serversocket和socket

public class Server {

public static void main(String[] args) {
  Socket socket=null;
  BufferedReader br=null;
  PrintWriter pw=null;
  try {
   //创建服务器,并开放3081端口
   ServerSocket server=new ServerSocket(3081);
   while(true){
    
    //监听服务器端口，一旦有数据发送过来，那么就将数据封装成socket对象
    //如果没有数据发送过来，那么这时处于线程阻塞状态，不会向下继续执行
    socket=server.accept();
    System.out.println("客户端信息："+socket.getRemoteSocketAddress());
    //从socket中得到读取流，该流中有客户端发送过来的数据
    InputStream in=socket.getInputStream();
    //InputStreamReader将字节流转化为字符流
    br=new BufferedReader(new InputStreamReader(in));
    //行读取客户端数据
    String info=br.readLine();
    System.out.println(info);
    
    
    OutputStream out=socket.getOutputStream();
    pw=new PrintWriter(out);
    pw.println("服务器说：我扁死你");
    pw.flush();
   }
   
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }finally{
   
   try {
    pw.close();
    br.close();
    socket.close();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }
  
 }
}

public class Client {

public static void main(String[] args) {
  Socket socket=null;
  PrintWriter pw=null;
  BufferedReader br=null;
  try {
   //创建socket对象，并指明服务器的IP地址和端口号
   socket=new Socket("localhost",3081);
   //得到socket发送数据的输出流
   OutputStream out=socket.getOutputStream();
   //将字节流包装成字符流
   pw=new PrintWriter(out);
   
   //向服务器发送数据
   pw.println("客户端说：建军闷烧");
   //刷新流，确保数据能写到服务器
   pw.flush();
   
   InputStream in=socket.getInputStream();
   
   br=new BufferedReader(new InputStreamReader(in));
   String info=br.readLine();
   System.out.println(info);
   
   
   
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  finally{
   try {
    pw.close();
    socket.close();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }
 }
}