java删除文件或文件夹及子文件夹

public class Test {
    
    public static void deleteFile(File file) {
        if (file.exists()) {
            if (file.isFile()) {
                file.delete();
            }
            else if (file.isDirectory()) {
                deleteDirectory(file);
            }
        }
    }
    
    private static void deleteDirectory(File file) {
        File files[] = file.listFiles();
        for (int i = 0; i < files.length; i++) {
            if (files[i].isFile()) {
                files[i].delete();
            }
            else if (files[i].isDirectory()) {
                deleteDirectory(files[i]);
            }
        }
        file.delete();
    }
    
    /** <一句话功能简述>
     * @param args
     */
    public static void main(String[] args) {
        deleteFile(new File("d:\\//tmp/"));
    }
}