微信公众号支付java版本

@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
 
   packageParams = new TreeMap
  
   (); 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="
   
    "+ "
    
     "+WxPayConfig.appid+"
    "+ "
    
     "+WxPayConfig.partner+"
    "+ "
    
     "+nonce_str+"
    "+ "
    
     "+sign+"
    "+ ""+body+""+ "
    
     "+out_trade_no+"
    "+ "
    
     "+total_fee+""+"
    "+ "
    
     "+spbill_create_ip+"
    "+ "
    
     "+notify_url+"
    "+ "
    
     "+WxPayConfig.trade_type+"
    "+ "
    
     "+openId+"
    "+ "
   "; 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
   
     finalpackage = new TreeMap
    
     (); 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; }