编写一个 Java 应用程序，实现图形界面多人聊天室（多线程实现），要求聊天室窗口标题是 “欢迎使用 XXX 聊天室应用”，其中 XXX 是自己的班级姓名学号，如“软件 171 张三 1234”。
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import java.io.*;
class Login extends JFrame implements ActionListener{
//用户名
JPanel jp1=new JPanel();
JLabel jl1=new JLabel("用户名");
public JTextField jtf1=new JTextField(15);
//密码
JPanel jp2=new JPanel();
JLabel jl2=new JLabel("密码");
JPasswordField jpf2 = new JPasswordField(15);
//登入取消按钮
JPanel jp3=new JPanel();
JButton jbt1=new JButton("登入");
JButton jbt2=new JButton("取消");
public Login() {
// TODO 自动生成的构造函数存根
this.setTitle("客服端登入窗口");
Container con =this.getContentPane();
con.setLayout(new FlowLayout());
//用户名
jp1.add(jl1);
jp1.add(jtf1);
jtf1.addActionListener(this);
//密码
jpf2.setEchoChar('*'); //用*显示密码框输入的数据
jp2.add(jl2);
jp2.add(jpf2);
jpf2.addActionListener(this);
//登入取消按钮
jp3.add(jbt1);
jp3.add(jbt2);
//添加到当前窗口容器
con.add(jp1);
con.add(jp2);
con.add(jp3);
this.setSize(500, 300); //设置窗体大小
setLocationRelativeTo(null); //设置窗口居中
this.setResizable(false); //窗体大小设置为不可改
this.setVisible(true); //窗体设置为可见
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//光标聚焦在用户框中
jtf1.requestFocus();
//为登入按钮添加监听器
jbt1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO 自动生成的方法存根
String name=jtf1.getText();
String password=new String(jpf2.getPassword()); //获取密码框中的密码
try {
if(password.equals("123")) {
setVisible(false);
new Client(jtf1.getText());
}
else {
JOptionPane.showConfirmDialog(null, "用户名或密码错误！",
"提示",JOptionPane.DEFAULT_OPTION);
}
} catch (Exception e2) {
// TODO: handle exception
e2.printStackTrace();
}
}
});
jbt2.addActionListener(new ActionListener() { //为取消按钮添加监听器
@Override
public void actionPerformed(ActionEvent e) {
// TODO 自动生成的方法存根
try {
setVisible(false);
} catch (Exception e2) {
// TODO: handle exception
}
}
});
}
//移动光标聚集
public void actionPerformed(ActionEvent e) {
Object o=e.getSource();
if(o==jtf1) {
jpf2.requestFocus();
}
}
}
public class Client extends JFrame {
public DataOutputStream dos=null;
public DataInputStream dis=null;
public Socket s=null;
public ServerSocket sc=null;
//
public JTextArea jta=new JTextArea(10,20);
public JTextField jtf=new JTextField(20);
public JScrollPane jsp = new JScrollPane(jta);
static final String CONNSTR="127.0.0.1";
public String ClientName="";
//构造函数初始化
Client(String tClientName) throws IOException{
ClientName=tClientName;
this.setTitle("客服端："+ClientName);
jta.setEditable(false); //文本显示框不可编辑
this.add(jtf,BorderLayout.SOUTH);
this.add(jsp,BorderLayout.CENTER);
//默认的设置是超过文本框才会显示滚动条,以下设置让滚动条一直显示
jsp.setVerticalScrollBarPolicy( JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
//连接服务器
try {
s=new Socket(CONNSTR,9995);
new ThreadClient(s,this).start();
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
JOptionPane.showConfirmDialog(null, "用户连接服务器失败",
"提示",JOptionPane.DEFAULT_OPTION);
}
//发送登入信息到服务器
String firstStr="\""+ClientName+"\"："+"登入成功";
DataOutputStream firstdataOutputStream = new DataOutputStream(s.getOutputStream());
//发送用户名到服务端
firstdataOutputStream.writeUTF(firstStr);
firstdataOutputStream.flush();
//
this.setBounds(300,300,300,400);
//this.setSize(500, 300); //设置窗体大小
setLocationRelativeTo(null); //设置窗口居中
this.setVisible(true); //窗体设置为可见
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jtf.requestFocus();
//
jtf.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO 自动生成的方法存根
String str=jtf.getText();
try {
if(str.length()>0) {
str="\""+ClientName+"\"："+str;
sendMessage(str, s);
jtf.setText("");
}
} catch (Exception e2) {
// TODO: handle exception
e2.printStackTrace();
str="\""+ClientName+"\":"+"已退出";
sendMessage(str,s);
}
}
});
}
//客服端发送信息到服务器
protected void sendMessage(String message, Socket s) {
try {
DataOutputStream dos = new DataOutputStream(s.getOutputStream());
dos.writeUTF(message);
dos.flush();
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
public static void main(String[] args) {
new Login();
}
}
//定义线程类,读取服务器发送的信息
class ThreadClient extends Thread {
private Socket s;
private Client clientChat;
ThreadClient(Socket socket, Client clientChat) {
this.s = socket;
this.clientChat = clientChat;
}
@Override
public void run() {
String message;
try {
while (true) {
DataInputStream DataInputStream = new DataInputStream(s.getInputStream());
message = DataInputStream.readUTF();
clientChat.jtf.setText("");
clientChat.jta.append(message+"\n");
}
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
message="\""+clientChat.ClientName+"\":"+"已退出";
clientChat.sendMessage(message,s);
}
}
}import java.awt.BorderLayout;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;
import javax.naming.ldap.LdapName;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
public class Server extends JFrame {
//static List<Socket>ls=new ArrayList<Socket>();
//static List<String>lname=new ArrayList<String>();
public static Map<Socket,String> socketsMaps
= Collections.synchronizedMap(new HashMap<Socket,String>());
//
ServerSocket sc=null;
Socket s=null;
public JTextArea jta=new JTextArea(10,20);
public JScrollPane jsp=new JScrollPane(jta);
public String ServerName="服务器";
static int number=1;
Server() throws IOException{
super();
setTitle("服务器");
jta.setEditable(false); //文本显示框不可编辑
this.add(jsp,BorderLayout.CENTER);
//默认的设置是超过文本框才会显示滚动条,以下设置让滚动条一直显示
jsp.setVerticalScrollBarPolicy( JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
//this.add(jta,BorderLayout.CENTER); //不需要重复添加
this.setBounds(300,300,300,400);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//
}
public void init() {
int count = 0; // 记录登录到该服务器的客户端个数
try {
sc = new ServerSocket(9995); // 创建一个ServerSocket对象，端口号为1906
jta.append("服务器已启动"+'\n');
while (true) {
Socket socket=sc.accept();
new ThreadServer(socket,this).start();
}
}
catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
public static void main(String[] args) throws IOException{
new Server().init();
}
}
class ThreadServer extends Thread {
private Socket ts;
private Server tsr;
ThreadServer(){};
ThreadServer(Socket s,Server sr)
{
this.ts = s;
this.tsr=sr;
}
public void run() {
try {
while(true)
{
DataInputStream dis = new DataInputStream(ts.getInputStream());
String message=dis.readUTF();
if(message.endsWith("：登入成功")) {
message.replaceAll("：登入成功", "");
tsr.socketsMaps.put(ts,message);
}
tsr.jta.append(message+'\n');
Set<Socket> sockets = tsr.socketsMaps.keySet();
for(Socket tts : sockets) {
DataOutputStream dos = new DataOutputStream(tts.getOutputStream());
dos.writeUTF(message);
dos.flush();
}
}
}
catch (IOException e2) {
// TODO: handle exception
e2.printStackTrace();
}
}
}
