调用FileUtils.saveAndUnzipToTempDir后如何删除文件夹

Question

我正在使用FileUtils.saveAndUnzipToTempDir将文件夹/文件解压缩到临时目录，并且一旦完成浏览文件夹，便想删除该文件夹。

我没有很好的Java经验，但是我认为saveAndUnzipToTempDir进程尚未完成，并且不知道如何等待该进程完成或如何终止它：

这是我的代码：

public boolean postFile(@RequestParam String filename, @RequestParam MultipartFile file) {

  FileResultsDTO fileResultsDTO = FileUtils.saveAndUnzipToTempDir(file, filename);

  for(String fileName : fileResultsDTO.getUnzipDir().list()){
     // do something.
  }

  //Find the temp folder where the other files/folders are uploaded and 
  //deleted those
  File directory = new File(FileUtils.getTempDirectoryPath());
  FileUtils.deleteDirectory(directory);
  FileUtils.forceDelete(directory);
  delete(directory);
}


public static void delete(File file)
    throws IOException {

    if(file.isDirectory()){

        //directory is empty, then delete it
        if(file.list().length==0){

            FileDeleteStrategy.FORCE.delete(file);
            FileUtils.deleteQuietly(file);
            file.delete();
            System.out.println("Directory is deleted : "
                + file.getAbsolutePath());

        }else{

            //list all the directory contents
            String files[] = file.list();

            for (String temp : files) {
                //construct the file structure
                File fileDelete = new File(file, temp);

                //recursive delete
                delete(fileDelete);
            }

            //check the directory again, if empty then delete it
            if(file.list().length==0){
                FileDeleteStrategy.FORCE.delete(file);
                FileUtils.deleteQuietly(file);
                file.delete();
                System.out.println("Directory is deleted : "
                    + file.getAbsolutePath());
            }
        }

    }else{
        //if file, then delete it
        FileDeleteStrategy.FORCE.delete(file);
        FileUtils.deleteQuietly(file);


        file.delete();
        System.out.println("File is deleted : " + file.getAbsolutePath());
    }
}

因此，如果您仔细查看代码，则可以看到我也尝试过使用：

 FileDeleteStrategy.FORCE.delete(file);
 FileUtils.deleteQuietly(file);
 file.delete();