Java遠程方法調用實踐

服務器端業務接口
 

public interface Biz extends Remote {

 

public String aloha() throws RemoteException;

 

}

 

服務器端業務實現

public class BizImpl extends UnicastRemoteObject implements Biz {

private static final long serialVersionUID = -8559392326593037120L;

 

public BizImpl() throws RemoteException {

super();

}

 

@Override

public String aloha() throws RemoteException {

return "Aloha Baby.";

}

}

服務器註冊遠程實現名稱
 

public class Server {

public Server() {

try {

Biz bis = new BizImpl();

// style-1

Registry registry = LocateRegistry.createRegistry(RMIParameter.PORT);

registry.rebind(RMIParameter.NAME, bis); // replace existing binding name

// style-2

//java.rmi.Naming.rebind(RMIParameter.NAME, bis); // replace existing binding name

} catch (Exception e) {

e.printStackTrace();

}

}

 

public static void main(String args[]) {

new Server();

}

}

 

style-2 須要指定一個Policy文件或者運行rmiregistry

 

java -Djava.security.policy=folder_x/rmi/policy_file creative.fire.rmi.Server

Policy文件的內容爲：

grant{

      permission java.net.SocketPermission "localhost:9527", "connect, resolve";

};

 

運行rmiregistry是修改 JDK 目錄下的jre/lib/security/java.policy

rmiregistry（linux）

start rmiregistry(windows)

 

容許任何人(targets)做任何事情(actions)：

grant{

        permission java.security.AllPermission "","";

};

OR

grant {

  permission java.security.AllPermission;

};

客戶端打樁調用
 

public class Client {

public static void main(String args[]) {

try {

Biz bis = (Biz) Naming.lookup(RMIPREFIX + PORT + NAME);

System.out.println(bis.aloha());

} catch (Exception e) {

e.printStackTrace();

}

}

}