java+socket 简易聊天工具

1、服务器端程序

package com.test3;
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

import javax.swing.*;

public class MyServer3 extends JFrame implements ActionListener{

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new MyServer3();
	}

	JTextArea jta = null;
	JTextField jtf = null;
	JButton sendBtn = null;
	JPanel jp = null;
	JScrollPane jsp = null;
	//把信息发给客户端的对象
	PrintWriter pw = null;

	public MyServer3()
	{
		//
		jta = new JTextArea();
		jtf = new JTextField(20);
		sendBtn = new JButton("send");
		sendBtn.addActionListener(this);
		sendBtn.setActionCommand("send");
		jsp = new JScrollPane(jta);

		jp = new JPanel();
		jp.add(jtf);
		jp.add(sendBtn);

		this.add(jsp,BorderLayout.CENTER);
		this.add(jp,BorderLayout.SOUTH);

		this.setSize(400, 300);
		this.setTitle("QQ简易聊天-服务器端");
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setVisible(true);
		this.setResizable(false);

		try {
			//服务器监听
			ServerSocket ss = new ServerSocket(9988);
			//等待客户端连接
			Socket s = ss.accept();

			BufferedReader br = new BufferedReader
					(new InputStreamReader(s.getInputStream()));

			pw = new PrintWriter(s.getOutputStream(),true);
			//读取从客户端发来的信息
			while(true) {
				String info = br.readLine();
				jta.append("client  "+getTime()+"\r\n"+info+"\r\n");
			}
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if(e.getActionCommand().equals("send")) {
			//把服务器在jtf写的内容发送给客户端
			String info = jtf.getText();
			jta.append("server  "+getTime()+"\r\n"+info+"\r\n");
			pw.println(info);
			//清空发送框内容
			jtf.setText("");
		}
	}

	//获取系统时间
	public String getTime()
	{
		Calendar c = Calendar.getInstance();//可以对每个时间域单独修改
		int hour = c.get(Calendar.HOUR_OF_DAY);
		int minute = c.get(Calendar.MINUTE);
		int second = c.get(Calendar.SECOND);
		return hour+":"+ minute+":"+second;
	}

}

2、客户端程序

package com.test3;
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

import javax.swing.*;

public class MyClient3 extends JFrame implements ActionListener{

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new MyClient3();
	}

	JTextArea jta = null;
	JTextField jtf = null;
	JButton sendBtn = null;
	JPanel jp = null;
	JScrollPane jsp = null;

	PrintWriter pw = null;

	public MyClient3()
	{
		//
		jta = new JTextArea();
		jtf = new JTextField(20);
		sendBtn = new JButton("send");
		sendBtn.addActionListener(this);
		sendBtn.setActionCommand("send");
		jsp = new JScrollPane(jta);

		jp = new JPanel();
		jp.add(jtf);
		jp.add(sendBtn);

		this.add(jsp,BorderLayout.CENTER);
		this.add(jp,BorderLayout.SOUTH);

		this.setSize(400, 300);
		this.setTitle("QQ简易聊天-客户端");
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setVisible(true);
		this.setResizable(false);

		try {
			Socket s = new Socket("127.0.0.1",9988);
			BufferedReader br = new BufferedReader
					(new InputStreamReader(s.getInputStream()));
			pw = new PrintWriter(s.getOutputStream(),true);
			while(true) {
				//不停的读取服务器端发来的信息
				String info = br.readLine();
				jta.append("server  "+getTime()+"\r\n"+info+"\r\n");
			}
		} catch (Exception e) {
			// TODO: handle exception
		}
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		// TODO Auto-generated method stub
		if(e.getActionCommand().equals("send")) {
			String info = jtf.getText();
			//把客户端发送的信息显示到jta
			jta.append("client  "+getTime()+"\r\n"+info+"\r\n");
			pw.println(info);
			jtf.setText("");
		}
	}

	//获取系统时间
	public String getTime()
	{
		Calendar c = Calendar.getInstance();//可以对每个时间域单独修改
		int hour = c.get(Calendar.HOUR_OF_DAY);
		int minute = c.get(Calendar.MINUTE);
		int second = c.get(Calendar.SECOND);
		return hour+":"+ minute+":"+second;
	}

}

3、演示