从java中删除文件夹

问题描述

在Java中，我想删除包含文件和文件夹的文件夹中存在的所有内容。

  public void startDeleting（String path）{
列表< String> filesList = new ArrayList< String>（）; 
列表< String> folderList = new ArrayList< String>（）; 
 fetchCompleteList（filesList，folderList，path）; 
 for（String filePath：filesList）{
文件tempFile = new File（filePath）; 
 tempFile.delete（）; 
} 
 for（String filePath：folderList）{
文件tempFile = new File（filePath）; 
 tempFile.delete（）; 
} 
} 
 
 private void fetchCompleteList（List< String> filesList，
 List< String> folderList，String path）{
文件文件= new文件路径）; 
文件[] listOfFile = file.listFiles（）; 
 for（File tempFile：listOfFile）{
 if（tempFile.isDirectory（））{
 folderList.add（tempFile.getAbsolutePath（））; 
 fetchCompleteList（filesList，
 folderList，tempFile.getAbsolutePath（））; 
} else {
 filesList.add（tempFile.getAbsolutePath（））; 
} 
 
} 
 
} 
  

这段代码不起作用，最好的方法是什么？

解决方案

如果你使用它是一个单行：

  FileUtils.deleteDirectory（DIR）; 
  

请参阅

---

这几个版本以前从Guava中删除。 >

---

虽然上面的版本很简单，但它也是非常危险的，因为它没有告诉你很多假设。所以虽然在大多数情况下可能是安全的，但我更喜欢官方方式（Java 7）：

  public static void deleteFileOrFolder（final Path path）throws IOException {
 Files.walkFileTree（path，new SimpleFileVisitor< Path>（）{
 @Override public FileVisitResult visitFile（final Path file，final BasicFileAttributes attrs）
 throws IOException {
 Files.delete（file）; 
 return CONTINUE; 
} 
 
 @Override public FileVisitResult visitFileFailed（final Path file，final IOException e） {
 return handleException（e）; 
} 
 
 private FileVisitResult handleException（final IOException e）{
 e.printStackTrace（）; //替换更强大的错误处理
返回TERMINATE; 
} 
 
 @Override public FileVisitResult postVisitDirectory（final Path dir，final IOException e）
 throws IOException {
 if（e！ = null）return handleException（e）; 
 Files.delete（dir）; 
返回CONTINUE; 
} 
}）; 
}; 
  

In Java, I want to delete all the contents that are present in a folder which includes files and folders.

public void startDeleting(String path) {
        List<String> filesList = new ArrayList<String>();
        List<String> folderList = new ArrayList<String>();
        fetchCompleteList(filesList, folderList, path);
        for(String filePath : filesList) {
            File tempFile = new File(filePath);
            tempFile.delete();
        }
        for(String filePath : folderList) {
            File tempFile = new File(filePath);
            tempFile.delete();
        }
    }

private void fetchCompleteList(List<String> filesList,
    List<String> folderList, String path) {
    File file = new File(path);
    File[] listOfFile = file.listFiles();
    for(File tempFile : listOfFile) {
        if(tempFile.isDirectory()) {
            folderList.add(tempFile.getAbsolutePath());
            fetchCompleteList(filesList,
                folderList, tempFile.getAbsolutePath());
        } else {
            filesList.add(tempFile.getAbsolutePath());
        }

    }

}

This code does not work, what is the best way to do this?

解决方案

If you use Apache Commons IO it's a one-liner:

FileUtils.deleteDirectory(dir);

See FileUtils.deleteDirectory()

---

This has been removed from Guava several releases ago.

---

While the above version is very simple, it is also pretty dangerous, as it makes a lot of assumptions without telling you. So while it may be safe in most cases, I prefer the "official way" to do it (since Java 7):

public static void deleteFileOrFolder(final Path path) throws IOException {
  Files.walkFileTree(path, new SimpleFileVisitor<Path>(){
    @Override public FileVisitResult visitFile(final Path file, final BasicFileAttributes attrs)
      throws IOException {
      Files.delete(file);
      return CONTINUE;
    }

    @Override public FileVisitResult visitFileFailed(final Path file, final IOException e) {
      return handleException(e);
    }

    private FileVisitResult handleException(final IOException e) {
      e.printStackTrace(); // replace with more robust error handling
      return TERMINATE;
    }

    @Override public FileVisitResult postVisitDirectory(final Path dir, final IOException e)
      throws IOException {
      if(e!=null)return handleException(e);
      Files.delete(dir);
      return CONTINUE;
    }
  });
};

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