Java删除目錄及目錄下所有檔案、檔案夾(非遞歸)

方法一:

public static void deleteFiles(File srcFile) {

        if (srcFile.exists()) {

            //存放檔案夾
            LinkedList<File> directories = new LinkedList<>();
            ArrayList<File> directoryList = new ArrayList<>();

            if (srcFile.isDirectory()) {
                directories.add(srcFile);
            } else {
                srcFile.delete();
            }

            while (directories.size() > 0) {

                File[] files = directories.removeFirst().listFiles();

                if (files != null) {
                    for (File f : files) {
                        if (f.isDirectory()) {
                            directories.add(f);
                            directoryList.add(f);
                        } else {
                            f.delete();
                        }
                    }
                }
            }

            //這時所有非檔案夾都删光了，可以直接删檔案夾了(注意從後往前周遊)
            for (int j = directoryList.size() - 1; j >= 0; j--) {
                directoryList.get(j).delete();
            }
        }
    }
           

方法二: 用do…while循環

public static void deleteFiles(File srcFile) {

        if (srcFile.exists()) {

            //存放檔案夾
            LinkedList<File> directories = new LinkedList<>();
            ArrayList<File> directoryList = new ArrayList<>();

            do {
                File[] files = directories.size() > 0 ? directories.removeFirst().listFiles() : new File[]{srcFile};
                if (files != null) {
                    for (File f : files) {
                        if (f.isDirectory()) {
                            directories.add(f);
                            directoryList.add(f);
                        } else {
                            f.delete();
                        }
                    }
                }
            } while (directories.size() > 0);

            //這時所有非檔案夾都删光了，可以直接删檔案夾了(注意從後往前周遊)
            for (int i = directoryList.size() - 1; i >= 0; i--) {
                directoryList.get(i).delete();
            }
        }
    }