java 返回图片流给前端

try {//filePath:图片完整路径URL urls = new URL(filePath);HttpURLConnection conn = (HttpURLConnection)urls.openConnection();conn.setRequestMethod("GET");conn.setConnectTimeout(50 * 1000);conn.setReadTimeout(50 * 1000);InputStream inStream = conn.getInputStream();ByteArrayOutputStream outStream = new ByteArrayOutputStream();byte[] buffer = new byte[2048];int len = 0;while( (len=inStream.read(buffer)) != -1 ){outStream.write(buffer, 0, len);}inStream.close();byte data[] = outStream.toByteArray();response.setContentType("image/jpg"); OutputStream os = response.getOutputStream();os.write(data);os.flush();os.close();
}catch (Exception e){e.printStackTrace();
}

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