本文實例為大家分享了Java實現簡單局域網聊天室的具體代碼，供大家參考，具體內容如下

1、TCP協議是面向連接的、可靠的、有序的、以字節流的方式發送數據，通過三次握手方式建立連接，形成傳輸數據的通道，在連接中進行大量數據的傳輸，效率會稍低

2、Java中基于TCP協議實現網絡通信的類

3、Socket通信的步驟

① 創建ServerSocket和Socket

② 打開連接到Socket的輸入/輸出流

③ 按照協議對Socket進行讀/寫操作

④ 關閉輸入輸出流、關閉Socket

4、服務器端：

① 創建ServerSocket對象，綁定監聽端口

② 通過accept()方法監聽客戶端請求

③ 連接建立后，通過輸入流讀取客戶端發送的請求信息

④ 通過輸出流向客戶端發送鄉音信息

⑤ 關閉相關資源

5、客戶端：

① 創建Socket對象，指明需要連接的服務器的地址和端口號

② 連接建立后，通過輸出流想服務器端發送請求信息

③ 通過輸入流獲取服務器響應的信息

④ 關閉響應資源

實現的效果是如下：

服務端代碼：

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('啟動服務器成功：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，客戶端請求服務端的詳細信息：' + client.toString());new ListenerClient(ui, client); }} catch (IOException e) { println('啟動服務器失敗：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 * 這個類是服務器端的等待客戶端發送信息* */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(); } //為每一個客戶端創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;//啟動服務器 public JButton btSend;//發送信息按鈕 public JTextField tfSend;//需要發送的文本信息 public JTextArea taShow;//信息展示 public Server server;//用來監聽客戶端連接 static List<Socket> clients;//保存連接到服務器的客戶端 public ServerUI() {super('服務器端');btStart = new JButton('啟動服務');btSend = new JButton('發送信息');tfSend = new JTextField(10); //裝在輸入文字taShow = new JTextArea();//點擊按鈕，所做的是事情，啟動服務器btStart.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {server = new Server(ServerUI.this); }});//點擊發送消息按鈕btSend.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {server.sendMsg(tfSend.getText());tfSend.setText(''); }});//初始化界面this.addWindowListener(new WindowAdapter() { //關閉按鈕點擊事件 public void windowClosing(WindowEvent e) {int a = JOptionPane.showConfirmDialog(null, '確定關閉嗎？', '溫馨提示',JOptionPane.YES_NO_OPTION);if (a == 1) { server.closeServer(); System.exit(0); // 關閉} }});//底部啟動服務按鈕與發送消息按鈕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);//這里設置連接服務器端的IP的端口 println('連接服務器成功，服務器端口地址：' + 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} catch (NumberFormatException nu) { println('端口請輸入正確.......'); nu.printStackTrace();} catch (IOException e) { println('連接服務器失敗：請輸入正確的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; //服務器ip public JTextField tfIP; //服務器ip public JTextField tfPort; //服務器端口 public JTextArea taShow; public Client server; public ClientUI() {super('客戶端');btStart = new JButton('啟動連接');btSend = new JButton('發送信息');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('服務地址');ipTex.setEditable(false);portText = new JTextPane();portText.setText('服務端口');portText.setEditable(false);taShow = new JTextArea();//啟動鏈接按鈕事件btStart.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {server = new Client(ClientUI.this); }});//發送按鈕事件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, '確定關閉嗎？', '溫馨提示',JOptionPane.YES_NO_OPTION);if (a == 1) { System.exit(0); // 關閉} }});//底部的發送信息框與鏈接按鈕JPanel top = new JPanel(new FlowLayout());top.add(tfSend); //發送文本top.add(btSend); //發送按鈕this.add(top, BorderLayout.SOUTH); //加載到底部 //頭部放連接服務的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內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。