Java Rmi 远程方法调用

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

/**
* 1.定义远程接口，必须继承Remote接口，
* 2.远程调用的方法必须抛出RemoteException异常
*/
public interface ISayHello extends Remote {

/**
* @param name
* @return
* @throws RemoteException  远程调用方法必须抛出RemoteException
*/
public String doSayHello(String name) throws RemoteException;
}

import java.rmi.RemoteException;
import com.xx.service.ISayHello;

/**
* 远程接口实现
*/
public class ChinaSayHello implements ISayHello {

public String doSayHello(String name) throws RemoteException {
return "您好," + name;
}
}

import java.net.MalformedURLException;
import java.rmi.AlreadyBoundException;
import java.rmi.Naming;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.rmi.registry.LocateRegistry;
import java.rmi.server.UnicastRemoteObject;

import com.xx.service.ISayHello;
import com.xx.service.impl.ChinaSayHello;

/**
*
* 暴露远程服务
*/
public class ServerMain {

public static void main(String[] args) {
//创建远程对象
ISayHello sayHello = new ChinaSayHello();
//url
String serviceUrl = "//localhost:9999/sayhello";
//java 默认对口是1099
final int registryPort = 9999;
//暴露服务
exporter(sayHello, registryPort, serviceUrl);
}

/**
* 暴露服务
* @param object
* @param registryPort
* @param serviceUrl
*/
public static void exporter(Remote object,int registryPort, String serviceUrl) {
int servicePort = 0;
try {
UnicastRemoteObject.exportObject(object, servicePort);
LocateRegistry.createRegistry(registryPort);
Naming.bind(serviceUrl, object);
System.out.println("绑定成功.");
} catch (RemoteException e) {
e.printStackTrace();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (AlreadyBoundException e) {
e.printStackTrace();
}
}
}

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

import com.xx.service.ISayHello;

/**
* 客户端
*/
public class ClientMain {

public static void main(String[] args) throws RemoteException {
// 查找远程对象
ISayHello sayHello= getObject(ISayHello.class, "rmi://localhost:9999/sayhello");
// 远程方法调用
System.out.println(sayHello.doSayHello("张三"));
}

public static <T> T getObject(Class<T> clazs, String serviceUrl) {
try {
Object object = Naming.lookup(serviceUrl);
return clazs.cast(object);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (RemoteException e) {
e.printStackTrace();
} catch (NotBoundException e) {
e.printStackTrace();
}
throw new RuntimeException();
}
}