼解決，這段代碼在出現亂碼時使用。如果mysign和sign不相等也可以使用這段代碼轉化
 // valueStr = new String(valueStr.getBytes("ISO-8859-1"), "gbk");
 params.put(name, valueStr);
 }
 //商品訂單號
 String out_trade_no = request.getParameter("out_trade_no"); // 商戶訂單號
 // 當前交易狀態
 String tradeStatus = request.getParameter("trade_status"); //交易狀態
 // 支付金額
 String totalAmount = request.getParameter("total_amount"); //交易狀態
 // 支付時間
 String payDate = request.getParameter("gmt_payment"); //交易狀態
 //3.簽名驗證(對支付寶返回的數據驗證，確定是支付寶返回的)
 boolean signVerified = false;
 try {
 //3.1調用SDK驗證簽名
 signVerified = AlipaySignature.rsaCheckV1(params, AlipayConfig.public_key, AlipayConfig.charset, AlipayConfig.signtype);
 } catch (AlipayApiException e) {
 e.printStackTrace();
 }
 //返回狀態存入redis中
 //對驗簽進行處理
 if (signVerified) {
 //驗簽通過
 if(tradeStatus.equals("TRADE_SUCCESS")) {
 //支付成功后的業務處理
 OrderEntity order = orderMapper.getOrderInfo(Long.valueOf(out_trade_no));
 if(!Util.isEmpty(order)){
  order.setStatus(CalculatStaticConstant.CHECK_ONE);
  order.setCompleteTime(DateUtil.currentDate());
  orderMapper.updateOrder(order);
 }
 /* 添加支付信息 */
 OrderPayEntity orderPay = new OrderPayEntity();
 orderPay.setId(Long.valueOf(IdUtils.getPrimaryKey()));
 orderPay.setOrderId(order.getId());
 orderPay.setUserId(order.getUserId());
 orderPay.setPayPrice(Double.valueOf(totalAmount));
 orderPay.setPayType(PayTypeEnum.ALI_PAY.intKey());
 orderPay.setStatus(CalculatStaticConstant.CHECK_ONE);
 orderPay.setPayTime(payDate);
 orderMapper.saveOrderPay(orderPay);
 RedisUtil.set("ali"+out_trade_no, tradeStatus,300);
 return "success";
 }
 } else { //驗簽不通過
 System.err.println("驗簽失敗");
 return "failure";
 }
 return "failure";
 }