当PDF是url时下载它

import requests

url = "https://example.com/sample.pdf"
response = requests.get(url)

if response.status_code == 200:
    with open("sample.pdf", "wb") as file:
        file.write(response.content)
        print("PDF文件下载成功！")
else:
    print("下载PDF文件失败！")

import java.io.BufferedInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;

public class PDFDownloader {
    public static void main(String[] args) {
        String url = "https://example.com/sample.pdf";
        try {
            URL pdfUrl = new URL(url);
            URLConnection connection = pdfUrl.openConnection();
            connection.connect();

            BufferedInputStream inputStream = new BufferedInputStream(connection.getInputStream());
            FileOutputStream fileOutputStream = new FileOutputStream("sample.pdf");

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

            fileOutputStream.close();
            inputStream.close();
            System.out.println("PDF文件下载成功！");
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("下载PDF文件失败！");
        }
    }
}