我是一名学习java的学生，并获得了作为任务java RMI 我创建了4个文件
我在eclipse上安装了jr6插件，在默认端口上运行注册表 代码如下 的 hellointerface
package demo.rmi.hello.common;
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface helloInterface extends Remote {
/** This is a sample method. Delete it and add one of your own. */
public String simpleRemoteMethod(String arg) throws RemoteException;
public String say() throws RemoteException;
}
代码 remotehelloimpl
package demo.rmi.hello.server;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import demo.rmi.hello.common.helloInterface;
public class remotehelloImpl extends UnicastRemoteObject implements
helloInterface {
String message;
protected remotehelloImpl(String msg) throws RemoteException {
//super();
// TODO Auto-generated constructor stub
message=msg;
}
public String say() throws RemoteException {
// TODO Auto-generated method stub
return message;
}
@Override
public String simpleRemoteMethod(String arg) throws RemoteException {
// TODO Auto-generated method stub
return null;
}
}
helloserver的代码
package demo.rmi.hello.server;
import java.rmi.Naming;
import java.rmi.RMISecurityManager;
import demo.rmi.hello.common.helloInterface;
public class helloserver {
public static void main(String[] args) {
// TODO Auto-generated method stub
System.setSecurityManager(new RMISecurityManager());
try {
helloInterface h = new remotehelloImpl("Hello,From Me!");
Naming.rebind("rmi://localhost:1099/HelloService", h);
System.out.println ("Server is connected and ready for operation.");
}
catch (Exception e) {
System.out.println ("Server not connected: " + e);
}
}
}
* helloclient的代码 *
package demo.rmi.hello.client;
import java.rmi.Naming;
import java.rmi.RMISecurityManager;
import demo.rmi.hello.common.helloInterface;
public class helloclient {
/**
* @param args
*/
public static void main (String[] argv) {
System.setSecurityManager(new RMISecurityManager());
try {
helloInterface hello =(helloInterface) Naming.lookup ("rmi://localhost/HelloService");
System.out.println (hello.say());
}
catch (Exception e){
System.out.println ("HelloClient exception: " + e);}
}
}
我有两个安全策略（在eclipse上自动生成） 政策一 //这个文件是由RMI Plugin for Eclipse生成的。
///////////////////////////////////////////////////////////////
// This is a sample policy file that grants the application all permissions.
// A policy file is needed by the RMISecurityManager and your application might
// not work after installing the RMISecurityManager unless you provide a
// security policy file at launch.
//
// You can configure the security policy of a launched application using either
// the RMI Launcher or by manually setting the java.security.policy property.
//
// SECURITY NOTE: This security policy is good for development. For deployment
// you may need a stricter security policy.
//
// For more information see:
// http://java.sun.com/docs/books/tutorial/rmi/running.html
// http://java.sun.com/j2se/1.5.0/docs/guide/security/PolicyFiles.html
//
grant {
permission java.security.AllPermission;
// Other options:
// permission java.net.SocketPermission "127.0.0.1:1024-", "accept, connect, listen, resolve";
// permission java.net.SocketPermission "localhost:1024-", "accept, connect, listen, resolve";
// From http://java.sun.com/docs/books/tutorial/rmi/running.html
// Copyright 1995-2005 Sun Microsystems, Inc. Reprinted with permission
// permission java.net.SocketPermission "*:1024-65535", "connect,accept";
// permission java.net.SocketPermission "*:80", "connect";
// permission java.net.SocketPermission "*:1024-65535", "connect,accept";
// permission java.io.FilePermission "c:\\home\\ann\\public_html\\classes\\-", "read";
// permission java.io.FilePermission "c:\\home\\jones\\public_html\\classes\\-", "read";
};
* 安全政策2
// This file was generated by the RMI Plugin for Eclipse.
///////////////////////////////////////////////////////////////
// This is a sample policy file that grants the application all permissions.
// A policy file is needed by the RMISecurityManager and your application might
// not work after installing the RMISecurityManager unless you provide a
// security policy file at launch.
//
// You can configure the security policy of a launched application using either
// the RMI Launcher or by manually setting the java.security.policy property.
//
// SECURITY NOTE: This security policy is good for development. For deployment
// you may need a stricter security policy.
//
// For more information see:
// http://java.sun.com/docs/books/tutorial/rmi/running.html
// http://java.sun.com/j2se/1.5.0/docs/guide/security/PolicyFiles.html
//
grant {
permission java.security.AllPermission;
// Other options:
// permission java.net.SocketPermission "127.0.0.1:1024-", "accept, connect, listen, resolve";
// permission java.net.SocketPermission "localhost:1024-", "accept, connect, listen, resolve";
// From http://java.sun.com/docs/books/tutorial/rmi/running.html
// Copyright 1995-2005 Sun Microsystems, Inc. Reprinted with permission
// permission java.net.SocketPermission "*:1024-65535", "connect,accept";
// permission java.net.SocketPermission "*:80", "connect";
// permission java.net.SocketPermission "*:1024-65535", "connect,accept";
// permission java.io.FilePermission "c:\\home\\ann\\public_html\\classes\\-", "read";
// permission java.io.FilePermission "c:\\home\\jones\\public_html\\classes\\-", "read";
};
我首先启动注册表，然后启动服务器，但我发现以下错误，
Server not connected: java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: access to class loader denied