socket(一)

 1 package 线程安全的讨论;
 2 import java.io.BufferedReader;
 3 import java.io.IOException;
 4 import java.io.InputStreamReader;
 5 import java.io.PrintStream;
 6 import java.net.ServerSocket;
 7 import java.net.Socket;
 8 
 9 public class Server {
10      public static void main(String[] args) throws IOException {
11           //创建月hi个ServerSocket，用于监听客户端Socket的连接请求
12          ServerSocket ss=new ServerSocket(3000);
13          System.out.println("服务器启动了");
14          while(true)
15          {
16              
17              Socket s=ss.accept();
18              //输出流，输出到客户端
19              PrintStream p=new PrintStream(s.getOutputStream());
20              //输入流
21              BufferedReader buf=new BufferedReader(new InputStreamReader(s.getInputStream()));
22              
23              
24              //读取服务器端的信息，并echo到客户端，以bye结束
25             System.out.println("accept"+s.getInetAddress());
26              
27             
28                while(true)
29                {
30                    String line=buf.readLine();
31                    if(line.equals("bye"))
32                    {
33                        System.out.println("good bye");
34                        break;
35                    }
36                    else
37                    {
38                        System.out.println(line);
39                    }
40                    
41                    
42                }
43          }
44           
45          
46      }
47 
48 }

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();
          }
         
     }

}