局域网聊天工具

最新推荐文章于 2025-06-10 10:39:17 发布

原创最新推荐文章于 2025-06-10 10:39:17 发布 · 694 阅读

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CC 4.0 BY-SA版权

文章标签：

#服务器 #局域网聊天工具 #网络编程 #TCP #聊天

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实现要求：编写一个程序，服务器端与客户端可以实现聊天的功能，改进后可实现多个客户端群聊功能。

服务器的代码：



package pack1;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
public class Server_GUI extends JPanel implements  ActionListener,DocumentListener{
    static Vector<Socket> v=new Vector<Socket>();
    JLabel label;//标签
    JButton button;//发送按钮
    static JTextArea textinput,textoutput;//编辑发送,接收信息文本区
    static String str=null;static boolean flag=true,flag1=false;
    Server_GUI()
    {
        super(new FlowLayout());
        textoutput=new JTextArea(24,25);
        this.add(new JScrollPane(textoutput));
        textoutput.getDocument().addDocumentListener(this); 
        /*textinput=new JTextArea(12,25);
        this.add(new JScrollPane(textinput));
        //为文本区对象配置文档事件监听器
        textinput.getDocument().addDocumentListener(this);*/

        /*button=new JButton("发送");
        button.addActionListener(this);
        this.add(button);   */
    }
    //文本区监听处理
    public void changedUpdate(DocumentEvent e) {    }
    public void insertUpdate(DocumentEvent e) {     }
    public void removeUpdate(DocumentEvent e) {     }
    //按钮监听处理
    public void actionPerformed(ActionEvent e)
    {
        if(button==e.getSource())
        {
            flag=false;
        }
        else{}
    }
    public static void createAndShowGUI()
    {
        JFrame frame=new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //设置内容区
        frame.setContentPane(new Server_GUI());
        frame.setSize(350, 530);    
        frame.setTitle("服务器端");
        frame.setLocation(400, 300);
        frame.setVisible(true);
        frame.setResizable(false);//不可移动
    }
    public static void service(){
        ServerThread thread;
        Socket nextClient = null;
        ServerSocket server = null;
        DataInputStream in;
        DataOutputStream out;
        try {
            server = new ServerSocket(13);
            System.out.println("DayTime service started");
        }
        catch(IOException e1){System.out.println("正在监听，请稍等"+"\n");}
        while (true) {
            try {
                nextClient = server.accept();
                v.add(nextClient);

                System.out.println(
                        "有客户端连上服务端, 客户端信息如下：" + nextClient.getInetAddress() + " : " + nextClient.getPort() + ".\n");
            } catch (IOException e) {
                System.out.println("正在等待客户端的连接");
            }
            if (nextClient != null) {
                new ServerThread(nextClient).start();
            } else {
                continue;
            }
        }
            /*try{
            in=new DataInputStream(nextClient.getInputStream());
            out=new DataOutputStream(nextClient.getOutputStream());
            Scanner scanner=new Scanner(System.in);
            //BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
            //BufferedReader stdin=new BufferedReader(new InputStreamReader(nextClient.getInputStream()));   

            textoutput.append("有客户端连上服务端, 客户端信息如下：\n" +
                    nextClient.getInetAddress() + " : " +nextClient.getPort() + ".\n");         
            while(true){
                //当收到的消息不为空时        
                //while(in.readUTF()==null){}//当收到信息为空时等待
                String s = in.readUTF();
            textoutput.append(s+"\n");
            //强制把光标移到最末尾,滚动条移到最末尾，显示最新聊天记录
            textoutput.setCaretPosition(textoutput.getText().length());
            while(flag==true){
                //循环等待按钮触发
                System.out.print("");
            }       
            flag=true;
            str=textinput.getText();
            textinput.setText("");//清除文本区内容
            //textinput.setText("消息已发送");
            String send=str;
            textoutput.append("服务器："+send+"\n");
            //将要输出的字符串输出
            out.writeUTF("服务器："+send);      
            }
            }
            //清除未发送的字节
            finally {nextClient.close();}
        }       
         catch (IOException e) {}*/
}
    public boolean getFlag(){return flag;}
    //待调用函数
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable(){
            public void run(){
            createAndShowGUI();         
            }
        }); 
        service();
    }
}

与服务器同一个包中的ServerThread代码：

package pack1;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;

class ServerThread extends Thread{
    Socket socket;
    DataOutputStream out=null;
    DataInputStream in=null;
    String s=null;
    ServerThread(Socket t){
       socket=t;
       try{   in=new DataInputStream(socket.getInputStream());
            //out=new DataOutputStream(socket.getOutputStream());
       }
       catch (IOException e){}
    }  
    public void run(){
       while(true){
           try{  
               while(true){
                String s = in.readUTF();
            Server_GUI.textoutput.append(s+"\n");
            //强制把光标移到最末尾,滚动条移到最末尾，显示最新聊天记录
            Server_GUI.textoutput.setCaretPosition(Server_GUI.textoutput.getText().length());
            Server_GUI.str=s;

            String send=Server_GUI.str;
            //Server_GUI.textoutput.append("服务器："+send+"\n");
            //将要输出的字符串输出
            for(int i=0;i<Server_GUI.v.size();i++)
            {
             out=new DataOutputStream(Server_GUI.v.get(i).getOutputStream());
             out.writeUTF(send);    }   
            }
            }

           catch (IOException e){
                 System.out.println("客户离开");
                  break;
           }
       }
    }
}

客户端的代码：



package pack1;

import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.util.Scanner;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;

public class Client_GUI extends JPanel implements  ActionListener,DocumentListener{
    JLabel label;//标签
    JButton button;//发送按钮
    static JTextArea textinput,textoutput;//编辑发送,接收信息文本区
    static boolean flag=true;static String str=null;
    static DataInputStream in;
    static DataOutputStream out;
    Client_GUI()
    {
        super(new FlowLayout());
        textoutput=new JTextArea(12,25);
        this.add(new JScrollPane(textoutput));
        textoutput.getDocument().addDocumentListener(this);

        textinput=new JTextArea(12,25);
        this.add(new JScrollPane(textinput));
        //为文本区对象配置文档事件监听器
        textinput.getDocument().addDocumentListener(this);

        button=new JButton("发送");
        button.addActionListener(this);
        this.add(button);   
    }
    //文本区监听处理
    public void changedUpdate(DocumentEvent e) {    
    }
    public void insertUpdate(DocumentEvent e) { 
    }
    public void removeUpdate(DocumentEvent e) { 
    }
    //按钮监听处理
    public void actionPerformed(ActionEvent e)
    {
        if(button==e.getSource())
        {
            str=textinput.getText();
            textinput.setText("");
             String send = str;  
             try {
                out.writeUTF("克莱汤普森：" + send);
            } catch (IOException e1) {
                e1.printStackTrace();
            }  
        }
        else{}
    }
    public static void createAndShowGUI()
    {
        JFrame frame=new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //设置内容区
        frame.setContentPane(new Client_GUI());
        frame.setSize(350, 530);
        frame.setTitle("克莱汤普森");
        frame.setLocation(900, 300);
        frame.setVisible(true);
        frame.setResizable(false);//不可移动
    }
    public  static  void client(){
        String  hostname;
        hostname="localhost";//设定为本机,此地址为 获取目的精准时间的 地址
        try{
            Socket theSocket=new Socket(hostname,13);
            try{    
            in=new DataInputStream(theSocket.getInputStream());
            out=new DataOutputStream(theSocket.getOutputStream());
            Scanner scanner=new Scanner(System.in);

            //textoutput.append("已连接上服务器，开始对话吧！");
            while(true){    
                 String accpet=null;              
                 while((accpet = in.readUTF()).length()>0){ 
                 textoutput.append(accpet+"\n");
               //强制把光标移到最末尾,滚动条移到最末尾，显示最新聊天记录                textoutput.setCaretPosition(textoutput.getText().length());          
                 }
            }   
            }
            finally{theSocket.close();}
        }
        catch (IOException e) {
        }
    }
    //待调用函数
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        EventQueue.invokeLater(new Runnable(){
            public void run(){
            createAndShowGUI();     
            }
        }); client();
    }
}