About bapi with java

Question

hi expert's ,
         i wanted to know how we can do bapi with java ...?
         how we can retrive data from java.
          means what will be the coding for java?
               may be m not able to explain but plz help me with this...
Regards
Pankaj.

Answer 1

Hi
lets see if this helps.
Calling BAPIs from Java
This is an example program for calling a BAPI from the IBM development platform, Access Builder for SAP R/3.
Detailed program examples are shipped with the Access Builder for R/3.
Access Builder for SAP R/3
//Importing the required classes:
import com.sap.rfc.*;
import com.sap.rfc.exception.*;
import com.ibm.sap.bapi.*;
import com.ibm.sap.bapi.generated.*;
//Connecting to the R/3 System:
static private IRfcConnection establishConnection(MiddlewareInfo aMiddlewareInfo)
     throws JRfcRemoteException
     IRfcConnection aConnection = null ;
     ConnectInfo aConnectInfo = null ;
     UserInfo aUserInfo = null ;
     String orbServerName = aMiddlewareInfo.getOrbServerName() ;     
     // Please adjust the values written in UPPERCASE LETTERS
     // in the lines below so that they fit to your needs!
     // If you don't know the correct values ask your system
     // administrator!
     // After correcting these values you should change the
     // <bAdjusted> variable in the following line
     // from "false" to "true".
     // Then you can re-compile ("javac SampleCompanyCode.java") and
     // re-run ("java SampleCompanyCode -conn JNI") this sample...
     boolean bAdjusted = true;
     if (!bAdjusted) {
          throw (new JRfcRfcConnectionException (
               "Please adjust the Connection-Parameters to your
                 needs! (See method \"establishConnection\")"));
    //Connection information:
     aConnectInfo = new ConnectInfo (
          3,          // int aRfcMode 3=R/3 or 2=R/2
          null,          // String aDestination
          "9.7.12.7",     // String aHostName YOUR  HOSTNAME (e.g. IP-
                     //address)
          0,          // int aSystemNo YOUR SYSTEM-NUMBER
          null,                    // String aGatewayHost
          null,                    // String aGatewayService
          null,                    // String aSystemName
          null,                    // String aGroupName
          null,                    // String aMsgServer
          false,               // Boolean isLoadBalancing
          true);               // Boolean isCheckAuthorization
    //User information:
     aUserInfo = new UserInfo (
          "MUSTER",          // String aUserName,      YOUR USERID
          "IDES",          // String aPassword,      YOUR PASSWORD
          "800",          // String aClient, YOUR CLIENT NUMBER
          "e",                // String aLanguage, YOUR PREFERRED
                            //LANGUAGE
          1103);          // int aCodePage YOUR REQUIRED CODEPAGE     
    //Technical conversion for the selected middleware;
    // Open connection:
     IRfcConnectionFactory aConnectionFactory = FactoryManager.getSingleInstance().getRfcConnectionFactory() ;
     aConnection = aConnectionFactory.createRfcConnection(aConnectInfo, aUserInfo) ;
     aConnection.open() ;
   //Returning the connection:
     return aConnection ;
//Calling the main method:
public static void main (java.lang.String[] args)
  //Setting up the connection using the selected middleware:
     MiddlewareInfo aMiddlewareInfo = new MiddlewareInfo(args) ;
     FactoryManager aFactoryManager = FactoryManager.getSingleInstance() ;
     aFactoryManager.setMiddlewareInfo(aMiddlewareInfo) ;
    //Initializing the connection object:      
     IRfcConnection aConnection = null ;
     try
          aConnection = establishConnection(aMiddlewareInfo) ;
     catch (Exception ex)     
          System.out.println("ERROR : Could not create connection : " + ex) ;
          System.exit(-1) ;
     System.out.println("Connection established.");
   // --- TEST CODE (start) -
     try
          printList(aConnection) ;
//Calling the BAPI:
  //Declare an empty Object ID for the Business Object
  //CompanyCode:          
          objectId = CompanyCode.getEmptyObjectId() ;
     //Entering a value in the object ID:     
          objectId.getKeyField("COMPANYCODEID").setString("1000") ;
     //Instantiate the object CompanyCode with the object ID:
          companyCode = new CompanyCode(objectId) ;     // Create 2nd
         CompanyCode
          System.out.println ("Successfully created new CompanyCode : '" + companyCode + "'") ;
          printDetails(companyCode, aConnection) ;
     // --- TEST CODE (end) -
     catch (Exception ex)
          System.out.println ("Unexpected exception occurred:");
          System.out.println (ex);
private static void printDetails(CompanyCode companyCode, IRfcConnection connection)
     try     
    //Declare the parameters of the BAPI CompanyCode.GetDetail:
          CompanyCodeGetdetailParams aCompanyCodeGetdetailParams =
               new CompanyCodeGetdetailParams() ;
    //Aufruf des BAPIs CompanyCode.GetDetail auf die Objektinstanz:
          companyCode.getdetail(connection,      aCompanyCodeGetdetailParams);
      //Splitting the parameter object into its separate components
      //(Struktur):
          Bapi0002_2Structure struct = aCompanyCodeGetdetailParams.getCompanycodeDetail() ;
          System.out.println ("The details of the companycode are : ") ;
      //Splitting the structure into individual fields:          
          System.out.println ("CompCode :           '" + struct.getCompCode()  + "'" );
          System.out.println ("CompName :           '" + struct.getCompName()  + "'" );
          System.out.println ("City1 :              '" + struct.getCity()  + "'" );
          System.out.println ("Country1 :           '" + struct.getCountry() + "'" );
          System.out.println ("Currency :           '" + struct.getCurrency() + "'" );
          System.out.println ("Langu1 :             '" + struct.getLangu() + "'" );
          System.out.println ("ChrtAccts :          '" + struct.getChrtAccts() + "'" );
          System.out.println ("FyVariant :          '" + struct.getFyVariant() + "'" );
          System.out.println ("VatRegNo :           '" + struct.getVatRegNo() + "'" );
          System.out.println ("Company :            '" + struct.getCompany() + "'" );
          System.out.println ("AddrNo :             '" + struct.getAddrNo() + "'" );     
          System.out.println() ;
     catch (Exception ex)     
          System.out.println("Exception in printDetails() : " + ex) ;
     return;
private static void printList(IRfcConnection connection)
     try     
      //Declaring the parameter object:           
          CompanyCodeGetlistParams aCompanyCodeGetlistParams =
               new CompanyCodeGetlistParams() ;
      //Actual BAPI call:
          CompanyCode.getlist(connection, aCompanyCodeGetlistParams);
      //Splitting the parameter objects into its separate components
      //(Table):
          Bapi0002_1Table table = aCompanyCodeGetlistParams.getCompanycodeList();
          int rowCount = table.getRowCount() ;
          System.out.println ("Returned table has " + rowCount + " lines.");
      //Evaluating the table row by row:
          for (int i = 0; i < rowCount; i++)
               Bapi0002_1TableRow row = table.getRow(i) ;
               System.out.println("\t" + row.getCompCode() + "\t" + row.getCompName()) ;
          System.out.println() ;
     catch (Exception ex)     
          System.out.println("Exception in printList() : " + ex) ;
     return;
Regards
Neha