如何修复使用Java调用SOAP Web服务时不可读的XML响应？

问：

调用 SOAP Web 服务

我有一个 soap web 服务要调用，这是我的代码：

private List<Guaranty> getGuarantyList(String nationalId, String centerBankCode) throws IOException{
        
        try {
            fixHttpsHandler();
        } catch (Exception ex) {
            System.out.println(ex.getMessage());
        }

        // Code to make a webservice HTTP request
        String responseString = "";
        String outputString = "";
        String wsEndPoint = "http://192.168.5.202/services/out.asmx";
        URL url = new URL(wsEndPoint);
        URLConnection connection = url.openConnection();
        HttpURLConnection httpConn = (HttpURLConnection) connection;
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        String xmlInput = "<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:pos=\"http://postbank.ir/\">\r\n" + 
                "   <soapenv:Header>\r\n" + 
                "      <pos:PostbankAuth>\r\n" + 
                "         <!--Optional:-->\r\n" + 
                "         <pos:UserName>ebank</pos:UserName>\r\n" + 
                "         <!--Optional:-->\r\n" + 
                "         <pos:Password>qwer@123</pos:Password>\r\n" + 
                "      </pos:PostbankAuth>\r\n" + 
                "   </soapenv:Header>\r\n" + 
                "   <soapenv:Body>\r\n" + 
                "      <pos:getGuaranty>\r\n" + 
                "         <!--Optional:-->\r\n" + 
                "         <pos:nationalCode>" + nationalId + "</pos:nationalCode>\r\n" + 
                "         <!--Optional:-->\r\n" + 
                "         <pos:centerBankCode>" + centerBankCode + "</pos:centerBankCode>\r\n" + 
                "         <!--Optional:-->\r\n" + 
                "         <pos:length>10</pos:length>\r\n" + 
                "         <pos:offset>0</pos:offset>\r\n" + 
                "      </pos:getGuaranty>\r\n" + 
                "   </soapenv:Body>\r\n" + 
                "</soapenv:Envelope>";
        byte[] buffer = new byte[xmlInput.length()];
        buffer = xmlInput.getBytes();
        bout.write(buffer);
        byte[] b = bout.toByteArray();
        String SOAPAction = "http://postbank.ir/getGuaranty";
        httpConn.setRequestProperty("Accept-Encoding", "gzip,deflate");
        httpConn.setRequestProperty("Content-Type", "text/xml; charset=utf-8");
        httpConn.setRequestProperty("SOAPAction", SOAPAction);
        httpConn.setRequestProperty("Content-Length", String.valueOf(b.length));
        httpConn.setRequestProperty("Host", "192.168.5.202");
        httpConn.setRequestProperty("Connection", "Keep-Alive");
        httpConn.setRequestProperty("User-Agent", "Apache-HttpClient/4.5.5 (Java/16.0.1)");
        httpConn.setRequestMethod("POST");
        httpConn.setDoOutput(true);
        httpConn.setDoInput(true);
        OutputStream out = httpConn.getOutputStream();
        // Write the content of the request to the outputstream of the HTTP
        // Connection.
        out.write(b);
        out.close();
        // Ready with sending the request.
        // Read the response.

        InputStreamReader isr = new InputStreamReader(httpConn.getInputStream(), Charset.forName("UTF-8"));

        BufferedReader in = new BufferedReader(isr);
        // Write the SOAP message response to a String.
        while ((responseString = in.readLine()) != null) {
            outputString = outputString + responseString;
        }
            
        String formattedSOAPResponse = formatXML(outputString);
        return formattedSOAPResponse ;
        
    }

但我得到这个作为响应，而不是一个可读的 XML：

________ _$ؐ@ _iG#） * eVe]f@ 흼 { { ;N' ？\fd_l J ɞ！ ？~|？」 _ _ez MQ-？ hw Q / լX^| Ѻ= > 8z T 2/ U + > yۮ_ڽ L “k >W ] r7ח ~ k _7 ٽ { 5_ . M - {kv [） O ヰ | ٲ ~ 7 j （ _Ъj I |;.n ºl __ 7Mv _Uo_ 5 ？~ N |v ] Y __ $πG E ^ ۏ > 1 I~Q， e GG{;{{�;ٻ hg νG -ۚ^ j潹 Km _ ыl 5 _ f _ = 6 _5 k C wv？˻ wp n Rެ __ nz 6 |V ۬]7 g NO _ \ 51 ku _5 ҏѠi E^c（ ѿ 7 _X o _O _ ？& _ _ _ o ？ o _F_ [_ W [տ 7_ _ _ dzu $ C_ q aB 2} { ӶG _ TD ;？y0 9， B$o oW ， g Ͻ o 5 c ~ 3 q ٫ ;{4=43 v _ ？x s_ ： _B _ 7 ;4�;; _t^Ֆ { h פ o 1D #R“ _ o 4” _A _t ;+ ？}@ _ uM__o 2_ͫe r v_ } C ^c_BL ^z S~ 9z ^ y3 __ 5 ） + ？ 8 _ o K ？ _ m鏿 ˜n_ Q _ o 5 _w N？G .q“i _ '} iW ˘ _ꙴZH_I�%&/m�{_J�J��t�_�

这种方式适用于其他 Web 服务，但不适用于此服务。我在 SOAP-UI 中测试了 Web 服务，它工作正常...... 谢谢