对接接口（笔记片段）

一、工具方法
1、远程调用接口

  public static String httpsRequest2(String requestUrl, String requestMethod, String parameter,
        Map obj) throws IOException {
        log.info("远程调用开始 requestUrl：" + requestUrl + ",requestMethod:" + requestMethod + ",parameter:" + parameter);
        URL connect = null;
        OutputStreamWriter paramout = null;
        InputStreamReader inputStreamReader = null;
        BufferedReader reader = null;
        HttpURLConnection connection = null;
        StringBuffer data = new StringBuffer();
        try {
            connect = new URL(requestUrl);
            // 1、打开和url之间的连接
            connection = (HttpURLConnection)connect.openConnection();
            // 2、设置通用的请求属性
            connection.setRequestMethod(requestMethod);// 请求方法post、get
            connection.setDoOutput(true);
            connection.setReadTimeout(30000);
            connection.setConnectTimeout(30000);// 连接超时时间为30秒
            connection.setRequestProperty("Content-Type", "application/json;charset=utf-8");
            connection.setRequestProperty("Charset", "UTF-8");
            connection.setRequestProperty("accept", "*
    public static String getHttpParams(HttpServletRequest request) throws IOException {
        StringBuffer sb = new StringBuffer();
        BufferedReader reader = null;
        InputStreamReader inputStreamReader = null;
        try {
            inputStreamReader = new InputStreamReader(request.getInputStream(), "UTF-8");
            reader = new BufferedReader(inputStreamReader);
            String line;
            while ((line = reader.readLine()) != null) {
                sb.append(line);
            }
        } catch (Exception e) {
            log.info("从业务请求中获取参数失败!!!");
            return null;
        } finally {
            if (reader != null) {
                reader.close();
            }
            if (inputStreamReader != null) {
                inputStreamReader.close();
            }
        }
        return sb.toString();
    }

3、获取请求真实ip（请求服务器Nginx需要配置）

 location / {
             proxy_pass   http://127.0.0.1:100;
			 proxy_redirect off;          
            proxy_set_header  Host $host;
            proxy_set_header   X-real-ip $remote_addr;
            proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
        }

 
    public static String httpsRequestIp(HttpServletRequest request) {
        log.info("----------------------获取真实ip开始----------------------------------------");
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
            if ("127.0.0.1".equals(ip) || "0:0:0:0:0:0:0:1".equals(ip)) {
                // 根据网卡取本机配置的IP
                InetAddress inet = null;
                try {
                    inet = InetAddress.getLocalHost();
                    log.info(InetAddress.getLoopbackAddress() + "");
                } catch (Exception e) {
                    e.printStackTrace();
                }
                ip = inet.getHostAddress();
            }
        }
        log.info("ips:" + ip);
        // 多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
        if (ip != null && ip.length() > 15) {
            if (ip.indexOf(",") > 0) {
                ip = ip.substring(0, ip.indexOf(","));
            }
        }
        log.info("----------------------获取真实ip结束-----------------------" + ip);
        return ip.trim();
    }

4、请求接口参数模拟

			    Map omap = new HashMap();
                omap.put("partnerOrderNo", "123");// 分销商订单编号
                omap.put("productId", "1");// 三方产品id
                omap.put("goodsId", "2");// 三方商品id
                omap.put("quantity", 1);// 订购份数
                
                long timestamp = new Date().getTime();// 请求时间戳
                String dataString = HttpRequestUtils.jsonToMap(com.alibaba.fastjson.JSONObject.toJSONString(omap));
               
                String sgin = MD5.string2MD5(SystemConfig.APP_SECRET + timestamp + dataString);// 请求签名（请求参数排序签名）
                Map map1 = new HashMap();
                map1.put("appKey", SystemConfig.APP_KEY);
                map1.put("timestamp", timestamp);
                map1.put("sgin", sgin);
                map1.put("data", omap);
                map1.put("otas", "1");
                map1.put("sName", "createOrder_execute");
                String reslut = null;
                try {
                    reslut = CommonUtils.httpsRequest(APIURL, "POST", JSONObject.fromObject(map1).toString());
                } catch (Exception e) {
                    rst.setResult("1");
                    rst.setError("创建订单接口错误");
                    return rst;
                }
              
                JSonObject fromObject = JSONObject.fromObject(reslut);
                if ("200".equals(fromObject.getString("result")) && "0".equals(fromObject.getString("code"))) {
                    datas = fromObject.getJSONObject("message").getJSONObject("data");
                } else {               
                    rst.addMessage("ustate", "1");
                    rst.setError(fromObject.getString("error"));
                    return rst;
                }

5、json字符串转顺序Map

 
    public static String jsonToMap(String jsonStr) {
        Map treeMap = new TreeMap();
        com.alibaba.fastjson.JSonObject json =
            com.alibaba.fastjson.JSONObject.parseObject(jsonStr, Feature.OrderedField);// Feature.OrderedField实现解析后保存不乱序
        Iterator keys = json.keySet().iterator();
        while (keys.hasNext()) {
            String key = keys.next();
            Object value = json.get(key);
            // 判断传入kay-value中是否含有""或null
            if (json.get(key) == null || value == null || value.toString().length() == 0) {
                // 当JSON字符串存在null时,不将该kay-value放入Map中,即显示的结果不包括该kay-value
                continue;
            }
            // 判断是否为JSonArray(json数组)
            if (value instanceof JSONArray) {
                JSonArray jsonArray = (JSONArray)value;
                List