java之扫描包里面的class文件

/**     * 提供直接调用的方法     * @param packageName     * @return     * @throws IOException     * @throws ClassNotFoundException     */    public static  List<Class> findClass(String packageName) throws IOException, ClassNotFoundException {        return findClass(packageName, new ArrayList<>());    }    /**     *     * @param packageName     * @param clazzs     * @return     * @throws ClassNotFoundException     * @throws IOException     */    private static List<Class> findClass(String packageName, List<Class> clazzs) throws ClassNotFoundException, IOException {        //将报名替换成目录        String fileName = packageName.replaceAll("\.", "/");        //通过classloader来获取文件列表        File file = new File(Thread.currentThread().getContextClassLoader().getResource(fileName).getFile());        File[] files = file.listFiles();        for (File f:files) {            //如果是目录，这进一个寻找            if (f.isDirectory()) {                //截取路径最后的文件夹名                String currentPathName = f.getAbsolutePath().substring(f.getAbsolutePath().lastIndexOf(File.separator)+1);                //进一步寻找                findClass(packageName+"."+currentPathName, clazzs);            } else {                //如果是class文件                if (f.getName().endsWith(".class")) {                    //反射出实例                    Class clazz = Thread.currentThread().getContextClassLoader().loadClass(packageName+"."+f.getName().replace(".class",""));                    clazzs.add(clazz);                }            }        }        return clazzs;}

public static void main(String[] args) throws IOException, ClassNotFoundException {        List<Class> clazzs = findClass("com.pinnet");        System.out.println(clazzs);}