Servlet calling a BAPI Web Service...

Question

Hi everyone,
I downloaded the wsdl file for the BAPI_USER_GETLIST.
I created a Deployable Proxy that points to this wsdl file.
I created a Web modul project with a servlet.
I also created an Enterprise application project that contains my Web modul project.
In the Web modul project, I created  a servlet :
Here is the code of the servlet :
<b>try {               
     InitialContext ic = new InitialContext();                    
     BAPI_USER_GETLISTService sampleWS = (BAPI_USER_GETLISTService)ic.lookup("java:comp/env/SampleWSProxy");
     BAPI_USER_GETLISTPortType vi = sampleWS.getLogicalPort();
     BAPI_USER_GETLIST importParams  = new BAPI_USER_GETLIST();
     ArrayList list = new ArrayList();
     BAPIUSNAME structure = new BAPIUSNAME();
     structure.setUSERNAME(new String());
     structure.setFIRSTNAME(new String());
     structure.setLASTNAME(new String());
     structure.setFULLNAME(new String());
     list.add(structure);
     BAPIUSNAME[] rows = new BAPIUSNAME[list.size()];
     list.toArray(rows);
     importParams.setUSERLIST(rows);
     importParams.setWITH_USERNAME("X");
     BAPI_USER_GETLISTResponse exportParams = null;
          BAPIUSNAME[] res = vi.BAPI_USER_GETLIST(rows,"");
          for(int i=0;i<res.length;i++)
               response.getWriter().write(res<i>.getFIRSTNAME());
} catch(Exception e)
          response.getWriter().write("ERROR!!!" + e.getMessage());
</b>
The exception is :
<b>ERROR!!!Service call exception; nested exception is: com.sap.engine.services.webservices.jaxrpc.exceptions.InvalidResponseCodeException: Invalid Response Code: (401) Unauthorized.</b>
Can someone help with this security problem ?
Is the code OK except the security problem ?
Thanks a lot.

Answer 1

Hi David,
Before calling a BAPI, we have to make a connection to
R/3. Try following code...
import com.sap.mw.jco.*;
public class TutorialConnect1 extends Object {
   JCO.Client mConnection;
   public Connect1() {
     try {
       // Change the logon information to your own system/user
       mConnection =
          JCO.createClient("001", // SAP client
            "<userid>", // userid
            "****", // password
            null, // language
            "<hostname>", // application server host name
            "00"); // system number
       mConnection.connect();
       System.out.println(mConnection.getAttributes());
       mConnection.disconnect();
    catch (Exception ex) {
      ex.printStackTrace();
      System.exit(1);
  public static void main (String args[]) {
    Connect1 app = new Connect1();
This code from sap help, for details visit this link..
http://help.sap.com/saphelp_erp2004/helpdata/en/bc/42e13d82fcfb34e10000000a114084/frameset.htm
Hope this helps.
Regards,
Narinder Hartala