本文主要介绍Java中的rmi的基本使用
1：项目架构
api：主要是接口的定义，url地址，端口号
rmiconsumer：rmi服务的调用者
rmiserver：rmi服务的提供者
2：pom.xnl
api的pom.xml
<artifactId>api</artifactId> <groupId>com.api</groupId> <version>1.0</version> rmiconsumer和rmiserver的pom.xml <dependency> <groupId>com.api</groupId> <artifactId>api</artifactId> <version>1.0</version> <https://img.qb5200.com/download-x/dependency>
该功能主要是将api的引入到服务端和客户端
3：代码
api的代码
public interface RMIInterface extends Remote {
String RMI_URL = "rmi://127.0.0.1:9080/RMIServer";
int PORT = 9080;
Object sayHello(String name) throws RemoteException;
}
rmiserver的代码
public class RMIInterfaceImpl extends UnicastRemoteObject implements RMIInterface {
public RMIInterfaceImpl() throws RemoteException {
}
@Override
public Object sayHello(String name) throws RemoteException {
return "你好，你连接成功，姓名："+name;
}
}
public class RMIServer {
public static void main(String[] args) {
try {
RMIInterface rmi = new RMIInterfaceImpl();
//注册通讯端口
LocateRegistry.createRegistry(RMIInterface.PORT);
//注册通讯路径
Naming.bind(RMIInterface.RMI_URL,rmi);
System.out.println("rmi服务端启动成功");
}catch (Exception e){
e.printStackTrace();
}
}
}
rmiconsumer
public class RMIConsumer {
public static void main(String[] args) {
//远程调用RMI
RMIInterface rmiInterface =null;
try{
rmiInterface =(RMIInterface) Naming.lookup(RMIInterface.RMI_URL);
Object ret = rmiInterface.sayHello("张先生");
System.out.println("测试远程调用成功，返回结果："+ret);
}catch (Exception e){
e.printStackTrace();
}
}
}
4:总结
接口必须继承 Remote
接口的实现类必须继承 UnicastRemoteObject
