[英]Port already in use exception with java RMI using CMD
使用 java 和 CMD 運行 RMI。 顯示 java.rmi.server.ExportException。 例外是,端口已在使用中。
服務器接口
import java.rmi.*;
public interface AdditionInterface extends Remote {
public int add(int a, int b) throws RemoteException;
}
接口實現
import java.rmi.Naming;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
public class AdditionClient {
public static void main(String[] args) {
try {
String host="";
Registry registry = LocateRegistry.getRegistry(host);
AdditionInterface hello = (AdditionInterface) registry.lookup("Addition");
int result = hello.add(9, 2);
System.out.println("Result is: " + result);
} catch (Exception ex) {
System.out.println("HelloClient Exception" + ex);
}
}
}
服務器注冊表 class
package chapter40;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
public class AdditionServer {
public static void main(String[] args) {
try {
Registry registry = LocateRegistry.getRegistry();
AdditionInterface obj = new Addition();
registry.rebind("Addition", obj);
System.out.println("Addition Server is ready");
} catch (Exception ex) {
System.out.println("Addition Server failed" + ex);
}
}
}
客戶端程序
import java.rmi.Naming;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
public class AdditionClient {
public static void main(String[] args) {
try {
String host="";
Registry registry = LocateRegistry.getRegistry(host);
AdditionInterface hello = (AdditionInterface) registry.lookup("Addition");
int result = hello.add(9, 2);
System.out.println("Result is: " + result);
} catch (Exception ex) {
System.out.println("HelloClient Exception" + ex);
}
}
}
為了清楚起見,我在兩個不同的項目中將服務器與客戶端類分開
我搜索了各種線程,最后讓它以不同於[但也是我所看到的組合]的方式工作
運行服務器程序(從命令提示符):
將目錄更改為服務器的源文件夾cd c:\Users\Heavenly\workspace\RMIServerSide\src
編譯類javac chapter40/*.java
啟動 RMI 注冊表start rmiregistry
啟動包含 main() 方法的注冊表服務器 class。 注意代碼行略有不同
start java -cp. chapter40.AdditionServer
start java -cp. chapter40.AdditionServer
(服務器已經設置好了)
運行客戶端程序
將目錄更改為源文件夾cd c:\Users\Heavenly\workspace\RMIClientSide\src
編譯所有類javac chapter40/*.java
3.運行客戶端程序java chapter40.AdditionClient
(現在一切都在運行)
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