javaSocket客户端与C服务端通信

转自：http://hi.baidu.com/ssrt_hanbing/blog/item/62e3b934598eeb82a71e1238.html
通过高低位转换。
package com.commnt;
import java.net.*;
import java.io.*;
public class Client {
public String send(String address, int port, String str) {
   OutputStream os = null;
   DataInputStream is = null;
   String look = "";
   Socket socket = null;
   try {
    socket = new Socket(address, port);
    os = socket.getOutputStream();
    byte[] phone = new byte[str.length()];
    phone = ByteUtil.StringtoBytes(phone, str);
    os.write(phone);
    os.flush();
    is = new DataInputStream(socket.getInputStream());
    byte[] phone1 = new byte[str.length()];
    is.read(phone1);
    String strBype = new String(phone1);
    look = strBype.toString();
   } catch (UnknownHostException e) {
    e.printStackTrace();
   } catch (IOException e) {
    e.printStackTrace();
   } finally {
    close(socket, is, os);
   }
   return look;
}
public void close(Socket socket, DataInputStream is, OutputStream os) {
   if (os != null)
    try {
     os.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   if (is != null)
    try {
     is.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
   if (socket != null)
    try {
     socket.close();
    } catch (IOException e) {
     e.printStackTrace();
    }
}
}
public class ByteUtil