微信公众号支付java版本

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 + "&amp;secret=" + WxPayConfig.appsecret + "&amp;code=" + code + "&amp;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&lt;String, String&gt; packageParams = new TreeMap&lt;String, String&gt;();
			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="&lt;xml&gt;"+
					"&lt;appid&gt;"+WxPayConfig.appid+"&lt;/appid&gt;"+
					"&lt;mch_id&gt;"+WxPayConfig.partner+"&lt;/mch_id&gt;"+
					"&lt;nonce_str&gt;"+nonce_str+"&lt;/nonce_str&gt;"+
					"&lt;sign&gt;"+sign+"&lt;/sign&gt;"+
					"&lt;body&gt;&lt;![CDATA["+body+"]]&gt;&lt;/body&gt;"+
					"&lt;out_trade_no&gt;"+out_trade_no+"&lt;/out_trade_no&gt;"+
					"&lt;total_fee&gt;"+total_fee+""+"&lt;/total_fee&gt;"+
					"&lt;spbill_create_ip&gt;"+spbill_create_ip+"&lt;/spbill_create_ip&gt;"+
					"&lt;notify_url&gt;"+notify_url+"&lt;/notify_url&gt;"+
					"&lt;trade_type&gt;"+WxPayConfig.trade_type+"&lt;/trade_type&gt;"+
					"&lt;openid&gt;"+openId+"&lt;/openid&gt;"+
					"&lt;/xml&gt;";
			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&lt;String, String&gt; finalpackage = new TreeMap&lt;String, String&gt;();
			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+"&amp;timeStamp="+timestamp+"&amp;nonceStr="+nonce_str+"&amp;package="+packages+"&amp;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;
	}
微信公众号支付java版本

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