java socket实现聊天室 java实现多人聊天功能

网友投稿 580 2023-01-25


java socket实现聊天室 java实现多人聊天功能

用java socket做一个聊天室,实现多人聊天的功能。看了极客学院的视频后跟着敲的。(1DAY)

服务端:

1. 先写服务端的类MyServerSocket,里面放一个监听线程,一启动就好

2. 实现服务端监听类ServerListener.java,用accept来监听,一旦有客户端连上,生成新的socket,就新建个线程实例ChatSocket。启动线程后就把线程交给ChatManager管理

3. 在ChatSocket中实现从客户端读取内容,把读取到的内容发给集合内所有的客户端

4. ChatManager里面用vector来管理socket线程实例ChatSocket,并实现发送信息给其他的客户端

客户端:

1. 新建一个继承JFrame的MainWindow.java类,主要实现聊天窗口的UI,以及事件响应。

2. 新建StartClient.java类,把MainWindow中生成MainWindow主方法部分代码拷贝过来,这样就能在主程序中把窗体执行出来了。

3. 新建ChatManager(需要单例化的类)管理socket,实现聊天的输入输出功能。最后记得在1中新建窗口后,传一份frame的引用到ChatManager中,才能实现ChatManager对界面的显示。

工程结构如图

以下为代码

服务端:

1. 先写服务端的类MyServerSocket,里面放一个监听线程,一启动就好

package com.starnet.testserversocket.main;

public class MyServerSocket {

public static void main(String[] args) {

new ServerListener().start();

}

}

2.实现服务端监听类ServerListener.java,用accept来监听,一旦有客户端连上,生成新的socket,就新建个线程实例ChatSocket。启动线程后就把线程交给ChatManager管理

package com.starnet.testserversocket.main;

import java.io.IOException;

import java.net.ServerSocket;

import java.net.Socket;

import javax.swing.JOptionPane;

public class ServerListener extends Thread {

public void run() {

try {

ServerSocket serverSocket = new ServerSocket(23456);

while (true) {

// block

Socket socket = serverSocket.accept();

// 建立链接

JOptionPane.showMessageDialog(null, "有客户端连到本机23456端口");

//将socket传递给新的线程

ChatSocket cs= new ChatSocket(socket);

cs.start();

ChatManager.getChatManager().add(cs);

}

} catch (IOException e) {

e.printStackTrace();

}

}

}

3.在ChatSocket中实现从客户端读取内容,把读取到的内容发给集合内所有的客户端

package com.starnet.testserversocket.main;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.UnsupportedEncodingException;

import java.net.Socket;

/*每一个连上的客户端,服务器都有一个线程为之服务*/

public class ChatSocket extends Thread {

Socket socket;

public ChatSocket(Socket s) {

this.socket = s;

}

//发送数据

public void out(String out) {

try {

socket.getOutputStream().write(out.getBytes("UTF-8"));

} catch (UnsupportedEncodingException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

//服务器会不断地从客户端读取内容,把读取到的内容发给集合内所有的客户端。

public void run() {

try {

//接收数据

BufferedReader br = new BufferedReader(

new InputStreamReader(

socket.getInputStream(), "UTF-8"));

String line=null;

//发送读到的内容

while ((line = br.readLine())!=null) {

System.out.println(line);

ChatManager.getChatManager().publish(this, line);

}

br.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

4.ChatManager里面用vector来管理socket线程实例ChatSocket,并实现发送信息给其他的客户端

package com.starnet.testserversocket.main;

import java.util.Vector;

//一个聊天服务器只能有一个manager,要单例化处理

public class ChatManager {

private ChatManager(){}

private static final ChatManager CM=new ChatManager();

public static ChatManager getChatManager(){

return CM;

}

Vector vector = new Vector();

/*增加ChatSocket 实例到vector中*/

public void add(ChatSocket cs){

vector.add(cs);

}

/*发布消息给其他客户端

*ChatSocket cs: 调用publish的线程

*msg:要发送的信息 */

public void publish(ChatSocket cs, String msg){

for (int i = 0; i < vector.size(); i++) {

ChatSocket csTemp = vector.get(i);

if (!cs.equals(csTemp)) {

csTemp.out(msg+"\n");//不用发送给自己。

}

}

}

}

客户端:

1. 新建一个继承JFrame的MainWindow.java类,主要实现聊天窗口的UI,以及事件响应。

package com.starnet.javaclient.view;

import java.awt.BorderLayout;

import java.awt.EventQueue;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.border.EmptyBorder;

import javax.swing.JTextArea;

import javax.swing.GroupLayout;

import javax.swing.GroupLayout.Alignment;

import javax.swing.JTextField;

import javax.swing.JButton;

import javax.swing.LayoutStyle.ComponentPlacement;

import com.starnet.javaclient.main.ChatManager;

import com.sun.xml.internal.ws.client.SenderException;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

public class MainWindow extends JFrame {

/**

*

*/

private static final long serialVersionUID = 1L;

private JPanel contentPane;

private JTextArea txt;

private JTextField txtip;

private JTextField txtSend;

/**

* Create the frame.

*/

public MainWindow() {

setAlwaysOnTop(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setBounds(100, 100, 450, 300);

contentPane = new JPanel();

contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));

setContentPane(contentPane);

txt = new JTextArea();

txt.setText("ready...");

txtip = new JTextField();

txtip.setText("127.0.0.1");

txtip.setColumns(10);

JButton btnConnect = new JButton("connect");

btnConnect.addMouseListener(new MouseAdapter() {

@Override

public void mouseClicked(MouseEvent e) {

ChatManager.getChatManager().connect(txtip.getText());

}

});

txtSend = new JTextField();

txtSend.setText("hello");

txtSend.setColumns(10);

JButton btnSend = new JButton("send");

btnSend.addMouseListener(new MouseAdapter() {

@Override

public void mouseClicked(MouseEvent e) {

ChatManager.getChatManager().send(txtSend.getText());

appendText("我说: "+txtSend.getText());

txtSenhttp://d.setText("");

}

});

GroupLayout gl_contentPane = new GroupLayout(contentPane);

gl_contentPane.setHorizontalGroup(

gl_contentPane.createParallelGroup(Alignment.LEADING)

.addGroup(Alignment.TRAILING, gl_contentPane.createSequentialGroup()

.addGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING)

.addGroup(gl_contentPane.createSequentialGroup()

.addComponent(txtSend, GroupLayout.DEFAULT_SIZE, 325, Short.MAX_VALUE)

.addPreferredGap(ComponentPlacement.RELATED)

.addComponent(btnSend, GroupLayout.PREFERRED_SIZE, 109, GroupLayout.PREFERRED_SIZE))

.addGroup(Alignment.LEADING, gl_contentPane.createSequentialGroup()

.addComponent(txtip, GroupLayout.PREFERRED_SIZE, 294, GroupLayout.PREFERRED_SIZE)

.addPreferredGap(ComponentPlacement.RELATED)

.addComponent(btnConnect, GroupLayout.DEFAULT_SIZE, 140, Short.MAX_VALUE))

.addComponent(txt, GroupLayout.DEFAULT_SIZE, 434, Short.MAX_VALUE))

.addContainerGap())

);

gl_contentPane.setVerticalGroup(

gl_contentPane.createParallelGroup(Alignment.LEADING)

.addGroup(gl_contentPane.createSequentialGroup()

.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)

.addComponent(txtip, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)

.addComponent(btnConnect))

.addPreferredGap(ComponentPlacement.RELATED)

.addComponent(txt, GroupLayout.DEFAULT_SIZE, 198, Short.MAX_VALUE)

.addPreferredGap(ComponentPlacement.RELATED)

.addGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING)

.addComponent(btnSend)

.addComponent(txtSend, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)))

);

contentPane.setLayout(gl_contentPane);

}

/*客户端发送的内容添加到中间的txt控件中*/

public void appendText(String in) {

txt.append("\n" + in);

}

}

2.新建StartClient.java类,把MainWindow中生成MainWindow主方法部分代码拷贝过来,这样就能在主程序中把窗体执行出来了。

package com.starnet.javaclient.main;

import java.awt.EventQueue;

import com.starnet.javaclient.view.MainWindow;

public class StartClient {

public static void main(String[] args) {

/*先新建一个jframe,然后把自动生成的代码贴过来*/

EventQueue.invokeLater(new Runnable() {

public void run() {

try {

MainWindow frame = new MainWindow();

frame.setVisible(true);

//创建完这个frame以后,传一份window的引用到ChatManager去

ChatManager.getChatManager().setWindow(frame);

} catch (Exception e) {

e.printStackTrace();

}

}

});

}

}

3.新建ChatManager(需要单例化的类)管理socket,实现聊天的输入输出功能。最后记得在1中新建窗口后,传一份frame的引用到ChatMhttp://anager中,才能实现ChatManager对界面的显示。

package com.starnet.javaclient.main;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import java.net.Socket;

import java.net.UnknownHostException;

import com.starnet.javaclient.view.MainWindow;

public class ChatManager {

private ChatManager(){}

private static final ChatManager instance=new ChatManager();

public static ChatManager getChatManager(){

return instance;

}

MainWindow window;//为了能在界面上显示服务器发来的信息,就需要传一个MainWindow的引用进来

Socket socket;

private String IP;

BufferedReader bReader;

PrintWriter pWriter;

public void setWindow(MainWindow window) {

this.window = window;

window.appendText("文本框已经和chatManager绑定了");

}

public void connect(String ip) {

this.IP = ip;

new Thread(){

@Override

public void run() {

//实现网络方法

try {

socket = new Socket(IP, 23456);

//输出流

pWriter = new PrintWriter(

new OutputStreamWriter(

socket.getOutputStream()));

//输入流

bReader = new BufferedReader(

new InputStreamReader(

socket.getInputStream()));

String line = null;

//如果读取数据为空

while ((line = bReader.readLine())!=null) {

window.appendText("收到: "+line);

}

//读完数据之后要关闭

pWriter.close();

bReader.close();

pWriter = null;

bReader = null;

} catch (UnknownHostException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}.start();

}

public void send(String sendMsg){

if (pWriter!=null) {

pWriter.write(sendMsg+"\n");

pWriter.flush();

} else {

window.appendText("当前链接已经中断...");

}

}

}


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