这是代码：
聊天客户端程序：
import java.rmi.*;
import java.rmi.registry.*;
import java.util.Scanner;
import java.io.*;
class chatClientProg{
public static void main(String args[]){
Scanner input = new Scanner(System.in);
String myMessage,userName,infoString;
InputStreamReader convertor = new InputStreamReader(System.in);
BufferedReader in = new BufferedReader(convertor);
System.out.println("Enter your name :");
userName = input.nextLine();
try{
chatInterface objHandle = (chatInterface)Naming.lookup("rmi://192.168.42.58/sumitChatApp/myChatRemoteObj");
infoString = userName + " joined the chat.";
chatCustomMessage infoMessage = new chatCustomMessage(infoString);
infoMessage = objHandle.printMessage(infoMessage);
//Runtime.getRuntime().exec("cmd /c cls"); // not working on the current cmd...
System.out.println("Welcome to the Chat Application "+userName+"!");
Thread.sleep(1500);
//Runtime.getRuntime().exec("cmd /c cls");
while(true){
myMessage = in.readLine();
myMessage = userName+" : "+myMessage;
chatCustomMessage mess = new chatCustomMessage(myMessage);
mess = objHandle.printMessage(mess);
}
}
catch(Exception ex){
System.out.println("Exception caught");
ex.printStackTrace();
}
}
}
聊天客户端Prog2：
// this is the client program
import java.rmi.*;
import java.rmi.registry.*;
import java.util.Scanner;
import java.io.*;
class chatClientProg2{
public static void main(String args[]){
Scanner input = new Scanner(System.in);
String myMessage,userName,infoString;
InputStreamReader convertor = new InputStreamReader(System.in);
BufferedReader in = new BufferedReader(convertor);
System.out.println("Enter your name :");
userName = input.nextLine();
try{
chatInterface objHandle = (chatInterface)Naming.lookup("rmi://192.168.42.58/sumitChatApp/myChatRemoteObj");
infoString = userName + " joined the chat.";
chatCustomMessage infoMessage = new chatCustomMessage(infoString);
infoMessage = objHandle.printMessage(infoMessage);
//Runtime.getRuntime().exec("cmd /c cls"); // not working on the current cmd...
System.out.println("Welcome to the Chat Application "+userName+"!");
Thread.sleep(1500);
//Runtime.getRuntime().exec("cmd /c cls");
while(true){
myMessage = in.readLine();
myMessage = userName+" : "+myMessage;
chatCustomMessage mess = new chatCustomMessage(myMessage);
mess = objHandle.printMessage(mess);
}
}
catch(Exception ex){
System.out.println("Exception caught");
ex.printStackTrace();
}
}
}
聊天服务器程序：
// server program... i.e chatServerProg
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.*;
class chatServerProg{
public static void main(String args[]){
try{
/* Set the security manager */
System.setProperty("java.security.policy","policy.all");
System.setSecurityManager(new RMISecurityManager());
chatClass obj = new chatClass();
Naming.rebind("rmi://192.168.42.58/sumitChatApp/myChatRemoteObj",obj);
}
catch(Exception ex){
System.out.println("Exception caught");
ex.printStackTrace();
}
}
}
聊天服务器Prog2：
// server program... i.e chatServerProg
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.*;
class chatServerProg2{
public static void main(String args[]){
try{
/* Set the security manager */
System.setProperty("java.security.policy","policy.all");
System.setSecurityManager(new RMISecurityManager());
chatClass obj = new chatClass();
Naming.rebind("rmi://192.168.42.58/sumitChatApp/myChatRemoteObj",obj);
}
catch(Exception ex){
System.out.println("Exception caught");
ex.printStackTrace();
}
}
}
直到昨天它都工作正常，但突然之间它开始抛出这些异常 idk 为什么。
客户端异常：
Enter your name :
sid
Exception caught
java.rmi.NotBoundException: sumitChatApp/myChatRemoteObj
at sun.rmi.registry.RegistryImpl.lookup(RegistryImpl.java:106)
at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:386
)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
at sun.rmi.transport.Transport$1.run(Transport.java:159)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:5
35)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTranspor
t.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport
.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExec
utor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
.java:907)
at java.lang.Thread.run(Thread.java:619)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknow
n Source)
at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
at sun.rmi.server.UnicastRef.invoke(Unknown Source)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at java.rmi.Naming.lookup(Unknown Source)
at chatClientProg.main(chatClientProg.java:18)
服务器端异常：
Exception caught
java.rmi.ServerException: RemoteException occurred in server thread; nested exce
ption is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested excep
tion is:
java.lang.ClassNotFoundException: chatInterface
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:396
)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
at sun.rmi.transport.Transport$1.run(Transport.java:159)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:5
35)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTranspor
t.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport
.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExec
utor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
.java:907)
at java.lang.Thread.run(Thread.java:619)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknow
n Source)
at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
at sun.rmi.server.UnicastRef.invoke(Unknown Source)
at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
at java.rmi.Naming.rebind(Unknown Source)
at chatServerProg.main(chatServerProg.java:15)
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested ex
ception is:
java.lang.ClassNotFoundException: chatInterface
at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:386
)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250)
at sun.rmi.transport.Transport$1.run(Transport.java:159)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:155)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:5
35)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTranspor
t.java:790)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport
.java:649)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExec
utor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
.java:907)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassNotFoundException: chatInterface
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at sun.rmi.server.LoaderHandler.loadProxyInterfaces(LoaderHandler.java:7
11)
at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:655)
at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:592)
at java.rmi.server.RMIClassLoader$2.loadProxyClass(RMIClassLoader.java:6
28)
at java.rmi.server.RMIClassLoader.loadProxyClass(RMIClassLoader.java:294
)
at sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStrea
m.java:238)
at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1531)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1493)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1
732)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351)
... 12 more
现在我已经正确更改了所有四个程序的 IP 地址，我每次都运行 rmiregistry，我什至将策略文件放在同一个文件夹中。
那么这个问题可能是什么？
聊天界面：
// this is the interface for the sumitChat
import java.rmi.*;
interface chatInterface extends Remote{
public chatCustomMessage printMessage(chatCustomMessage arg) throws RemoteException;
}
聊天类：
// the chatClass that will implement the chatInterface
import java.rmi.*;
import java.rmi.server.*;
import java.rmi.registry.*;
class chatClass extends UnicastRemoteObject implements chatInterface{
public chatClass() throws RemoteException{
// constructor
}
public chatCustomMessage printMessage(chatCustomMessage obj) throws RemoteException{
System.out.println(obj.message);
return obj;
}
}