对接支付宝支付通道接口

/请求地址
	private static String URL = "https://openapi.alipay.com/gateway.do";
	
	//支付宝分配给开发者的应用ID
	private static String APP_ID = ""; 
	
	//编码格式
	private static String CHARSET = "utf-8"; 
	
	//私钥
	private static String APP_PRIVATE_KEY =""; 
	
	//支付宝公钥
	private static String ALIPAY_PUBLIC_KEY =""; 
	
	static AlipayClient alipayClient = new DefaultAlipayClient(URL,APP_ID,APP_PRIVATE_KEY,"json",CHARSET,ALIPAY_PUBLIC_KEY,"RSA2");

public  void  transferpay(HttpServletRequest httpRequest,
            HttpServletResponse httpResponse) throws ServletException, IOException {
		String out_trade_no = httpRequest.getParameter("out_trade_no");//订单编号
		String total_amount = httpRequest.getParameter("total_amount");//订单金额
		String return_url = "";//成功页面
			return_url = "http://testwww";
		Map<String, String> map1 = new LinkedHashMap<String, String>();
		//商户订单号，64个字符以内、可包含字母、数字、下划线
		map1.put("out_trade_no", out_trade_no);
		//销售产品码，与支付宝签约的产品码名称。 注：目前仅支持FAST_INSTANT_TRADE_PAY
		map1.put("product_code", "FAST_INSTANT_TRADE_PAY");
		// 订单总金额，单位为元，精确到小数点后两位，取值范围[0.01,100000000]
		map1.put("total_amount", total_amount);
		// 订单总金额，单位为元，精确到小数点后两位，取值范围[0.01,100000000]
		map1.put("subject", "商品订单");
		//该笔订单允许的最晚付款时间，逾期将关闭交易。取值范围：1m～15d。
		map1.put("timeout_express", "5m");
		//编码格式gbk，RSA2签名算法
		AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();//创建API对应的request
		String json = JsonUtil.map2Json(map1);
		alipayRequest.setReturnUrl(return_url);
		//回调地址 支付宝服务器主动通知商户服务器里指定的页面http/https路径。建议商户使用https
	    alipayRequest.setNotifyUrl("http://testwww");//在公共参数中设置回跳和通知地址
		alipayRequest.setBizContent(json);
		String form="";
		try {
			form = alipayClient.pageExecute(alipayRequest).getBody(); //调用SDK生成表单
			httpRequest.setAttribute("result",form);
			httpRequest.setAttribute("retCode",0000);
			httpRequest.setAttribute("msg","订单生成成功");
		} catch (AlipayApiException e) {
			httpRequest.setAttribute("retCcode",0001);
			httpRequest.setAttribute("retMsg","订单生成失败");
			e.printStackTrace();
		}
		System.out.println("form:"+form);	
		httpResponse.setContentType("text/html;charset=" + CHARSET);
	    httpResponse.getWriter().write(form);//直接将完整的表单html输出到页面
	    httpResponse.getWriter().flush();
	    httpResponse.getWriter().close();
	}

public  @ResponseBody String  apppay(HttpServletRequest httpRequest,
            HttpServletResponse httpResponse) throws ServletException, IOException {
		Map<String, String> map = new HashMap<String, String>();
		String out_trade_no = httpRequest.getParameter("out_trade_no");
		String total_amount = httpRequest.getParameter("total_amount");
		
		if(StringUtils.isEmpty(out_trade_no)) {
			return "请选择订单号";
		}
		if(StringUtils.isEmpty(total_amount)) {
			return "请选择订单金额";
		}else{
			total_amount = StringUtil.parseAmountLong2Str(Long.parseLong(total_amount));
		}
		//编码格式gbk，RSA2签名算法
		AlipayTradeAppPayRequest request = new AlipayTradeAppPayRequest();//创建API对应的request
		//SDK已经封装掉了公共参数，这里只需要传入业务参数。以下方法为sdk的model入参方式
        AlipayTradeAppPayModel model = new AlipayTradeAppPayModel();
        // 订单标题
        model.setSubject("app订单");
 		//商户订单号，64个字符以内、可包含字母、数字、下划线
        model.setOutTradeNo(out_trade_no);
 		//该笔订单允许的最晚付款时间，逾期将关闭交易。取值范围：1m～15d。m-分钟，h-小时，d-天，1c-当天（1c-当天的情况下，无论交易何时创建，都在0点关闭）。 该参数数值不接受小数点， 如 1.5h，可转换为 90m。
        //model.setTimeoutExpress("5m");
 		// 订单总金额，单位为元，精确到小数点后两位，取值范围[0.01,100000000]
        model.setTotalAmount(total_amount);
 		//销售产品码，与支付宝签约的产品码名称。 注：目前仅支持FAST_INSTANT_TRADE_PAY
        model.setProductCode("QUICK_MSECURITY_PAY");
		request.setBizModel(model);
		request.setNotifyUrl("http://testwww");
		String orderString="";
		
		try {
			 // 这里和普通的接口调用不同，使用的是sdkExecute
			AlipayTradeAppPayResponse response  = alipayClient.sdkExecute(request); //返回支付宝订单信息(预处理)
			orderString = response.getBody();//就是orderString 可以直接给APP请求，无需再做处理。
			map.put("retCode","0000");
			map.put("retMsg","订单生成成功");
			map.put("state",orderString);
			
		} catch (AlipayApiException e) {
			map.put("retCode","0001");
			map.put("retMsg","订单生成失败");
			e.printStackTrace();
		}
		String json = JsonUtil.map2Json(map);
		logger.info("orderString:"+orderString);	
		return json;
	}

public  Map<String, String>  paymentNotify(HttpServletRequest httpRequest) throws ServletException, IOException {
		logger.info("支付宝订单支付异步回调");
		Map<String, String> map = new LinkedHashMap<String, String>();
		Map<String, String> params = convertRequestParamsToMap(httpRequest); // 将异步通知中收到的待验证所有参数都存放到map中
		logger.info("订单信息："+params.toString());
		String out_trade_no = httpRequest.getParameter("out_trade_no");//商户订单号
		String trade_no = httpRequest.getParameter("trade_no");//支付宝流水号
		String seller_id = httpRequest.getParameter("seller_id");//支付宝唯一用户号
		String timestamp = httpRequest.getParameter("timestamp");//时间
		String code = httpRequest.getParameter("code");//返回码
		String msg = httpRequest.getParameter("msg");//处理结果的描述，信息来自于code返回结果的描述
		String trade_status = httpRequest.getParameter("trade_status");//TRADE_SUCCESS成功支付
		map.put("out_trade_no", out_trade_no);
		map.put("trade_no", trade_no);
		map.put("seller_id", seller_id);
		map.put("timestamp", timestamp); 
		map.put("code", code);
		map.put("msg", msg);
		if(trade_status.equals("TRADE_SUCCESS")){//支付成功
			//修改支付记录支付状态
		}
		logger.info("订单信息："+map.toString());
		return map;
	}