オブジェクトとByte配列の相互変換ツールメソッド

/**
     *  byte
     * @param obj
     * @return
     */
    private byte[] ObjectToByte(Object obj) {  
        byte[] bytes = null;  
        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) {  
            System.out.println("translation" + e.getMessage());  
            e.printStackTrace();  
        }  
        return bytes;  
    } 
    
    /**
     * byte 
     * @param bytes
     * @return
     */
    private Object ByteToObject(byte[] bytes) {
        Object obj = null;
        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;
    }