SOAP request to WebService with java

Question

I m a bit confused about how to make a request to a webservice via java   For now the only thing that I ve understand is that webservices uses xml structured messages  but still I didn t quite understood how to structure my request    lt soap Envelope xmlns soap  http   schemas xmlsoap org soap envelope   gt     lt soap Body gt       lt getProductDetails xmlns  http   magazzino example com ws  gt         lt productId gt 827635 lt  productId gt       lt  getProductDetails gt     lt  soap Body gt   lt  soap Envelope gt    Basically I ve to send 2 parameters to the web service and in return I expect two other parameters   I guess there are some jars that can do most of the job  but I didn t find any online  Can someone please explain me the basis

User · Answer

When the WSDL is available  it is just two steps you need to follow to invoke that web service   Step 1  Generate the client side source from a WSDL2Java tool   Step 2  Invoke the operation using   YourService service   new YourServiceLocator    Stub stub   service getYourStub    stub operation      If you look further  you will notice that the Stub class is used to invoke the service deployed at the remote location as a web service  When invoking that  your client actually generates the SOAP request and communicates  Similarly the web service sends the response as a SOAP  With the help of a tool like Wireshark  you can view the SOAP messages exchanged   However since you have requested more explanation on the basics  I recommend you to refer here and write a web service with it s client to learn it further

User · Answer

A SOAP request is an XML file consisting of the parameters you are sending to the server   The SOAP response is equally an XML file  but now with everything the service wants to give you   Basically the WSDL is a XML file that explains the structure of those two XML     To implement simple SOAP clients in Java  you can use the SAAJ framework  it is shipped with JSE 1 6 and above       SOAP with Attachments API for Java  SAAJ  is mainly used for dealing directly with SOAP Request Response messages which happens behind the scenes in any Web Service API  It allows the developers to directly send and receive soap messages instead of using JAX-WS    See below a working example  run it   of a SOAP web service call using SAAJ  It calls this web service   import javax xml soap     public class SOAPClientSAAJ           SAAJ - SOAP Client Testing     public static void main String args                             The example below requests from the Web Service at               http   www webservicex net uszip asmx op GetInfoByCity               To call other WS  change the parameters below  which are               - the SOAP Endpoint URL  that is  where the service is responding from               - the SOAP Action              Also change the contents of the method createSoapEnvelope   in this class  It constructs              the inner part of the SOAP envelope that is actually sent                      String soapEndpointUrl    http   www webservicex net uszip asmx           String soapAction    http   www webserviceX NET GetInfoByCity            callSoapWebService soapEndpointUrl  soapAction              private static void createSoapEnvelope SOAPMessage soapMessage  throws SOAPException           SOAPPart soapPart   soapMessage getSOAPPart             String myNamespace    myNamespace           String myNamespaceURI    http   www webserviceX NET               SOAP Envelope         SOAPEnvelope envelope   soapPart getEnvelope            envelope addNamespaceDeclaration myNamespace  myNamespaceURI                               Constructed SOAP Request Message               lt SOAP-ENV Envelope xmlns SOAP-ENV  http   schemas xmlsoap org soap envelope   xmlns myNamespace  http   www webserviceX NET  gt                   lt SOAP-ENV Header  gt                   lt SOAP-ENV Body gt                       lt myNamespace GetInfoByCity gt                           lt myNamespace USCity gt New York lt  myNamespace USCity gt                       lt  myNamespace GetInfoByCity gt                   lt  SOAP-ENV Body gt               lt  SOAP-ENV Envelope gt                             SOAP Body         SOAPBody soapBody   envelope getBody            SOAPElement soapBodyElem   soapBody addChildElement  GetInfoByCity   myNamespace           SOAPElement soapBodyElem1   soapBodyElem addChildElement  USCity   myNamespace           soapBodyElem1 addTextNode  New York               private static void callSoapWebService String soapEndpointUrl  String soapAction            try                  Create SOAP Connection             SOAPConnectionFactory soapConnectionFactory   SOAPConnectionFactory newInstance                SOAPConnection soapConnection   soapConnectionFactory createConnection                    Send SOAP Message to SOAP Server             SOAPMessage soapResponse   soapConnection call createSOAPRequest soapAction   soapEndpointUrl                   Print the SOAP Response             System out println  Response SOAP Message                 soapResponse writeTo System out               System out println                 soapConnection close              catch  Exception e                System err println   nError occurred while sending SOAP Request to Server  nMake sure you have the correct endpoint URL and SOAPAction  n                e printStackTrace                         private static SOAPMessage createSOAPRequest String soapAction  throws Exception           MessageFactory messageFactory   MessageFactory newInstance            SOAPMessage soapMessage   messageFactory createMessage             createSoapEnvelope soapMessage            MimeHeaders headers   soapMessage getMimeHeaders            headers addHeader  SOAPAction   soapAction            soapMessage saveChanges                Print the request message  just for debugging purposes            System out println  Request SOAP Message             soapMessage writeTo System out           System out println   n             return soapMessage

User · Answer

I have come across other similar question here  Both of above answers are perfect  but here trying to add additional information for someone looking for SOAP1 1  and not SOAP1 2  Just change one line code provided by  acdcjunior  use SOAPMessageFactory1 1Impl implementation  it will change namespace to xmlns soap  quot http   schemas xmlsoap org soap envelope  quot   which is SOAP1 1 implementation  Change callSoapWebService method first line to following  SOAPMessage soapMessage   SOAPMessageFactory1 1Impl newInstance   createMessage    I hope it will be helpful to others

[java] SOAP request to WebService with java

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