Solve the problem of false Base64 character in Base64

public static InputStream base64ToInputStream(String base64) {
		ByteArrayInputStream stream = null;
		try {
			//byte[] bytes = Base64.getDecoder().decode(base64);
			byte[] bytes = Base64.getMimeDecoder().decode(base64);
			stream = new ByteArrayInputStream(bytes);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return stream;
}

Change to

byte[] bytes = Base64.getMimeDecoder().decode(base64);