java - 如何删除目录中的文件但不删除文件夹

Question

我创建了一些代码来删除文件夹中的所有文件，问题是虽然这很棒，但我希望能够删除目录中的所有文件但保持文件夹完好无损，所以我不必进入每个文件夹并删除其中的文件，这是我当前的代码:

@ViewScoped
@ManagedBean
public class Delete {

    public void DeleteFiles() throws IOException {
        System.out.println("Called deleteFiles");
        File file = new File("D:/Documents/NetBeansProjects/printing~subversion/fileupload/web/resources/pdf/up617648/");

        String[] myFiles;
        if (file.isDirectory()) {
            myFiles = file.list();
            for (int i = 0; i < myFiles.length; i++) {
                File myFile = new File(file, myFiles[i]);
                System.out.println(myFile);
                myFile.delete();
            }
            DeleteFiles2();
        }

    }
    public void DeleteFiles2() throws IOException {
        System.out.println("Called deleteFiles2");
        File file = new File("D:/Documents/NetBeansProjects/printing~subversion/fileupload/Uploaded/up617648/");

        String[] myFiles;
        if (file.isDirectory()) {
            myFiles = file.list();
            for (int i = 0; i < myFiles.length; i++) {
                File myFile = new File(file, myFiles[i]);
                System.out.println(myFile);
                myFile.delete();
            }
        }

    }
}

我如何修改我的代码来实现这个目标？

编辑:

我已将代码更改为:

@ViewScoped
@ManagedBean
public class Delete {

    public void DeleteFiles() throws IOException {
        System.out.println("Called deleteFiles");
        File file = new File("D:/Documents/NetBeansProjects/printing~subversion/fileupload/web/resources/pdf/");

        String[] myFiles;
        if (file.isDirectory()) {
            myFiles = file.list();
            for (int i = 0; i < myFiles.length; i++) {
                File myFile = new File(file, myFiles[i]);
                System.out.println(myFile);
               if (!myFile.isDirectory()) {
                    myFile.delete();
                }
            }
            DeleteFiles2();
        }

    }

虽然这确实调用了所有文件夹，但这是我的控制台:

INFO: Called deleteFiles
INFO: D:\Documents\NetBeansProjects\printing~subversion\fileupload\web\resources\pdf\cam01342
INFO: D:\Documents\NetBeansProjects\printing~subversion\fileupload\web\resources\pdf\geg00061
INFO: D:\Documents\NetBeansProjects\printing~subversion\fileupload\web\resources\pdf\null
INFO: D:\Documents\NetBeansProjects\printing~subversion\fileupload\web\resources\pdf\up617648
INFO: D:\Documents\NetBeansProjects\printing~subversion\fileupload\web\resources\pdf\up626088
INFO: Called deleteFiles2

Tt 不会删除这些文件夹中的文件，我该如何执行此操作？

编辑 3:使用递归，我现在收到堆栈溢出错误。

这是我的代码:

public void DeleteFiles() {
    File file = new File("D:/Documents/NetBeansProjects/printing~subversion/fileupload/web/resources/pdf/");
    System.out.println("Called deleteFiles");
    if (file.isDirectory()) {
        for (File f : file.listFiles()) {
            DeleteFiles();
        }
    } else {
        file.delete();
    }
}

Answer 1

为什么不直接做

if (!myFile.isDirectory()) myFile.delete();

而不是

myFile.delete();

？