对象转为字节数组

public static byte[] convertToByteArray(Object obj) throws IOException {
ObjectOutputStream os = null;
ByteArrayOutputStream byteStream = new ByteArrayOutputStream(5000);
os = new ObjectOutputStream(new BufferedOutputStream(byteStream));
os.flush();
os.writeObject(obj);
os.flush();
byte[] sendBuf = byteStream.toByteArray();
os.close();
return sendBuf;
}