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。


[解决办法]
新旧Byte对象的hashcode不一样
[解决办法]
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;}