JCo( Java Connector)

Question

Hi Guys,
Any one give some info abt JCo( Java Connector). Thanks in advance.
Thanks
Kiran.B

Answer 1

Hi Kiran,
Check the following example
SAP Java Connector - Excample 1: Simple RFC call
Scenario
We will call the RFC function module ZNAS_HIE1_GET_MEMBER_FARM.that returns members that have owned a farm. Input to the function is a farm number, and output is a table of members that have owned the farm and Owner number (Sequence number of owners).
Class testJCO is excuted and calls class GetMemberFarm method GetMemberFarmFromSap. Input parameters to GetMemberFarm are Farm and Owner number.
GetMemberFarmFromSap executes RFC ZNAS_HIE1_GET_MEMBER_FARM, that returns a table of members that have owned the farm from the input parameters.
GetMemberFarmFromSap loops through the table and finds the member where ZZCHCODE (Owner numer), is equal owner number from the input-parameters. and returns the member.
Code
Class testJCO
public class testJco
     public static void main(String[] args)
          GetMemberFarm testGetMemberFarm = new GetMemberFarm();
          String memberFarm= testGetMemberFarm.GetMemberFarmFromSap("0111020155","02");
          System.out.println("Memberfarm: " + memberFarm);
Class GetMemberFram
import com.sap.mw.jco.*;  //The JCO
public class GetMemberFarm {
  public String GetMemberFarmFromSap(String farm, String OwnerNumber)   
  {  String zzmemb ="";
        String memberFarm = "";
     JCO.Repository mRepository;
     JCO.Client mConnection = null;
     JCO.Function myFunction = null;
     //Create Connection to SAP
       try
            mConnection = JCO.createClient("800",           //SAP client
                                        "HFR",       //User ID
                                        "vimmer3",     //Password
                                        "EN",            //Language
                                        "53.205.22.71", //Host
                                        "03");           //System
         mConnection.connect();
         System.out.println("Connection OK");
       catch (Exception ex)
            System.out.println(ex);
      // Create function and parameters
      try
        //Create repository
        mRepository = new JCO.Repository( "GetMember", mConnection );
        //Get a function template from the repository
        IFunctionTemplate ftemplate = mRepository.getFunctionTemplate("ZNAS_HIE1_GET_MEMBER_FARM");
        //Create function
        myFunction = new JCO.Function(ftemplate);
        System.out.println("Function created");
        //Set import parameter
        JCO.Field zzfarm = myFunction.getImportParameterList().getField("ZZFARM");
        zzfarm.setValue(farm);
        System.out.println("Parameters ok");
     catch (Exception ex)       
          System.out.println(ex);
     // Execute function
     try
          mConnection.execute(myFunction);
        System.out.println("RFC Call OK");          
     catch (Exception ex)      
      {  System.out.println(ex); //Exception from function          
     // Handle return table GT_HIERARCHY
     // Loop over the table and find the record that
     // has ZZCHCODE = OwnerNumber from the
     // method parameters, and return Member for the
     // record
     JCO.Table gt_HIERARCHY = null;
     try
          gt_HIERARCHY=myFunction.getTableParameterList().getTable("GT_HIERARCHY");
          //Loop thhrough table and return the member that has
          // changecode (ZZCHCODE) = 02
          for (int i = 0; i < gt_HIERARCHY.getNumRows(); i++)
          {   gt_HIERARCHY.setRow(i);
              String zzchcode = gt_HIERARCHY.getString("ZZCHCODE");
              if (zzchcode.equals(OwnerNumber))                        
                   zzmemb = gt_HIERARCHY.getString("ZZMEMB");                   
     catch (Exception ex)      
      {  System.out.println(ex);           
     // Disconnect from SAP
     try
         mConnection.disconnect();  
         System.out.println("Disconnected from SAP");
      catch (Exception ex)
           System.out.println(ex);
      return zzmemb;
} //public class GetMemberFarm
Tips and tricks for the Java connector
How to set and import parameter - Field
Give the import parameter SALESDOCUMENT the value "00006973":
JCO.Field SalesDocumentField = jcoFunction.getImportParameterList().getField("SALESDOCUMENT");
SalesDocumentField.setValue("00006973");
How to handle an import parameter - Table
JCO.Table ORDER_PARTNERS = jcoFunction.getTableParameterList().getTable("ORDER_PARTNERS");
ORDER_PARTNERS.appendRow();
ORDER_PARTNERS.setValue("AG","PARTN_ROLE");
ORDER_PARTNERS.setValue("0000001032","PARTN_NUMB");
How to handle an import parameter - Structure
JCO.Structure order_header_inx = jcoFunction.getImportParameterList().getStructure("ORDER_HEADER_INX");
order_header_inx.setValue("I","UPDATEFLAG");
order_header_inx.setValue("X","DOC_TYPE");
How to handle an export parameter - Table
JCO.Table myTable = jcoFunction.getTableParameterList().getTable("STATUSINFO");
for (int i=0; i < myTable.getNumRows(); i++)
  myTable.setRow(i);
  // Retrieve the value of the field DOC_DATE
  oDocDate = myTable.getField("DOC_DATE").getValue();
How to handle BAPI return table
Meesage type and message is stored in vector bapiReturn.
Vector bapiReturn;
JCO.Table jcoReturn = jcoFunction.getTableParameterList().getTable("RETURN");
    for (int i = 0; i < jcoReturn.getNumRows(); i++)
    { jcoReturn.setRow(i);
      String Message = jcoReturn.getField("TYPE").getValue() + " " +
                       jcoReturn.getField("MESSAGE").getValue();
      bapiReturn.setSize(i + 1);
      bapiReturn.setElementAt(new String(Message),i );
Using COMMIT
    try
     { // Get a function template from the repository
       IFunctionTemplate ftemplate = mRepository.getFunctionTemplate("BAPI_TRANSACTION_COMMIT");
       // Create a function from the template
       jcoCommit = new JCO.Function(ftemplate);
       if ( jcoCommit == null )
         // Do something..;
    catch (Exception mException)
     {  mException.printStackTrace(); }
    // Execute COMMIT
    try
     { sapConnection1.mConnection.execute(jcoCommit);
    catch (Exception mException)
     { mException.printStackTrace(); }
Thanks and Good Luck
AK