微信小程序开发-微信支付之免密支付（自动扣费）二小程序+java接口

接着教程1写的一些通用的接口函数，接收解析参数等我去掉了，你们自己加，给微信传输的参数看我上一个教程中链接有解释。

1、查询签约contract_id 函数，查看签约有没有效果，签约id是什么

    private Map<String, Object> _queryContract(String openid){
        Map<String, Object> signMap = new TreeMap<>(
                new Comparator<String>() {
                    public int compare(String obj1, String obj2) {
                        // 升序排序
                        return obj1.compareTo(obj2);
                    }
                }
        );
        signMap.put("appid",appid);
        signMap.put("mch_id",mch_id);
        signMap.put("openid",openid);
        signMap.put("plan_id",plan_id);
        signMap.put("version","1.0");
        String sign=getSign(signMap);

        StringBuilder XML = new StringBuilder();
        XML.append("<xml>");
        XML.append("<appid><![CDATA["+appid+"]]></appid>");
        XML.append("<mch_id><![CDATA["+mch_id+"]]></mch_id>");
        XML.append("<openid><![CDATA["+openid+"]]></openid>");
        XML.append("<plan_id><![CDATA["+plan_id+"]]></plan_id>");
        XML.append("<version><![CDATA[1.0]]></version>");
        XML.append("<sign><![CDATA["+sign+"]]></sign>");
        XML.append("</xml>");
        String xml = XML.toString();
        //  调用请求微信接口函数 并return结果
        HttpsClientUtil httpsClientUtil = new HttpsClientUtil();
        String wxResponseText = null;
        try{
            wxResponseText=httpsClientUtil.doPostXml(wxQueryContractUrl, xml);
        }catch(Exception e){
            results.put("success",false);
            results.put("msg", "_queryContract_查询签约状态请求失败");
            results.put("message", e);
            return results;
        }
        Document document = null;
        //开始解析xml字符串
        try{
            document = DocumentHelper.parseText(wxResponseText);
        }catch(Exception e){
            results.put("success",false);
            results.put("msg", "_queryContract_查询签约状态请求失败");
            results.put("message", e);
            return results;
        }
        Element root = document.getRootElement();
        Element successEl=root.element("return_code");//查询状态
        String success=successEl.getStringValue();
        if(success.equals("SUCCESS")){//此次查询成功
            Element resultCodeEL = root.element("result_code"); //业务结果
            String resultCode = resultCodeEL.getStringValue();
            if( resultCode.equals("SUCCESS") ){//判断业务结果
                //存放结果数据
                Map<String,Object> item= new HashMap<>();
                Element contractEl=root.element("contract_id");
                String contract_id=contractEl.getStringValue();
                results.put("contract_id",contract_id);
                results.put("success", true);
            }else if( resultCode.equals("FAIL") ){
                Element errCodeEl=root.element("err_code");//错误代码
                String errCode=errCodeEl.getStringValue();
                Element errCodeDesEl=root.element("err_code_des");//错误代码描述
                String errCodeDes=errCodeDesEl.getStringValue();
                results.put("success",false);
                results.put("msg",errCode);
                results.put("message", errCodeDes);
            }
        }else if(success.equals("FAIL")){
            Element msgEl=root.element("return_msg");//错误原因
            String msg=msgEl.getStringValue();
            results.put("success",false);
            results.put("msg",msg);
            results.put("message", msg);
        }
        return results;
    }

2、查询订单状态

    /查询微信订单接口selectPayOrder
    public String selectPayOrder() throws Exception {
        if(this.param==null || this.param.isEmpty()){
            try {
                this.param = getParamFromRequest();
            }catch(Exception ex){
                results.put("success", false);
                results.put("msg", "参数错误");
                results.put("message", ex.toString());
                rootLogger.error("getUserStatus--------传入参数有误!");
                rootLogger.error(ex);
                return JSON;
            }
            if( this.param==null ){
                results.put("success", false);
                results.put("msg", "参数不足");
                results.put("message", "缺失参数param");
                rootLogger.error("getUserStatus------传入参数不足，获取不到用户信息！");
                return JSON;
            }
        }
        Object param_deserialize;
        try {
            param_deserialize = JSONUtil.deserialize(this.param);
        }catch (Exception e){
            results.put("success", false);
            results.put("msg", "参数解析错误");
            results.put("message", e.getMessage());
            rootLogger.error("getUserStatus------参数解析错误！");
            rootLogger.error(e);
            return JSON;
        }

        Map<String, Object> queryMap = null;
        try {
            queryMap = (Map<String, Object>)param_deserialize;
        } catch (ClassCastException ex1) {
            results.put("success", false);
            results.put("msg", "参数解析错误");
            results.put("message", ex1.getMessage());
            rootLogger.error("getUserStatus------用户信息参数解析错误！");
            rootLogger.error(ex1);
            return JSON;
        }
        if(queryMap.get("orderNo").equals("")||queryMap.get("orderNo")==null){
            results.put("success", false);
            results.put("msg", "传入订单号为空");
            return JSON;
        }
        // ****  从传入对象中获取订单号
        String orderNo=(String) queryMap.get("orderNo");
        String nonce_str= MD5Utils.getNonceStr(32);//随机字符串
        // **** 将所有参数组装成map排序
        Map<String, Object> signMap = new TreeMap<String, Object>(
                new Comparator<String>() {
                    public int compare(String obj1, String obj2) {
                        // 升序排序
                        return obj1.compareTo(obj2);
                    }
                }
        );
        signMap.put("appid",appid);
        signMap.put("mch_id",mch_id);
        signMap.put("out_trade_no",orderNo);
        signMap.put("nonce_str",nonce_str);
        //调用组合签名字符串函数，获取签名结果
        String sign=getSign(signMap);
        // ****: 开始拼接xml
        StringBuilder XML = new StringBuilder();
        XML.append("<xml>");
        XML.append("<appid><![CDATA["+appid+"]]></appid>");
        XML.append("<mch_id><![CDATA["+mch_id+"]]></mch_id>");
        XML.append("<out_trade_no><![CDATA["+orderNo+"]]></out_trade_no>");
        XML.append("<nonce_str><![CDATA["+nonce_str+"]]></nonce_str>");
        XML.append("<sign><![CDATA["+sign+"]]></sign>");
        XML.append("</xml>");
        String xml = XML.toString();
        // ****: 调用请求微信接口函数 并return结果
        HttpsClientUtil httpsClientUtil = new HttpsClientUtil();
        // **** 开始调用请求微信接口
        try {
            //请求微信接口，储存结果
            String wxResponseText = httpsClientUtil.doPostXml(wxQueryOrderUrl, xml);
            //开始解析xml字符串
            Document document = DocumentHelper.parseText(wxResponseText);
            Element root = document.getRootElement();
            Element successEl=root.element("return_code");
            String success=successEl.getStringValue();
            Element msgEl=root.element("return_msg");
            String msg=msgEl.getStringValue();//getTextTrim
            //开始判断结果
            if(success.equals("SUCCESS")){//判断握手结果
                Element resultCodeEl=root.element("result_code");
                String resultCode=resultCodeEl.getStringValue();
                if( resultCode.equals("SUCCESS") ){//判断业务结果
                    Element openidEl=root.element("openid");
                    String openid=openidEl.getStringValue();
                    Element trade_stateEl=root.element("trade_state");
                    String trade_state=trade_stateEl.getStringValue();
                    Element total_feeEl=root.element("total_fee");
                    String total_fee=total_feeEl.getStringValue();
                    Element transaction_idEl=root.element("transaction_id");
                    String transaction_id=transaction_idEl.getStringValue();
                    Map<String,Object> item= new HashMap<String,Object>();
                    item.put("orderNo",orderNo);
                    item.put("openid",openid);
                    item.put("trade_state",trade_state);
                    item.put("total_fee",total_fee);
                    item.put("transaction_id",transaction_id);
                    results.put("success",true);
                    results.put("data",item);
                }else if( resultCode.equals("FAIL") ){
                    Element errCodeEl=root.element("err_code");//错误代码
                    String errCode=errCodeEl.getStringValue();
                    Element errCodeDesEl=root.element("err_code_des");//错误代码描述
                    String errCodeDes=errCodeDesEl.getStringValue();
                    results.put("success", false);
                    results.put("msg", errCodeDes);
                    results.put("message", errCode);

                }
            }else if(success.equals("FAIL")){
                results.put("success", false);
                results.put("msg", "请求微信接口出错");
                results.put("message", msg);
            }
        }catch (Exception e){
            results.put("success", false);
            results.put("msg", "请求微信接口出错");
            results.put("message", e.getMessage());
            rootLogger.error("请求微信接口出错");
            rootLogger.error(e);
        }
        return JSON;
    }

3、申请退款

    // 申请退款接口
    public String refundOrder() throws Exception{
        if(this.param==null || this.param.isEmpty()){
            this.param=getParamFromRequest();
            if( this.param==null ){
                results.put("success", false);
                results.put("msg", "参数不足");
                results.put("message", "缺失参数param");
                rootLogger.error("queryState-------缺失参数param");
                return JSON;
            }
        }
        Object param_deserialize;
        try {
            param_deserialize = JSONUtil.deserialize(param);
        }catch (Exception e){
            results.put("success", false);
            results.put("msg", "参数解析错误");
            results.put("message", e.getMessage());
            rootLogger.error("queryState-------参数解析错误！");
            rootLogger.error(e);
            return JSON;
        }

        Map<String, String> paramMap;
        try{
            paramMap = (Map<String, String>)param_deserialize;
        }catch(ClassCastException ex2){
            results.put("success", false);
            results.put("msg", "参数格式不正确");
            results.put("message", ex2.getMessage());
            rootLogger.error("queryState-------参数格式不正确！");
            rootLogger.error(ex2);
            return JSON;
        }

        //验证签名**验签方面伍勇做....

        //开始获取参数并判断
        int total_fee=Integer.parseInt( paramMap.get("amount") );//订单金额
        int refund_fee=Integer.parseInt( paramMap.get("refund_fee") );//退款金额
        String out_refund_no=paramMap.get("out_refund_no");//退款商户订单号-商户系统内部的退款单号唯一
        String transaction_id=paramMap.get("transaction_id");//微信支付订单号
        //生成随机字符串
        String nonce_str= MD5Utils.getNonceStr(32);//随机字符串
        //下面这些是存数据库用
        String openid=paramMap.get("openid");
        String time=paramMap.get("time");
        String orderNo=paramMap.get("orderNo");
        String lineName=paramMap.get("lineName");
        String stationName=paramMap.get("stationName");
        String start_station=paramMap.get("start_station");
        String end_station=paramMap.get("end_station");
        // TODO: 签名数据源
        Map<String,Object> refundData=new TreeMap<String, Object>(
                new Comparator<String>() {
                    public int compare(String obj1, String obj2) {
                        // 升序排序
                        return obj1.compareTo(obj2);
                    }
                });
        refundData.put("appid",appid);
        refundData.put("mch_id",mch_id);
        refundData.put("nonce_str",nonce_str);
        refundData.put("transaction_id",transaction_id);
        refundData.put("out_refund_no",out_refund_no);
        refundData.put("total_fee",total_fee);
        refundData.put("refund_fee",refund_fee);
        //调用组合签名字符串函数，获取签名结果
        String sign=getSign(refundData);

        // TODO: 开始拼接xml
        StringBuilder XML = new StringBuilder();
        XML.append("<xml>");
        XML.append("<appid><![CDATA["+appid+"]]></appid>");
        XML.append("<mch_id><![CDATA["+mch_id+"]]></mch_id>");
        XML.append("<nonce_str><![CDATA["+nonce_str+"]]></nonce_str>");
        XML.append("<transaction_id><![CDATA["+transaction_id+"]]></transaction_id>");
        XML.append("<out_refund_no><![CDATA["+out_refund_no+"]]></out_refund_no>");
        XML.append("<total_fee><![CDATA["+total_fee+"]]></total_fee>");
        XML.append("<refund_fee><![CDATA["+refund_fee+"]]></refund_fee>");
        XML.append("<sign><![CDATA["+sign+"]]></sign>");
        XML.append("</xml>");
        String xml = XML.toString();
        // TODO: 调用请求微信接口函数 并return结果
        try{
            HttpsClientUtil httpsClientUtil = new HttpsClientUtil();
            String wxResponseText= httpsClientUtil.doPostXml(wxRefundUrl, xml);
            //开始解析xml字符串
            Document document = DocumentHelper.parseText(wxResponseText);
            Element root = document.getRootElement();
            Element returnCodeEL=root.element("return_code");//握手状态
            String returnCode=returnCodeEL.getStringValue();
            Element returnMsgEl;
            String returnMsg;
            if(returnCode.equals("SUCCESS")){//判断握手结果
                //握手成功
                Element resultCodeEl=root.element("result_code");
                String resultCode=resultCodeEl.getStringValue();
                if(resultCode.equals("SUCCESS")){//判断业务结果
                    //获取结果数据
                    Element refundIdEl=root.element("refund_id");
                    String refundId=refundIdEl.getStringValue();
                    //返回给前台
                    results.put("refundId",refundId);
                    results.put("success",true);
                    //申请成功 开始储存数据库表
                    Map<String,String> saveData= new HashMap<String,String>();
                    saveData.put("transactionId",transaction_id);
                    saveData.put("total_fee",(total_fee+"") );
                    saveData.put("refund_fee",(refund_fee+"") );
                    saveData.put("out_refund_no",out_refund_no );
                    saveData.put("refund_id",refundId );
                    saveData.put("openid",openid);//
                    saveData.put("time",time);
                    saveData.put("orderNo",orderNo);
                    saveData.put("lineName",lineName );
                    saveData.put("stationName",stationName);//
                    saveData.put("start_station",start_station);
                    saveData.put("end_station",end_station);
                    //开始调用sql
                    try{
                        dbExecutor.insert("com.sutpc.dao.PayDao.saveRefundOrder",saveData);
                    }catch (Exception e){
                        rootLogger.error("doWxPay-----存储失败！");
                        rootLogger.error(e);
                    }
                }else if(resultCode.equals("FAIL")){
                    Element errCodeEl=root.element("err_code");//错误代码
                    String errCode=errCodeEl.getStringValue();
                    Element errCodeDesEl=root.element("err_code_des");//错误代码描述
                    String errCodeDes=errCodeDesEl.getStringValue();
                    results.put("success",false);
                    results.put("message",errCode);
                    results.put("msg", errCodeDes);
                }
            }else if(returnCode.equals("FAIL")){
                //握手失败
                returnMsgEl=root.element("return_msg");
                returnMsg=returnMsgEl.getStringValue();
                results.put("success",false);
                results.put("msg","请求微信失败");
                results.put("message",returnMsg);
            }
        }catch (Exception e){
            results.put("success",false);
            results.put("msg","请求微信失败");
            results.put("message","微信拒接请求，未安装证书");
        }
        return JSON;
    }

4、查询退款结果

    // 查询退款结果 wxSelectRefund
    public String selectRefund() throws Exception{
        if(this.param==null || this.param.isEmpty()){
            this.param=getParamFromRequest();
            if( this.param==null ){
                results.put("success", false);
                results.put("msg", "参数不足");
                results.put("message", "缺失参数param");
                rootLogger.error("queryState-------缺失参数param");
                return JSON;
            }
        }
        Object param_deserialize;
        try {
            param_deserialize = JSONUtil.deserialize(param);
        }catch (Exception e){
            results.put("success", false);
            results.put("msg", "参数解析错误");
            results.put("message", e.getMessage());
            rootLogger.error("queryState-------参数解析错误！");
            rootLogger.error(e);
            return JSON;
        }

        Map<String, String> paramMap;
        try{
            paramMap = (Map<String, String>)param_deserialize;
        }catch(ClassCastException ex2){
            results.put("success", false);
            results.put("msg", "参数格式不正确");
            results.put("message", ex2.getMessage());
            rootLogger.error("selectRefund-------参数格式不正确！");
            rootLogger.error(ex2);
            return JSON;
        }
        String refund_id=paramMap.get("refund_id");
        if(refund_id.equals("") || refund_id==null){
            results.put("success", false);
            results.put("msg", "参数不正确");
            results.put("message", "refund_id is null");
            rootLogger.error("selectRefund-------缺少refund_id参数！");
            return JSON;
        }
        // TODO: 签名数据源
        Map<String,Object> selectRefundData=new TreeMap<String, Object>(
                new Comparator<String>() {
                    public int compare(String obj1, String obj2) {
                        // 升序排序
                        return obj1.compareTo(obj2);
                    }
                });
        selectRefundData.put("appid",appid);
        selectRefundData.put("mch_id",mch_id);
        selectRefundData.put("refund_id",refund_id);
        //生成随机字符串
        String nonce_str= MD5Utils.getNonceStr(32);//随机字符串
        selectRefundData.put("nonce_str",nonce_str);
        String sign=getSign(selectRefundData);
        // TODO: 开始拼接xml
        StringBuilder XML = new StringBuilder();
        XML.append("<xml>");
        XML.append("<appid><![CDATA["+appid+"]]></appid>");
        XML.append("<mch_id><![CDATA["+mch_id+"]]></mch_id>");
        XML.append("<nonce_str><![CDATA["+nonce_str+"]]></nonce_str>");
        XML.append("<refund_id><![CDATA["+refund_id+"]]></refund_id>");
        XML.append("<sign><![CDATA["+sign+"]]></sign>");
        XML.append("</xml>");
        String xml = XML.toString();
        try{
            HttpsClientUtil httpsClientUtil = new HttpsClientUtil();
            String wxResponseText= httpsClientUtil.doPostXml(wxSelectRefund, xml);
            //开始解析xml字符串
            Document document = DocumentHelper.parseText(wxResponseText);
            Element root = document.getRootElement();
            Element returnCodeEL=root.element("return_code");//握手状态
            String returnCode=returnCodeEL.getStringValue();
            Element returnMsgEl;
            String returnMsg;
            if(returnCode.equals("SUCCESS")){//判断握手结果
                //握手成功
                Element resultCodeEl=root.element("result_code");
                String resultCode=resultCodeEl.getStringValue();
                if(resultCode.equals("SUCCESS")){//判断业务结果
                    //获取结果数据
                    Element refundStatusEl=root.element("refund_status_0");
                    String refundStatus=refundStatusEl.getStringValue();
                    Element refundRecvAccoutEl=root.element("refund_recv_accout_0");
                    String refundRecvAccout=refundRecvAccoutEl.getStringValue();
                    //返回给前台
                    results.put("refund_status",refundStatus);
                    results.put("refund_recv_accout",refundRecvAccout);
                    results.put("refund_id",refund_id);
                    results.put("success",true);
                    //申请成功 开始储存数据库表
                    Map<String,String> saveData= new HashMap<String,String>();
                    saveData.put("refund_status",refundStatus);//状态 SUCCESS—退款成功 FAIL—退款失败 PROCESSING—退款处理中 NOTSURE—未确定，需要商户原退款单号重新发起
                    saveData.put("refund_recv_accout",refundRecvAccout);//退到哪1）退回银行卡：2）退回支付用户零钱:
                    saveData.put("refund_id",refund_id);
                    //开始调用sql
                    try{
                        dbExecutor.insert("com.sutpc.dao.PayDao.updateRefundOrder",saveData);
                    }catch (Exception e){
                        rootLogger.error("doWxPay-----存储失败！");
                        rootLogger.error(e);
                    }
                }else if(resultCode.equals("FAIL")){
                    Element errCodeEl=root.element("err_code");//错误代码
                    String errCode=errCodeEl.getStringValue();
                    Element errCodeDesEl=root.element("err_code_des");//错误代码描述
                    String errCodeDes=errCodeDesEl.getStringValue();
                    results.put("success",false);
                    results.put("message",errCode);
                    results.put("msg", errCodeDes);
                    //失败 记录失败原因 开始储存数据库表
                    Map<String,String> saveData= new HashMap<String,String>();
                    saveData.put("err_code",errCode);
                    saveData.put("err_code_des",errCodeDes);
                    saveData.put("refund_id",refund_id);
                    //开始调用sql
                    try{
                        dbExecutor.update("com.sutpc.dao.PayDao.updateRefundOrder",saveData);
                    }catch (Exception e){
                        rootLogger.error("doWxPay-----存储失败！");
                        rootLogger.error(e);
                    }
                }
            }else if(returnCode.equals("FAIL")){
                //握手失败
                returnMsgEl=root.element("return_msg");
                returnMsg=returnMsgEl.getStringValue();
                results.put("success",false);
                results.put("msg","请求微信失败");
                results.put("message",returnMsg);
            }
        }catch (Exception e){
            results.put("success",false);
            results.put("msg","请求微信失败");
            results.put("message","连接微信请求失败");
        }
        return JSON;
    }

5、查询订单状态2

    // 查询订单状态接口
    public String queryOrder() throws Exception {
        if(this.param==null || this.param.isEmpty()){
            this.param=getParamFromRequest();
            if( this.param==null ){
                results.put("success", false);
                results.put("msg", "参数不足");
                results.put("message", "缺失参数param");
                rootLogger.error("queryOrder--------缺失参数param！");
                return JSON;
            }
        }
        Object param_deserialize;
        try {
            param_deserialize = JSONUtil.deserialize(param);
        }catch (Exception e){
            results.put("success", false);
            results.put("msg", "参数解析错误");
            results.put("message", e.getMessage());
            rootLogger.error("queryOrder--------参数解析错误！");
            rootLogger.error(e);
            return JSON;
        }
        Map<String, String> paramMap;
        try{
            paramMap = (Map<String, String>)param_deserialize;
        }catch(ClassCastException ex2){
            results.put("success", false);
            results.put("msg", "参数格式不正确");
            results.put("message", ex2.getMessage());
            rootLogger.error("queryOrder--------参数格式不正确！");
            rootLogger.error(ex2);
            return JSON;
        }
        //判断参数是否正确
        String out_trade_no=paramMap.get("orderNo");
        if( out_trade_no==null || out_trade_no.equals("")  ){
            results.put("success", false);
            results.put("msg", "订单号错误");
            results.put("message", "orderNo参数不存在或空");
            rootLogger.error("queryOrder--------订单号错误：orderNo参数不存在或空！");
            return JSON;
        }
        //将所有参数组装成map排序
        Map<String, Object> signMap = new TreeMap<String, Object>(
            new Comparator<String>() {
                public int compare(String obj1, String obj2) {
                    // 升序排序
                    return obj1.compareTo(obj2);
                }
            }
        );
        signMap.put("mch_id",mch_id);
        signMap.put("appid",appid);
        signMap.put("out_trade_no",out_trade_no);
        //生成随机字符串
        String nonce_str= MD5Utils.getNonceStr(32);
        signMap.put("nonce_str",nonce_str);
        signMap.put("sign_type","MD5");
        //获取签名结果
        String sign=getSign(signMap);
        //拼接XML
        String xml = "<xml>" +
                "<appid><![CDATA[" + appid + "]]></appid>" +
                "<mch_id><![CDATA[" + mch_id + "]]></mch_id>" +
                "<nonce_str><![CDATA[" + nonce_str + "]]></nonce_str>" +
                "<out_trade_no><![CDATA[" + out_trade_no + "]]></out_trade_no>" +
                "<sign><![CDATA[" + sign + "]]></sign>" +
                "<sign_type><![CDATA[MD5]]></sign_type>" +
                "</xml>";
        // TODO: 调用请求微信接口函数 并return结果
        HttpsClientUtil httpsClientUtil = new HttpsClientUtil();
        String wxResponseText=httpsClientUtil.doPostXml(wxQueryOrderUrl, xml);
        //开始解析xml字符串
        Document document = DocumentHelper.parseText(wxResponseText);
        Element root = document.getRootElement();
        Element successEl=root.element("return_code");//查询状态
        String success=successEl.getStringValue();
        //开始判断结果
        if(success.equals("SUCCESS")){//判断查询状态
            Element resultCodeEL=root.element("result_code"); //业务结果
            String resultCode=resultCodeEL.getStringValue();
            if( resultCode.equals("SUCCESS") ){//判断业务结果
                //存放结果数据
                Map<String,Object> item= new HashMap<String,Object>();
                Element outTradeNoEl=root.element("out_trade_no");//商户订单号 和 其实传入的订单号一样
                String outTradeNo=outTradeNoEl.getStringValue();
                //订单目前状态 : SUCCESS—支付成功 REFUND—转入退款 NOTPAY—未支付 CLOSED—已关闭 ACCEPT—已接收，等待扣款 PAY_FAIL--支付失败(其他原因，如银行返回失败)
                Element tradeStateEl=root.element("trade_state");
                String tradeState=tradeStateEl.getStringValue();
                if( tradeState.equals("SUCCESS") ){ //判断支付结果是什么
                    item.put("status", 1);
                }else{
                    item.put("status", -1);
                }
                item.put("orderId",outTradeNo);
                results.put("result",item);
                results.put("success",true);
            }else if( resultCode.equals("FAIL") ){
                Element errCodeEl=root.element("err_code");//错误代码
                String errCode=errCodeEl.getStringValue();
                Element errCodeDesEl=root.element("err_code_des");//错误代码描述
                String errCodeDes=errCodeDesEl.getStringValue();
                results.put("success",false);
                results.put("msg",errCode);
                results.put("message", errCodeDes);
                rootLogger.warn("queryOrder--------查询结果错误！");
                rootLogger.warn(errCodeDes);
            }
        }else if(success.equals("FAIL")){
            Element msgEl=root.element("return_msg");//错误原因
            String msg=msgEl.getStringValue();
            results.put("success",false);
            results.put("msg",msg);
            rootLogger.error("queryOrder--------查询失败！");
            rootLogger.error(msg);
        }
        return JSON;
    }

HttpsClientUtil 实现代码, 不过我们这个架构比较老。。

package com.sutpc.utils;

import org.apache.http.HttpEntity;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.omg.IOP.Encoding;
import org.springframework.web.context.request.WebRequest;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.net.URL;
import java.net.URLEncoder;
import java.security.Key;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
/*
 * 利用HttpClient进行post请求的工具类
 */
public class HttpsClientUtil {
    public String doPost(String url, Map<String,String> map) throws Exception{
        String result = null;
        HttpClient httpClient = new SSLClient();
        HttpPost httpPost = new HttpPost(url);
        //设置参数
        List<NameValuePair> list = new ArrayList<NameValuePair>();
        Iterator iterator = map.entrySet().iterator();
        while(iterator.hasNext()){
            Entry<String,String> elem = (Entry<String, String>) iterator.next();
            list.add(new BasicNameValuePair(elem.getKey(),elem.getValue()));
        }
        if(list.size() > 0){
            UrlEncodedFormEntity entity = new UrlEncodedFormEntity(list, "UTF-8");
            httpPost.setEntity(entity);
        }
        HttpResponse response = httpClient.execute(httpPost);
        if(response != null){
            HttpEntity resEntity = response.getEntity();
            if(resEntity != null){
                result = EntityUtils.toString(resEntity, "UTF-8");
            }
        }
        return result;
    }
    public String doGet(String url, Map<String,String> map) throws Exception{
        String result = null;
        HttpClient httpClient = new SSLClient();
        String param="";
        for(String nameKey:map.keySet()){
            param += nameKey+"="+map.get(nameKey)+"&";
        }
        param = param.substring(0,param.length()-1);
        String urlNameString = url + "?" + param;
        HttpGet httpGet = new HttpGet(urlNameString);
        HttpResponse response = httpClient.execute(httpGet);
        if(response != null){
            HttpEntity resEntity = response.getEntity();
            if(resEntity != null){
                result = EntityUtils.toString(resEntity, "UTF-8");
            }
        }
        return result;
    }
    public String doPostXml(String url, String xml) throws Exception{
        String result = null;
        HttpClient httpClient = new SSLClient();
        HttpPost httpPost = new HttpPost(url);
        httpPost.addHeader("Content-Type","text/xml;charset=UTF-8");
        StringEntity stringEntity = new StringEntity(xml, "UTF-8");
        stringEntity.setContentEncoding("UTF-8");

        httpPost.setEntity(stringEntity);
        HttpResponse response = httpClient.execute(httpPost);
        if(response != null){
            HttpEntity resEntity = response.getEntity();
            if(resEntity != null){
                result = EntityUtils.toString(resEntity, "UTF-8");
            }
        }
        return result;
    }
    public String httpPostXmlStr(String url, String xml) throws Exception{
        HttpClient httpClient = HttpClients.createDefault();
//        HttpClient httpClient = new SSLClient();
        HttpPost httpPost = new HttpPost(url);
        httpPost.setHeader("Content-Type", "text/xml; charset=UTF-8");
        //设置参数
        List<NameValuePair> nvps = new ArrayList<NameValuePair>();
        nvps.add(new BasicNameValuePair("data", xml));
        httpPost.setEntity(new UrlEncodedFormEntity(nvps,"UTF-8"));
        HttpResponse response = httpClient.execute(httpPost);
        String result = null;
        if(response != null){
            HttpEntity resEntity = response.getEntity();
            if(resEntity != null){
                result = EntityUtils.toString(resEntity, "UTF-8");
            }
        }
        return result;
    }
}

SSLClient 实现

package com.sutpc.utils;

import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

//用于进行Https请求的HttpClient
public class SSLClient extends DefaultHttpClient{
    public SSLClient() throws Exception{
        super();
        //传输协议需要根据自己的判断　
        SSLContext ctx = SSLContext.getInstance("TLSv1.2");
        X509TrustManager tm = new X509TrustManager() {
            @Override
            public void checkClientTrusted(X509Certificate[] chain,
                                           String authType) throws CertificateException {
            }
            @Override
            public void checkServerTrusted(X509Certificate[] chain,
                                           String authType) throws CertificateException {
            }
            @Override
            public X509Certificate[] getAcceptedIssuers() {
                return null;
            }
        };
        ctx.init(null, new TrustManager[]{tm}, null);
        SSLSocketFactory ssf = new SSLSocketFactory(ctx,SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
        ClientConnectionManager ccm = this.getConnectionManager();
        SchemeRegistry sr = ccm.getSchemeRegistry();
        sr.register(new Scheme("https", 443, ssf));
    }
}

最后编辑于：2020.01.07 16:41:41

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微信小程序开发-微信支付之免密支付（自动扣费）二 小程序+java接口

接着教程1写的 一些通用的接口函数，接收解析参数等我去掉了，你们自己加，给微信传输的参数看我上一个教程中链接有解释。

1、查询签约contract_id 函数，查看签约有没有效果，签约id是什么

2、查询订单状态

3、申请退款

4、查询退款结果

5、查询订单状态2

HttpsClientUtil 实现代码, 不过我们这个架构比较老。。

SSLClient 实现

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微信小程序开发-微信支付之免密支付（自动扣费）二小程序+java接口

接着教程1写的一些通用的接口函数，接收解析参数等我去掉了，你们自己加，给微信传输的参数看我上一个教程中链接有解释。