Hi all,

I got a question, that is , i programming in three tier model, JSP/JavaBean ---> EJB ---> SQL. at the EJB side , it had a real object in it, but in JSP(Client) got null.

i had a interface , for example :

public interface SysUserInf extends java.io.Serializable {
public String getName();
public void setName(String Name);
}
then i have a abstract class, as my common implement. like this..

public abstract class AbstractSysUser implements SysUserInf {
privte String _Name = "";
public String getName() {
return _Name;
}
public void setName(String Name){
_Name = Name;
}
}

and then some classes inherit from AbstractSysUser for other purpose ... like grep data from Database...etc...
_________________________________________________________
Ok... at EJB side, i wrote a stateful/less bean,

public class WantSysUserBean implements javax.ejb.SessionBean { ...... // i had a method like this...

public SysUser getSysUser() throws java.rmi.RemoteException {
SysUser _result = null;
_result = SomeMethodgetConcertSysUserObject();
System.out.println("I got SysUser , Name : " + _result.getName());
return _result;
}
.....}

__________________________________________________________
Client... (JSP/JavaBean) Side :

....public JavaBeanGetSysUser() {
SysUserInf _result = null;
_sysuserejb = ... lookup Want SysUser EJB ...got home, create ejb....;
_result = _sysuserejb.getSysUser();
if ( _result == null ) {
System.out.println("So bad, it got null");
}
}
__________________________________________________

At last, JSP (client side) got null, return "So bad, it go null", but look in ejb, it really got the object.... why it via RMI/IIOP ( <--- not sure :-) ), it return NULL!!!

Please help.

Gordon