本文实例为大家分享了java网络编程之群聊功能的具体代码，供大家参考，具体内容如下
1、服务端
package networkCoding;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.concurrent.CopyOnWriteArrayList;
public class WeiHuShanChatRoomServer {
private static CopyOnWriteArrayList<Chat> all= new CopyOnWriteArrayList<Chat>();
public static void main(String[] args) throws IOException {
System.out.println("-----server");
// 1, 指定端口，使用serverSocket创建服务器
ServerSocket server= new ServerSocket(9999);
// 2, 阻塞式等待连接accept
while(true) {
Socket client=server.accept();
Chat chat= new Chat(client);
// 交给容器管理
all.add(chat);
new Thread(chat) .start();
}
}
static class Chat implements Runnable{
private DataOutputStream dos;
private DataInputStream dis;
private Socket client;
private boolean isRuning;
private String name;
public Chat(Socket client) {
this.client=client;
this.isRuning=true;
try {
this.dis = new DataInputStream(client.getInputStream());
this.dos=new DataOutputStream(client.getOutputStream());
this.name=receive();
this.send(this.name+",威虎山欢迎你的到来");
this.sendOthers(this.name+"来到了威虎山",true);
} catch (IOException e) {
// 出错释放资源
System.out.println("===1==");
this.release();
}
}
private String receive() {
String data="";
try {
data= dis.readUTF();
} catch (IOException e) {
System.out.println("===2==");
//this.release();
}
return data;
}
// 群聊
private void send(String data) {
try {
dos.writeUTF(data);
dos.flush();
} catch (IOException e) {
System.out.println("===3==");
this.release();
}
}
private void sendOthers(String data,boolean isSys) {
boolean isPrivate = data.startsWith("@");
if(isPrivate) {
int index= data.indexOf(":");
String targetName=data.substring(1,index);
String msg=data.substring(index+1);
for (Chat chat : all) {
if(chat.name.equals(targetName)) {
System.out.println("******"+chat.name+targetName);
chat.send(this.name+"悄悄对你说:"+msg);
}
}
}else {
for (Chat chat : all) {
if(chat==this) {
continue;
}else {
if(isSys) {
chat.send(data);
}else {
chat.send(this.name+"对大家说:"+data);
}
}
}
}
}
private void release() {
this.isRuning=false;
Utils.close(dis,dos,client);
all.remove(this);
sendOthers(this.name+"离开了威虎山", true);
}
@Override
public void run() {
while(isRuning) {
String data = receive();
if(!data.equals("")) {
sendOthers(data,false);
}else {
send("不能发送空消息");
}
}
}
}
}2、客户端
package networkCoding;
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
import java.net.UnknownHostException;
public class WeiHuShanChatRoomClient {
public static void main(String[] args) throws UnknownHostException, IOException {
BufferedReader bf= new BufferedReader(new InputStreamReader(System.in));
System.out.println("请输入姓名");
String bfString = bf.readLine();
//1, 建立连接，使用socket 创建客户端 + 服务端的地址端口号；
Socket client = new Socket("localhost",9999);
// 2, 操作：输入输出流操作
new Thread(new Send(client,bfString)).start();
new Thread(new Receive(client)).start();
}
}（1）发送封装类
package networkCoding;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
public class Send implements Runnable{
private BufferedReader bf;
private DataOutputStream dos;
private Socket client;
private boolean isRuning;
private String name;
public Send(Socket client,String name) {
this.client=client;
this.isRuning=true;
this.name=name;
this.bf= new BufferedReader(new InputStreamReader(System.in));
try {
this.dos=new DataOutputStream(client.getOutputStream());
this.send(name);
} catch (IOException e) {
// 出错释放资源
System.out.println("===4==");
this.release();
this.isRuning=false;
}
}
private void release() {
this.isRuning=false;
Utils.close(dos,client);
}
private void send(String data) {
try {
dos.writeUTF(data);
dos.flush();
} catch (IOException e) {
System.out.println("===5==");
this.release();
}
}
private String getString() {
String dataString ="";
try {
dataString = this.bf.readLine();
} catch (IOException e) {
System.out.println("===6==");
this.release();
}
return dataString;
}
@Override
public void run() {
// TODO Auto-generated method stub
while(isRuning) {
String data = getString();
if(!data.equals("")) {
send(data);
}else {
//send("不能发送空消息");
}
}
}
}（2）接收封装类
package networkCoding;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.Socket;
public class Receive implements Runnable {
private DataInputStream dis;
private Socket client;
private boolean isRuning;
public Receive(Socket client) {
this.client=client;
this.isRuning=true;
try {
this.dis = new DataInputStream(client.getInputStream());
} catch (IOException e) {
// 出错释放资源
System.out.println("===6==");
this.release();
this.isRuning=false;
}
}
private String receive() {
String data="";
try {
data= dis.readUTF();
} catch (IOException e) {
System.out.println("===7==");
this.release();
}
return data;
}
private void release() {
this.isRuning=false;
Utils.close(dis,client);
}
@Override
public void run() {
while(isRuning) {
String data = receive();
if(!data.equals("")) {
System.out.println(data);
}else {
}
}
}
}3、工具类
package networkCoding;
import java.io.Closeable;
import java.io.IOException;
public class Utils {
public static void main(String[] args) {
}
public static void close(Closeable...target) {
for (Closeable obj : target) {
try {
if(null!=obj) {
obj.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
