java微信扫码支付

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java 后台

/** * 微信扫码支付 * @param request * @param response * @return * @throws IOException */@RequestMapping(value="/weiXinSaoMaPay",method=RequestMethod.POST)@ResponseBodypublic String weiXinSaoMaPay(HttpServletRequest request,HttpServletResponse response) throws IOException {//获取单号和金额String hunhe = "";String appid = "";String appsecret = "";String mch_id = "";String partnerkey = "";String wangzhi = "";// 获取openId后调用统一支付接口https://api.mch.weixin.qq.com/pay/unifiedorderString currTime = TenpayUtil.getCurrTime();// 8位日期String strTime = currTime.substring(8, currTime.length());// 四位随机数String strRandom = TenpayUtil.buildRandom(4) + "";// 10位序列号,可以自行调整。String strReq = strTime + strRandom;// System.out.println("商户号:" + mch_id);// 随机数String nonce_str = strReq;// 商品描述根据情况修改String body = "批发";String[] shunzu = hunhe.split(",");// 商户订单号String out_trade_no = shunzu[0];// 金额转化为分为单位float sessionmoney = Float.parseFloat(shunzu[1]);String finalmoney = String.format("%.2f", sessionmoney);finalmoney = finalmoney.replace(".", "");int intMoney = Integer.parseInt(finalmoney);// 总金额以分为单位，不带小数点int total_fee = intMoney;// 订单生成的机器 IPString spbill_create_ip = localIp();// 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 = wangzhi + "/getChuliShuJu.do";String trade_type = "NATIVE";SortedMap<String, Object> packageParams = new TreeMap<String, Object>();packageParams.put("appid", appid);packageParams.put("mch_id", mch_id);packageParams.put("nonce_str", nonce_str);packageParams.put("body", body);packageParams.put("out_trade_no", out_trade_no);// 这里写的金额为1 分到时修改packageParams.put("total_fee", "1");packageParams.put("spbill_create_ip", spbill_create_ip);packageParams.put("notify_url", notify_url);packageParams.put("trade_type", trade_type);RequestHandler reqHandler = new RequestHandler(request, response);reqHandler.init(appid, appsecret, partnerkey);String sign = reqHandler.createSign(packageParams);String xml = "<xml>" + "<appid>" + appid + "</appid>" + "<mch_id>"+ mch_id + "</mch_id>" + "<nonce_str>" + nonce_str+ "</nonce_str>" + "<sign>" + sign + "</sign>"+ "<body><![CDATA[" + body + "]]></body>"+ "<out_trade_no>"+ out_trade_no+ "</out_trade_no>"+// 金额，这里写的1 分到时修改"<total_fee>" + 1 + "</total_fee>" + "<spbill_create_ip>"+ spbill_create_ip + "</spbill_create_ip>" + "<notify_url>"+ notify_url + "</notify_url>" + "<trade_type>" + trade_type+ "</trade_type>"+"</xml>";GetWxOrderno gd = new GetWxOrderno();//返回的二维码调用链接String code_url = gd.getPayNo("https://api.mch.weixin.qq.com/pay/unifiedorder", xml,"code_url");return code_url;}

获取本机ip

<pre name="code" class="java">/**     * 获取本机Ip      *       *  通过 获取系统所有的networkInterface网络接口 然后遍历 每个网络下的InterfaceAddress组。     *  获得符合 <code>InetAddress instanceof Inet4Address</code> 条件的一个IpV4地址     * @return     */    @SuppressWarnings("rawtypes")    private String localIp(){        String ip = null;        Enumeration allNetInterfaces;        try {            allNetInterfaces = NetworkInterface.getNetworkInterfaces();                        while (allNetInterfaces.hasMoreElements()) {                NetworkInterface netInterface = (NetworkInterface) allNetInterfaces.nextElement();                List<InterfaceAddress> InterfaceAddress = netInterface.getInterfaceAddresses();                for (InterfaceAddress add : InterfaceAddress) {                    InetAddress Ip = add.getAddress();                    if (Ip != null && Ip instanceof Inet4Address) {                        ip = Ip.getHostAddress();                    }                }            }        } catch (Exception e) {                 System.out.println("获取本机Ip失败:异常信息:"+e.getMessage());        }        return ip;    }

jsp前端

<pre name="code" class="html"><%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>测试扫码支付</title><script type="text/javascript"src="${pageContext.request.contextPath}/js2/jquery-1.4.2.min.js"></script><script src="../js/qrcode.js"></script></head><body><div align="center" id="qrcode"></div></body><script type="text/javascript">$.post("${pageContext.request.contextPath}/weiXinSaoMaPay.do",function(re) {//这个地址是Demo.java生成的code_url,这个很关键var url = re;//参数1表示图像大小，取值范围1-10；参数2表示质量，取值范围'L','M','Q','H'var qr = qrcode(10, 'M');qr.addData(url);qr.make();var dom = document.createElement('DIV');dom.innerHTML = qr.createImgTag();var element = document.getElementById("qrcode");element.appendChild(dom);});</script></html>

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