java - 如何访问 Apache POI 上存储在 Sharepoint(带身份验证)上的 .xlsx 文件？

Question

1. 我在共享点上存储了一个 .xlsx 文件，需要登录才能获取/查看该 Excel 文件。
2. 我需要该文件才能对其执行一些 ApachePOI 操作
3. 如何下载该文件？

我尝试通过 InputStream 进行此操作，但我不知道如何进行身份验证，并且收到了 403 错误，这是显而易见的，因为我不提供密码/登录名(不知道如何提供)

InputStream inputStream = new URL("https://example.sharepoint.com/something/something1/file.xlsx").openStream();
Files.copy(inputStream, Paths.get("C:/file.xlsx"));

有没有一种简单的方法来访问该文件？

Answer 1

我会尝试将java.net.HttpURLConnection与java.net.Authenticator和java.net.PasswordAuthentication一起使用。

示例:

import org.apache.poi.ss.usermodel.*;

import java.io.InputStream;
import java.net.URL;
import java.net.HttpURLConnection;
import java.net.Authenticator;
import java.net.PasswordAuthentication;

class ReadExcelFromURL {

 public static void main(String[] args) throws Exception {

  Authenticator.setDefault (new Authenticator() {
   private String username = "Domain\\UserName";
   private String password = "password";
   protected PasswordAuthentication getPasswordAuthentication() {
    return new PasswordAuthentication (username, password.toCharArray());
   }
  });

  String stringURL = "https://example.sharepoint.com/something/something1/file.xlsx";

  URL url = new URL(stringURL);
  HttpURLConnection con = (HttpURLConnection)url.openConnection();

  InputStream in = con.getInputStream();
  Workbook workbook = WorkbookFactory.create(in);

  for (Sheet sheet : workbook) {
   System.out.println(sheet); // success?
  }

  workbook.close();
 }
}