远程url文件地址转成byte

public static byte[] urlTobyte(String url) throws MalformedURLException {
URL ur = new URL(url);
BufferedInputStream in = null;
ByteArrayOutputStream out = null;
try {
in = new BufferedInputStream(ur.openStream());
out = new ByteArrayOutputStream(1024);
byte[] temp = new byte[1024];
int size = 0;
while ((size = in.read(temp)) != -1) {
out.write(temp, 0, size);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
byte[] content = out.toByteArray();
return content;
}