private static java.lang.Object ByteToObject(byte[] bytes)...{ 
        java.lang.Object obj; 
        try { 
        //bytearray to object 
        ByteArrayInputStream bi = new ByteArrayInputStream(bytes); 
        ObjectInputStream oi = new ObjectInputStream(bi); 

        obj = oi.readObject(); 

        bi.close(); 
        oi.close(); 
        } 
        catch(Exception e) ...{ 
            System.out.println("translation"+e.getMessage()); 
            e.printStackTrace(); 
        } 
        return obj; 
    } 
  
    public byte[] ObjectToByte(java.lang.Object obj) 
    ...{ 
        byte[] bytes; 
        try { 
            //object to bytearray 
            ByteArrayOutputStream bo = new ByteArrayOutputStream(); 
            ObjectOutputStream oo = new ObjectOutputStream(bo); 
            oo.writeObject(obj); 

            bytes = bo.toByteArray(); 

            bo.close(); 
            oo.close();     
        } 
        catch(Exception e) ...{}

java 类转换成byte[]与byte[]转换成java类的方法