我已经检查了所有的在线和stackoverflow，找不到特定于此问题的匹配项。我正在尝试提取位于zip文件中的pdf文件，该文件位于zip文件内部（嵌套的压缩）。重新调用我用来提取的方法不起作用，也不改变整个程序接受输入流，而不是我下面这样做。我得到java.io.IOException: Stream Closed。我的代码如下所示，错误行用错误消息指示。

public static void main(String[] args)
    {
        try
        {
            //Paths
            String basePath = "C:\\Users\\user\\Desktop\\Scan\\";
            File lookupDir = new File(basePath + "Data\\");
            String doneFolder = basePath + "DoneUnzipping\\";       
            
            File[] directoryListing = lookupDir.listFiles();
                
            for (int i = 0; i < directoryListing.length; i++) 
            {
                if (directoryListing[i].isFile()) //there's definately a file
                {
                    //Save the current file's path
                    String pathOrigFile = directoryListing[i].getAbsolutePath();
                    Path origFileDone = Paths.get(pathOrigFile);
                    Path newFileDone = Paths.get(doneFolder + directoryListing[i].getName());
                            
                    //unzip it
                    if(directoryListing[i].getName().toUpperCase().endsWith(ZIP_EXTENSION)) //ZIP files
                    {
                        unzip(directoryListing[i].getAbsolutePath(), DESTINATION_DIRECTORY + directoryListing[i].getName());
                            
                        //move to the 'DoneUnzipping' folder
                        Files.move(origFileDone, newFileDone);                            
                        }
                    } 
            }
        } catch (Exception e)
        {
            e.printStackTrace(System.out);
        }
    }
            
    private static void unzip(String zipFilePath, String destDir) 
    {        
        //buffer for read and write data to file
        byte[] buffer = new byte[BUFFER_SIZE];
        
        try {
                FileInputStream fis = new FileInputStream(zipFilePath);
                ZipInputStream zis = new ZipInputStream(fis);
                ZipEntry ze = zis.getNextEntry();
                
                while(ze != null)
                {
                    String fileName = ze.getName();
                    int index = fileName.lastIndexOf("/");
                    String newFileName = fileName.substring(index + 1);
                    File newFile = new File(destDir + File.separator + newFileName);
                    
                    //Zips inside zips  
                    if(fileName.toUpperCase().endsWith(ZIP_EXTENSION))
                    {                      
                        try(ZipInputStream innerZip = new ZipInputStream(fis)) 
                            {
                                ZipEntry innerEntry = null;
                                while((innerEntry = innerZip.getNextEntry()) != null) 
                                {
                                    System.out.println("The file: " + fileName);
                                    if(fileName.toUpperCase().endsWith("PDF")) 
                                    {
                                        FileOutputStream fos = new FileOutputStream(newFile);
                                        int len;
                                        while ((len = zis.read(buffer)) > 0) 
                                        {
                                            fos.write(buffer, 0, len);
                                        }
                                        fos.close();
                                    }
                                }
                            }

                    }
                    
                //close this ZipEntry
                zis.closeEntry(); // java.io.IOException: Stream Closed
                ze = zis.getNextEntry();                       
                
                }  
            
            //close last ZipEntry
            zis.close();
            fis.close();
        } catch (IOException e) 
        {
            e.printStackTrace();
        }
        
    }