Socket编程一

客户端启动后发给服务端一个信息，当服务端收到信息之后发给客户端一个反馈信息。。。

[b]服务端:[/b]
package com.wlh.socket;
import java.io.*; 
import java.net.*;
public class TestSockServer {
  public static void main(String[] args) {
    InputStream in = null; 
    OutputStream out = null;
    try {
      ServerSocket ss = new ServerSocket(5888);
      Socket socket = ss.accept();
      in = socket.getInputStream(); 
      out = socket.getOutputStream();
      DataOutputStream dos = new DataOutputStream(out);
      DataInputStream dis = new DataInputStream(in);
      String s = null;
      if((s=dis.readUTF())!=null) {
	      System.out.println(s);
	      System.out.println("from: "+socket.getInetAddress());
	      System.out.println("Port: "+socket.getPort());
	    }
      dos.writeUTF("客户端你好......"); 
      dis.close();
      dos.close();
      socket.close();
    } catch (IOException e) {e.printStackTrace();}
  }
}

[b]客户端:[/b]
package com.wlh.socket;
import java.net.*;
import java.io.*;
public class TestSockClient {
  public static void main(String[] args) {
    InputStream is = null; OutputStream os = null;
    try {
      Socket socket = new Socket("localhost",5888);
      is = socket.getInputStream();
      os = socket.getOutputStream();
      DataInputStream dis = new DataInputStream(is);
      DataOutputStream dos = new DataOutputStream(os);
      dos.writeUTF("服务端你好............"); 
      String s = null;
      if((s=dis.readUTF())!=null);
      	System.out.println(s); 
      dos.close();
      dis.close();
      socket.close();
    } catch (UnknownHostException e) {
       e.printStackTrace();
    } catch (IOException e) {e.printStackTrace();}
  }
}