JAVA socket通信



这是我学SOCKET时敲得例子，非常简单，TCP协议：
客户端代码：
import java.net.*;
import java.io.*;
public class SocketClient{
public static void main(String args[]){
try{
//客户端连接服务器
      Socket socket1 = new Socket("127.0.0.1",1989);
      InputStream is = socket1.getInputStream();
      DataInputStream dis = new DataInputStream(is);
//客户端接受服务器端的信息
      System.out.println(dis.readUTF());
      dis.close();
      socket1.close();
    }
    catch(IOException e){
     System.out.println("IO异常");
     }
}
}
服务器代码：
import java.net.*;
import java.io.*;
public class SocketServer{
  public static void main(String args[]){
  try{
  ServerSocket ss = new ServerSocket(1989);
  Socket socket1 = ss.accept();
  OutputStream os = socket1.getOutputStream();
   DataOutputStream  dos = new DataOutputStream(os);
//服务器端发给客户端的信息
   dos.writeUTF("anyway,i need u！"+socket1.getInetAddress()+"port:"+socket1.getPort());
   dos.close();
   socket1.close();
    }
    catch(IOException e){
      System.out.println("IO错误!");
     }
  }
}

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public  class  Client {
    public  static  void  main(String[] args) {
        String s= null ;
        Socket mysocket;
        DataInputStream in= null ;
        DataOutputStream out= null ;
        try  {
            mysocket= new  Socket( "127.0.0.1" , 4331 );
            in= new  DataInputStream(mysocket.getInputStream());
            out= new  DataOutputStream(mysocket.getOutputStream());
            for ( int  k= 1 ;k< 100 ;k=k+ 2 ){
                out.writeUTF( "" +k);
                s=in.readUTF();
                System.out.println( "客户收到" +s);
                Thread.sleep( 500 );
            }
        }  catch  (Exception e) {
            System.out.println( "服务器已断开" +e);
        }
    }
}

public  class  Server {
    public  static  void  main(String[] args) {
        ServerSocket server= null ;
        Socket you= null ;
        String s= null ;
        DataOutputStream out= null ;
        DataInputStream in= null ;
        try  {
            server= new  ServerSocket( 4331 );
        }  catch  (Exception e) {
            System.out.println(e);
        }
        try  {
            System.out.println( "等待客户呼叫" );
            you=server.accept();
            out= new  DataOutputStream(you.getOutputStream());
            in= new  DataInputStream(you.getInputStream());
            while ( true ){
                s=in.readUTF();
                int  m=Integer.parseInt(s);
                out.writeUTF( "你好,我是服务器" );
                out.writeUTF( "你说的数乘2后是:" + 2 *m);
                System.out.println( "服务器收到:" +s);
                Thread.sleep( 500 );
            }
        }  catch  (Exception e) {
            System.out.println( "客户端已断开" +e);
        }
    }
}

很简单的服务器客户端程序