How to use Java connector to consume functions of ABAP system

Editor to share with you how to use Java connector consumer ABAP system functions, I believe that most people do not know much, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

My ABAP system has a function called ZDIS_GET_UPSELL_MATERIALS, which inputs a customer ID and product ID and outputs a set of Upsell product ID and description information maintained for the customer and product combination.

The tests are as follows:

Here is the code that consumes the function using Java:

Package jco;import java.io.File;import java.io.FileOutputStream;import java.util.Properties;import com.sap.conn.jco.JCoDestination;import com.sap.conn.jco.JCoDestinationManager;import com.sap.conn.jco.JCoException;import com.sap.conn.jco.JCoFunction;import com.sap.conn.jco.JCoParameterList;import com.sap.conn.jco.JCoRepository;import com.sap.conn.jco.JCoTable;import com.sap.conn.jco.ext.DestinationDataProvider / * * basic examples for Java to ABAP communication * See help: https://help.sap.com/saphelp_nwpi711/helpdata/en/48/70792c872c1b5ae10000000a42189c/frameset.htm * / public class StepByStepClient {static String DESTINATION_NAME = "ABAP_AS_WITHOUT_POOL"; static public final String ABAP_DURATION = "abapLayerDuration"; static public final String UPSELL_PRODUCT = "upsellProducts"; static public final String PRODUCT_ID = "productID"; static public final String PRODUCT_TEXT = "productText" Static private Properties prepareProperty () {Properties connectProperties = new Properties (); connectProperties.setProperty (DestinationDataProvider.JCO_ASHOST, "your abap system host name"); connectProperties.setProperty (DestinationDataProvider.JCO_SYSNR, "00"); connectProperties.setProperty (DestinationDataProvider.JCO_CLIENT, "111"); connectProperties.setProperty (DestinationDataProvider.JCO_USER," WANGJER "); connectProperties.setProperty (DestinationDataProvider.JCO_PASSWD," your password ") ConnectProperties.setProperty (DestinationDataProvider.JCO_LANG, "en"); createDestinationDataFile (DESTINATION_NAME, connectProperties); connectProperties.setProperty (DestinationDataProvider.JCO_POOL_CAPACITY, "3"); connectProperties.setProperty (DestinationDataProvider.JCO_PEAK_LIMIT, "10"); createDestinationDataFile (DESTINATION_NAME, connectProperties); return connectProperties } static public void main (String [] arg) {createDestinationDataFile (DESTINATION_NAME, prepareProperty ()); JCoDestination destination = null; try {destination = JCoDestinationManager.getDestination (DESTINATION_NAME); JCoRepository repo = destination.getRepository () JCoFunction stfcConnection = repo.getFunction ("ZDIS_GET_UPSELL_MATERIALS"); JCoParameterList imports = stfcConnection.getImportParameterList (); String customerID = "1000040"; String materialID = "11"; imports.setValue ("IV_CUSTOMER_ID", customerID) Imports.setValue ("IV_MATERIAL_ID", materialID); stfcConnection.execute (destination); JCoParameterList exports = stfcConnection.getExportParameterList (); / / int result = exports.getInt ("EV_RESULT"); int abapDuration = exports.getInt ("EV_DURATION") StringBuilder sb = new StringBuilder (); sb.append ("{\"+ ABAP_DURATION +"\ ":" + abapDuration + ","); sb.append ("\"+ UPSELL_PRODUCT +"\ ": ["); JCoTable codes = exports.getTable ("ET_MATERIALS") Int row = codes.getNumRows (); System.out.println ("Total rows:" + row); System.out.println ("ABAP duration:" + abapDuration); for (int I = 0; I < row; iTunes +) {codes.setRow (I) System.out.println (codes.getString ("MATERIAL_ID") +'\ t' + codes.getString ("MATERIAL_TEXT")) Sb.append ("{\" + PRODUCT_ID + "\": "+ codes.getString (" MATERIAL_ID ") +", "+"\ "" + PRODUCT_TEXT + "\":\ "" + codes.getString ("MATERIAL_TEXT") + "\"); if (I < row-1) {sb.append ("},") } else {sb.append ("}");}} sb.append ("]}"); System.out.println ("Final json:" + sb.toString ()) } catch (JCoException e) {/ / TODO Auto-generated catch block e.printStackTrace ();}} static private void createDestinationDataFile (String destinationName, Properties connectProperties) {File destCfg = new File (destinationName+ ".jcoDestination") Try {FileOutputStream fos = new FileOutputStream (destCfg, false); connectProperties.store (fos, "for tests only!"); fos.close ();} catch (Exception e) {throw new RuntimeException ("Unable to create the destination files", e);}

Serialize Json without using Google's gson library for simplicity.

Execution result:

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