java类对象转化为byte数组
本人有一个类
public class packhead implements Serializable
{
  byte[] from = new byte[16];
  byte[] to = new byte[16];
  int ntype;
  int nlength;
}
在socket通讯的时候这么写，但是效果却达不到，
packhead headheart = new packhead();
  String strHeadFrom = "javaserver";
  headheart.from = strHeadFrom.getBytes();
  strHeadFrom = "vcclient";
  headheart.to = strHeadFrom.getBytes();
  headheart.nlength = 40;
  headheart.ntype = 90;
   
   
   
  Byte_File_Object objto= new Byte_File_Object();
  byte[] bufobject1 = objto.getBytesFromObject(headheart);
   
  System.out.print("\n转换后的数据为" + bufobject1);
   
  packhead headto = (packhead) objto.getObjectFromBytes(bufobject1);
   
  byte[] bufobject2 = objto.getBytesFromObject(headto);
  System.out.print("\n反转回来" + bufobject2);
其中使用的转化类
class Byte_File_Object {

  public static Object getObjectFromBytes(byte[] objBytes) throws Exception {
  if (objBytes == null || objBytes.length == 0) {
  return null;
  }
  ByteArrayInputStream bi = new ByteArrayInputStream(objBytes);
  ObjectInputStream oi = new ObjectInputStream(bi);
  return oi.readObject();
  }

  public static byte[] getBytesFromObject(Serializable obj) throws Exception {
  if (obj == null) {
  return null;
  }
  ByteArrayOutputStream bo = new ByteArrayOutputStream();
  ObjectOutputStream oo = new ObjectOutputStream(bo);
  oo.writeObject(obj);
  return bo.toByteArray();
  }

}
转化后的数据发送到客户端是乱码，而且转换前后数据都不对应了。


------解决方案--------------------
新旧Byte对象的hashcode不一样
------解决方案--------------------
楼主其实不用这么麻烦。直接用ObjectOutputStream 和ObjectInputStream的readObject和writeObject方法即可。很方便
代码如下：
Client：

Java code

import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;
import java.net.Socket;

public class Client {

    public static void main(String[] args) throws Exception {
        Socket s = new Socket("localhost", 8189);
        OutputStream out = s.getOutputStream();
        ObjectOutputStream objectout = new ObjectOutputStream(out);
        packhead headheart = new packhead();
        String strHeadFrom = "javaserver";
        headheart.from = strHeadFrom.getBytes();
        strHeadFrom = "vcclient";
        headheart.to = strHeadFrom.getBytes();
        headheart.nlength = 40;
        headheart.ntype = 90;
        objectout.writeObject(headheart);
        System.out.println("发送完毕"); 
        Thread.sleep(5000);
        s.close();
    }
}

class packhead implements Serializable {
    byte[] from = new byte[16];
    byte[] to = new byte[16];
    int ntype;
    int nlength;
}