eboardserver.java

远程网络画板,用JAVA RMI实现,远程的多个用户可以同时在同一画板上绘画

package whiteboard;
import java.rmi.*;
import java.lang.*;

import javax.swing.*;
import java.awt.*;
import javax.swing.table.*;
import java.awt.event.*;




//import java.rmi.server.UnicastRemoteObject;
public class eboardServer extends JFrame
{
    
    eboardServant board1;
    
    static MyDefaultTableModel model;
static MyDefaultTableModel addmodel;


	public eboardServer(String hostname)
	{
        super("Management console");
 model = new MyDefaultTableModel();
 model.setFlag(0);
 addmodel = new MyDefaultTableModel();
addmodel.setFlag(1);
        JTable table = new JTable(model);
        JTable addtable = new JTable(addmodel);
model.addColumn("ID");
addmodel.addColumn("ID");
model.addColumn("name");
addmodel.addColumn("name");

    model.addColumn("delete client");
    addmodel.addColumn("add client");
 
     
        table.setPreferredScrollableViewportSize(new Dimension(500, 70));
	JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS));
        //Create the scroll pane and add the table to it.
        JScrollPane scrollPane = new JScrollPane(table);
        JScrollPane addscrollPane = new JScrollPane(addtable);
	panel.add(scrollPane);
	panel.add(addscrollPane);
        //Add the scroll pane to this window.
        getContentPane().add(panel);
        //getContentPane().add(scrollPane, BorderLayout.WEST);

        System.setSecurityManager(new RMISecurityManager());
        System.out.println("Main OK");
        try{
            board1 = new eboardServant();
            System.out.println("After create");
			Naming.rebind("rmi://"+hostname+"/WhiteBoard", board1);
            System.out.println("eboard server ready");
        }catch(Exception e) {
            System.out.println("eboard server main " + e.getMessage());
        }
        
        
        
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
				board1.notifyallwarning("Server has left");
				System.out.println("Exit");
               System.exit(0);
            }
        });
    }


	public void maxReached()
	{

		JDialog dialog = new JDialog(this, "Warning ");

		//Add contents to it.
		JLabel label = new JLabel("Max number of client is connected.Can not add more");
		label.setHorizontalAlignment(JLabel.CENTER);
		Container contentPane = dialog.getContentPane();
		contentPane.add(label, BorderLayout.CENTER);

		//Show it.
		dialog.setSize(new Dimension(400, 150));
		dialog.setLocationRelativeTo(this);
		dialog.setVisible(true);

	}


class MyDefaultTableModel extends DefaultTableModel {
// flag = 0 => delete
// flag = 1 => add
	int flag;

public void setFlag(int flag) {
	this.flag =flag;

}
public Class getColumnClass(int c) {
            return getValueAt(0, c).getClass();
        }

	public boolean isCellEditable(int row, int col)
	{
		
		if (col <  2)
		{
			return false;
		}
		else
		{
			return true;
		}
	}





 public void setValueAt(Object value, int row, int col) {
   //     int id =   ((Integer) addmodel.getValueAt( row,0)).intValue();

   //    String name = (String) addmodel.getValueAt(row,1);
	//this.removeRow(row);
      
	 
         
	if( this.flag == 1) {


		if (model.getRowCount() > 5)
		{
			maxReached();
	
			return;
		}

           int id =   ((Integer) addmodel.getValueAt( row,0)).intValue();

       String name = (String) addmodel.getValueAt(row,1);
	model.addRow(new Object[]{id,name, new Boolean(false)});
       for(int i=0;i<board1.customerList.size();i++)
    	{
    		if(((parcel)(board1.customerList.elementAt(i))).tag==id) { 
                    System.out.println("index="+i+"id"+id);
                    System.out.println("status =" + ((parcel) (board1.customerList.elementAt(i))).connectStatus);
        ((parcel) (board1.customerList.elementAt(i))).setConnectStatus(true);
         System.out.println("status =" + ((parcel) (board1.customerList.elementAt(i))).connectStatus);
                    
                  try
        {
            board1.notifyit(i);
            board1.notifyitwarning(i,"You have been connected");
                  }
        catch (Exception e){
            ;
        }
        
                this.removeRow(row);
                    
                    
                    
                    
                }
                
                
                
       }
        
     
 	}  
        
        
        
        if( this.flag == 0) {
			
            if(row !=0) {
      int id =   ((Integer) model.getValueAt( row,0)).intValue();

       String name = (String) model.getValueAt(row,1);
            
            
	addmodel.addRow(new Object[]{id,name, new Boolean(false)});
        
        
        
        for(int i=0;i<board1.customerList.size();i++)
    	{
    		if(((parcel)(board1.customerList.elementAt(i))).tag==id) { 
        ((parcel) (board1.customerList.elementAt(i))).setConnectStatus(false);
             this.removeRow(row);
             
                }
        }
        
            }
        
 	}  
        
   
        
        
        
 }
}

    
    
    
    
	public static void main(String args[])
	{
        /*    
       System.setSecurityManager(new RMISecurityManager());
        System.out.println("Main OK");
        try{
            eboard board1 = new eboardServant();
            System.out.println("After create");
			Naming.rebind("rmi://"+args[0]+"/WhiteBoard", board1);
            System.out.println("eboard server ready");
        }catch(Exception e) {
            System.out.println("eboard server main " + e.getMessage());
        }
        */
         eboardServer serverframe = new eboardServer(args[0]);
        serverframe.pack();
        serverframe.setVisible(true);
        WhiteboardFrame newPad=new WhiteboardFrame(args[0],"SERVER");
        
    }
}