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最新推荐文章于 2021-02-26 01:04:10 发布

原创最新推荐文章于 2021-02-26 01:04:10 发布 · 631 阅读

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#java #聊天室 #socket

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本文介绍了一个基于Java实现的简单网络通信程序，包括服务器端和客户端的设计与实现。服务器能够接收多个客户端连接，并将接收到的消息广播给其他客户端；客户端则可以发送消息到服务器并接收服务器反馈的信息。

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服务器端：

import java.net.*;
import java.io.*;
import java.util.Scanner;

public class Server extends Thread
{
int port = 8888;
ServerSocket serversocket = null;
protected DataOutputStream outStream;
static Scanner sc;
//构造函数
public Server(int port){
  try{
   if(port<1024){
    System.out.println("端口号被占用！");
    return ;
   }
   this.port=port;
   serversocket = new ServerSocket(port);
  }catch (Exception e){System.out.println(e.toString());}
}

//server线程运行函数
public void run(){
  Socket socket = null;
  try{

   //循环接受客户端的信息
   while(true){
    socket = serversocket.accept(); //接受客户端的数据请求
    //System.out.println("test two connect...");
    ServerThread userThread = new ServerThread(socket);
    userThread.start();

    //发送数据线程
    Send.insert(socket);

   }
  }catch (Exception e){System.out.println(e.toString());}
  finally{
   try{
    socket.close();
    System.exit(1);
   }catch(Exception e){System.out.println(e.toString());}
  }

}

public static void main(String[] args){
//请输入服务器端口号
  sc = new Scanner(System.in);
  System.out.print("请输入端口号： ");
  int port = sc.nextInt();
  Server server = new Server(port);
  System.out.println("Start Server Thread...");
  server.start();
  while(true)
   Send.run(sc.nextLine());
}

}

//用户发送数据
class Send
{
protected static DataOutputStream outStream;

protected static int Count=0;
protected static Socket[] socket = new Socket[50];
public Send(){
}
public static void insert(Socket sock)
{
  try{
   socket[Count++]=sock;
  }catch(Exception e){System.out.println(e.toString());}
}
//输入发送给客户端的数据

public static void run(String str){
  int i=0;
  try{
   while(i<Count)
   {

    outStream = new DataOutputStream(socket[i].getOutputStream());
    //outStream = new DataOutputStream(socket.getOutputStream());
    outStream.writeUTF(str);
    i++;

   }
  }catch (Exception e){System.out.println(e.toString());}
  finally{
   try{
    //socket[i].close();
    //System.exit(1);
   }catch(Exception e){System.out.println(e.toString());}
   }
  }

public static void Run(String str,String s){
  int i=0;
  try{
   while(i<Count)
   {
    String ss=socket[i].toString();
    //System.out.println(ss+"   "+s);
    if(ss.equals(s)==false)
    {
    outStream = new DataOutputStream(socket[i].getOutputStream());
    //outStream = new DataOutputStream(socket.getOutputStream());
    outStream.writeUTF(str);

    }
    i++;
   }
  }catch (Exception e){System.out.println(e.toString());}
  finally{
   try{
    //socket[i].close();
    //System.exit(1);
   }catch(Exception e){System.out.println(e.toString());}
   }
  }

}

//接受客户端的信息的线程体
class ServerThread extends Thread
{
protected DataInputStream inStream;
protected Socket socket;

//接受数据的构造函数
public ServerThread(Socket socket){
  try{
   this.socket = socket;
   inStream = new DataInputStream(socket.getInputStream());
  }catch(Exception e){System.out.println(e.toString());}
}

//线程的执行函数
public void run(){

  try{
   while(true)
   {
    String str = null;
    str = inStream.readUTF();
    dataProcess(str);
   }
  }catch(Exception e){System.out.println(e.toString());}

}

//控制数据的输出
public void dataProcess(String message){
  try{
   System.out.println("客户端发送的信息是： " + message);
   //System.out.println(socket.toString());
   String str = socket.toString();
   Send.Run(message,str);
  }catch(Exception e){System.out.println(e.toString());}
}
}

客户端：

import java.net.*;
import java.io.*;
import java.util.Scanner;

public class Client
{
int port = 8888;
String ip = "127.0.0.1";
Socket socket = null;
protected DataOutputStream outStream;
static Scanner sc;

//构造函数
public Client(String ip,int port){
  try{
   this.port = port;
   this.ip = ip;
   this.socket = new Socket(ip,port);
   //System.out.println("Client starting ...");
   ClientThread clientthread = new ClientThread(socket);
   clientthread.start();

   //不断向服务器发送数据
   while(true){
    try{

    String str = sc.nextLine();
    //String str = "怎么搞的";
    outStream = new DataOutputStream(socket.getOutputStream());
    outStream.writeUTF(str);
    }catch(Exception e){System.out.println(e.toString());}
   }

}catch(Exception e){System.out.println(e.toString());}

}

public static void main(String[] args){

//try{
  sc = new Scanner(System.in);
  System.out.print("请输入服务器的IP: ");
  String ip1 = sc.nextLine();
  //String ip1 = "127.0.0.1";
  System.out.print("请输入端口号: ");
  int port = sc.nextInt();
  //int port = 1234;
  Client client = new Client(ip1,port);
  System.out.println("Client starting ...");
  //}catch(Exception e){System.out.println(e.toString());}
}

}

//循环接受服务器端的信息
class ClientThread extends Thread
{
protected DataInputStream inStream;
protected Socket socket;
//构造函数
public ClientThread(Socket socket){
  try{
   this.socket = socket;
   inStream = new DataInputStream(socket.getInputStream());
  }catch(Exception e){System.out.println(e.toString());}
}

//线程的运行函数
public void run(){
  try{
   while(true){
    String str = null;
    str = inStream.readUTF();
    dataprocess(str);
   }
  }catch(Exception e){System.out.println(e.toString());}
  /*finally{
   try{
    socket.close();
    System.exit(1);
   }catch (Exception e){System.out.println(e.toString());}
  }*/
}

//处理数据
public void dataprocess(String message){
  try{
    System.out.println("服务器端发过来的数据是：" + message);
  }catch(Exception e){System.out.println(e.toString());}
}

}