微信公众号支付java版本

水深无声 2022-04-10 11:08 286阅读 0赞

回调函数

@RequestMapping("/toPay")
    	public String toPay(HttpServletRequest request, HttpServletResponse response, Model model){
    		System.out.println("toPay success");
    		try {
    			String orderId = request.getParameter("orderId");
    			System.out.println("in toPay,orderId:" + orderId);
    			
    			String totalFeeStr = request.getParameter("totalFee");
    			Float totalFee = 0.0f;
    			
    			if(StringUtils.isNotBlank(totalFeeStr)){
    				totalFee = new Float(totalFeeStr);
    			}
    
    			//网页授权后获取传递的参数
    			//String userId = request.getParameter("userId"); 	
    			String code = request.getParameter("code");
    			System.out.println("code:"+code);
    			//System.out.println("userId:"+userId);
    			
    			//获取统一下单需要的openid
    			String openId ="";
    			String URL = "https://api.weixin.qq.com/sns/oauth2/access_token?appid="
    					+ WxPayConfig.appid + "&secret=" + WxPayConfig.appsecret + "&code=" + code + "&grant_type=authorization_code";
    			System.out.println("URL:"+URL);
    			JSONObject jsonObject = CommonUtil.httpsRequest(URL, "GET", null);
    			if (null != jsonObject) {
    				openId = jsonObject.getString("openid");
    				System.out.println("openId:" + openId);
    			}
    			
    			//获取openId后调用统一支付接口https://api.mch.weixin.qq.com/pay/unifiedorder
    			//随机数 
    			//String nonce_str = "1add1a30ac87aa2db72f57a2375d8fec";
    			String nonce_str = UUID.randomUUID().toString().replaceAll("-", "");
    			//商品描述
    			String body = orderId;
    			//商户订单号
    			String out_trade_no = orderId;
    			//订单生成的机器 IP
    			String spbill_create_ip = request.getRemoteAddr();
    			//总金额
    			//TODO
    			Integer total_fee = Math.round(totalFee*100);
    			//Integer total_fee = 1;
    			
    			//商户号
    			//String mch_id = partner;
    			//子商户号  非必输
    			//String sub_mch_id="";
    			//设备号   非必输
    			//String device_info="";
    			//附加数据
    			//String attach = userId;
    			//总金额以分为单位，不带小数点
    			//int total_fee = intMoney;
    			//订 单 生 成 时 间   非必输
    			//String time_start ="";
    			//订单失效时间      非必输
    			//String time_expire = "";
    			//商品标记   非必输
    			//String goods_tag = "";
    			//非必输
    			//String product_id = "";
    					
    			//这里notify_url是 支付完成后微信发给该链接信息，可以判断会员是否支付成功，改变订单状态等。
    			String notify_url = baseUrl + "/wx/notifyUrl.do";
    			
    			SortedMap<String, String> packageParams = new TreeMap<String, String>();
    			packageParams.put("appid", WxPayConfig.appid);
    			packageParams.put("mch_id", WxPayConfig.partner);
    			packageParams.put("nonce_str", nonce_str);
    			packageParams.put("body", body);
    			packageParams.put("out_trade_no", out_trade_no);
    			packageParams.put("total_fee", total_fee+"");
    			packageParams.put("spbill_create_ip", spbill_create_ip);
    			packageParams.put("notify_url", notify_url);
    			packageParams.put("trade_type", WxPayConfig.trade_type);  
    			packageParams.put("openid", openId);  
    
    			RequestHandler reqHandler = new RequestHandler(request, response);
    			reqHandler.init(WxPayConfig.appid, WxPayConfig.appsecret, WxPayConfig.partnerkey);
    			
    			String sign = reqHandler.createSign(packageParams);
    			System.out.println("sign:"+sign);
    			String xml="<xml>"+
    					"<appid>"+WxPayConfig.appid+"</appid>"+
    					"<mch_id>"+WxPayConfig.partner+"</mch_id>"+
    					"<nonce_str>"+nonce_str+"</nonce_str>"+
    					"<sign>"+sign+"</sign>"+
    					"<body><![CDATA["+body+"]]></body>"+
    					"<out_trade_no>"+out_trade_no+"</out_trade_no>"+
    					"<total_fee>"+total_fee+""+"</total_fee>"+
    					"<spbill_create_ip>"+spbill_create_ip+"</spbill_create_ip>"+
    					"<notify_url>"+notify_url+"</notify_url>"+
    					"<trade_type>"+WxPayConfig.trade_type+"</trade_type>"+
    					"<openid>"+openId+"</openid>"+
    					"</xml>";
    			System.out.println("xml："+xml);
    			
    			String createOrderURL = "https://api.mch.weixin.qq.com/pay/unifiedorder";
    			String prepay_id="";
    			try {
    				prepay_id = WeixinPayUtil.getPayNo(createOrderURL, xml);
    				System.out.println("prepay_id:" + prepay_id);
    				if(prepay_id.equals("")){
    					request.setAttribute("ErrorMsg", "统一支付接口获取预支付订单出错");
    					response.sendRedirect("error.jsp");
    				}
    			} catch (Exception e1) {
    				e1.printStackTrace();
    			}
    			SortedMap<String, String> finalpackage = new TreeMap<String, String>();
    			String timestamp = Sha1Util.getTimeStamp();
    			String packages = "prepay_id="+prepay_id;
    			finalpackage.put("appId", WxPayConfig.appid);
    			finalpackage.put("timeStamp", timestamp);
    			finalpackage.put("nonceStr", nonce_str);
    			finalpackage.put("package", packages);
    			finalpackage.put("signType", WxPayConfig.signType);
    			String finalsign = reqHandler.createSign(finalpackage);
    			System.out.println("/jsapi?appid="+WxPayConfig.appid+"&timeStamp="+timestamp+"&nonceStr="+nonce_str+"&package="+packages+"&sign="+finalsign);
    			
    			model.addAttribute("appid", WxPayConfig.appid);
    			model.addAttribute("timeStamp", timestamp);
    			model.addAttribute("nonceStr", nonce_str);
    			model.addAttribute("packageValue", packages);
    			model.addAttribute("sign", finalsign);
    			
    			model.addAttribute("bizOrderId", orderId);
    			model.addAttribute("orderId", orderId);
    			model.addAttribute("payPrice", total_fee);
    			System.out.println("orderId:---------------"+orderId);
    			return "/jsapi";
    		} catch (NumberFormatException e) {
    			e.printStackTrace();
    		}
    		return null;
    	}