微信开发之微信公众号H5支付-JAVA版

    // 时间戳
                String timeStamp = new Long(WXPayUtil.getCurrentTimestamp()).toString();
                // 创建返回值
                //组装二次签名
                Map<String, String> resultMap = new HashMap<String, String>();
                resultMap.put("appId", wxResultMap.get("appid"));
                resultMap.put("timeStamp", timeStamp);
                resultMap.put("nonceStr", str);
                resultMap.put("package", "prepay_id=" + wxResultMap.get("prepay_id"));
                resultMap.put("signType", "MD5");
                // 生成签名
                String paySign = WXPayUtil.generateSignature(resultMap, config.getKey());
                resultMap.put("paySign", paySign);
                return MsgJson.getmsg(false, resultMap, "签名生成成功");

  $.ajax({
            type:"post",
            url: "/weixin/pay",
            dataType:"json",
            ontentType : "application/x-www-form-urlencoded",
            data:{orderId:'${orderId}'},
            success:function(result) {
                console.log(result);
                var data  = result;
                //var data = JSON.parse(result);
                if(data.status == '200'){
                    appId = data.data.appId;
                    paySign = data.data.paySign;
                    timeStamp = data.data.timeStamp;
                    nonceStr = data.data.nonceStr;
                    packageStr = data.data.package;
                    signType = data.data.signType;
                    callpay();
                }else{
                    alert("统一下单失败");
                }
            }
        });
    }
    function onBridgeReady(){
        WeixinJSBridge.invoke(
            'getBrandWCPayRequest', {
                "appId":appId,     //公众号名称，由商户传入
                "timeStamp":timeStamp, //时间戳，自1970年以来的秒数
                "nonceStr":nonceStr , //随机串
                "package":packageStr,  //预支付交易会话标识
                "signType":signType,     //微信签名方式
                "paySign":paySign        //微信签名
            },
            function(res){
                if(res.err_msg == "get_brand_wcpay_request:ok" ) {
                    alert('支付成功');
                    window.location.replace("/eby/index");
                }else if(res.err_msg == "get_brand_wcpay_request:cancel"){
                    alert('支付取消');
                }else if(res.err_msg == "get_brand_wcpay_request:fail" ){
                    alert('支付失败');
                } //使用以上方式判断前端返回,微信团队郑重提示：res.err_msg将在用户支付成功后返回    ok，但并不保证它绝对可靠。
            }
        );
    }
    function callpay(){
        if (typeof WeixinJSBridge == "undefined"){
            if( document.addEventListener ){
                document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
            }else if (document.attachEvent){
                document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
                document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
            }
        }else{
            onBridgeReady();
        }

 HashMap  map  = new HashMap();
        IWXPayConfig config = new IWXPayConfig();
        try {
            InputStream inStream = request.getInputStream();
            ByteArrayOutputStream outSteam = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int len = 0;
            while ((len = inStream.read(buffer)) != -1) {
                outSteam.write(buffer, 0, len);
            }
            outSteam.close();
            inStream.close();
            String resultStr = new String(outSteam.toByteArray(), "utf-8");
            Map<String, String> resultMap = WXPayUtil.xmlToMap(resultStr);//将xml转成排序之后的map
            logger.info("微信支付回调地址请求参数=requst:{}", resultMap.toString());
            String result_code = resultMap.get("result_code");//业务结果
            String is_subscribe = resultMap.get("is_subscribe");//是否关注了微信公众号
            String out_trade_no = resultMap.get("out_trade_no");//订单号
            String transaction_id = resultMap.get("transaction_id");//微信支付订单号  类似于支付宝的交易号
            String sign = resultMap.get("sign");//签名
            String total_fee = resultMap.get("total_fee");//订单总金额  单位为 分
            String openid = resultMap.get("openid");//用户在商户appid下的唯一标识
            String time_end = resultMap.get("time_end");
            String bank_type = resultMap.get("bank_type");
            //签名验证
            resultMap.remove("sign");
            String signStr =  WXPayUtil.generateSignature(resultMap,config.getKey());
            logger.warn("验证= signStr:{},sign:{}", signStr, sign);
            if (!signStr.equals(sign)) {
                logger.warn("微信支付回调地址请求参数签名验证失败= signStr:{},sign:{}", signStr, sign);
                map.put("return_code", "FAIL");
                map.put("return_msg", "sign不正确");
                return WXPayUtil.mapToXml(map);
            }
     if (result_code.equals("SUCCESS")) {
                logger.info("支付成功= 订单号:{},交易号:{}", out_trade_no, transaction_id);
                BigDecimal bigDecimal_total_fee = new BigDecimal(total_fee);
                BigDecimal bigDecimal = bigDecimal_total_fee.divide(new BigDecimal(100));
               // 支付成功处理业务逻辑
            }
  //通知微信.异步确认成功.必写.不然会一直通知后台.八次之后就认为交易失败了.
            map.put("return_code","SUCCESS");
            map.put("return_msg","OK");