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Java實(shí)現(xiàn)簡(jiǎn)單局域網(wǎng)聊天室

更新時(shí)間：2021年06月28日 09:47:17 作者：yundanfengqingfeng

這篇文章主要為大家詳細(xì)介紹了Java實(shí)現(xiàn)簡(jiǎn)單局域網(wǎng)聊天室，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了Java實(shí)現(xiàn)簡(jiǎn)單局域網(wǎng)聊天室的具體代碼，供大家參考，具體內(nèi)容如下

Java 的Socket編程：

1、TCP協(xié)議是面向連接的、可靠的、有序的、以字節(jié)流的方式發(fā)送數(shù)據(jù)，通過三次握手方式建立連接，形成傳輸數(shù)據(jù)的通道，在連接中進(jìn)行大量數(shù)據(jù)的傳輸，效率會(huì)稍低

2、Java中基于TCP協(xié)議實(shí)現(xiàn)網(wǎng)絡(luò)通信的類

客戶端的Socket類
服務(wù)器端的ServerSocket類

3、Socket通信的步驟

① 創(chuàng)建ServerSocket和Socket

② 打開連接到Socket的輸入/輸出流

③ 按照協(xié)議對(duì)Socket進(jìn)行讀/寫操作

④ 關(guān)閉輸入輸出流、關(guān)閉Socket

4、服務(wù)器端：

① 創(chuàng)建ServerSocket對(duì)象，綁定監(jiān)聽端口

② 通過accept()方法監(jiān)聽客戶端請(qǐng)求

③ 連接建立后，通過輸入流讀取客戶端發(fā)送的請(qǐng)求信息

④ 通過輸出流向客戶端發(fā)送鄉(xiāng)音信息

⑤ 關(guān)閉相關(guān)資源

5、客戶端：

① 創(chuàng)建Socket對(duì)象，指明需要連接的服務(wù)器的地址和端口號(hào)

② 連接建立后，通過輸出流想服務(wù)器端發(fā)送請(qǐng)求信息

③ 通過輸入流獲取服務(wù)器響應(yīng)的信息

④ 關(guān)閉響應(yīng)資源

實(shí)現(xiàn)的聊天室例子：

實(shí)現(xiàn)的效果是如下：

服務(wù)端代碼：

package socket.server;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
 
/**
 * @author 超
 * Create by fengc on  2018/7/25 21:21
 */
public class Server extends Thread{
 
    ServerUI ui;
    ServerSocket ss;
    BufferedReader reader;
    PrintWriter writer;
 
    public Server(ServerUI ui) {
        this.ui = ui;
        this.start();
    }
 
    @Override
    public void run() {
        try {
            ss = new ServerSocket(8081);
            ui.clients=new ArrayList<>();
            println("啟動(dòng)服務(wù)器成功：端口8081");
            while (true) {
                println("等待客戶端鏈接.......................................");
                Socket client = ss.accept();
                ui.clients.add(client);
                println("連接成功，客戶端請(qǐng)求服務(wù)端的詳細(xì)信息：" + client.toString());
                new ListenerClient(ui, client);
            }
        } catch (IOException e) {
            println("啟動(dòng)服務(wù)器失敗：端口8081");
            println(e.toString());
            e.printStackTrace();
        }
 
    }
 
    public synchronized void sendMsg(String msg) {
        try {
            for (int i = 0; i < ui.clients.size(); i++) {
                Socket client = ui.clients.get(i);
                writer = new PrintWriter(client.getOutputStream(), true);
                writer.println(msg);
            }
        } catch (Exception e) {
            println(e.toString());
        }
    }
 
    public void println(String s) {
        if (s != null) {
            s = "服務(wù)端打印消息：" + s;
            this.ui.taShow.setText(this.ui.taShow.getText() + s + "\n");
            System.out.println(s + "\n");
        }
    }
 
    public void closeServer() {
        try {
            if (ss != null)
                ss.close();
            if (reader != null)
                reader.close();
            if (writer != null)
                writer.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
 
    }
 
}

package socket.server;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
 
/**
 * @author 超
 * Create by fengc on  2018/7/25 21:33
 * 這個(gè)類是服務(wù)器端的等待客戶端發(fā)送信息*
 */
public class ListenerClient extends Thread{
 
    BufferedReader reader;
    PrintWriter writer;
    ServerUI ui;
    Socket client;
 
    public ListenerClient(ServerUI ui, Socket client) {
        this.ui = ui;
        this.client=client;
        this.start();
    }
 
    //為每一個(gè)客戶端創(chuàng)建線程等待接收信息，然后把信息廣播出去
    @Override
    public void run() {
        String msg = "";
        while (true) {
            try {
                reader = new BufferedReader(new InputStreamReader(client.getInputStream()));
                writer = new PrintWriter(client.getOutputStream(), true);
                msg = reader.readLine();
                sendMsg(msg);
            } catch (IOException e) {
                println(e.toString());
                break;
            }
            if (msg != null && msg.trim() != "") {
                println("客戶端 " + msg);
            }
        }
    }
 
    //把信息廣播到所有用戶
    public synchronized void sendMsg(String msg) {
        try {
            for (int i = 0; i < ui.clients.size(); i++) {
                Socket client = ui.clients.get(i);
                writer = new PrintWriter(client.getOutputStream(), true);
                writer.println(msg);
            }
 
        } catch (Exception e) {
            println(e.toString());
        }
    }
 
    public void println(String s) {
        if (s != null) {
            this.ui.taShow.setText(this.ui.taShow.getText() + s + "\n");
            System.out.println(s + "\n");
        }
    }
}

package socket.server;
 
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.net.Socket;
import java.util.List;
 
/**
 * @author 超
 * Create by fengc on  2018/7/25 21:21
 */
public class ServerUI extends JFrame {
 
    public static void main(String[] args) {
        new ServerUI();
    }
 
    public JButton btStart;//啟動(dòng)服務(wù)器
    public JButton btSend;//發(fā)送信息按鈕
    public JTextField tfSend;//需要發(fā)送的文本信息
 
    public JTextArea taShow;//信息展示
    public Server server;//用來監(jiān)聽客戶端連接
    static List<Socket> clients;//保存連接到服務(wù)器的客戶端
 
    public ServerUI() {
        super("服務(wù)器端");
        btStart = new JButton("啟動(dòng)服務(wù)");
        btSend = new JButton("發(fā)送信息");
        tfSend = new JTextField(10); //裝在輸入文字
        taShow = new JTextArea();
        //點(diǎn)擊按鈕，所做的是事情，啟動(dòng)服務(wù)器
        btStart.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                server = new Server(ServerUI.this);
            }
        });
        //點(diǎn)擊發(fā)送消息按鈕
        btSend.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                server.sendMsg(tfSend.getText());
                tfSend.setText("");
            }
        });
        //初始化界面
        this.addWindowListener(new WindowAdapter() {
            //關(guān)閉按鈕點(diǎn)擊事件
            public void windowClosing(WindowEvent e) {
                int a = JOptionPane.showConfirmDialog(null, "確定關(guān)閉嗎？", "溫馨提示",
                        JOptionPane.YES_NO_OPTION);
                if (a == 1) {
                    server.closeServer();
                    System.exit(0); // 關(guān)閉
                }
            }
        });
        //底部啟動(dòng)服務(wù)按鈕與發(fā)送消息按鈕
        JPanel top = new JPanel(new FlowLayout());
        top.add(tfSend);
        top.add(btSend);
        top.add(btStart);
        this.add(top, BorderLayout.SOUTH);
        //中部顯示消息欄  信息展示
        final JScrollPane sp = new JScrollPane();
        sp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        sp.setViewportView(this.taShow);
        this.taShow.setEditable(false);
        this.add(sp, BorderLayout.CENTER);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(400, 300);
        this.setLocation(100, 200);
        this.setVisible(true);
    }
 
 
}

客戶端代碼：

package socket.clinet;
 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
 
/**
 * @author 超
 * Create by fengc on  2018/7/25 21:41
 */
public class Client extends Thread {
 
    ClientUI ui;
    Socket client;
    BufferedReader reader;
    PrintWriter writer;
 
    public Client(ClientUI ui) {
        this.ui = ui;
        try {
            String ip = ui.tfIP.getText(); //得到輸入的ip地址
            int port = Integer.parseInt(ui.tfPort.getText()); //得到輸入的端口
            client = new Socket(ip, port);//這里設(shè)置連接服務(wù)器端的IP的端口
            println("連接服務(wù)器成功，服務(wù)器端口地址：" + port);
            reader = new BufferedReader(new InputStreamReader(client.getInputStream()));
            writer = new PrintWriter(client.getOutputStream(), true);
            String name = ui.tfName.getText();
            if (name == null || "".equals(name)) {
                name = "匿名者";
            }
            sendMsg("會(huì)員 " + name + ",登錄上來了........................");
            // 如果為 true，則 println、printf 或 format 方法將刷新輸出緩沖區(qū)
        } catch (NumberFormatException nu) {
            println("端口請(qǐng)輸入正確.......");
            nu.printStackTrace();
        } catch (IOException e) {
            println("連接服務(wù)器失?。赫?qǐng)輸入正確的IP地址與端口");
            println(e.toString());
            e.printStackTrace();
        }
        this.start();
    }
 
    public void run() {
        String msg = "";
        while (true) {
            try {
                msg = reader.readLine();
            } catch (IOException e) {
                println("服務(wù)器斷開連接");
 
                break;
            }
            if (msg != null && msg.trim() != "") {
                println(msg);
            }
        }
    }
 
    public void sendMsg(String msg) {
        try {
            writer.println(msg);
        } catch (Exception e) {
            println(e.toString());
        }
    }
 
    public void println(String s) {
        if (s != null) {
            this.ui.taShow.setText(this.ui.taShow.getText() + s + "\n");
            System.out.println(s + "\n");
        }
    }
 
}

package socket.clinet;
 
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
 
/**
 * @author 超
 * Create by fengc on  2018/7/25 21:40
 */
public class ClientUI extends JFrame {
 
    public static void main(String[] args) {
        new ClientUI();
    }
 
    public     JButton btStart;
    public     JButton btSend;
    public     JTextField tfSend; //裝在輸入文字
    public     JTextPane  nameText; //輸入名字
    public     JTextPane  ipTex; //輸入名字
    public     JTextPane  portText; //輸入名字
    public     JTextField tfName; //服務(wù)器ip
    public     JTextField tfIP; //服務(wù)器ip
    public     JTextField tfPort; //服務(wù)器端口
    public     JTextArea taShow;
    public     Client server;
 
    public ClientUI() {
        super("客戶端");
        btStart = new JButton("啟動(dòng)連接");
        btSend = new JButton("發(fā)送信息");
        tfSend = new JTextField(20);
        tfIP = new JTextField(8);
        tfPort = new JTextField(3);
        tfName = new JTextField(6);
        nameText = new JTextPane();nameText.setText("登錄名");nameText.setEditable(false);
        ipTex = new JTextPane();ipTex.setText("服務(wù)地址");ipTex.setEditable(false);
        portText = new JTextPane();portText.setText("服務(wù)端口");portText.setEditable(false);
        taShow = new JTextArea();
        //啟動(dòng)鏈接按鈕事件
        btStart.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                server = new Client(ClientUI.this);
            }
        });
        //發(fā)送按鈕事件
        btSend.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String name = tfName.getText();
                if (name == null || "".equals(name)) {
                    name = "匿名者";
                }
                server.sendMsg(name + "：" + tfSend.getText());
                tfSend.setText("");
            }
        });
 
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                int a = JOptionPane.showConfirmDialog(null, "確定關(guān)閉嗎？", "溫馨提示",
                        JOptionPane.YES_NO_OPTION);
                if (a == 1) {
                    System.exit(0); // 關(guān)閉
                }
            }
        });
        //底部的發(fā)送信息框與鏈接按鈕
        JPanel top = new JPanel(new FlowLayout());
        top.add(tfSend); //發(fā)送文本
        top.add(btSend); //發(fā)送按鈕
        this.add(top, BorderLayout.SOUTH); //加載到底部
 
        //頭部放連接服務(wù)的
        JPanel northJpannel = new JPanel(new FlowLayout());
        northJpannel.add(nameText);
        northJpannel.add(tfName);
        northJpannel.add(ipTex);
        northJpannel.add(tfIP);
        northJpannel.add(portText);
        northJpannel.add(tfPort);
        northJpannel.add(btStart);
        this.add(northJpannel,BorderLayout.NORTH);  //加載到頭部
 
        final JScrollPane sp = new JScrollPane();
        sp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        sp.setViewportView(this.taShow);
        this.taShow.setEditable(false);
        this.add(sp, BorderLayout.CENTER);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(500, 400);
        this.setLocation(600, 200);
        this.setVisible(true);
    }
 
 
 
}

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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