How to access SAP database tables with Java (Jco)

Question

Hi!
I need to develop a Java Client for SAP with access to the SAP database. Is there a way to do this directly in Java (the db access) or do I have to use some ABAP logic in between to get the information to the java client? If so, are there any existing ABAP functions to read AND write db tables? Or do I have to create my own wrappers for each table I need to read and write?
Thanks,
Konrad

Answer 1

hi,
i am sending code .i think it will help u
     try {
               // Add a connection pool to the specified system
               //    The pool will be saved in the pool list to be used
               //    from other threads by JCO.getClient(SID).
               //    The pool must be explicitely removed by JCO.removeClientPool(SID)
                    this.objClient = JCO.createClient(strClient, // SAP client
                    strUserID, // userid
                    strPwd, // password
                    strLang, // language
                    strHost, // host name
                    strSysNr);
               this.objClient.connect();
               // Create a new repository
               //    The repository caches the function and structure definitions
               //    to be used for all calls to the system SID. The creation of
               //    redundant instances cause performance and memory waste.
               this.objIRepository =
                    JCO.createRepository("MYRepository", this.objClient);
          } catch (JCO.Exception ex) {
               System.out.println("Caught an exception: \n" + ex);
          JCO.Function objFunction =
               this
                    .objIRepository
                    .getFunctionTemplate("BAPI_MATERIAL_AVAILABILITY")
                    .getFunction();
          objFunction.getImportParameterList().setValue(strPlant, "PLANT");
          objFunction.getImportParameterList().setValue(strMaterial, "MATERIAL");
          objFunction.getImportParameterList().setValue(strQuantity, "UNIT");
          this.objClient.execute(objFunction);
          JCO.Structure ret =
               objFunction.getExportParameterList().getStructure("RETURN");
          String strRetMsg = ret.getString("MESSAGE");
          if (strRetMsg.equals("Unit  is not created in language")) {
               arrResult.add("error");
               return arrResult;
          } else {
               String strQty1 =
                    objFunction.getExportParameterList().getString("AV_QTY_PLT");
               if (strQty1.equals("0"))
                    result = "no";
               else
                    result = "yes";
               arrResult.add(result);
               return arrResult;