java socket编程

server端：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;


public class ServerSocketTest {

    
    public static void main(String[] args) {
        try {
            ServerSocket ss=new ServerSocket(1235);
            System.out.print("server");
            Socket socket=ss.accept();
            
            InputStream is=socket.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String info=null;
            if((info=br.readLine())!=null){
                System.out.print(info);
            }
            
            OutputStream os=socket.getOutputStream();
            String s="hello";
            os.write(s.getBytes());
            
            os.close();
            br.close();
            is.close();
            socket.close();
            ss.close();
            
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}

client端：

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;


public class SocketTest {

    
    public static void main(String[] args) {
        try {
            Socket socket=new Socket("localhost", 1235);
            System.out.println("client");
            OutputStream os=socket.getOutputStream();
            String s="123";
            os.write(s.getBytes());
            socket.shutdownOutput();
            
            InputStream is=socket.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String info=null;
            if((info=br.readLine())!=null){
                System.out.print(info);
            }
            
            br.close();
            is.close();
            os.close();
            socket.close();
            
        } catch (UnknownHostException e) {            
            e.printStackTrace();
        } catch (IOException e) {            
            e.printStackTrace();
        }

    }

}