RMIC找不到类，尽管它就在那里

Question

我正在尝试测试java的RMI，但我无法使rmic命令工作。

​

​

请告诉我您是否需要我的代码，尽管我非常确定这无关紧要，但我已经正确地实现了RMI函数。

服务器端代码：

  public static void main(String[] args)
    {
        try {
            Registry r = LocateRegistry.getRegistry();
            r.bind("RService", new RSimpl());
        }
        catch (Exception ex) {
            ex.printStackTrace();
            System.out.println("Cannot Start Remote Service");
        }
        System.out.println("Remote Service Is Running");
    }   

客户端代码：

@SuppressWarnings("deprecation")
    public Object[] getServiceList()
    {
        boolean connectionsuccess = false;
        Object[] objList = null;
        try {
            System.setSecurityManager(new RMISecurityManager());
            server = (RemoteService) Naming.lookup("rmi://192.168.1.77/RService");
            connectionsuccess = true;
        }
        catch(Exception ex) {
            Object[] options = {"Retry","Cancel"};
            int o = JOptionPane.showOptionDialog(frame, "Cannot Establish Connection To The Server. \n Do You Want To Retry?", "Connection Error", JOptionPane.YES_NO_OPTION, JOptionPane.ERROR_MESSAGE, null, options, options[0]);
            if(o==0)
            {
                i=0;
                attemptConnect();
            }
            else
            {
                i=1;
                return error;
            }
        }
    }

RSimpl.java：

    package testrmi;

import java.rmi.*;
import java.rmi.registry.LocateRegistry;
import java.rmi.registry.Registry;
import java.rmi.server.*;
import java.util.*;

public class RSimpl extends UnicastRemoteObject implements RemoteService {

    HashMap map;

    public RSimpl() throws RemoteException
    {
        setUpServices();
    }

    public void setUpServices()
    {
        map = new HashMap();
        map.put("Dice Roll Service", new DiceRoll());
        map.put("Calculator Service", new Calculator());
        // Keep Adding Services On The Go!
    }

    public Object[] getServiceList()
    {
        return map.keySet().toArray();
    }

    public Service getService(Object SvcKey)
    {
        Service theService = (Service) map.get(SvcKey);
        return theService;
    }

    public static void main(String[] args)
    {
        try {
            Registry r = LocateRegistry.getRegistry();
            r.bind("RService", new RSimpl());
        }
        catch (Exception ex) {
            ex.printStackTrace();
            System.out.println("Cannot Start Remote Service");
        }
        System.out.println("Remote Service Is Running");
    }   
}

RemoteService.java (接口)：

package testrmi;

import java.rmi.*;

public interface RemoteService extends Remote {

    public Object[] getServiceList() throws RemoteException;
    public Service getService(Object SvcKey) throws RemoteException;

}

Answer 1

名为testrmi.RSImpl的类的类文件必须位于相对于testrmi/RSImpl.class中指定的目录之一的CLASSPATH中。

Answer 2

似乎在这种情况下找不到文件。尝试在cmd中键入dir以查看您的文件夹是否在那里。您还可以导航到testrmi文件夹并输入rmic RSimpl。

如果仍然不起作用，请尝试将所需的文件复制到桌面上的文件夹中，然后导航到该文件夹并进行测试。

Answer 3

很抱歉我问了这么愚蠢的问题。我没有按照oracle上的RMIC文档中的定义添加类路径。对于面临此问题的其他任何人，请打开系统环境变量并添加这两个path变量：

• .;
• C:\user\myproject\myCustomCompiledClasses

您必须添加DOT path变量以及已编译类的路径