如何在InputStream中加密excel并写入OutputStream？

import org.apache.poi.EncryptedDocumentException;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.crypt.EncryptionInfo;
import org.apache.poi.poifs.crypt.Encryptor;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;

import java.io.*;

public class ExcelEncryptionExample {
    public static void main(String[] args) {
        try {
            // 1. 创建InputStream对象
            InputStream inputStream = new FileInputStream("input.xls");

            // 2. 创建Workbook对象
            Workbook workbook = WorkbookFactory.create(inputStream);

            // 3. 对Excel文件进行加密处理
            EncryptionInfo encryptionInfo = new EncryptionInfo(EncryptionInfo.EncryptionMode.standard);
            Encryptor encryptor = encryptionInfo.getEncryptor();
            encryptor.confirmPassword("password");

            // 4. 创建OutputStream对象
            OutputStream outputStream = new FileOutputStream("output.xls");

            // 5. 将加密后的Workbook对象写入OutputStream中
            workbook.write(outputStream);

            // 关闭流
            outputStream.close();
            inputStream.close();

            System.out.println("Excel加密完成！");
        } catch (IOException | EncryptedDocumentException e) {
            e.printStackTrace();
        }
    }
}