用Java RMI实现远程对象访问,给出具体操作方法
时间: 2024-09-11 21:02:39 浏览: 40
Java RMI远程方法调用详解
在Java中使用RMI实现远程对象访问涉及以下步骤:
1. **定义远程接口**[^1]:
创建一个`MyRemoteInterface.java`文件,其中包含远程方法的声明:
```java
// MyRemoteInterface.java
public interface MyRemoteInterface {
String echo(String message);
}
```
2. **实现远程接口**:
实现这个接口并添加到服务器端:
```java
// MyServerImpl.java
import java.rmi.Remote;
import java.rmi.RemoteException;
public class MyServerImpl extends UnicastRemoteObject implements MyRemoteInterface {
public MyServerImpl() throws RemoteException {
super();
}
@Override
public String echo(String message) throws RemoteException {
return "Echo from server: " + message;
}
}
```
3. **注册远程对象**:
在服务器启动时,注册远程对象到RMI注册表:
```java
// ServerMain.java
public static void main(String[] args) {
try {
MyServerImpl myService = new MyServerImpl();
Naming.rebind("//localhost/myService", myService);
System.out.println("Server started.");
} catch (Exception e) {
e.printStackTrace();
}
}
```
4. **客户端调用远程方法**:
客户端代码会寻找并调用远程对象的方法:
```java
// ClientMain.java
import java.rmi.Naming;
import java.rmi.RemoteException;
public class ClientMain {
public static void main(String[] args) {
try {
MyRemoteInterface stub = (MyRemoteInterface) Naming.lookup("//localhost/myService");
String response = stub.echo("Hello from client!");
System.out.println("Response from server: " + response);
} catch (Exception e) {
e.printStackTrace();
}
}
}
```
5. **启动客户端**:
运行`ClientMain`以调用远程方法。
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