1 import java.io.*;
 2 import java.net.ServerSocket;
 3 import java.net.Socket;
 4
 5 public class Server{
 6      public static void main(String args[]){
 7            try{
 8                 //创建一个ServerSocket监听8080端口
 9         Serversocket server=new ServerSocket(8080);
10                 //等待请求
11         Socket socket=server.accept();
12             //接收到请求后使用socket进行通信
13             BufferedReader br=new BufferedReader(new InputStreamReader(socket.getInputStream()));
14         String line=br.readLine();
15         System.out.println("从客户端接收信息："+line);
16         //创建PrintWriter,用于发送数据
17         PrintWriter pw=new PrintWriter(socket.getOutputStream());
18         pw.println("发送数据："+line);
19         pw.flush();
20         pw.close();
21         br.close();
22         socket.close();
23         server.close();
24         }catch(Exception e){
25             e.printStackTrace();
26         }
27     }
28 }                    

 1 import java.io.*;
 2 import java.net.Socket;
 3
 4 public class Client{
 5     public static void main(String args[]){
 6         String msg="客户端要传的数据......";
 7         try{
 8             //创建一个Socket，和本机的8080端口连接
 9             Socket socket=new Socket("127.0.0.1",8080);
10             //使用Socket创建PrintWriter和Bufferedreader读写数据
11             PrintWriter pw=new PrintWriter(socket.getOutputStream());
12             BufferedReader bf=new BufferedReader(new InputStreamReader(socket.getInputStream()));
13             //发送数据
14             pw.println(msg);
15             pw.flush();
16             //接收数据
17             String line=br.readLine();
18             System.out.println("从服务端接收数据："+line);
19             //关闭资源
20             pw.close();
21             br.close();
22             socket.close();
23         }catch(Exception e){
24                 e.printStackTrace();
25         }
26     }
27 }