基于图形界面编程，实现简单的网络对话

基于图形界面编程，实现简单的网络对话

一、具体要求
图形界面编程，利用socket和UDP/TCP编写，客户端和服务端程序可以进行多次对话。

二、源代码
1.ServerDemo.java

package myInternet_3;

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JTextField;
import javax.swing.JLabel;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.awt.event.ActionEvent;
import javax.swing.JTextArea;
import java.awt.Color;
import javax.swing.JScrollPane;

public class ServerDemo extends JFrame {

	private JPanel contentPane;
	public JTextArea textField ;
	private JScrollPane scrollPane ;
	public JTextField textField_1;
	public JButton button = new JButton("发   送");
	private boolean flag=false;
	/**
	 * Launch the application.
	 */
	/*public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					ServerDemo frame = new ServerDemo();
					frame.setVisible(true);
					ServerSocket server=null;
					 try{ 
						 server=new ServerSocket(4444); 
					 }catch(Exception e) {
						 System.out.println("can not listen to:"+e); 
					 }
					 Socket socket=null;
					 try{
						 socket=server.accept(); 
					 }catch(Exception e) {
						 System.out.println("Error."+e); 
					 }
					 String line;
					 BufferedReader is=new BufferedReader(new
					 InputStreamReader(socket.getInputStream()));
					 PrintWriter os=new PrintWriter(socket.getOutputStream());
					 BufferedReader sin=new BufferedReader(new InputStreamReader(System.in));
					 System.out.println("Client:"+is.readLine()); 
					 line=sin.readLine();
					 while(!line.equals("bye")){ 
						 os.println(line); 
						 os.flush(); 
						 System.out.println("Server:"+line); 
						 System.out.println("Client:"+is.readLine());
						 line=sin.readLine(); 
					 } //继续循环
					 os.close(); //关闭Socket输出流
					 is.close(); //关闭Socket输入流
					 socket.close(); //关闭Socket
					 server.close(); //关闭ServerSocket
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}
	*/
	/**
	 * Create the frame.
	 */
	public ServerDemo() {
		setTitle("ServerDemo");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 450, 300);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		contentPane.setLayout(null);
		
		JLabel label_1 = new JLabel("对话内容：");
		label_1.setBounds(30, 10, 80, 15);
		contentPane.add(label_1);
		
		/*JScrollPane scrollPane = new JScrollPane();
		scrollPane.setBounds(30, 172, 376, -130);
		contentPane.add(scrollPane);
		*/
		
		scrollPane = new JScrollPane();
		scrollPane.setBounds(30, 37, 376, 144);
        contentPane.add(scrollPane);
        
        textField = new JTextArea();
		textField.setBounds(30, 37, 376, 144);
		textField.setEditable(false);
		scrollPane.setViewportView(textField);
		//contentPane.add(textField);
		
		JLabel label = new JLabel("请输入您要发送的消息：");
		label.setBounds(30, 191, 146, 15);
		contentPane.add(label);
		
		textField_1 = new JTextField();
		textField_1.setBounds(172, 188, 221, 21);
		contentPane.add(textField_1);
		textField_1.setColumns(10);
		/*
		//更新消息框
		ServerSocket serverSocket=null;
		Socket clientSocket=null;
		String str=null;
		try {
			serverSocket=new ServerSocket(5555);
			clientSocket=serverSocket.accept();
			DataInputStream in=new DataInputStream(clientSocket.getInputStream());
			//DataOutputStream out=new DataOutputStream(clientSocket.getOutputStream());
			str=in.readUTF();
			textField.setText(textField.getText()+"\n"+"(对方)"+str);
			//str=textField_1.getText();
			//out.writeUTF(str);
			//textField.setText(textField.getText()+"\n"+"(自己)"+str);
		}catch (Exception exception) {
			System.out.println(exception.getMessage());
		}
		*/
		
		
		/*button.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {	
				flag=true;
			}
		});*/
		button.setBounds(66, 228, 93, 23);
		contentPane.add(button);
		
		JButton btnNewButton = new JButton("清   除");
		btnNewButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				textField_1.setText("");
			}
		});
		btnNewButton.setBounds(242, 228, 93, 23);
		contentPane.add(btnNewButton);
	}
	public JTextArea get() {
		return this.textField;
	}
	public JTextField get_1() {
		return this.textField_1;
	}
	public boolean getFlag() {
		return this.flag;
	}
	public void revise() {
		this.flag=false;
	}
}

2.Server.java

package myInternet_3;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Date;
import java.text.SimpleDateFormat;

public class Server extends Thread{
	
	private ServerDemo serverFrame;
	
	public void run() {
		ServerSocket serverSocket=null;
		Socket clientSocket=null;
		String str=null;
		serverFrame = new ServerDemo();
		serverFrame.setVisible(true);
		try {
			serverSocket=new ServerSocket(60002);
			clientSocket=serverSocket.accept();
			serverFrame.textField.setText("有客户连接成功！"+"\r\n");
			
			DataInputStream in=new DataInputStream(clientSocket.getInputStream());
			DataOutputStream out=new DataOutputStream(clientSocket.getOutputStream());
			out.writeUTF("连接成功！");
			serverFrame.button.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {	
					if(serverFrame.textField_1.getText().equals("")==false) {
						if(serverFrame.textField.getText()!=null) {
							SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH：mm：ss");		
							Date date = new Date();		
							String s = simpleDateFormat.format(date);
							serverFrame.textField.setText(serverFrame.textField.getText()+"服务端："+s+"\r\n"+"      "+serverFrame.textField_1.getText()+"\r\n");
						}	
						else {
							SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH：mm：ss");		
							Date date = new Date();		
							String s = simpleDateFormat.format(date);
							serverFrame.textField.setText("服务端："+s+"\r\n"+"      "+serverFrame.textField_1.getText()+"\r\n");
						}
						try{
							out.writeUTF(serverFrame.textField_1.getText());
						}catch (Exception exception) {
							System.out.println(exception.getMessage());
						}
						serverFrame.textField_1.setText("");
					}
				}
			});
			while(true) {
				str=in.readUTF();
				if(str.equals("")==false) {
					if(serverFrame.textField.getText()!=null) {
						SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH：mm：ss");		
						Date date = new Date();		
						String s = simpleDateFormat.format(date);
						serverFrame.textField.setText(serverFrame.textField.getText()+"客户端："+s+"\r\n"+"      "+str+"\r\n");
					}	
					else {
						SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH：mm：ss");		
						Date date = new Date();		
						String s = simpleDateFormat.format(date);
						serverFrame.textField.setText("客户端："+s+"\r\n"+"      "+str);
					}
						
				}
				
				//out.writeUTF(serverFrame.textField_1.getText());
				
			}
			
			
			//in.close();
			//out.close();
			//clientSocket.close();
			//serverSocket.close();
		}catch (Exception exception) {
			System.out.println(exception.getMessage());
		}
	}
	public static void main(String[] args) {
		Server server=new Server();
		server.start();
		
	}
		
}
	

3.ClientDemo.java

package myInternet_3;

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.border.EmptyBorder;
import javax.swing.JLabel;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.awt.event.ActionEvent;
import javax.swing.JTextArea;

public class ClientDemo extends JFrame {

	private JPanel contentPane;
	public JTextArea textField ;
	private JScrollPane scrollPane ;
	public JTextField textField_1;
	public JButton button = new JButton("发   送");
	private boolean flag=false;
	/**
	 * Launch the application.
	 */
	/*public static void main(String[] args) {
		EventQueue.invokeLater(new Runnable() {
			public void run() {
				try {
					ClientDemo frame = new ClientDemo();
					frame.setVisible(true);
					Socket socket=new Socket("127.0.0.1", 4444); 
					BufferedReader sin=new BufferedReader(new InputStreamReader(System.in));
					PrintWriter os=new PrintWriter(socket.getOutputStream());
					BufferedReader is=new BufferedReader(new InputStreamReader(socket.getInputStream()));
					String readline;
					readline=sin.readLine(); 
					while(!readline.equals("bye")){ 
					os.println(readline); 
					os.flush(); 
					System.out.println("Client:"+readline); 
					System.out.println("Server:"+is.readLine()); 
					readline=sin.readLine(); 
					} //继续循环
					os.close(); //关闭Socket输出流
					is.close(); //关闭Socket输入流
					socket.close(); //关闭Socket
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		});
	}*/

	/**
	 * Create the frame.
	 */
	public ClientDemo() {
		setTitle("ClientDemo");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 450, 300);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		contentPane.setLayout(null);
		
		JLabel label = new JLabel("对话内容：");
		label.setBounds(26, 10, 69, 15);
		contentPane.add(label);
		
		scrollPane = new JScrollPane();
		scrollPane.setBounds(26, 30, 379, 142);
        contentPane.add(scrollPane);
		
        textField = new JTextArea();
		textField.setBounds(26, 30, 379, 142);
		scrollPane.setViewportView(textField);
		//contentPane.add(textField);
		
		JLabel label_1 = new JLabel("请输入你要发送的消息：");
		label_1.setBounds(26, 192, 149, 21);
		contentPane.add(label_1);
		
		textField_1 = new JTextField();
		textField_1.setBounds(185, 192, 193, 21);
		contentPane.add(textField_1);
		textField_1.setColumns(10);
		
		
		button.setBounds(65, 223, 93, 23);
		contentPane.add(button);
		
		JButton button_1 = new JButton("清   除");
		button_1.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				textField_1.setText("");
			}
		});
		button_1.setBounds(230, 223, 93, 23);
		contentPane.add(button_1);
	}
	public JTextArea get() {
		return this.textField;
	}
	public JTextField get_1() {
		return this.textField_1;
	}
	public boolean getFlag() {
		return this.flag;
	}
	public void revise() {
		this.flag=false;
	}
}

4.Client.java

package myInternet_3;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.text.SimpleDateFormat;
import java.util.Date;

public class Client extends Thread{
	
	private ClientDemo clientFrame;
	
	public void run() {
		Socket client=null;
		String fromServer=null;
		clientFrame=new ClientDemo();
		clientFrame.setVisible(true);
		try {
			
			client=new Socket("127.0.0.1",60002);
			DataOutputStream out=new DataOutputStream(client.getOutputStream());
			DataInputStream in=new DataInputStream(client.getInputStream());
			clientFrame.button.addActionListener(new ActionListener() {
				public void actionPerformed(ActionEvent e) {
					if(clientFrame.textField_1.getText().equals("")==false) {
						if(clientFrame.textField.getText()!=null) {
							SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH：mm：ss");		
							Date date = new Date();		
							String s = simpleDateFormat.format(date);
							clientFrame.textField.setText(clientFrame.textField.getText()+"客户端："+s+"\r\n"+"      "+clientFrame.textField_1.getText()+"\r\n");
						}
						else {
							SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH：mm：ss");		
							Date date = new Date();		
							String s = simpleDateFormat.format(date);
							clientFrame.textField.setText("客户端："+s+"\r\n"+"      "+clientFrame.textField_1.getText()+"\r\n");
						}
						try{
							out.writeUTF(clientFrame.textField_1.getText());
						}catch (Exception exception) {
							System.out.println(exception.getMessage());
						}
						clientFrame.textField_1.setText("");
					}	
				}
			});
			while(true) {
				fromServer=in.readUTF();
				if(fromServer.equals("")==false) 
				{
					if(fromServer.equals("连接成功！")==true) 
						clientFrame.textField.setText("连接成功！"+"\r\n");
					else {
						SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH：mm：ss");		
						Date date = new Date();		
						String s = simpleDateFormat.format(date);
						clientFrame.textField.setText(clientFrame.textField.getText()+"服务端："+s+"\r\n"+"      "+fromServer+"\r\n");
					}
						
				}
					

						
					
				
					
					
				
	
				
			}
			//out.close();
			//in.close();
			//client.close();
		}catch(Exception exception) {
			System.out.println(exception.getMessage());
		}
			

	}
	public static void main(String[] args) {
		Client client=new Client();
		client.start();
		
	}
}

三、体会
网络编程这一块本身是较为简单的，但是需要结合多线程和界面设计时会变得比较麻烦，因此，在编程前应当想清楚类的关系，线程的数量及关系；另外，网络编程应用十分广阔，应该要学得扎实。

四、说明
刚开始写这个代码的时候，线程之间的关系没有考虑清楚（即注释部分里面的），后来/…/内的没有删除。