socket(一)

package 线程安全的讨论;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
     public static void main(String[] args) throws IOException {
          //创建月hi个ServerSocket，用于监听客户端Socket的连接请求
         ServerSocket ss=new ServerSocket(3000);
         System.out.println("服务器启动了");
         while(true)
         {
             
             Socket s=ss.accept();
             //输出流，输出到客户端
             PrintStream p=new PrintStream(s.getOutputStream());
             //输入流
             BufferedReader buf=new BufferedReader(new InputStreamReader(s.getInputStream()));
             
             
             //读取服务器端的信息，并echo到客户端，以bye结束
            System.out.println("accept"+s.getInetAddress());
             
            
               while(true)
               {
                   String line=buf.readLine();
                   if(line.equals("bye"))
                   {
                       System.out.println("good bye");
                       break;
                   }
                   else
                   {
                       System.out.println(line);
                   }
                   
                   
               }
         }
          
         
     }

}

2.客户端

package 线程安全的讨论;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
import java.util.Scanner;

public class Client {
     public static void main(String[] args) {
          try
          {
               Socket socket=new Socket("127.0.0.1",3000);
               //将socket对应的输入流包装成BufferedReader
               BufferedReader br=new BufferedReader( new InputStreamReader(System.in));
              
         
              
               
               PrintStream pt=new PrintStream(socket.getOutputStream());
              
             
               String line=null;
               while((line=br.readLine()) != null)
               {
                   pt.println(line);
                   
               }
               
               br.close();
               socket.close();

          }
          catch(IOException e)
          {
               e.printStackTrace();
          }
         
     }

}