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我不明白如何使用代码库。

我有以下结构:

CLIENT:
Client.java
client.policy

SERVER:
Server.java
Hello.java
HelloInterfaces.java

HelloInterfaces.java

public interface HelloInterfaces extends Remote {
}

你好.java

public class Hello extends UnicastRemoteObject implements HelloInterfaces{

    public Hello() throws RemoteException{
    }

}

服务器.java

public class Server {

    public static void main(String[] arg) throws RemoteException {
        Registry reg = LocateRegistry.createRegistry(1099);
        reg.rebind("Hello", new Hello());
        System.out.println("Ready");
    }
}

客户端.java

public class Client {

    public static void main(String[] args) throws RemoteException, NotBoundException, MalformedURLException {
  String host="192.168.1.227";  //IP SERVER
        System.setProperty("java.rmi.server.codebase", "http://" + host + ":8080");
        System.setProperty("java.security.policy", "client.policy");
        System.setSecurityManager(new RMISecurityManager());
        Registry reg = LocateRegistry.getRegistry(host);
        System.out.println("Regitry Found!");
        System.out.println(reg.list().length);
        System.out.println(reg.list()[0]);
        HelloInterfaces h;
        h = (HelloInterfaces) reg.lookup("Hello");
        System.out.println(h);
    }
}

客户政策

grant {
permission java.security.AllPermission;
};

直接从 Netbeans 在服务器(带有 Linux 的虚拟机)上执行: 输出服务器:准备就绪!

在客户端,我使用选项编译了源代码--classpath .:Server.jar(其中 Server.jar 包含 HelloInterfaces.class)。

执行客户端:

  输出客户端:
  发现注册表!
  1
  你好
  (跑步......)

两分钟后:

Exception in thread "main" java.rmi.UnmarshalException: error unmarshalling return; nested exception is: 
    java.lang.ClassNotFoundException: HelloInterfaces
    at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
    at Client.main(Client.java:36)
Caused by: java.lang.ClassNotFoundException: HelloInterfaces
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.rmi.server.LoaderHandler$Loader.loadClass(LoaderHandler.java:1206)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:270)
    at sun.rmi.server.LoaderHandler.loadClassForName(LoaderHandler.java:1219)
    at sun.rmi.server.LoaderHandler.loadProxyInterfaces(LoaderHandler.java:729)
    at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:673)
    at sun.rmi.server.LoaderHandler.loadProxyClass(LoaderHandler.java:610)
    at java.rmi.server.RMIClassLoader$2.loadProxyClass(RMIClassLoader.java:646)
    at java.rmi.server.RMIClassLoader.loadProxyClass(RMIClassLoader.java:311)
    at sun.rmi.server.MarshalInputStream.resolveProxyClass(MarshalInputStream.java:255)
    at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1558)
    at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1514)
    at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771)
    at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
    at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
    ... 2 more

此外,在包含 的目录服务器上.class,我在端口 8080 上运行了一个 python httpserver。(与 NanoHTTP 相同的结果,用 java 编写的 http 服务器)

应用程序客户端联系 http 服务器,因为 python httpserver 输出:

192.168.1.24 - - “GET / HTTP/1.1” 200 -
4

1 回答 1

1

代码库是包含 .class 文件的包结构层次结构的 JAR 文件或目录的 URL 列表。仅主机和端口的 URL 似乎不太可能符合该描述。

于 2014-05-05T22:21:54.460 回答