Question

我是java RMI的新手，我正在按照教程了解它。它使用服务器，代码列表如下所示，以获取服务器

CalculatorServer.java

 public class CalculatorServer {
        public CalculatorServer(){
            try {
                Calculator c = new CalculatorImpl();
                Naming.rebind("rmi://localhost:1099/CalculatorService", c);
            } catch (Exception e) {
                System.out.println("Trouble"+e);
            }
        }
        public static void main(String args[]){
            new CalculatorServer();
        }
    }

CalculatorImpl.java

 public class CalculatorImpl extends UnicastRemoteObject implements Calculator {

    //constructor
    public CalculatorImpl() throws RemoteException {
        super();
    }

    //@Override
    public long add(long a, long b) throws RemoteException {
        return a + b;
    }

    //@Override
    public long sub(long a, long b) throws RemoteException {
        return a - b;
    }

    //@Override
    public long mul(long a, long b) throws RemoteException {
        return a * b;
    }

   // @Override
    public long div(long a, long b) throws RemoteException {
        return a / b;
    }
}

3.Calculator.java

  public interface Calculator extends Remote{
    public long add(long a, long b) throws RemoteException;
    public long sub(long a, long b) throws RemoteException;
    public long mul(long a, long b) throws RemoteException;
    public long div(long a, long b) throws RemoteException;
  }

当我调试程序时，这是netbeans ide控制台的错误; 它说这个错误：Troublejava.rmi.ServerException：在服务器线程中发生了RemoteException;嵌套异常是： java.rmi.UnmarshalException：错误解组参数;嵌套异常是： java.lang.ClassNotFoundException：rmi.Calculator

Answer 1

听起来您没有运行RMI注册表，这是一个与您的CalculatorServer程序不同的进程。它位于您的java bin目录中。给它一点时间启动，然后再次尝试你的代码。

连接到Java RMI服务器

1 个答案: