RMI，ServerException：RemoteException的

Question

我跟着這個教程： http://download.oracle.com/javase/1.5.0/docs/guide/rmi/hello/hello-world.html#2 而在3個笑着文件（接口Hello.java，和類Server.java和Client.java） 不幸的是，當我嘗試這樣運行服務器：

start java -classpath "D:\[...]\RMISample\src" example.hello.Server 

我得到這些例外：

Server exception: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 
    java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
    java.lang.ClassNotFoundException: example.hello.Hello 
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is: 
    java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
    java.lang.ClassNotFoundException: example.hello.Hello 
    at sun.rmi.server.UnicastServerRef.oldDispatch(UnicastServerRef.java:396) 
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:250) 
    at sun.rmi.transport.Transport$1.run(Transport.java:159) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at sun.rmi.transport.Transport.serviceCall(Transport.java:155) 
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535) 
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790) 
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) 
    at java.lang.Thread.run(Thread.java:662) 
    at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown Source) 
    at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source) 
    at sun.rmi.server.UnicastRef.invoke(Unknown Source) 
    at sun.rmi.registry.RegistryImpl_Stub.bind(Unknown Source) 
    at example.hello.Server.main(Server.java:26) 
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: 
    java.lang.ClassNotFoundException: example.hello.Hello 
    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$1.run(Transport.java:159) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at sun.rmi.transport.Transport.serviceCall(Transport.java:155) 
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:535) 
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:790) 
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:649) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) 
    at java.lang.Thread.run(Thread.java:662) 
Caused by: java.lang.ClassNotFoundException: example.hello.Hello 
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:248) 
    at java.lang.Class.forName0(Native Method) 
    at java.lang.Class.forName(Class.java:247) 
    at sun.rmi.server.LoaderHandler.loadProxyInterfaces(LoaderHandler.java:711) 
    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:628) 
    at java.rmi.server.RMIClassLoader.loadProxyClass(RMIClassLoader.java:294) 
    at sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStream.java:238) 
    at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1530) 
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1492) 
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1731) 
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1328) 
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:350) 
    ... 12 more 

什麼可能是錯誤的？ 問候

Answer 1

當您啓動服務器應用程序，你必須，該處RMI應該尋找類 您可以使用java.rmi.server.codebase屬性做到這一點，所以正確的命令是這樣的：

java -classpath "D:\[...]\bin" 
-Djava.rmi.server.codebase=file:/D:\[...]\bin/ example.hello.Server