如何使用Java connector消费ABAP系统的函数

小编给大家分享一下如何使用Java connector消费ABAP系统的函数，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

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, "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; 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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