网络画图板(一)

 

网络画图板;客户端在向服务器发送信息的时候需要定义发送的协议, 简称通信协议

 

形状类型   int type;  0直线   1矩形   2椭圆

形状数据  int x1,y1,x2,y2;

 

服务器;只需要不停的接受客户端,转发给另外的客户端

客户端;需要有界面,通信协议,

 

服务器

 

 客户端一上面画

 

客户端二上面也会有

 

 

 

服务器:

package 远程演示服务器;

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;

/**
 * 服务器的主类
 * 
 * @author Administrator
 * 
 */
public class ServerMain {
	// static不能定义在main方法里面
	public static ArrayList<Socket> socketlis = new ArrayList<Socket>();

	public static void main(String[] args) {
		boolean islive = true;
		try {
			ServerSocket server = new ServerSocket(9090);
			System.out.println("等待连接客户端...");

			while (islive) {
				Socket socket = server.accept();
				ServerThread th = new ServerThread(socket);
				th.start();
				socketlis.add(socket);
				System.out.println(socket.getInetAddress().getHostName()
						+ "连上服务器");

			}
		} catch (IOException e) {
			islive = false;
			System.out.println("端口不存在,,");

		}
	}
}

 

服务器线程来转发数据

package 远程演示服务器;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;

/**
 * 使用线程将绘制的内容发给其他的客户端
 * 
 * @author Administrator
 * 
 */
public class ServerThread extends Thread {

	private Socket socket;

	public ServerThread(Socket socket) {
		this.socket = socket;
	}

	@Override
	public void run() {
		try {
			//获取输入流
			InputStream is = socket.getInputStream();
			DataInputStream dis = new DataInputStream(is);
			while (true) {
				int type = dis.readInt();
				int x1 = dis.readInt();
				int y1 = dis.readInt();
				int x2 = dis.readInt();
				int y2 = dis.readInt();

				// 转发给其它客户端

				for (int i = 0; i < ServerMain.socketlis.size(); i++) {
					Socket sc = ServerMain.socketlis.get(i);
					if (sc != socket) {
						OutputStream os = sc.getOutputStream();
						DataOutputStream dos = new DataOutputStream(os);

						dos.writeInt(type);
						dos.writeInt(x1);
						dos.writeInt(y1);
						dos.writeInt(x2);
						dos.writeInt(y2);
						dos.flush();

					}
				}

			}
		} catch (Exception e) {
			e.printStackTrace();
		}

	}

}

 

 

 

 

 

客户端主界面

package 远程演示客户端;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.Socket;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

/**
 * 远程演示客户端
 * 
 * @author Administrator
 * 
 */
public class DrawUI extends JFrame {
	public static void main(String[] args) {
		new DrawUI();
	}

	private JTextField ipFiled;
	private JTextField portFiled;
	private JButton Btn;
	private JPanel centenr;
	private Socket socket;

	public DrawUI() {
		this.setTitle("远程演示");
		this.setSize(500, 500);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setLayout(new BorderLayout());

		// 绘制区域
		centenr = new JPanel();
		this.add(centenr,BorderLayout.CENTER);
		// 右边聊天区域
		JPanel right = new JPanel();
		right.setPreferredSize(new Dimension(100, 100));
		right.setBackground(Color.lightGray);
		this.add(right, BorderLayout.EAST);
		// 下边ip设置
		JPanel bottom = new JPanel();
		bottom.setPreferredSize(new Dimension(500, 50));
		bottom.setBackground(Color.lightGray);
		this.add(bottom, BorderLayout.SOUTH);

		// 设置默认的ip和端口
		JLabel iplabel = new JLabel("IP");
		ipFiled = new JTextField("127.0.0.1", 15);
		JLabel portlabel = new JLabel("port");
		portFiled = new JTextField("9090", 10);

		Btn = new JButton("连接服务器");

		// 创建监听器对象
		BtnLisetenr blis = new BtnLisetenr();
		Btn.addActionListener(blis);
		// 将组件添加到窗体下部
		bottom.add(iplabel);
		bottom.add(ipFiled);
		bottom.add(portlabel);
		bottom.add(portFiled);
		bottom.add(Btn);
  
		this.setResizable(false);
		this.setVisible(true);

		//创建监听器对象
		ClientLis lis = new ClientLis(this, centenr);
		centenr.addMouseListener(lis);

	}

	// 获得客户端

	public Socket getSocket() {
		return socket;
	}

	// 添加链接服务器的监听器
	class BtnLisetenr implements ActionListener {

		

		@Override
		public void actionPerformed(ActionEvent e) {
			String str = e.getActionCommand();
			if (str.equals("连接服务器")) {
				// 获得输入框中的ip和端口
				String ip = ipFiled.getText().trim();
				String ports = portFiled.getText().trim();
				// 在客户端的创建中端口是整型的,所以需要将端口字符串转换成整形
				int port = Integer.parseInt(ports);
				try {
					socket = new Socket(ip, port);
					//启动接收消息的线程
					receiveThread th = new receiveThread(socket, centenr);
					th.start();

					Btn.setText("已经连接上服务器..");
				} catch (Exception e1) {
					e1.printStackTrace();
				}
			}
		}
	}

}

 

客户端监听器类

package 远程演示客户端;

/*
 * 监听器类
 */
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;

import javax.swing.JPanel;

public class ClientLis extends MouseAdapter {

	private int x1, y1, x2, y2;
	private JPanel centenr;
	private DrawUI ui;
	Graphics g;

	public ClientLis(DrawUI ui, JPanel centenr) {
		this.ui = ui;
		this.centenr = centenr;
	}

	// 按下
	public void mousePressed(MouseEvent e) {
		// 获得画布和按下的坐标
		g = centenr.getGraphics();
		x1 = e.getX();
		y1 = e.getY();

	}

	// 释放
	public void mouseReleased(MouseEvent e) {

		// 获得释放时的坐标
		x2 = e.getX();
		y2 = e.getY();

		g.drawLine(x1, y1, x2, y2);
		Send();

	}

	// 将绘制的消息发送给服务器
	public void Send() {
		// 获得socket
		Socket socket = ui.getSocket();
		if (socket != null) {
			try {
				OutputStream os = socket.getOutputStream();
				DataOutputStream oos = new DataOutputStream(os);
				oos.writeInt(0);
				oos.writeInt(x1);
				oos.writeInt(y1);
				oos.writeInt(x2);
				oos.writeInt(y2);
				oos.flush();

			} catch (IOException e) {
				e.printStackTrace();
			}

		} else {
			javax.swing.JOptionPane.showMessageDialog(null, "网络不通!!!");
		}

	}

}

 

客户端线程类,定义通信协议

package 远程演示客户端;

import java.awt.Graphics;
import java.io.DataInputStream;
import java.io.InputStream;
import java.net.Socket;

import javax.swing.JPanel;

/**
 * 处理客户端接受服务器的消息
 * 
 * @author Administrator
 * 
 */
public class receiveThread extends Thread {

	private JPanel centenr;
	private Socket socket;
	boolean islive = true;
	private DataInputStream dis;
	private Graphics g;

	public receiveThread(Socket socket, JPanel centenr) {
		this.socket = socket;
		this.centenr = centenr;

		try {
			// 创建输入流
			InputStream is = socket.getInputStream();
			dis = new DataInputStream(is);
		} catch (Exception e) {
			e.printStackTrace();
		}

	}

	@Override
	public void run() {
		while (islive) {
			try {
				int type = dis.readInt();
				int x1 = dis.readInt();
				int y1 = dis.readInt();
				int x2 = dis.readInt();
				int y2 = dis.readInt();
				g = centenr.getGraphics();
				if (type == 0) {
					g.drawLine(x1, y1, x2, y2);
				}

			} catch (Exception ef) {
				islive = false;
				ef.printStackTrace();
			}

		}

	}
}

 

 

 

 

评论

1 楼 qindongliang1922 2014-09-09  

图像看着很给力，写的比较用心，赞一个，java swing这种技术，楼主还在研究吗，公司有用吧