public class HttpClientAndPostCheck {
   private StringBuilder stringBuilder;

   public HttpClientAndPostCheck() {

    }

   public static Document VerPIN(String xml) throws Exception
{
    DocumentBuilderFactory doc = DocumentBuilderFactory.newInstance();
    DocumentBuilder blr = doc.newDocumentBuilder();
    InputSource inser = new InputSource(new StringReader(xml));
    return null;
}

  public String runXML() {
    String resultat = "";
    stringBuilder = new StringBuilder();
    stringBuilder.append(String.format("<?xml version="1.0"
    encoding="UTF-8" ?>" +
    "<soapenv:Envelope
  xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
   xmlns:_0="http://test.org/ADInterface/1_0">" +
    "<soapenv:Header/>"                                                    +
     "<soapenv:Body>"                                                      +
      "<_0:queryData>"                                                     +
      "     <_0:ModelCRUDRequest>"                                         +
      "         <_0:ModelCRUD> "                                           +
      "          <_0:serviceType>checkForPIN</_0:serviceType> "            +
      "           <_0:DataRow> "                                          +
      "              <_0:field column="UserPIN"> "                      +
      "               <_0:val>0000</_0:val> "                             +
      "               </_0:field> "                                    +
      "         <_0:field column="Phone"> "                             +
      "           <_0:val>0015145542122</_0:val>  "                       +
      "                 </_0:field> "                                      +
      "                 </_0:DataRow> "                                    +
      "                     </_0:ModelCRUD>"                               +
      "                         <_0:ADLoginRequest> "                      +
      "                   <_0:user>WebService</_0:user> "              +
      "                  <_0:pass>WSTest3</_0:pass> "                  +
      "               <_0:lang>en_US</_0:lang> "                       +
      "            <_0:ClientID>1000000</_0:ClientID> "                +
      "            <_0:RoleID>1000035</_0:RoleID> "                    +
      "           <_0:OrgID>1000000</_0:OrgID> "                       +
      "            <_0:WarehouseID>1000000</_0:WarehouseID> "          +
      "           <_0:stage>0</_0:stage> "                             +
      "         </_0:ADLoginRequest> "                                 +
      "      </_0:ModelCRUDRequest> "                                  +
      "      </_0:queryData> "                                         +
      " </soapenv:Body> "                                                  +
    "</soapenv:Envelope>"));

        return resultat;
        }
    String xml= stringBuilder.toString();
    HttpPost httppost = new
    HttpPost("http://dev.testgob.com/ADInterface/services");
    HttpPost post = new
    HttpPost("http://de.testgob.com/ADInterface/services");

    AuthScope as = new AuthScope("de.testgob.com" , 452);
    CredentialsProvider provider=new BasicCredentialsProvider();
    UsernamePasswordCredentials txt = new
   UsernamePasswordCredentials("username", "password");
   **//the errors begin**
    provider.setCredentials(AuthScope.ANY, txt);

       HttpClient client = HttpClientBuilder.create()
       .setDefaultCredentialsProvider(provider)
      .Build();

    StringEntity entity;

    try {
            entity = new StringEntity(xml, StandardCharsets.UTF_8);
            httppost.setHeader("Content-Type","text/xml;Charset-UTF_8");
            httppost.setEntity(entity);

            HttpResponse response = client.execute(httppost);
            result = EntityUtils.toString(response.getEntity());
            return result;
        }
    catch(Exception e) {

        e.printStackTrace();
    }