java rfc接口_java调用sap的RFC接口
sap目前是世界上最大的也是使用最多的ERP系統，很多大型系統都將自己的業務數據放到了SAP系統來進行管理，那么當別的系統需要這些數據時，就需要從SAP中獲取這些數據。SAP中有各種不同類型的接口，RFC，PI等等。下面記錄的是java如何調用RFC的接口。網上可以找到很多類似的文章，代碼也是以前的老手寫的，也比較易懂，這里再記下來主要是為了以后找起來方便。
java調用RFC接口需要用到sapjco3.jar，windows下還需要將文件sapjco3.dll文件放到system32的目錄下，linux下同樣需要把sapjco3.so放入項目的執行目錄下。代碼如下：
JOCTest：
package jco;
import com.sap.conn.jco.JCoFunction;
import com.sap.conn.jco.JCoParameterList;
import com.sap.conn.jco.JCoTable;
import java.util.ArrayList;
import java.util.List;
public class JCOTest {
public static void main(String[] args)
{
getUser();
}
public static List getUser() {
JCoFunction function = RfcManager.getFunction("FUNCION_USER");
RfcManager.execute(function);
JCoParameterList outputParam = function.getTableParameterList();
JCoTable bt = outputParam.getTable("TABLEOUT");
List list = new ArrayList();
for (int i = 0; i < bt.getNumRows(); i++) {
bt.setRow(i);
User user = new User();
user.setUserName(bt.getString("USER_NAME"));
list.add(user);
}
return list;
}
}RfcManager：
package jco;
import com.sap.conn.jco.*;
import com.sap.conn.jco.ext.Environment;
import java.io.IOException;
import java.util.Properties;
public final class RfcManager {
private static final String ABAP_AS_POOLED = "ABAP_AS_POOL";
private static JCOProvider provider;
private static JCoDestination destination;
static {
Properties properties = loadProperties();
// catch IllegalStateException if an instance is already registered
try {
provider = new JCOProvider();
Environment.registerDestinationDataProvider(provider);
provider.changePropertiesForABAP_AS(ABAP_AS_POOLED, properties);
} catch (IllegalStateException e) {
System.out.println(e.getMessage());
}
}
public static Properties loadProperties() {
Properties props=new Properties();
props.setProperty("jco.client.user","value");
props.setProperty("jco.client.passwd","value");
props.setProperty("jco.client.lang", "value");
props.setProperty("jco.client.client","value");
props.setProperty("jco.client.sysnr","value");
props.setProperty("jco.client.ashost","value");
props.setProperty("jco.destination.peak_limit","value");
props.setProperty("jco.destination.pool_capacity","value");
return props;
}
public static JCoDestination getDestination() throws JCoException {
if (destination == null) {
destination = JCoDestinationManager.getDestination(ABAP_AS_POOLED);
}
return destination;
}
public static void execute(JCoFunction function) {
System.out.println("SAP Function Name : " + function.getName());
try {
function.execute(getDestination());
} catch (JCoException e) {
e.printStackTrace();
}
}
public static JCoFunction getFunction(String functionName) {
JCoFunction function = null;
try {
function = getDestination().getRepository().getFunctionTemplate(functionName).getFunction();
} catch (JCoException e) {
e.printStackTrace();
} catch (NullPointerException e) {
e.printStackTrace();
}
return function;
}
}
package jco;
import com.sap.conn.jco.ext.*;
import java.util.HashMap;
import java.util.Properties;
public class JCOProvider implements DestinationDataProvider,SessionReferenceProvider {
private HashMap secureDBStorage = new HashMap();
private DestinationDataEventListener eL;
@Override
public Properties getDestinationProperties(String destinationName) {
try
{
//read the destination from DB
Properties p = secureDBStorage.get(destinationName);
if(p!=null)
{
//check if all is correct, for example
if(p.isEmpty()){
System.out.println("destination configuration is incorrect!");
}
return p;
}
System.out.println("properties is null ...");
return null;
}
catch(RuntimeException re)
{
System.out.println("internal error!");
return null;
}
}
@Override
public void setDestinationDataEventListener(
DestinationDataEventListener eventListener) {
this.eL = eventListener;
System.out.println("eventListener assigned ! ");
}
@Override
public boolean supportsEvents() {
return true;
}
//implementation that saves the properties in a very secure way
public void changePropertiesForABAP_AS(String destName, Properties properties) {
synchronized(secureDBStorage)
{
if(properties==null)
{
if(secureDBStorage.remove(destName)!=null)
eL.deleted(destName);
}
else
{
secureDBStorage.put(destName, properties);
eL.updated(destName); // create or updated
}
}
}
public JCoSessionReference getCurrentSessionReference(String scopeType) {
RfcSessionReference sesRef = JcoMutiThread.localSessionReference.get();
if (sesRef != null)
return sesRef;
throw new RuntimeException("Unknown thread:" + Thread.currentThread().getId());
}
public boolean isSessionAlive(String sessionId) {
return false;
}
public void jcoServerSessionContinued(String sessionID)
throws SessionException {
}
public void jcoServerSessionFinished(String sessionID) {
}
public void jcoServerSessionPassivated(String sessionID)
throws SessionException {
}
public JCoSessionReference jcoServerSessionStarted() throws SessionException {
return null;
}
}
package jco;
import com.sap.conn.jco.ext.JCoSessionReference;
import java.util.concurrent.atomic.AtomicInteger;
public class RfcSessionReference implements JCoSessionReference {
static AtomicInteger atomicInt = new AtomicInteger(0);
private String id = "session-" + String.valueOf(atomicInt.addAndGet(1));;
public void contextFinished() {
}
public void contextStarted() {
}
public String getID() {
return id;
}
}
package jco;
public interface IMultiStepJob {
public boolean runNextStep();
String getName();
public void cleanUp();
}
package jco;
import java.util.Hashtable;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
public class JcoMutiThread extends Thread {
public static Hashtable sessions = new Hashtable();
public static ThreadLocal localSessionReference = new ThreadLocal();
private BlockingQueue queue ;
private CountDownLatch doneSignal;
private boolean isSapBusy = false;
public JcoMutiThread(CountDownLatch doneSignal, BlockingQueue queue) {
this.doneSignal = doneSignal;
this.queue = queue;
}
@Override
public void run() {
try {
for (;;) {
IMultiStepJob job = queue.poll(10, TimeUnit.SECONDS);
// stop if nothing to do
if (job == null){
break;
}
if(isSapBusy){
Thread.sleep(5000);
}
RfcSessionReference sesRef = sessions.get(job);
if (sesRef == null) {
sesRef = new RfcSessionReference();
sessions.put(job, sesRef);
}
localSessionReference.set(sesRef);
//Thread Started ("Task " + job.getName() + " is started.");
try {
isSapBusy = job.runNextStep();
} catch (Throwable th) {
th.printStackTrace();
}
if(isSapBusy){
//sap system busy, try again later("Task " + job.getName() + " is passivated.");
queue.add(job);
}else{
//" call sap finished, Task " + job.getName() ;
sessions.remove(job);
job.cleanUp();
}
localSessionReference.set(null);
}
} catch (InterruptedException e) {
// just leave
} finally {
doneSignal.countDown();
}
}
}
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