Http soap请求不返回任何内容

Question

我正在尝试通过http帖子发送肥皂请求。根据显示https://t4t.services.telenet.be/TelemeterService?wsdl

的https://t4t.services.telenet.be/TelemeterService?xsd=1

我需要发布一个ID和密码。

这是我的要求：

public static void main(String[] args) {
    try {
        callWebService("retrieveUsage");
    } catch (IOException e) {
        e.printStackTrace();
    }
}

public static void callWebService(String soapaction) throws IOException {
    String body = "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?><SOAP-ENV:Envelope xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:soap=\"http://schemas.xmlsoap.org/wsdl/soap/\" xmlns:tns=\"http://www.telenet.be/TelemeterService/\" xmlns:wsdl=\"http://schemas.xmlsoap.org/wsdl/\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" ><SOAP-ENV:Body><mns1:RetrieveUsageRequest xmlns:mns1=\"http://www.telenet.be/TelemeterService/\"><UserId>test</UserId><Password>test</Password></mns1:RetrieveUsageRequest></SOAP-ENV:Body></SOAP-ENV:Envelope>";
    HttpPost httppost = new HttpPost("https://t4t.services.telenet.be/TelemeterService");

    // Request parameters and other properties.
    StringEntity stringentity = new StringEntity(body, "UTF-8");
    stringentity.setChunked(true);
    httppost.setEntity(stringentity);
    httppost.addHeader("Accept", "text/xml");
    httppost.addHeader("SOAPAction", soapaction);
    //Execute and get the response.
    HttpClient httpclient = new DefaultHttpClient();
    HttpResponse response = httpclient.execute(httppost);
    HttpEntity entity = response.getEntity();

    String strresponse = null;
    if (entity != null) {
        strresponse = EntityUtils.toString(entity);
    }
    System.out.println(strresponse);
    System.out.println("Done");
}

我正在使用apache http。

strresponse是空的。

我的代码有问题吗？