Java Code To invoke SOAP Webservice With https endpoint

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This page descirbe how to invoke SOAP service from JAVA client. It provides sample Java client code to invoke SOAP service with https endpoint. It uses POSt method. It shows basic java code to connect server and get the response.. It can be copied and used any other java java project. .

Webservice consumer need to invoke the SOAP service/api very frequently. Normally webservice provider provides the end point URL and soap action and a WSDL file. URL uses HTTPS protocol. Consumer need to write code to access/invoke the webservice service. We invoke webservice with POST methods.
Sample code given below can be used to invoke SOAP webservice .
There are many way to invoke the SOAP web service. But this is the best and easy way to invoke complex soap webservice.

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Java Code To Invoke SOAP Web Service :

 
package easycodeforall.soapclient;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.soap.MessageFactory;
import javax.xml.soap.MimeHeaders;
import javax.xml.soap.SOAPBody;
import javax.xml.soap.SOAPConnection;
import javax.xml.soap.SOAPConnectionFactory;
import javax.xml.soap.SOAPEnvelope;
import javax.xml.soap.SOAPMessage;
import javax.xml.soap.SOAPPart;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.xml.sax.InputSource;

import sg.ardpfnd.util.XMLUtil;

public class SoapClient {
	// SOAP Request
	/**
	 *
	 * <pre>
	 * {@code
	 * <soapenv:Envelope
			xmlns:ns="https://www.easycodeforall.com/xml-utility-online"
			xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
	 *    <soapenv:Header />
	 *    <soapenv:Body>
	 *      <ns:request>
	 *       <ns:student>
	 *        <ns:id>123</ns:id>
	 *        <ns:name type="ENGG">SAGAR DUTTA</ns:name>
	 *       </ns:student>
	 *      </ns:request>
	 *    </soapenv:Body>
	 * </soapenv:Envelope>
	 * 
	</pre>
	
	 * }
	 */

	// SOAP Response
	/**
	 *
	 * <pre>
	 * {@code
	 * <SOAP-ENV:Envelope
			SOAP-ENV:encodingStyle="http://www.w3.org/2001/12/soap-encoding"
			xmlns:SOAP-ENV="http://www.w3.org/2001/12/soap-envelope">
	 *    <SOAP-ENV:Body
				xmlns:m="https://www.easycodeforall.com/xml-utility-online">
	 *       <m:GetStudentResponse>
	 *          <m:Student>Student registration is done. </m:Student>
	 *       </m:GetStudentResponse>
	 *    </SOAP-ENV:Body>
	 * </SOAP-ENV:Envelope>
	 * 
	</pre>
	
	 * }
	 */

	public static void main(String[] args) throws Exception {

		String soapEndpointUrl = "httpsColon//www.easycodeforall.com/virtualsrv/soap/xml_xml/m1642276960983?SRV=SoapTestService";
		String soapAction = "httpsColon//www.easycodeforall.com/virtualsrv/soap/xml_xml/m1642276960983";

		// Create request object
		MessageFactory messageFactory = MessageFactory.newInstance();
		SOAPMessage soapMessage = messageFactory.createMessage();

		// createSoapEnvelope(soapMessage);
		SOAPPart soapPart = soapMessage.getSOAPPart();

		String myNamespace = "ns";
		String myNamespaceURI = "https://www.easycodeforall.com/xml-utility-online";

		// SOAP Envelope
		SOAPEnvelope envelope = soapPart.getEnvelope();
		envelope.addNamespaceDeclaration(myNamespace, myNamespaceURI);

		// SOAP Body
		SOAPBody soapBody = envelope.getBody();

		// Request part as String
		String str = "";
        str = str + "<ns:request xmlns:ns=\"https://www.easycodeforall.com/xml-utility-online\">\n";
 
		str = str + "      <ns:student>\n";
 
		str = str + "       <ns:id>123</ns:id>\n";
 
		str = str + "       <ns:name type=\"ENGG\">SAGAR DUTTA</ns:name>\n";
 
		str = str + "      </ns:student>\n";
 
		str = str + "     </ns:request>\n"; 

		// Add request element to soap message
		DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
		documentBuilderFactory.setNamespaceAware(true);
		DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
		Document requestPart = documentBuilder.parse(
				new InputSource(new BufferedReader(new InputStreamReader(new ByteArrayInputStream(str.getBytes())))));

		Element toBeImported = requestPart.getDocumentElement();
		soapBody.appendChild(soapBody.getOwnerDocument().importNode(toBeImported, true));

		soapMessage.writeTo(System.out);

		// SOAP message headers
		MimeHeaders headers = soapMessage.getMimeHeaders();
		headers.addHeader("SOAPAction", soapAction);
		soapMessage.saveChanges();

		// Log/print the request soap message to console
		System.out.println("Request SOAP Message:");
		soapMessage.writeTo(System.out);
		System.out.println("\n");

		// Create SOAP Connection
		SOAPConnectionFactory soapConnectionFactory = SOAPConnectionFactory.newInstance();
		SOAPConnection soapConnection = soapConnectionFactory.createConnection();

		// Send SOAP Message to Server
		SOAPMessage soapResponse = soapConnection.call(soapMessage, soapEndpointUrl);

		// Print the webservice Response
		System.out.println("Response From Webservice:");
		soapResponse.writeTo(System.out);
		System.out.println();

		// Get SoapPart of the response as String.
		Element elm = soapResponse.getSOAPPart().getDocumentElement();
		String respAsString = toStringDocument(elm.getOwnerDocument());
		System.out.println("respAsString=" + respAsString);

		soapConnection.close();

	}

	private static String toStringDocument(Document doc) throws TransformerException {
		StringWriter sw = new StringWriter();
		TransformerFactory tf = TransformerFactory.newInstance();
		Transformer transformer = tf.newTransformer();
		transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
		transformer.setOutputProperty(OutputKeys.METHOD, "xml");
		transformer.setOutputProperty(OutputKeys.INDENT, "yes");
		transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
		transformer.transform(new DOMSource(doc), new StreamResult(sw));
		return sw.toString();
	}
}

Note:
	Please use the soap endpoint url. Then use soap action. send request to server and get the response.

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