网络图片转换成字节流

    /*** 根据地址获得数据的字节流* @param strUrl 网络连接地址* @return byte[]*/public static byte[] getImageFromNetByUrl(String strUrl){try {URL url = new URL(strUrl);HttpURLConnection conn = (HttpURLConnection) url.openConnection();conn.setRequestMethod("GET");conn.setConnectTimeout(5 * 1000);InputStream inStream = conn.getInputStream();//通过输入流获取图片数据byte[] btImg = readInputStream(inStream);//得到图片的二进制数据return btImg;} catch (Exception e) {e.printStackTrace();}return null;}/*** 从输入流中获取数据* @param inStream 输入流* @return byte[]* @throws Exception*/public static byte[] readInputStream(InputStream inStream) throws Exception{ByteArrayOutputStream outStream = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int len;while( (len=inStream.read(buffer)) != -1 ){outStream.write(buffer, 0, len);}inStream.close();return outStream.toByteArray();}