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java編程實(shí)現(xiàn)多人聊天室功能

更新時(shí)間：2022年09月15日 16:41:06 作者：奕起學(xué)習(xí)

這篇文章主要為大家詳細(xì)介紹了java編程實(shí)現(xiàn)多人聊天室功能，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了java實(shí)現(xiàn)多人聊天室的具體代碼，供大家參考，具體內(nèi)容如下

程序源代碼及運(yùn)行截圖：

server.java

//server.java
package Socket;
import java.io.BufferedReader;
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.List;
import java.util.Scanner;
public class server implements Runnable {// 服務(wù)端
  static List<Socket> socketList=new ArrayList<Socket>();
// 讀取 In
  static Socket socket = null;
  static ServerSocket serverSocket = null;
  public server() {// 構(gòu)造方法
    try {
      serverSocket = new ServerSocket(9999);
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
  public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    System.out.println("************服務(wù)端*************");
    server t = new server();
    int count = 0;
    while (true) {     
      try {
//       System.out.println("端口9999等待被連接......");
        socket = serverSocket.accept();
        count++;
        System.out.println("第" + count + "個(gè)客戶已連接");
        socketList.add(socket);
      } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
      Print p = new Print(socket);
      Thread read = new Thread(t);
      Thread print = new Thread(p);
      read.start();
      print.start();
    }
  }
  @Override
  public void run() {
    // 重寫(xiě)run方法
    try {
      Thread.sleep(1000);
      BufferedReader in = new BufferedReader(new InputStreamReader(socket
          .getInputStream()));
      while (true) {
        String jieshou = in.readLine();
        System.out.println( jieshou);
        for (int i = 0; i < socketList.size(); i++) {
          Socket socket=socketList.get(i);
          PrintWriter out = new PrintWriter(socket.getOutputStream());
          if (socket!=this.socket) {
            out.println(jieshou);
          }else{
            out.println("(你)"+jieshou);
          }
          out.flush();
        }
      }
    } catch (Exception e) {

      e.printStackTrace();
    }
  }
}
class Print implements Runnable {
  static List<Socket> socketList=new ArrayList<Socket>();
  Scanner input = new Scanner(System.in);
  public Print(Socket s) {// 構(gòu)造方法
    try {
      socketList.add(s);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
  @Override
  public void run() {
    try {
      Thread.sleep(1000);
      while (true) {
        String msg = input.next();
      for (int i = 0; i < socketList.size(); i++) {
        Socket socket=socketList.get(i);
        PrintWriter out = new PrintWriter(socket.getOutputStream());
        // System.out.println("對(duì)客戶端說(shuō)：");
        out.println("服務(wù)端說(shuō)："+msg);
        out.flush();
      }
      }
    } catch (Exception e) {
      // TODO: handle exception
      e.printStackTrace();
    }
  }
}

client.java

//client.java
package Socket;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Scanner;
public class client implements Runnable {// 客戶端
  static Socket socket = null;
  Scanner input = new Scanner(System.in);
  static String name=null;
  public static void main(String[] args) {
    int x=(int)(Math.random()*100);
    client.name="client"+x;
    System.out.println("************客戶端"+x+"*************");
    try {
      socket = new Socket("127.0.0.1", 9999);
      System.out.println("已經(jīng)連上服務(wù)器了");
    } catch (Exception e) {
      e.printStackTrace();
    }
    client t = new client();
    Read r = new Read(socket);
    Thread print = new Thread(t);
    Thread read = new Thread(r);
    print.start();
    read.start();
  }
  @Override
  public void run() {
    try {
      Thread.sleep(1000);     
      PrintWriter out = new PrintWriter(socket.getOutputStream());
      while (true) {
        String msg = input.next();
        out.println(name+"說(shuō):"+msg);
        out.flush();
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}
class Read implements Runnable {
  static Socket socket = null;
  public Read(Socket socket) {
    this.socket = socket;
  }
  @Override
  public void run() {
    try {
      Thread.sleep(1000);
      BufferedReader in = new BufferedReader(new InputStreamReader(socket
          .getInputStream()));
      while (true) {
        System.out.println( in.readLine());
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

測(cè)試數(shù)據(jù)一：

服務(wù)端程序運(yùn)行截圖：

客戶端1程序運(yùn)行截圖：

客戶端2程序運(yùn)行截圖：

由測(cè)試數(shù)據(jù)一可以看出：程序可以實(shí)現(xiàn)多人聊天，并且效果和性能還算可以。而且每個(gè)客戶端連接進(jìn)服務(wù)器時(shí)，都會(huì)隨機(jī)產(chǎn)生一個(gè)隨機(jī)數(shù)作為自身的標(biāo)志，避免通話過(guò)程中，分辨不清彼此，而導(dǎo)致交流效果不好。

測(cè)試數(shù)據(jù)二：

服務(wù)端運(yùn)行截圖：