使用Java connector消费ABAP系统的函数

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我的ABAP系统有个函数名叫ZDIS_GET_UPSELL_MATERIALS，输入一个customer ID和product ID，会输出为这对客户和product组合维护的一组Upsell product ID和描述信息。
测试如下：

下面是使用Java消费该函数的代码：

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, "ldcixcd.wdf.sap.corp"); connectProperties.setProperty(DestinationDataProvider.JCO_SYSNR, "00"); connectProperties.setProperty(DestinationDataProvider.JCO_CLIENT, "111"); connectProperties.setProperty(DestinationDataProvider.JCO_USER, "WANGJER"); connectProperties.setProperty(DestinationDataProvider.JCO_PASSWD, "Saptest1"); 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; i++){ 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); } } }

为简单起见没有使用Google的gson库进行Json的序列化。
执行结果：

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