我目前正在開發一個通過rmi加載類的系統。該系統使用類加載器與服務器進行通信以獲取類。代碼如下。RMI UnmarshalException
服務器:
import rocks.squareRock;
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
public class Server extends UnicastRemoteObject
implements RemInterface {
public Server() throws RemoteException {
super();
}
public static void main(String argv[]) {
try {
Server serv = new Server();
Naming.rebind("RockServer", serv);
} catch (Throwable t) {
t.printStackTrace();
}
}
public Class<?> getRockClass(String type) {
if (type.equals("squareRock"))
return squareRock.class;
else
return null;
}
}
客戶:
import rocks.Rock;
import java.net.MalformedURLException;
import java.rmi.Naming;
import java.rmi.NotBoundException;
import java.rmi.RemoteException;
public class Client {
RemInterface reminterface = null;
RockLoader rl = null;
public Client() {
String strName = "rmi://127.0.0.1/RockServer";
try {
reminterface = (RemInterface) Naming.lookup(strName);
rl = new RockLoader(reminterface);
} catch (RemoteException e) {
e.printStackTrace();
} catch (NotBoundException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
}
loadRock("squareRock");
}
public Rock loadRock(String rock) {
try {
return (Rock) rl.loadClass(rock, false).newInstance();
} catch (Throwable t) {
return null;
}
}
}
接口:
public interface RemInterface {
public Class<?> getRockClass(String type) throws RemoteException;
}
RockLoader:
import java.io.Serializable;
public class RockLoader extends ClassLoader implements Serializable {
private RemInterface reminterface = null;
public RockLoader(RemInterface reminterface) {
super();
this.reminterface = reminterface;
}
@Override
protected synchronized Class<?> loadClass(String className, boolean resolve)
throws ClassNotFoundException {
try {
return reminterface.getRockClass(className);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}
我這個得到的錯誤是(客戶端):
java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
java.lang.ClassNotFoundException: SquareRock
這混淆了我,因爲我不是解組SquareRock實例,但一類。我唯一的想法是,我的類加載器可能是錯誤的。
[RMI ClassNotFoundException]的可能重複(http://stackoverflow.com/questions/6085064/rmi-classnotfoundexception) – EJP 2011-05-25 04:15:39