java编程实现多人聊天室功能

本文实例为大家分享了java实现多人聊天室的具体代码，供大家参考，具体内容如下

程序源代码及运行截图：

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 {// 服务端
  static list<socket> socketlist=new arraylist<socket>();
// 读取 in
  static socket socket = null;
  static serversocket serversocket = null;
  public server() {// 构造方法
    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("************服务端*************");
    server t = new server();
    int count = 0;
    while (true) {
      try {
//       system.out.println("端口9999等待被连接......");
        socket = serversocket.accept();
        count++;
        system.out.println("第" + count + "个客户已连接");
        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() {
    // 重写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) {// 构造方法
    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("对客户端说：");
        out.println("服务端说："+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 {// 客户端
  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("************客户端"+x+"*************");
    try {
      socket = new socket("127.0.0.1", 9999);
      system.out.println("已经连上服务器了");
    } 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+"说:"+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();
    }
  }
}

测试数据一：

服务端程序运行截图：

客户端1程序运行截图：

客户端2程序运行截图：

由测试数据一可以看出：程序可以实现多人聊天，并且效果和性能还算可以。而且每个客户端连接进服务器时，都会随机产生一个随机数作为自身的标志，避免通话过程中，分辨不清彼此，而导致交流效果不好。

测试数据二：

服务端运行截图：

客户端1程序运行截图：

客户端2程序运行截图：

客户端3程序运行截图：

客户端4程序运行截图：

客户端5程序运行截图：

客户端6程序运行截图：

客户端7程序运行截图：

 客户端8程序运行截图：

客户端9程序运行截图：

客户端10程序运行截图：

测试二一共连入了10个客户端进行程序稳定性的测试，程序运行结果稳定，符合实验预期结果，充分说明了程序的鲁棒性较强。

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服务器之家。

原文链接：https://blog.csdn.net/qq_29606255/article/details/78679815