一个Scocket实例程序 _scatch源代码案例-优快云博客



import java.io.*;

import java.net.*;



public class EchoServer1

{ public static void main(String[] args )

{ try

{

ServerSocket s = new ServerSocket(8500);

Socket incoming = s.accept( );

BufferedReader in = new BufferedReader

(new InputStreamReader(incoming.getInputStream()));

PrintWriter out = new PrintWriter

(incoming.getOutputStream(), true /* autoFlush */);



out.println( "Hello! Enter BYE to exit." );



boolean done = false;

while (!done)

{ String line = in.readLine();

if (line == null) done = true;

else

{ out.println("Echo: "   line);



if (line.trim().equals("BYE"))

done = true;

}

}

incoming.close();

}

catch (Exception e)

{ System.out.println(e);

}

}

}





// EchoClient1.java

import java.io.*;

import java.net.*;



public class EchoClient1 {      

 public static void main(String args[])   {

   try{			

      if (args.length != 1){

	System.out.println("USAGE: java Client servername");				

	return;

      }	

      String  connectto= args[0];

      Socket connection;

      // connect to server

      if(connectto.equals("localhost")){

	connection=new Socket(InetAddress.getLocalHost(),8500);

      }

      else{

	connection=new Socket(InetAddress.getByName(connectto),8500);				

      }			

      BufferedReader  input=new BufferedReader(new InputStreamReader(connection.getInputStream()));                       

      PrintWriter out = new PrintWriter(connection.getOutputStream(), true /* autoFlush */);

			

      // read information from server                        

      String info;

      info = input.readLine();

      System.out.println(info);

      boolean done = false;

      BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

      String sInput;

      while(!done){

         sInput = in.readLine();

         out.println(sInput);

         if (sInput.equalsIgnoreCase("bye")) done = true;                           

         info = input.readLine();                           

         System.out.println(info);	

     }

     connection.close();                                                               

   }

   catch(SecurityException e){

     System.out.println("SecurityException when connecting Server!");		

   }		

   catch(IOException e){

     System.out.println("IOException when connecting Server!");   

   }

 }

}

运行 1 运行服务器 java EchoServer1 2 运行客户端 java EchoClient1 server_hostname