這篇文章主要介紹“java怎么實現群聊功能”的相關知識，小編通過實際案例向大家展示操作過程，操作方法簡單快捷，實用性強，希望這篇“java怎么實現群聊功能”文章能幫助大家解決問題。
1、服務端
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; /** * * 1, 指定端口，使用serverSocket創建服務器 * 2, 阻塞式等待連接accept * 3, 操作：輸入輸出流操作 * 4, 釋放資源 * * 5,加入容器實現群聊 * * **/ 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創建服務器 ServerSocket server= new ServerSocket(9999); // 2, 阻塞式等待連接accept while(true) { Socket client=server.accept(); Chat chat= new Chat(client); // 交給容器管理 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+",威虎山歡迎你的到來"); this.sendOthers(this.name+"來到了威虎山",true); } catch (IOException e) { // 出錯釋放資源 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+"悄悄對你說:"+msg); } } }else { for (Chat chat : all) { if(chat==this) { continue; }else { if(isSys) { chat.send(data); }else { chat.send(this.name+"對大家說:"+data); } } } } } private void release() { this.isRuning=false; Utils.close(dis,dos,client); all.remove(this); sendOthers(this.name+"離開了威虎山", true); } @Override public void run() { while(isRuning) { String data = receive(); if(!data.equals("")) { sendOthers(data,false); }else { send("不能發送空消息"); } } } } }
2、客戶端
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;
/**
*
* 1, 建立連接，使用socket 創建客戶端 + 服務端的地址端口號；
* 2, 操作：輸入輸出流操作
* 3, 釋放資源
*
* **/
public class WeiHuShanChatRoomClient {
public static void main(String[] args) throws UnknownHostException, IOException {
BufferedReader bf= new BufferedReader(new InputStreamReader(System.in));
System.out.println("請輸入姓名");
String bfString = bf.readLine();
//1, 建立連接，使用socket 創建客戶端 + 服務端的地址端口號；
Socket client = new Socket("localhost",9999);
// 2, 操作：輸入輸出流操作
new Thread(new Send(client,bfString)).start();
new Thread(new Receive(client)).start();
}
}（1）發送封裝類
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) {
// 出錯釋放資源
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("不能發送空消息");
}
}
}
}（2）接收封裝類
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) {
// 出錯釋放資源
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、工具類
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();
}
}
}
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