chatserver.java

rmi的例子和制作的录像

package rmichat;
import java.rmi.*;
import java.rmi.server.*;
import java.util.HashMap;

public class ChatServer extends UnicastRemoteObject implements Chat {
    private HashMap userList = new HashMap();
    private StringBuffer msg = new StringBuffer();
    /*构造方法是一定要的*/
    public ChatServer() throws RemoteException {

    }

    /**
     * getMsg
     *
     * @return String
     * @todo Implement this rmichat.Chat method
     */
    public String getMsg()throws RemoteException {
        System.out.println("getMsg()");
        return msg.toString();
    }

    /**
     * login
     *
     * @param name String
     * @return boolean
     * @todo Implement this rmichat.Chat method
     */
    public boolean login(String name)throws RemoteException {
        System.out.println("login()");
        if(userList.get(name)==null){
            return true;
        }
        return false;
    }

    /**
     * logout
     *
     * @todo Implement this rmichat.Chat method
     */
    public void logout(String name)throws RemoteException {
        System.out.println("logout()");
        msg.append("--->["+name+"] 退出聊天室\n");

    }

    /**
     * sendMsg
     *
     * @param msg String
     * @todo Implement this rmichat.Chat method
     */
    public void sendMsg(String msg)throws RemoteException {
        System.out.println("sendMsg()");
        this.msg.append("->"+msg+"\n");
    }

    public static void main(String[] args) throws Exception {
        System.setSecurityManager(new RMISecurityManager());
        Chat instance = new ChatServer();
        Naming.rebind("rmi://localhost/Chat", instance);
        System.out.println("Server has been bound!");
    }
}