Java:将URL中的pdf文件读取到applet中的Byte数组

import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

public class URLToByteArray {
    public static void main(String[] args) throws Exception {
        String pdfUrl = "https://example.com/example.pdf";
        byte[] pdfBytes = getPDFBytesFromURL(pdfUrl);
        System.out.println("PDF bytes: " + pdfBytes);
    }

    public static byte[] getPDFBytesFromURL(String pdfUrl) throws Exception {
        URL url = new URL(pdfUrl);
        URLConnection connection = url.openConnection();
        connection.connect();

        InputStream inputStream = new BufferedInputStream(connection.getInputStream());
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();

        int bytesRead;
        byte[] buffer = new byte[1024];
        while ((bytesRead = inputStream.read(buffer)) != -1) {
            byteArrayOutputStream.write(buffer, 0, bytesRead);
        }

        inputStream.close();
        byteArrayOutputStream.close();

        return byteArrayOutputStream.toByteArray();
    }
}