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最新推荐文章于 2025-08-14 09:11:10 发布

转载最新推荐文章于 2025-08-14 09:11:10 发布 · 71 阅读

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原文链接：https://my.oschina.net/l1z2g9/blog/63311

文章标签：

#java #数据库

为什么80%的码农都做不了架构师？>>>

package rmi;

import java.rmi.Remote;
import java.rmi.RemoteException;

public interface MyService extends Remote {
	void sayHi(String name) throws RemoteException;
}

package rmi;

import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;

public class MyServiceImpl extends UnicastRemoteObject implements MyService {

	private static final long serialVersionUID = -8550790423811608199L;

	protected MyServiceImpl() throws RemoteException {
		super();
	}

	public void sayHi(String name) {
		System.out.println("hello " + name);
	}

}

package rmi;

import java.net.MalformedURLException;
import java.rmi.Naming;
import java.rmi.RMISecurityManager;
import java.rmi.RemoteException;

public class RmiServer {
	public static void main(String[] args) {
		if (System.getSecurityManager() == null) {
			System.setSecurityManager(new RMISecurityManager());
		}

		// String server = "0.0.0.0";
		String server = "10.13.139.98";
		String rmiPort = "2012";
		System.out.println("starting server " + server);
		try {
			Naming.rebind("rmi://" + server + ":" + rmiPort + "/MyService",
					new MyServiceImpl());
		} catch (RemoteException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

package rmi;

import java.net.MalformedURLException;
import java.rmi.Naming;
import java.rmi.NotBoundException;
import java.rmi.RemoteException;

public class Client {
	public static void morning() {
		String server = "10.13.139.100";
		String rmiPort = "2012";
		try {
			MyService myService = (MyService) Naming.lookup("rmi://" + server
					+ ":" + rmiPort + "/MyService");
			System.out.println("myService = " + myService);
			myService.sayHi("Forest, Good morning!");
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (RemoteException e) {
			e.printStackTrace();
		} catch (NotBoundException e) {
			e.printStackTrace();
		}
	}

	public static void main(String[] args) {
		morning();
	}
}

my.policy

grant codeBase "file:///C:/workspace/rmi/bin/*"{
  permission java.net.SocketPermission "0.0.0.0:2012", "connect,resolve";
};

Run commands,

C:\j2sdk1.4.2_10\bin\rmic.exe rmi.MyServiceImpl

rmiregistry.exe 2012

java.exe -Djava.rmi.server.hostname=10.13.139.98 -Djava.rmi.server.codebase=file:///C:/workspace/rmi/bin/ -Djava.security.policy=my.policy -cp . rmi.RmiServer

java.exe -cp . rmi.Client

注意：

1. 如果机器上有多个IP，可以使用java.rmi.server.hostname指定其中一个，如果打印lookup后的对象，会看到MyServiceImpl_Stub[RemoteStub [ref: [endpoint:[10.13.139.98:1085](remote),objID:[f72617:1380931e011:-8000, 0]]]]

2. java.rmi.server.codebase=file:///C:/workspace/rmi/bin/，windows下file后要有3个/，和最后要有个/

3. my.policy中的*，代表该目录下的所有全限定类拥有权限，是classpath的路径，而不是在.class的目录

Reference
http://docs.oracle.com/javase/1.4.2/docs/guide/rmi/getstart.doc.html

转载于:https://my.oschina.net/l1z2g9/blog/63311