简易聊天室java代码 简易聊天室java代码怎么写

java多人聊天一般都是怎么搭建的？

Java多人聊天可以使用Java的Socket编程实现，主要的思路是：使用服务器来维护所有客户端的连接，并将客户端之间的聊天信息进行转发。

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具体的实现步骤如下：

创建服务器端：使用ServerSocket类创建一个服务器端，并监听指定的端口，等待客户端的连接。

创建客户端：使用Socket类创建一个客户端，并连接到服务器端。

实现聊天功能：客户端和服务器端之间可以通过输入和输出流进行通信，客户端将聊天信息发送给服务器，服务器再将其转发给其他客户端。

处理异常：在实现聊天功能时，需要注意处理可能出现的异常，例如连接异常、输入输出异常等等。

一个简单的Java多人聊天程序的代码框架如下：

服务器端：

import java.io.IOException;

import java点虐 .ServerSocket;

import java点虐 .Socket;

import java.util.ArrayList;

public class ChatServer {

private ServerSocket serverSocket;

private ArrayListClientHandler clients;

public ChatServer(int port) throws IOException {

serverSocket = new ServerSocket(port);

clients = new ArrayListClientHandler();

System.out.println("服务器已启动，等待客户端连接...");

}

public void start() throws IOException {

while (true) {

Socket socket = serverSocket.accept();

ClientHandler client = new ClientHandler(socket, this);

clients.add(client);

client.start();

}

}

public void broadcast(String message) {

for (ClientHandler client : clients) {

client.sendMessage(message);

}

}

public void removeClient(ClientHandler client) {

clients.remove(client);

}

public static void main(String[] args) throws IOException {

ChatServer server = new ChatServer(12345);

server.start();

}

}

客户端：

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java点虐 .Socket;

public class ChatClient {

private Socket socket;

private BufferedReader reader;

private PrintWriter writer;

private String name;

public ChatClient(String serverAddress, int port, String name) throws IOException {

socket = new Socket(serverAddress, port);

reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));

writer = new PrintWriter(socket.getOutputStream(), true);

this.name = name;

}

public void start() throws IOException {

System.out.println("欢迎来到聊天室！");

new Thread(new IncomingMessageHandler()).start();

new Thread(new OutgoingMessageHandler()).start();

}

private class IncomingMessageHandler implements Runnable {

@Override

public void run() {

try {

while (true) {

String message = reader.readLine();

if (message == null) {

break;

}

System.out.println(message);

}

} catch (IOException e) {

e.printStackTrace();

} finally {

close();

}

}

}

private class OutgoingMessageHandler implements Runnable {

@Override

public void run() {

BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

try {

while (true) {

String message = reader.readLine();

if (message.equals("quit")) {

break;

}

writer.println(name + ": " + message);

}

} catch (IOException e) {

e.printStackTrace；

} finally {

close();

}

}

}

java实现聊天室是怎么做到的？

Java 实现聊天室可以分为以下几个步骤：

建立服务器端

首先需要建立一个服务器端，负责接收客户端的连接请求并处理客户端发送过来的消息。

建立客户端

然后需要建立客户端，客户端通过网络连接到服务器端，并向服务器端发送消息。

实现通信协议

为了实现聊天室功能，需要定义一个通信协议，规定客户端和服务器端之间的通信格式，例如消息的头部和内容等。

实现多线程处理

聊天室通常会有多个用户同时在线，因此需要使用多线程来处理多个客户端的连接请求和消息传递。

实现GUI界面（可选）

为了方便用户使用，可以实现一个GUI界面，让用户可以方便地发送和接收消息。

以下是一个简单的 Java 聊天室的代码示例：

java

Copy code

// 服务器端代码

public class Server {

public static void main(String[] args) {

try {

ServerSocket serverSocket = new ServerSocket(8888);

while (true) {

Socket socket = serverSocket.accept();

new Thread(new ServerThread(socket)).start();

}

} catch (IOException e) {

e.printStackTrace();

}

}

}

class ServerThread implements Runnable {

private Socket socket;

private BufferedReader reader;

private PrintWriter writer;

public ServerThread(Socket socket) {

this.socket = socket;

try {

reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));

writer = new PrintWriter(socket.getOutputStream());

} catch (IOException e) {

e.printStackTrace();

}

}

public void run() {

try {

String msg;

while ((msg = reader.readLine()) != null) {

// 处理客户端发送过来的消息

System.out.println("接收到消息：" + msg);

// 将消息发送给所有客户端

for (Socket s : ServerThreadList.getList()) {

if (s != socket) {

PrintWriter w = new PrintWriter(s.getOutputStream());

w.println(msg);

w.flush();

}

}

}

// 关闭连接

socket.close();

ServerThreadList.removeThread(this);

} catch (IOException e) {

e.printStackTrace();

}

}

}

class ServerThreadList {

private static List

list = new ArrayList();

public static void addThread(ServerThread thread) {

list.add(thread);

}

public static void removeThread(ServerThread thread) {

list.remove(thread);

}

public static List

getList() {

return list;

}

}

// 客户端代码

public class Client {

public static void main(String[] args) {

try {

Socket socket = new Socket("localhost", 8888);

new Thread(new ClientThread(socket)).start();

BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

PrintWriter writer = new PrintWriter(socket.getOutputStream());

while (true) {

String msg = reader.readLine();

writer.println(msg);

writer.flush();

}

} catch (IOException e) {

e.printStackTrace();

}

}

}

class ClientThread implements Runnable {

private Socket socket;

private BufferedReader reader;

public ClientThread(Socket socket) {

this.socket = socket;

try {

reader

java写一个简单的支持多人聊天的聊天室代码，不要用UI图形界面

我发现一个大虾的BLOG里有:

你自己去看一下,对不对你的胃口哦，我对JAVA不了解？

求Java Socket 聊天室代码

两个类，实现交互

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import java点虐 .ServerSocket;

import java点虐 .Socket;

public class MutiChat

{

public static void main(String[] args)

{

MutiChat mc = new MutiChat();

mc.receive().start();

mc.send().start();

}

/**

* 接收信息

*

* @return

*/

private Thread receive()

{

return new Thread()

{

public void run()

{

ServerSocket server_socket = null;

Socket sk = null;

BufferedReader in = null;

try

{

server_socket = new ServerSocket(7777);

sk = server_socket.accept();

in = new BufferedReader(new InputStreamReader(sk

.getInputStream()));

while (true)

{

String str = in.readLine();

System.out.println(str);

}

} catch (Exception e)

{

e.printStackTrace();

}

}

};

}

private Thread send()

{

return new Thread()

{

public void run()

{

Socket client_socket = null;

BufferedReader in = null;

PrintWriter out = null;

while (true)

{

try

{

client_socket = new Socket("127.0.0.1", 8888);

in = new BufferedReader(

new InputStreamReader(System.in));

out = new PrintWriter(new BufferedWriter(

new OutputStreamWriter(client_socket

.getOutputStream())), true);

while (true)

{

String str = in.readLine();

out.println(str);

}

} catch (Exception e)

{

try

{

Thread.sleep(1000);

} catch (Exception ex)

{

ex.printStackTrace();

}

}

}

}

};

}

}

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import java点虐 .ServerSocket;

import java点虐 .Socket;

public class MutiChat2

{

public static void main(String[] args)

{

MutiChat2 mc = new MutiChat2();

mc.receive().start();

mc.send().start();

}

/**

* 接收信息

*

* @return

*/

private Thread receive()

{

return new Thread()

{

public void run()

{

ServerSocket server_socket = null;

Socket sk = null;

BufferedReader in = null;

try

{

server_socket = new ServerSocket(8888);

sk = server_socket.accept();

in = new BufferedReader(new InputStreamReader(sk

.getInputStream()));

while (true)

{

String str = in.readLine();

System.out.println(str);

}

} catch (Exception e)

{

e.printStackTrace();

}

}

};

}

private Thread send()

{

return new Thread()

{

public void run()

{

Socket client_socket = null;

BufferedReader in = null;

PrintWriter out = null;

while (true)

{

try

{

client_socket = new Socket("127.0.0.1", 7777);

in = new BufferedReader(

new InputStreamReader(System.in));

out = new PrintWriter(new BufferedWriter(

new OutputStreamWriter(client_socket

.getOutputStream())), true);

while (true)

{

String str = in.readLine();

out.println(str);

}

} catch (Exception e)

{

try

{

Thread.sleep(1000);

} catch (Exception ex)

{

ex.printStackTrace();

}

}

}

}

};

}

}