公众号微信支付直播室送礼物

1.h5页面通过这个接口获取预支付id

    @RequestMapping(value = "/payOrder")    @ResponseBody    public String payOrder(HttpServletRequest request, double totalFee, String body,String openId, String attach) throws Exception {        String resultString = null;        BigDecimal fee = new BigDecimal(totalFee); // 微信支付参数以分为单位。        fee = fee.multiply(new BigDecimal(100));        String payFee = fee.longValue() + "";        //1 生成预支付id        String ipAddress = request.getRemoteAddr();        String orderNumber = System.currentTimeMillis() + new Random().nextInt(100) + "";        String openid=String.valueOf(openId);        logger.info("微信支付准备"+openid+attach+"");        try {            Map<String, String> map = PayCommonUtil.getPrepayId(payFee, ipAddress, orderNumber, body, openid,attach);            String prepay_id = map.get("prepay_id");            //2 给H5页面传递参数  调起微信支付            resultString = PayCommonUtil.createPackageValue(prepay_id);        } catch (JDOMException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        return resultString;    }

2.H5页面代码如下：通过预支付id调起公众号支付

$.post("/douyalive/chatroom/payOrder",{totalFee:totle,body:"送出礼物——"+body,openId:getUserInfo().openId,attach:attach},function(data){            var _data=JSON.parse(data)            function onBridgeReady(){               WeixinJSBridge.invoke(                   'getBrandWCPayRequest', {                       "appId":_data.appId,     //公众号名称，由商户传入                            "timeStamp":_data.timeStamp,         //时间戳，自1970年以来的秒数                            "nonceStr":_data.nonceStr, //随机串                            "package":_data.package,                            "signType":_data.signType,         //微信签名方式：                            "paySign":_data.paySign //微信签名                    },                   function(res){                         if(res.err_msg == "get_brand_wcpay_request:ok" ) {                        sessionStorage.setItem("type1",2)                           ChatRoom.sendGiftI();                            console.log(11)                        }else if(res.err_msg == "get_brand_wcpay_request:cancel"){                            alert("支付取消")                        }else{                            alert("支付失败")                          }                        }               );             }            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();            }           }) 

附PayCommonUtil工具类的代码

public class PayCommonUtil {    @SuppressWarnings("unused")    private static Logger log = LoggerFactory.getLogger(PayCommonUtil.class);    //微信支付统一接口(POST)    public final static String UNIFIED_ORDER_URL = "https://api.mch.weixin.qq.com/pay/unifiedorder";    public final static String APPID = "";//服务号的应用号    public final static String MCH_ID = "";//商户号    public final static String APP_SECRECT  = "";    public final static String  API_KEY = "";//API密钥    public final static String SIGN_TYPE = "MD5";//签名加密方式    //通知回调地址    public final static String NOTIFY_URL = "http://wx.douyamovie.com/douyawechat/notice.do";    //微信支付成功支付后跳转的地址    public final static String SUCCESS_URL = "http://wx.douyamovie.com";    //订单查询接口(POST)    public final static String CHECK_ORDER_URL = "https://api.mch.weixin.qq.com/pay/orderquery";    public static String CreateNoncestr(int length) {        String chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";        String res = "";        for (int i = 0; i < length; i++) {            Random rd = new Random();            res += chars.indexOf(rd.nextInt(chars.length() - 1));        }        return res;    }    public static String CreateNoncestr() {        String chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";        String res = "";        for (int i = 0; i < 16; i++) {            Random rd = new Random();            res += chars.charAt(rd.nextInt(chars.length() - 1));        }        return res;    }    /**     * @Description：sign签名     * @param characterEncoding 编码格式     * @param parameters 请求参数     * @return     */    @SuppressWarnings("unchecked")    public static String createSign(String characterEncoding,SortedMap<Object,Object> parameters){        StringBuffer sb = new StringBuffer();        Set es = parameters.entrySet();        Iterator it = es.iterator();        while(it.hasNext()) {            Map.Entry entry = (Map.Entry)it.next();            String k = (String)entry.getKey();            Object v = entry.getValue();            if(null != v && !"".equals(v)                    && !"sign".equals(k) && !"key".equals(k)) {                sb.append(k + "=" + v + "&");            }        }        sb.append("key=" + API_KEY);        String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();        return sign;    }    /**     * @Description：将请求参数转换为xml格式的string     * @param parameters  请求参数     * @return     */    @SuppressWarnings("unchecked")    public static String getRequestXml(SortedMap<Object,Object> parameters){        StringBuffer sb = new StringBuffer();        sb.append("<xml>");        Set es = parameters.entrySet();        Iterator it = es.iterator();        while(it.hasNext()) {            Map.Entry entry = (Map.Entry)it.next();            String k = (String)entry.getKey();            String v = (String)entry.getValue();            if ("attach".equalsIgnoreCase(k)||"body".equalsIgnoreCase(k)||"sign".equalsIgnoreCase(k)) {                sb.append("<"+k+">"+"<![CDATA["+v+"]]></"+k+">");            }else {                sb.append("<"+k+">"+v+"</"+k+">");            }        }        sb.append("</xml>");        return sb.toString();    }    /**     *     * getPrepayId(调用微信统一下单接口，生成微信预支付id)     * @param totalFee    支付金额     * @param ipAddress   ip地址     * @param orderNumber 订单号     * @param body        商品或支付单简要描述     * @param openid      trade_type=JSAPI，此参数必传，用户在商户appid下的唯一标识     * @return     * @throws Exception     * @throws     */    @SuppressWarnings("unchecked")    public static Map<String, String>  getPrepayId(String totalFee,String ipAddress,String orderNumber,String body,String openid,String attach) throws Exception{        SortedMap<Object,Object> parameters = new TreeMap<Object,Object>();        parameters.put("appid", APPID);        parameters.put("mch_id", MCH_ID);        parameters.put("nonce_str", CreateNoncestr());        parameters.put("body", body);        parameters.put("out_trade_no", orderNumber);        parameters.put("total_fee", totalFee);        parameters.put("attach",attach);        parameters.put("spbill_create_ip",ipAddress);        parameters.put("notify_url",NOTIFY_URL);        parameters.put("trade_type", "JSAPI");        parameters.put("openid", openid);        String sign = PayCommonUtil.createSign("UTF-8", parameters);        parameters.put("sign", sign);        String requestXML = PayCommonUtil.getRequestXml(parameters);        String result =CommonUtil.httpsRequest(UNIFIED_ORDER_URL, "POST", requestXML);        log.info("getPrepayId"+result);        Map<String, String> map = XMLUtil.doXMLParse(result);//解析微信返回的信息，以Map形式存储便于取值        return map;    }    /**     *     * createPackageValue(调起支付)     * @param //appid     * @param //appKey     * @param prepay_id     * @return     * @throws     * @author 小帅帅     * @date  2016-7-5下午01:41:54     */    public static String createPackageValue(String prepay_id)  {        SortedMap<Object,Object> params = new TreeMap<Object,Object>();        params.put("appId", APPID);        params.put("timeStamp", Long.toString(new Date().getTime()));        params.put("nonceStr", PayCommonUtil.CreateNoncestr());        params.put("package", "prepay_id="+prepay_id);        params.put("signType", SIGN_TYPE);        String paySign =  PayCommonUtil.createSign("UTF-8", params);        params.put("packageValue", "prepay_id="+prepay_id);    //这里用packageValue是预防package是关键字在js获取值出错        params.put("paySign", paySign);                                                          //paySign的生成规则和Sign的生成规则一致        params.put("sendUrl", SUCCESS_URL);                               //付款成功后跳转的页面        String json = JSONObject.toJSONString(params);        log.info("createPackageValue"+json);        return json;    }}