Java中删除文件、删除目录及目录下所有文件

    public void deleteAllFilesOfDir(File path) {  
        if (!path.exists())  
            return;  
        if (path.isFile()) {  
            path.delete();  
            return;  
        }  
        File[] files = path.listFiles();  
        for (int i = 0; i < files.length; i++) {  
            deleteAllFilesOfDir(files[i]);  
        }  
        path.delete();  
    }