代码如下：

URL[] urls = {new URL("file:D:\\test-classes\\"),};
        URLClassLoader myClassLoader = new URLClassLoader(urls);
        File classesDirectory = new File("D:\\Lab1\\classes\\net\\mooctest");
        File testClassesDirectory = new File("D:\\Lab1\\test-classes\\net\\mooctest");
        File[] classesList = classesDirectory.listFiles();
        File[] testClassesList = testClassesDirectory.listFiles();
        for (File file : testClassesList) {
            //net.mooctest is package name
            Class clazz = myClassLoader.loadClass("net.mooctest." + file.getName().split("\\.")[0]);
            Method[] declaredMethods = clazz.getDeclaredMethods();
            for (Method method : declaredMethods) {
                Test declaredAnnotation = method.getDeclaredAnnotation(Test.class);
                if (declaredAnnotation != null) {
                    System.out.println(method.getDeclaringClass() + " " + method.getName());
                }
            }
        }