从URL下载pdf文件并将其保存在android (java)中的特定文件夹中

<uses-permission android:name="android.permission.INTERNET" />

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class PDFDownloader {
    public static void downloadPDF(String fileUrl, String savePath) {
        try {
            URL url = new URL(fileUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();

            if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
                InputStream inputStream = connection.getInputStream();
                File file = new File(savePath);

                FileOutputStream fileOutputStream = new FileOutputStream(file);
                byte[] buffer = new byte[1024];
                int bytesRead;
                while ((bytesRead = inputStream.read(buffer)) != -1) {
                    fileOutputStream.write(buffer, 0, bytesRead);
                }
                fileOutputStream.close();
                inputStream.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

String fileUrl = "https://example.com/example.pdf";
String savePath = "/sdcard/Documents/example.pdf";
PDFDownloader.downloadPDF(fileUrl, savePath);