问在使用云解析的添加域名时，请求返回为4100，请问怎么配置请求签名？

String strUrl = "POSTcns.api.qcloud.com/v2/index.php?Action=DomainCreate&Nonce=9572234&Region=gz&SecretId=AKIDQQaiqoMirwPj07NMzCjLw5MavV4TDs18&SignatureMethod=HmacSHA1&Timestamp=1540956598";

try {
            //进行HmacSHA1编码
            SecretKeySpec signKey = new SecretKeySpec(strSecretKey.getBytes("utf-8"),"HmacSHA1");
            Mac mac = Mac.getInstance("HmacSHA1");
            mac.init(signKey);
            byte[] rawHmac = mac.doFinal(strUrl.getBytes("utf-8"));
            System.out.println(Hex.encodeHexString(rawHmac));
            //64位编码后的Signature
            String text = Base64.getEncoder().encodeToString(rawHmac);
            System.out.println(text);
            //url编码后的Signature
            String urlText = java.net.URLEncoder.encode(text,"utf-8");
            System.out.println(urlText);
            //请求的url
            String requestUrl = "https://cns.api.qcloud.com/v2/index.php";
            HttpClient client = new HttpClient();
            PostMethod post = new PostMethod(requestUrl);
            //在头文件中设置转码
            post.addRequestHeader("Content-Type", format);
            //请求参数
            NameValuePair[] data = {
                    new NameValuePair("Action","DomainCreate"),
                    new NameValuePair("SecretId","AKIDQQaiqoMirwPj07NMzCjLw5MavV4TDs18"),
                    new NameValuePair("Region","ap-guangzhou"),
                    new NameValuePair("Timestamp","1540956598"),
                    new NameValuePair("Nonce","9572234"),
                    new NameValuePair("Signature",urlText),
                    new NameValuePair("SignaMethod","HmacSHA1"),
                    new NameValuePair("domain","dev.test.com"),
                    new NameValuePair("projectId","0"),
            };
            post.setRequestBody(data);
            client.executeMethod(post);
            //打印返回头
            Header[] headers = post.getResponseHeaders();
            for (Header h : headers) {
                System.out.println(h.toString());
            }
            //获取返回体
            String result = new String(post.getResponseBodyAsString().getBytes("utf-8"));
            System.out.println("result:" + result);
            post.releaseConnection();

        } catch (Exception e) {
            e.printStackTrace();
        }