这期内容当中小编将会给大家带来有关使用java怎么实现一个局域网聊天小程序，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
Client.java 客户端代码
package chat;
import java.awt.BorderLayout;//布置容器的边框布局
import java.awt.Color;
import java.awt.Container;
import java.awt.GridLayout;//布局处理器
import java.awt.Toolkit;//抽象超类
import java.awt.event.ActionEvent;//指示发生了组件定义的动作的语义事件
import java.awt.event.ActionListener;//用于接收操作事件的侦听器接口
import java.awt.event.MouseEvent;//指示组件中发生鼠标动作的事件
import java.awt.event.MouseListener;//鼠标事件的侦听器接口
import java.awt.event.WindowAdapter;//接收窗口事件的抽象适配器类。此类中的方法为空。此类存在的目的是方便创建侦听器对象
import java.awt.event.WindowEvent;//指示窗口状态改变的低级别事件
import java.io.BufferedReader;//提供通用的缓冲方式文本读取
import java.io.IOException;//输入输出异常
import java.io.InputStreamReader;//字节流通向字符流的桥梁
import java.io.PrintWriter;//向文本输出流打印对象的格式化表示形式
import java.net.Socket;//套接字，网络上的两个程序通过一个双向的通信连接实现数据交换的通信
import java.util.HashMap;// HashMap 是 Map 接口的常用实现类
import java.util.Map;//存数据，将键映射到值的对象
import java.util.StringTokenizer;//允许应用程序将字符串分解为标记
import javax.swing.BorderFactory;//创建一个浮雕式的边框
import javax.swing.DefaultListModel;//列表模型
import javax.swing.JButton;//按钮
import javax.swing.JFrame;//窗口
import javax.swing.JLabel;//标签
import javax.swing.JList;//列表
import javax.swing.JOptionPane;//对话框
import javax.swing.JPanel;
import javax.swing.JScrollPane;//视图
import javax.swing.JSplitPane;//分隔
import javax.swing.JTextArea;//多行文本
import javax.swing.JTextField;//文本
import javax.swing.border.EmptyBorder;//一个占用空间但不执行绘制的空透明边框
import javax.swing.border.TitledBorder;//该类实现在指定位置以指定对齐方式显示字符串标题的任意边框
import oldchat.ChatFrame;
public class Client
{
private JFrame frame;
private JList userList;
private JTextArea textArea;
private JTextField textField;
private JTextField txt_port;
private JTextField txt_hostIp;
private JTextField txt_name;
private JButton btn_start;
private JButton btn_stop;
private JButton btn_send;
private JPanel northPanel;
private JPanel southPanel;
private JScrollPane rightScroll;
private JScrollPane leftScroll;
private JSplitPane centerSplit;
private DefaultListModel listModel;
private boolean isConnected = false;
private Socket socket;//创建套接字
private PrintWriter writer;
private BufferedReader reader;
private MessageThread messageThread;// 负责接收消息的线程
private Map<String, User> onLineUsers = new HashMap<String, User>();// 所有在线用户
// 主方法,程序入口
public static void main(String[] args)
{
new Client();
}
// 执行发送
public void send()
{
if (!isConnected)
{
JOptionPane.showMessageDialog(frame, "还没有连接服务器，无法发送消息！", "错误",
JOptionPane.ERROR_MESSAGE);
return;
}
String message = textField.getText().trim();
if (message == null || message.equals(""))
{
JOptionPane.showMessageDialog(frame, "消息不能为空！", "错误",
JOptionPane.ERROR_MESSAGE);
return;
}
sendMessage(frame.getTitle() + "@" + "ALL" + "@" + message);
textField.setText(null);
}
// 构造方法
public Client()
{
textArea = new JTextArea();
textArea.setEditable(false);
textArea.setForeground(Color.blue);
textField = new JTextField();
txt_port = new JTextField("6666");
txt_hostIp = new JTextField();
txt_name = new JTextField();
btn_start = new JButton("连接");
btn_stop = new JButton("断开");
btn_send = new JButton("发送");
listModel = new DefaultListModel();
userList = new JList(listModel);
northPanel = new JPanel();
northPanel.setLayout(new GridLayout(1, 7));
northPanel.add(new JLabel("端口"));
northPanel.add(txt_port);
northPanel.add(new JLabel("服务器IP"));
northPanel.add(txt_hostIp);
northPanel.add(new JLabel("姓名"));
northPanel.add(txt_name);
northPanel.add(btn_start);
northPanel.add(btn_stop);
northPanel.setBorder(new TitledBorder("连接信息"));
rightScroll = new JScrollPane(textArea);
rightScroll.setBorder(new TitledBorder("群聊消息显示区"));
leftScroll = new JScrollPane(userList);
leftScroll.setBorder(new TitledBorder("在线用户(双击私聊)"));
southPanel = new JPanel(new BorderLayout());
southPanel.add(textField, "Center");
southPanel.add(btn_send, "East");
southPanel.setBorder(new TitledBorder("写消息"));
centerSplit = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, leftScroll,
rightScroll);
centerSplit.setDividerLocation(100);
frame = new JFrame("客户端");
// 更改JFrame的图标：
//frame.setIconImage(Toolkit.getDefaultToolkit().createImage(Client.class.getResource("qq.jpg")));
frame.setLayout(new BorderLayout());
frame.add(northPanel, "North");
frame.add(centerSplit, "Center");
frame.add(southPanel, "South");
frame.setSize(600, 400);
int screen_width = Toolkit.getDefaultToolkit().getScreenSize().width;
int screen_height = Toolkit.getDefaultToolkit().getScreenSize().height;
frame.setLocation((screen_width - frame.getWidth()) / 2,
(screen_height - frame.getHeight()) / 2);
frame.setVisible(true);
// 写消息的文本框中按回车键时事件
textField.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent arg0)
{
send();
}
});
// 单击发送按钮时事件
btn_send.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
send();
}
});
// 单击连接按钮时事件
btn_start.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
int port;
if (isConnected) {
JOptionPane.showMessageDialog(frame, "已处于连接上状态，不要重复连接!",
"错误", JOptionPane.ERROR_MESSAGE);
return;
}
try {
try {
port = Integer.parseInt(txt_port.getText().trim());
} catch (NumberFormatException e2) {
throw new Exception("端口号不符合要求!端口为整数!");
}
String hostIp = txt_hostIp.getText().trim();
String name = txt_name.getText().trim();
if (name.equals("") || hostIp.equals("")) {
throw new Exception("姓名、服务器IP不能为空!");
}
boolean flag = connectServer(port, hostIp, name);
if (flag == false) {
throw new Exception("与服务器连接失败!");
}
frame.setTitle(name);
JOptionPane.showMessageDialog(frame, "成功连接!");
} catch (Exception exc) {
JOptionPane.showMessageDialog(frame, exc.getMessage(),
"错误", JOptionPane.ERROR_MESSAGE);
}
}
});
//双击聊天（私聊）
userList.addMouseListener(new MouseListener()
{
public void mouseReleased(MouseEvent e) {}
public void mousePressed(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
public void mouseEntered(MouseEvent e) {}
public void mouseClicked(MouseEvent e)
{
if(e.getClickCount()==2)
{
User user=onLineUsers.get(userList.getSelectedValue());
ChatFrame.main(user.getIp());;
}
}
});
// 单击断开按钮时事件
btn_stop.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
if (!isConnected) {
JOptionPane.showMessageDialog(frame, "已处于断开状态，不要重复断开!",
"错误", JOptionPane.ERROR_MESSAGE);
return;
}
try {
boolean flag = closeConnection();// 断开连接
if (flag == false) {
throw new Exception("断开连接发生异常！");
}
JOptionPane.showMessageDialog(frame, "成功断开!");
} catch (Exception exc) {
JOptionPane.showMessageDialog(frame, exc.getMessage(),
"错误", JOptionPane.ERROR_MESSAGE);
}
}
});
// 关闭窗口时事件
frame.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
if (isConnected) {
closeConnection();// 关闭连接
}
System.exit(0);// 退出程序
}
});
}
/**
* 连接服务器
*
* @param port
* @param hostIp
* @param name
*/
public boolean connectServer(int port, String hostIp, String name)
{
// 连接服务器
try {
socket = new Socket(hostIp, port);// 根据端口号和服务器ip建立连接
writer = new PrintWriter(socket.getOutputStream());
reader = new BufferedReader(new InputStreamReader(socket
.getInputStream()));
// 发送客户端用户基本信息(用户名和ip地址)
sendMessage(name + "@" + socket.getLocalAddress().toString());
// 开启接收消息的线程
messageThread = new MessageThread(reader, textArea);
messageThread.start();
isConnected = true;// 已经连接上了
return true;
} catch (Exception e) {
textArea.append("与端口号为：" + port + " IP地址为：" + hostIp
+ " 的服务器连接失败!" + "\r\n");
isConnected = false;// 未连接上
return false;
}
}
/**
* 发送消息
*
* @param message
*/
public void sendMessage(String message)
{
writer.println(message);
writer.flush();
}
/**
* 客户端主动关闭连接
*/
@SuppressWarnings("deprecation")
public synchronized boolean closeConnection()
{
try {
sendMessage("CLOSE");// 发送断开连接命令给服务器
messageThread.stop();// 停止接受消息线程
// 释放资源
if (reader != null) {
reader.close();
}
if (writer != null) {
writer.close();
}
if (socket != null) {
socket.close();
}
isConnected = false;
return true;
} catch (IOException e1) {
e1.printStackTrace();
isConnected = true;
return false;
}
}
// 不断接收消息的线程
class MessageThread extends Thread {
private BufferedReader reader;
private JTextArea textArea;
// 接收消息线程的构造方法
public MessageThread(BufferedReader reader, JTextArea textArea)
{
this.reader = reader;
this.textArea = textArea;
}
// 被动的关闭连接
public synchronized void closeCon() throws Exception
{
// 清空用户列表
listModel.removeAllElements();
// 被动的关闭连接释放资源
if (reader != null) {
reader.close();
}
if (writer != null) {
writer.close();
}
if (socket != null) {
socket.close();
}
isConnected = false;// 修改状态为断开
}
public void run() {
String message = "";
while (true) {
try {
message = reader.readLine();
StringTokenizer stringTokenizer = new StringTokenizer(message, "/@");
String command = stringTokenizer.nextToken();// 命令
if (command.equals("CLOSE"))// 服务器已关闭命令
{
textArea.append("服务器已关闭!\r\n");
closeCon();// 被动的关闭连接
return;// 结束线程
} else if (command.equals("ADD")) {// 有用户上线更新在线列表
String username = "";
String userIp = "";
if ((username = stringTokenizer.nextToken()) != null
&& (userIp = stringTokenizer.nextToken()) != null)
{
User user = new User(username, userIp);
onLineUsers.put(username, user);
listModel.addElement(username);
}
} else if (command.equals("DELETE")) {// 有用户下线更新在线列表
String username = stringTokenizer.nextToken();
User user = (User) onLineUsers.get(username);
onLineUsers.remove(user);
listModel.removeElement(username);
} else if (command.equals("USERLIST")) {// 加载在线用户列表
int size = Integer
.parseInt(stringTokenizer.nextToken());
String username = null;
String userIp = null;
for (int i = 0; i < size; i++) {
username = stringTokenizer.nextToken();
userIp = stringTokenizer.nextToken();
User user = new User(username, userIp);
onLineUsers.put(username, user);
listModel.addElement(username);
}
} else if (command.equals("MAX")) {// 人数已达上限
textArea.append(stringTokenizer.nextToken()
+ stringTokenizer.nextToken() + "\r\n");
closeCon();// 被动的关闭连接
JOptionPane.showMessageDialog(frame, "服务器缓冲区已满！", "错误",
JOptionPane.ERROR_MESSAGE);
return;// 结束线程
} else {// 普通消息
textArea.append(message + "\r\n");
}
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
Server.java
package chat;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.BindException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.StringTokenizer;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.border.TitledBorder;
public class Server
{
private JFrame frame;
private JTextArea contentArea;
private JTextField txt_message;
private JTextField txt_max;
private JTextField txt_port;
private JButton btn_start;
private JButton btn_stop;
private JButton btn_send;
private JPanel northPanel;
private JPanel southPanel;
private JScrollPane rightPanel;
private JScrollPane leftPanel;
private JSplitPane centerSplit;
private JList userList;
private DefaultListModel listModel;
private ServerSocket serverSocket;
private ServerThread serverThread;
private ArrayList<ClientThread> clients;
private boolean isStart = false;
// 主方法,程序执行入口
public static void main(String[] args)
{
new Server();
}
// 执行消息发送
public void send()
{
if (!isStart)
{
JOptionPane.showMessageDialog(frame, "服务器还未启动,不能发送消息！", "错误",
JOptionPane.ERROR_MESSAGE);
return;
}
if (clients.size() == 0)
{
JOptionPane.showMessageDialog(frame, "没有用户在线,不能发送消息！", "错误",
JOptionPane.ERROR_MESSAGE);
return;
}
String message = txt_message.getText().trim();
if (message == null || message.equals(""))
{
JOptionPane.showMessageDialog(frame, "消息不能为空！", "错误",
JOptionPane.ERROR_MESSAGE);
return;
}
sendServerMessage(message);// 群发服务器消息
contentArea.append("服务器说：" + txt_message.getText() + "\r\n");
txt_message.setText(null);
}
// 构造放法
public Server()
{
frame = new JFrame("服务器");
// 更改JFrame的图标：
//frame.setIconImage(Toolkit.getDefaultToolkit().createImage(Client.class.getResource("qq.png")));
//frame.setIconImage(Toolkit.getDefaultToolkit().createImage(Server.class.getResource("qq.jpg")));
contentArea = new JTextArea();
contentArea.setEditable(false);
contentArea.setForeground(Color.blue);
txt_message = new JTextField();
txt_max = new JTextField("30");
txt_port = new JTextField("6666");
btn_start = new JButton("启动");
btn_stop = new JButton("停止");
btn_send = new JButton("发送");
btn_stop.setEnabled(false);
listModel = new DefaultListModel();
userList = new JList(listModel);
southPanel = new JPanel(new BorderLayout());
southPanel.setBorder(new TitledBorder("写消息"));
southPanel.add(txt_message, "Center");
southPanel.add(btn_send, "East");
leftPanel = new JScrollPane(userList);
leftPanel.setBorder(new TitledBorder("在线用户"));
rightPanel = new JScrollPane(contentArea);
rightPanel.setBorder(new TitledBorder("群聊消息显示区"));
centerSplit = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, leftPanel,
rightPanel);
centerSplit.setDividerLocation(100);
northPanel = new JPanel();
northPanel.setLayout(new GridLayout(1, 6));
northPanel.add(new JLabel("人数上限"));
northPanel.add(txt_max);
northPanel.add(new JLabel("端口"));
northPanel.add(txt_port);
northPanel.add(btn_start);
northPanel.add(btn_stop);
northPanel.setBorder(new TitledBorder("配置信息"));
frame.setLayout(new BorderLayout());
frame.add(northPanel, "North");
frame.add(centerSplit, "Center");
frame.add(southPanel, "South");
frame.setSize(600, 400);
//frame.setSize(Toolkit.getDefaultToolkit().getScreenSize());//设置全屏
int screen_width = Toolkit.getDefaultToolkit().getScreenSize().width;
int screen_height = Toolkit.getDefaultToolkit().getScreenSize().height;
frame.setLocation((screen_width - frame.getWidth()) / 2,
(screen_height - frame.getHeight()) / 2);
frame.setVisible(true);
// 关闭窗口时事件
frame.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
if (isStart) {
closeServer();// 关闭服务器
}
System.exit(0);// 退出程序
}
});
// 文本框按回车键时事件
txt_message.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
send();
}
});
// 单击发送按钮时事件
btn_send.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent arg0)
{
send();
}
});
// 单击启动服务器按钮时事件
btn_start.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
if (isStart) {
JOptionPane.showMessageDialog(frame, "服务器已处于启动状态，不要重复启动！",
"错误", JOptionPane.ERROR_MESSAGE);
return;
}
int max;
int port;
try {
try {
max = Integer.parseInt(txt_max.getText());
} catch (Exception e1) {
throw new Exception("人数上限为正整数！");
}
if (max <= 0) {
throw new Exception("人数上限为正整数！");
}
try {
port = Integer.parseInt(txt_port.getText());
} catch (Exception e1) {
throw new Exception("端口号为正整数！");
}
if (port <= 0) {
throw new Exception("端口号 为正整数！");
}
serverStart(max, port);
contentArea.append("服务器已成功启动!人数上限：" + max + ",端口：" + port
+ "\r\n");
JOptionPane.showMessageDialog(frame, "服务器成功启动!");
btn_start.setEnabled(false);
txt_max.setEnabled(false);
txt_port.setEnabled(false);
btn_stop.setEnabled(true);
} catch (Exception exc) {
JOptionPane.showMessageDialog(frame, exc.getMessage(),
"错误", JOptionPane.ERROR_MESSAGE);
}
}
});
// 单击停止服务器按钮时事件
btn_stop.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
if (!isStart) {
JOptionPane.showMessageDialog(frame, "服务器还未启动，无需停止！", "错误",
JOptionPane.ERROR_MESSAGE);
return;
}
try {
closeServer();
btn_start.setEnabled(true);
txt_max.setEnabled(true);
txt_port.setEnabled(true);
btn_stop.setEnabled(false);
contentArea.append("服务器成功停止!\r\n");
JOptionPane.showMessageDialog(frame, "服务器成功停止！");
} catch (Exception exc) {
JOptionPane.showMessageDialog(frame, "停止服务器发生异常！", "错误",
JOptionPane.ERROR_MESSAGE);
}
}
});
}
// 启动服务器
public void serverStart(int max, int port) throws java.net.BindException
{
try {
clients = new ArrayList<ClientThread>();
serverSocket = new ServerSocket(port);
serverThread = new ServerThread(serverSocket, max);
serverThread.start();
isStart = true;
} catch (BindException e) {
isStart = false;
throw new BindException("端口号已被占用，请换一个！");
} catch (Exception e1) {
e1.printStackTrace();
isStart = false;
throw new BindException("启动服务器异常！");
}
}
// 关闭服务器
@SuppressWarnings("deprecation")
public void closeServer() {
try {
if (serverThread != null)
serverThread.stop();// 停止服务器线程
for (int i = clients.size() - 1; i >= 0; i--) {
// 给所有在线用户发送关闭命令
clients.get(i).getWriter().println("CLOSE");
clients.get(i).getWriter().flush();
// 释放资源
clients.get(i).stop();// 停止此条为客户端服务的线程
clients.get(i).reader.close();
clients.get(i).writer.close();
clients.get(i).socket.close();
clients.remove(i);
}
if (serverSocket != null) {
serverSocket.close();// 关闭服务器端连接
}
listModel.removeAllElements();// 清空用户列表
isStart = false;
} catch (IOException e) {
e.printStackTrace();
isStart = true;
}
}
// 群发服务器消息
public void sendServerMessage(String message) {
for (int i = clients.size() - 1; i >= 0; i--) {
clients.get(i).getWriter().println("服务器：" + message);
clients.get(i).getWriter().flush();
}
}
// 服务器线程
class ServerThread extends Thread {
private ServerSocket serverSocket;
private int max;// 人数上限
// 服务器线程的构造方法
public ServerThread(ServerSocket serverSocket, int max) {
this.serverSocket = serverSocket;
this.max = max;
}
public void run() {
while (true) {// 不停的等待客户端的链接
try {
Socket socket = serverSocket.accept();
if (clients.size() == max) {// 如果已达人数上限
BufferedReader r = new BufferedReader(
new InputStreamReader(socket.getInputStream()));
PrintWriter w = new PrintWriter(socket
.getOutputStream());
// 接收客户端的基本用户信息
String inf = r.readLine();
StringTokenizer st = new StringTokenizer(inf, "@");
User user = new User(st.nextToken(), st.nextToken());
// 反馈连接成功信息
w.println("MAX@服务器：对不起，" + user.getName()
+ user.getIp() + "，服务器在线人数已达上限，请稍后尝试连接！");
w.flush();
// 释放资源
r.close();
w.close();
socket.close();
continue;
}
ClientThread client = new ClientThread(socket);
client.start();// 开启对此客户端服务的线程
clients.add(client);
listModel.addElement(client.getUser().getName());// 更新在线列表
contentArea.append(client.getUser().getName()
+ client.getUser().getIp() + "上线!\r\n");
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
// 为一个客户端服务的线程
class ClientThread extends Thread
{
private Socket socket;
private BufferedReader reader;
private PrintWriter writer;
private User user;
public BufferedReader getReader()
{
return reader;
}
public PrintWriter getWriter()
{
return writer;
}
public User getUser()
{
return user;
}
// 客户端线程的构造方法
public ClientThread(Socket socket)
{
try {
this.socket = socket;
reader = new BufferedReader(new InputStreamReader(socket
.getInputStream()));
writer = new PrintWriter(socket.getOutputStream());
// 接收客户端的基本用户信息
String inf = reader.readLine();
StringTokenizer st = new StringTokenizer(inf, "@");
user = new User(st.nextToken(), st.nextToken());
// 反馈连接成功信息
writer.println(user.getName() + user.getIp() + "与服务器连接成功!");
writer.flush();
// 反馈当前在线用户信息
if (clients.size() > 0)
{
String temp = "";
for (int i = clients.size() - 1; i >= 0; i--)
{
temp += (clients.get(i).getUser().getName() + "/" + clients
.get(i).getUser().getIp())
+ "@";
}
writer.println("USERLIST@" + clients.size() + "@" + temp);
writer.flush();
}
// 向所有在线用户发送该用户上线命令
for (int i = clients.size() - 1; i >= 0; i--)
{
clients.get(i).getWriter().println(
"ADD@" + user.getName() + user.getIp());
clients.get(i).getWriter().flush();
}
} catch (IOException e)
{
e.printStackTrace();
}
}
@SuppressWarnings("deprecation")
public void run() {// 不断接收客户端的消息，进行处理。
String message = null;
while (true) {
try {
message = reader.readLine();// 接收客户端消息
if (message.equals("CLOSE"))// 下线命令
{
contentArea.append(this.getUser().getName()
+ this.getUser().getIp() + "下线!\r\n");
// 断开连接释放资源
reader.close();
writer.close();
socket.close();
// 向所有在线用户发送该用户的下线命令
for (int i = clients.size() - 1; i >= 0; i--)
{
clients.get(i).getWriter().println(
"DELETE@" + user.getName());
clients.get(i).getWriter().flush();
}
listModel.removeElement(user.getName());// 更新在线列表
// 删除此条客户端服务线程
for (int i = clients.size() - 1; i >= 0; i--)
{
if (clients.get(i).getUser() == user)
{
ClientThread temp = clients.get(i);
clients.remove(i);// 删除此用户的服务线程
temp.stop();// 停止这条服务线程
return;
}
}
} else {
dispatcherMessage(message);// 转发消息
}
} catch (IOException e)
{
e.printStackTrace();
}
}
}
// 转发消息
public void dispatcherMessage(String message)
{
StringTokenizer stringTokenizer = new StringTokenizer(message, "@");
String source = stringTokenizer.nextToken();
String owner = stringTokenizer.nextToken();
String content = stringTokenizer.nextToken();
message = source + "说：" + content;
contentArea.append(message + "\r\n");
if (owner.equals("ALL")) {// 群发
for (int i = clients.size() - 1; i >= 0; i--) {
clients.get(i).getWriter().println(message);
clients.get(i).getWriter().flush();
}
}
}
}
}
运行截图
上述就是小编为大家分享的使用java怎么实现一个局域网聊天小程序了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注亿速云行业资讯频道。
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