1.创建包
1.服务界面
package yiduiy;
import java.awt.BorderLayout;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Set;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class fuwumianban extends JFrame {
private JTextArea ta_info;
private ServerSocket server; // 声明ServerSocket对象
private Socket socket; // 声明Socket对象socket
private Hashtable<String, Socket> map = new Hashtable<String, Socket>();// 用于存储连接到服务器的用户和客户端套接字对象
public void createSocket() {
try {
server = new ServerSocket(1978);
while (true) {
ta_info.append("等待新客户连接......\n");
socket = server.accept();// 创建套接字对象
ta_info.append("客户端连接成功。" + socket + "\n");
new ServerThread(socket).start();// 创建并启动线程对象
}
} catch (IOException e) {
e.printStackTrace();
}
}
class ServerThread extends Thread {
Socket socket;
public ServerThread(Socket socket) {
this.socket = socket;
}
public void run() {
try {
BufferedReader in = new BufferedReader(new InputStreamReader(
socket.getInputStream()));// 创建输入流对象
while (true) {
String info = in.readLine();// 读取信息
String key = "";
if (info.startsWith("用户：")) {// 添加登录用户到客户端列表
key = info.substring(3, info.length());// 获得用户名并作为键使用
map.put(key, socket);// 添加键值对
Set<String> set = map.keySet();// 获得集合中所有键的Set视图
Iterator<String> keyIt = set.iterator();// 获得所有键的迭代器
while (keyIt.hasNext()) {
String receiveKey = keyIt.next();// 获得表示接收信息的键
Socket s = map.get(receiveKey);// 获得与该键对应的套接字对象
PrintWriter out = new PrintWriter(s
.getOutputStream(), true);// 创建输出流对象
Iterator<String> keyIt1 = set.iterator();// 获得所有键的迭代器
while (keyIt1.hasNext()) {
String receiveKey1 = keyIt1.next();// 获得键，用于向客户端添加用户列表
out.println(receiveKey1);// 发送信息
out.flush();// 刷新输出缓冲区
}
}
} else {// 转发接收的消息
key = info.substring(info.indexOf("：发送给：") + 5, info
.indexOf("：的信息是："));// 获得接收方的key值,即接收方的用户名
String sendUser = info.substring(0, info
.indexOf("：发送给："));// 获得发送方的key值,即发送方的用户名
Set<String> set = map.keySet();// 获得集合中所有键的Set视图
Iterator<String> keyIt = set.iterator();// 获得所有键的迭代器
while (keyIt.hasNext()) {
String receiveKey = keyIt.next();// 获得表示接收信息的键
if (key.equals(receiveKey)
&& !sendUser.equals(receiveKey)) {// 如果是发送方，但不是用户本身
Socket s = map.get(receiveKey);// 获得与该键对应的套接字对象
PrintWriter out = new PrintWriter(s
.getOutputStream(), true);// 创建输出流对象
out.println("MSG:"+info);// 发送信息
out.flush();// 刷新输出缓冲区
}
}
}
}
} catch (IOException e) {
ta_info.append(socket + "已经退出。\n");
}
}
}
public static void main(String args[]) {
fuwumianban frame = new fuwumianban();
frame.setVisible(true);
frame.createSocket();
}
public fuwumianban() {
super();
setTitle("多个用户聊天");
setBounds(100, 100, 385, 266);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JScrollPane scrollPane = new JScrollPane();
getContentPane().add(scrollPane, BorderLayout.CENTER);
ta_info = new JTextArea();
scrollPane.setViewportView(ta_info);
}
}
客户界面
package yiduiy;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import javax.swing.DefaultComboBoxModel;
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;
public class kehu extends JFrame {
private JTextField tf_newUser;
private JList user_list;
private JTextArea ta_info;
private JTextField tf_send;
PrintWriter out;// 声明输出流对象
private boolean loginFlag = false;// 为true时表示已经登录，为false时表示未登录
/**
* Launch the application
*
* @param args
*/
public static void main(String args[]) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
kehu frame = new kehu();
frame.setVisible(true);
frame.createClientSocket();// 调用方法创建套接字对象
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public void createClientSocket() {
try {
Socket socket = new Socket("127.0.0.1", 1978);// 创建套接字对象
out = new PrintWriter(socket.getOutputStream(), true);// 创建输出流对象
new ClientThread(socket).start();// 创建并启动线程对象
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
class ClientThread extends Thread {
Socket socket;
public ClientThread(Socket socket) {
this.socket = socket;
}
public void run() {
try {
BufferedReader in = new BufferedReader(new InputStreamReader(
socket.getInputStream()));// 创建输入流对象
DefaultComboBoxModel model = (DefaultComboBoxModel) user_list
.getModel();// 获得列表框的模型
while (true) {
String info = in.readLine().trim();// 读取信息
if (!info.startsWith("MSG:")) {
boolean itemFlag = false;// 标记是否为列表框添加列表项，为true不添加，为false添加
for (int i = 0; i < model.getSize(); i++) {
if (info.equals((String) model.getElementAt(i))) {
itemFlag = true;
}
}
if (!itemFlag) {
model.addElement(info);// 添加列表项
} else {
itemFlag = false;
}
} else {
ta_info.append(info + "\n");// 在文本域中显示信息
if (info.equals("88")) {
break;// 结束线程
}
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
private void send() {
if (!loginFlag) {
JOptionPane.showMessageDialog(null, "请先登录。");
return;
}
String sendUserName = tf_newUser.getText().trim();
String info = tf_send.getText();// 获得输入的信息
if (info.equals("")) {
return;// 如果没输入信息则返回，即不发送
}
String receiveUserName = (String) user_list.getSelectedValue();// 获得接收信息的用户
String msg = sendUserName + "：发送给：" + receiveUserName + "：的信息是： "
+ info;// 定义发送的信息
if (info.equals("88")) {
System.exit(0);// 如果没输入信息是88，则退出
}
out.println(msg);// 发送信息
out.flush();// 刷新输出缓冲区
tf_send.setText(null);// 清空文本框
}
/**
* Create the frame
*/
public kehu() {
super();
setTitle("多个用户聊天");
setBounds(100, 100, 385, 288);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JPanel panel = new JPanel();
getContentPane().add(panel, BorderLayout.SOUTH);
final JLabel label = new JLabel();
label.setText("输入聊天内容：");
panel.add(label);
tf_send = new JTextField();
tf_send.addActionListener(new ActionListener() {
public void actionPerformed(final ActionEvent e) {
send();// 调用方法发送信息
}
});
tf_send.setPreferredSize(new Dimension(180, 25));
panel.add(tf_send);
final JButton button = new JButton();
button.addActionListener(new ActionListener() {
public void actionPerformed(final ActionEvent e) {
send();// 调用方法发送信息
}
});
button.setText("发 送");
panel.add(button);
final JSplitPane splitPane = new JSplitPane();
splitPane.setDividerLocation(100);
getContentPane().add(splitPane, BorderLayout.CENTER);
final JScrollPane scrollPane = new JScrollPane();
splitPane.setRightComponent(scrollPane);
ta_info = new JTextArea();
scrollPane.setViewportView(ta_info);
final JScrollPane scrollPane_1 = new JScrollPane();
splitPane.setLeftComponent(scrollPane_1);
user_list = new JList();
user_list.setModel(new DefaultComboBoxModel(new String[] { "" }));
scrollPane_1.setViewportView(user_list);
final JPanel panel_1 = new JPanel();
getContentPane().add(panel_1, BorderLayout.NORTH);
final JLabel label_1 = new JLabel();
label_1.setText("输入用户名称：");
panel_1.add(label_1);
tf_newUser = new JTextField();
tf_newUser.setPreferredSize(new Dimension(180, 25));
panel_1.add(tf_newUser);
final JButton button_1 = new JButton();
button_1.addActionListener(new ActionListener() {
public void actionPerformed(final ActionEvent e) {
if (loginFlag) {
JOptionPane.showMessageDialog(null, "在同一窗口只能登录一次。");
return;
}
String userName = tf_newUser.getText().trim();// 获得登录用户名
out.println("用户：" + userName);// 发送登录用户的名称
out.flush();// 刷新输出缓冲区
tf_newUser.setEnabled(false);
loginFlag = true;
}
});
button_1.setText("登 录");
panel_1.add(button_1);
}
}
