<!-- 支付寶支付依賴 -->
<dependency>
 <groupId>com.pentahohub.nexus</groupId>
 <artifactId>alipay-sdk-java</artifactId>
 <version>20170615110434</version>
 <scope>system</scope>
 <systemPath>${basedir}/libs/alipay-sdk-java20170615110434.jar</systemPath>
</dependency>
<dependency>
 <groupId>commons-logging</groupId>
 <artifactId>commons-logging</artifactId>
 <version>1.1.1</version>
</dependency>

/**
* account 總金額
* sid 用戶id
* desc 節點id
* @param request
* @return
*/
@RequestMapping(value="/pay/alipay/signprams",produces="application/json;charset=utf-8")
@ResponseBody
public String signprams(HttpServletRequest request){
String res = "{code:404}";
try{
 String totalAmount = request.getParameter("account");
 String sid = request.getParameter("sid");
 String nid = request.getParameter("desc");
 String subject = "電費充值";
 String body = "貴大電費預付費充值";
 String prefix = "ALE"+sid+"E";
 String out_trade_no = WXRequestUtil.getTradeNo(prefix);
 
 //實例化客戶端
 AlipayClient alipayClient = new DefaultAlipayClient("https://openapi.alipay.com/gateway.do 
",
 AlipayUtil.APPID, AlipayUtil.PRIVATE_KEY, "json", AlipayUtil.CHARSET, AlipayUtil.PUBLIC_KEY, "RSA2");
 //實例化具體API對應的request類,類名稱和接口名稱對應,當前調用接口名稱：alipay.trade.app.pay
 AlipayTradeAppPayRequest alirequest = new AlipayTradeAppPayRequest();
 //SDK已經封裝掉了公共參數，這里只需要傳入業務參數。以下方法為sdk的model入參方式(model和biz_content同時存在的情況下取biz_content)。
 AlipayTradeAppPayModel model = new AlipayTradeAppPayModel();
 model.setPassbackParams(URLEncoder.encode(body.toString()));; //描述信息 添加附加數據
 model.setSubject(subject); //商品標題
 model.setOutTradeNo(out_trade_no); //商家訂單編號
 model.setTimeoutExpress("30m"); //超時關閉該訂單時間
 model.setTotalAmount(totalAmount); //訂單總金額
 model.setProductCode("QUICK_MSECURITY_PAY"); //銷售產品碼，商家和支付寶簽約的產品碼，為固定值QUICK_MSECURITY_PAY
 alirequest.setBizModel(model);
 alirequest.setNotifyUrl("http://pay.gzdxfszx.com/pay/alipay/notify.xs 
"); //回調地址
 String orderStr = "";
 try {
 //這里和普通的接口調用不同，使用的是sdkExecute
 AlipayTradeAppPayResponse response = alipayClient.sdkExecute(alirequest);
 orderStr = response.getBody();
//  System.out.println(orderStr);//就是orderString 可以直接給客戶端請求，無需再做處理。
 } catch (AlipayApiException e) {
 e.printStackTrace();
 }
 
 String sign = MD5Encode.encode(out_trade_no);
 savePayLog(out_trade_no,totalAmount,sid,body, sign,nid,1);
 
 JSONObject resObj = new JSONObject();
 resObj.put("code",ResponseCode.HTTP_SUCCESS);
 resObj.put("out_trade_no",out_trade_no);
 resObj.put("sign",sign);
 resObj.put("orderStr",orderStr);
 
 res = resObj.toJSONString();
}catch (Exception e){
 e.printStackTrace();
}
return res;
}

@RequestMapping(value="/pay/alipay/notify",produces="application/json;charset=utf-8")
 @ResponseBody
 public String notify(HttpServletRequest request){
 Map requestParams = request.getParameterMap();
 System.out.println("支付寶支付結果通知"+requestParams.toString());
 //獲取支付寶POST過來反饋信息
 Map<String,String> params = new HashMap<String,String>();
 
 for (Iterator iter = requestParams.keySet().iterator(); iter.hasNext();) {
  String name = (String) iter.next();
  String[] values = (String[]) 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。
  //valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
  params.put(name, valueStr);
 }
 //切記alipaypublickey是支付寶的公鑰，請去open.alipay.com 
 
對應應用下查看。
 //boolean AlipaySignature.rsaCheckV1(Map<String, String> params, String publicKey, String charset, String sign_type)
 try {
  //驗證簽名
  boolean flag = AlipaySignature.rsaCheckV1(params, AlipayUtil.PUBLIC_KEY, AlipayUtil.CHARSET, "RSA2");
  if(flag){
  if("TRADE_SUCCESS".equals(params.get("trade_status"))){
//   //付款金額
//   String amount = params.get("buyer_pay_amount");
//   //支付寶交易號
//   String trade_no = params.get("trade_no");
//   //附加數據
//   String passback_params = URLDecoder.decode(params.get("passback_params"));
 
   //商戶訂單號
   String out_trade_no = params.get("out_trade_no");
   updateOrderInfo(out_trade_no,MD5Encode.encode(out_trade_no));
  }
  }
 } catch (AlipayApiException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 }
 return "success";
 }

-(void)aliPay
{
 [MBProgressHUD showMessage:@"跳轉中，請稍候"];
 NSString *appScheme = @"alisdkdemo";
 
 NSString *userUrlStr = [NSString stringWithFormat:@"%@?sid=%@&account=%@&desc=%@", ALI_PREPAY_URL, self.student.sid,self.payJinE,self.student.nid];
 NSURL *url = [NSURL URLWithString:userUrlStr];
 // NSLog(@"userUrlStr = %@", userUrlStr);
 
 NSURLRequest *request = [NSURLRequest requestWithURL:url];
 AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]initWithRequest:request];
 
 [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, NSDictionary *responseObject) {
 [MBProgressHUD hideHUD];
 
//   NSLog(@"支付寶支付的response = %@", operation.responseString);
 NSData *JSONData = [operation.responseString dataUsingEncoding:NSUTF8StringEncoding];
 NSDictionary *userDict = [NSJSONSerialization JSONObjectWithData:JSONData options:NSJSONReadingMutableLeaves error:nil];
 
 NSString *orderString = [userDict objectForKey:@"orderStr"];
 self.sign = [userDict objectForKey:@"sign"];
 self.ordnum = [userDict objectForKey:@"out_trade_no"];
 
 [[AlipaySDK defaultService] payOrder:orderString fromScheme:appScheme callback:^(NSDictionary *resultDic) {
  NSLog(@"reslut = %@",resultDic);
  [MBProgressHUD hideHUD];
  
  NSString *resultStatus = [resultDic objectForKey:@"resultStatus"];
  if([resultStatus isEqualToString:@"9000"]){
  // 支付成功，更新用戶信息
  [self payDidFinish];
  }else{
  // 支付失敗，
  [self setupAlertControllerWithTitle:@"支付寶支付結果" messge:@"本次支付未完成，您可以稍后重試！" confirm:@"好的"];
  }
  
 }];
 }failure:^(AFHTTPRequestOperation *operation, NSError *error) {
 [MBProgressHUD hideHUD];
 NSLog(@"發生錯誤！%@",error);
 }];
 NSOperationQueue *queue = [[NSOperationQueue alloc] init];
 [queue addOperation:operation];
 
 
 
}