java简易的局域网聊天工具

main方法

package com.lovo.work;

public class Test {

    

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

}

主程序：文件中是姓名和IP,用键值对的方式写入

package com.lovo.work;

import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.OutputStreamWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Properties;
import java.util.Set;

import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class FeiqiuFrame extends JFrame{
    

    
    private Container contentP;
    private JTextArea msgArea;
    private JTextField IPTxt;
    private JButton qingkongBtn;
    private JTextField wenbenTxt;
    private JButton fasongBtn;
    private String msg;
    private Socket fromClient;
    private String str3;
    private JComboBox classComb;
    private Properties pro;
    private JCheckBox xuanze;

    
        
    

    public FeiqiuFrame() {
        pro=new Properties();
        try {
            pro.load(new FileInputStream("j124.properties"));//
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        this.setSize(400, 350);
        Toolkit tk = Toolkit.getDefaultToolkit();
        int screenW = (int) tk.getScreenSize().getWidth();// 得到屏幕宽
        int screenH = (int) tk.getScreenSize().getHeight();// 得到屏幕高
        this.setLocation((screenW - 400) / 2, (screenH - 510) / 2);
        this.setTitle("我的飞秋");
        // 设置窗体关闭即为关闭程序
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        // 设置窗体内容面板上所有的东西
        this.addContent();
        // 设置窗体可见
        this.setVisible(true);
        
        
        
        ServerSocket server = null;
        try {
            server = new ServerSocket(9527);
            while (true) {
                // accept是阻塞方法，直到监听到客户端发送过来的消息
                Socket fromClient = server.accept();
                new MSGThread(fromClient,this).start();
                
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            if (server != null) {
                try {
                    server.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
        
        
    }

    private void addContent() {
        // TODO Auto-generated method stub
        this.contentP = this.getContentPane();
        // 设置窗体面板的背景色
        this.contentP.setBackground(Color.WHITE);
        // 设置容器的布局管理器为空---空布局管理
        this.contentP.setLayout(null);
        
        this.msgArea = new JTextArea();
        JScrollPane sp = new JScrollPane(this.msgArea);
        sp.setBounds(15, 20, 365, 200);
        msgArea.setEditable(false);
        
//        this.msgArea.setBorder(BorderFactory.createLineBorder(Color.BLACK));
        this.contentP.add(sp);
        
        
        
        this.wenbenTxt = new JTextField();
        this.wenbenTxt.setFont(new Font("微软雅黑", Font.ITALIC,15));
        this.wenbenTxt.setForeground(Color.BLUE);
        this.wenbenTxt.setBounds(15, 230, 110, 25);
        this.contentP.add(this.wenbenTxt);
        
        this.fasongBtn = new JButton();
        this.fasongBtn .setText("发送");
        this.fasongBtn .setFont(new Font("微软雅黑", Font.PLAIN, 15));
        this.fasongBtn .setForeground(Color.BLUE);
        this.fasongBtn .setBounds(130, 230, 65, 25);
        
        
        this.classComb = new JComboBox(this.pro.keySet().toArray());
        this.classComb.setEditable(true);
        this.classComb.setBounds(210, 230,90, 25);
        this.contentP.add(this.classComb);
        

        this.xuanze = new JCheckBox("自动回复");
        this.xuanze.setBackground(new Color(225, 249, 255));
        this.xuanze.setBounds(15, 270, 100, 25);
        this.contentP.add(this.xuanze);
        
        
        this.qingkongBtn = new JButton();
        this.qingkongBtn.setText("清空");
        this.qingkongBtn.setFont(new Font("微软雅黑", Font.PLAIN, 15));
        this.qingkongBtn.setForeground(Color.BLUE);
        this.qingkongBtn.setBounds(310, 230, 65, 25);
        this.contentP.add(this.qingkongBtn);
        this.qingkongBtn.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                msgArea.setText("");
            }
            
        });
        this.fasongBtn.addActionListener(new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                String str=wenbenTxt.getText();
                String ipstr=(String)FeiqiuFrame.this.getClassComb().getSelectedItem();
                String IP=FeiqiuFrame.this.pro.getProperty(ipstr);
                
                String str2 = str.replaceAll(" ", "");
                if(str2!=null&&!str2.equals("")){
                    if(IP.matches("(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]?\\d)(\\.(25[0-5]|2[0-4]\\d|1\\d{2}|[1-9]?\\d)){3}")){
                            msg="XX&"+str2;
                            str3=msgArea.getText();
                            msgArea.setText(str3+"\n"+getFormatDate()+"\n"+"我说："+str2);
                                    
                            Socket client = null;        
                            try {
                                client = new Socket(IP, 9527);
                                BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(client.getOutputStream()));
                                bw.write(msg);
                                bw.flush();
                            } catch (UnknownHostException e1) {
                                // TODO Auto-generated catch block
                                e1.printStackTrace();
                            } catch (IOException e1) {
                                // TODO Auto-generated catch block
                                e1.printStackTrace();
                            } finally{
                                if(client != null){
                                    try {
                                        client.close();
                                    } catch (IOException e1) {
                                        // TODO Auto-generated catch block
                                        e1.printStackTrace();
                                    }
                                }
                            }
                    }else{
                        JOptionPane.showMessageDialog(fasongBtn, "IP输入不正确！");
                    }
                    
                }else{    
                    JOptionPane.showMessageDialog(fasongBtn, "消息输入不能为空！");
                }
            }
        });
        
        this.contentP.add(this.fasongBtn );
        
    }
    public static String getFormatDate()
    {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return sdf.format(Calendar.getInstance().getTime());
    }

    public Container getContentP() {
        return contentP;
    }

    public void setContentP(Container contentP) {
        this.contentP = contentP;
    }

    public JTextArea getMsgArea() {
        return msgArea;
    }

    public void setMsgArea(JTextArea msgArea) {
        this.msgArea = msgArea;
    }

    public JTextField getIPTxt() {
        return IPTxt;
    }

    public void setIPTxt(JTextField iPTxt) {
        IPTxt = iPTxt;
    }

    public JButton getQingkongBtn() {
        return qingkongBtn;
    }

    public void setQingkongBtn(JButton qingkongBtn) {
        this.qingkongBtn = qingkongBtn;
    }
    

    public JComboBox getClassComb() {
        return classComb;
    }

    public void setClassComb(JComboBox classComb) {
        this.classComb = classComb;
    }

    public JTextField getWenbenTxt() {
        return wenbenTxt;
    }

    public void setWenbenTxt(JTextField wenbenTxt) {
        this.wenbenTxt = wenbenTxt;
    }

    public JButton getFasongBtn() {
        return fasongBtn;
    }

    public void setFasongBtn(JButton fasongBtn) {
        this.fasongBtn = fasongBtn;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Socket getFromClient() {
        return fromClient;
    }

    public void setFromClient(Socket fromClient) {
        this.fromClient = fromClient;
    }

    public String getStr3() {
        return str3;
    }

    public void setStr3(String str3) {
        this.str3 = str3;
    }
    
    
}

数据的传输

package com.lovo.work;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class MSGThread extends Thread{
    
    private Socket fromClient;
    private FeiqiuFrame feiqiuframe;
    
    public MSGThread(Socket fromClient,FeiqiuFrame feiqiuframe){
        this.fromClient = fromClient;
        this.feiqiuframe = feiqiuframe;
    }
    
    public void run(){
        BufferedReader br = null;
        try {
            br = new BufferedReader(new InputStreamReader(
                    fromClient.getInputStream()));
            String str = br.readLine();
            String[] allMsg = str.split("&");
            String str2=MSGThread.this.feiqiuframe.getMsgArea().getText();
            String str1=allMsg[0] + "说:" + allMsg[1];
            String str3=str2+"\n"+getFormatDate()+"\n"+str1;
            MSGThread.this.feiqiuframe.setStr3(str3);
            MSGThread.this.feiqiuframe.getMsgArea().setText(MSGThread.this.feiqiuframe.getStr3());
//        System.out.println(str2);
//        System.out.println(str1);
//        System.out.println(str3);
    
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally{
            if(br != null){
                try {
                    br.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            if(this.fromClient != null){
                try {
                    this.fromClient.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }
        
        
    }

    public static String getFormatDate()
    {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return sdf.format(Calendar.getInstance().getTime());
    }
    
}