EJB2.0教程 详解EJB技术及实现原理

 
import javax.ejb.*;  
import java.rmi.*;  
 
public interface AddCount extends EJBObject  
{  
        public int addCount(int a,int b) throws RemoteException;  
} 

 
import javax.ejb.*;  
import java.rmi.*;  
 
public interface AddCountHome extends EJBHome  
{  
        public AddCount create() throws RemoteException,CreateException;  
} 

 
import javax.ejb.*;  
 
public class AddCountBean implements SessionBean  
{  
        public void ejbCreate()  
        {  
        }  
        public void setSessionContext(SessionContext ctx)  
                       throws EJBException,  
                              java.rmi.RemoteException  
        {  
        }  
        public void ejbRemove()  
               throws EJBException,  
                      java.rmi.RemoteException  
        {  
        }  
 
        public void ejbActivate()  
                 throws EJBException,  
                        java.rmi.RemoteException  
        {  
        }  
        public void ejbPassivate()  
                  throws EJBException,  
                         java.rmi.RemoteException  
        {  
        }  
        public int addCount(double a,double b)  
        {  
                return a+b;  
        }  
} 

1. xml version="1.0" encoding="UTF-8"?> 
2. Enterprise JavaBeans 2.0//EN" "http://java.sun.com/dtd/ejb-jar_2_0.dtd"> 
3. <ejb-jar> 
4.     <enterprise-beans> 
5.         <session> 
6.             <display-name>firstdisplay-name> 
7.             <ejb-name>addejb-name> 
9.             <home>AddCountHomehome> 
10.             <remote>AddCountremote> 
11.             <ejb-class>AddCountBeanejb-class> 
13.             <session-type>Statelesssession-type> 
14.             <transaction-type>Containertransaction-type>       
15.         session> 
16.     enterprise-beans> 
17.     <assembly-descriptor> 
18.         <container-transaction> 
19.             <method> 
20.                 <ejb-name>addejb-name> 
21.                 <method-name>*method-name> 
22.             method> 
23.             <trans-attribute>Requiredtrans-attribute> 
24.         container-transaction> 
25.           
26.     assembly-descriptor> 
27. ejb-jar> 

1. xml version="1.0" encoding="UTF-8"?> 
3. <weblogic-ejb-jar> 
4.     <weblogic-enterprise-bean> 
5.         <ejb-name> 
6.                 add    
7.                 ejb-name> 
8.           
9.         <jndi-name>rainnightjndi-name> 
11.     weblogic-enterprise-bean> 
12. weblogic-ejb-jar> 

1. import java.util.*;  
2. import java.naming.*;  
3. import java.rim.*;  
4. public class AddTest{  
5.         public static void main(String bb[])throws Exception{  
6.                 Hashtable hash = new Hashtable();  
7.                 hash.put(Context.INITIAL_COUNTEXT_FACTORY,  
8.                                 "weblogic.jndi.WLInitialContextFactory");  
9.                 hash.put(Context.PROVIDER_URL,  
10.                                 "t3://localhost:7001");  
11.                 Object obj = context.lookup("rainnight");  
12.                 AddCountHome home = (AddCountHome)PortableRemoteObject(obj,AddCountHome.class);  
13.                 AddCount local = home.create();  
14.                 System.out.println(local.add(1,1));  
15.         }  
16. }