import java.io.ByteArrayInputStream;   
import java.io.ByteArrayOutputStream;   
import java.io.IOException;   
import java.io.ObjectInputStream;   
import java.io.ObjectOutputStream;   
 
  
public class ObjectAndByte {   
  
    /**  
     * 对象转数组  
     * @param obj  
     * @return  
     */  
    public byte[] toByteArray (Object obj) {      
        byte[] bytes = null;      
        ByteArrayOutputStream bos = new ByteArrayOutputStream();      
        try {        
            ObjectOutputStream oos = new ObjectOutputStream(bos);         
            oos.writeObject(obj);        
            oos.flush();         
            bytes = bos.toByteArray ();      
            oos.close();         
            bos.close();        
        } catch (IOException ex) {        
            ex.printStackTrace();   
        }      
        return bytes;    
    }   
       
    /**  
     * 数组转对象  
     * @param bytes  
     * @return  
     */  
    public Object toObject (byte[] bytes) {      
        Object obj = null;      
        try {        
            ByteArrayInputStream bis = new ByteArrayInputStream (bytes);        
            ObjectInputStream ois = new ObjectInputStream (bis);        
            obj = ois.readObject();      
            ois.close();   
            bis.close();   
        } catch (IOException ex) {        
            ex.printStackTrace();   
        } catch (ClassNotFoundException ex) {        
            ex.printStackTrace();   
        }      
        return obj;    
    }   
       
    
}