如何在运行时获取项目中定义的类列表？

import java.lang.reflect.Field;
import java.lang.reflect.Method;

public class ReflectionExample {
    public static void main(String[] args) {
        try {
            Class<?> clazz = Class.forName("java.lang.String");
            System.out.println("Class Name: " + clazz.getName());

            // 获取类的所有方法
            Method[] methods = clazz.getDeclaredMethods();
            System.out.println("Methods:");
            for (Method method : methods) {
                System.out.println(method.getName());
            }

            // 获取类的所有字段
            Field[] fields = clazz.getDeclaredFields();
            System.out.println("Fields:");
            for (Field field : fields) {
                System.out.println(field.getName());
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
}

import java.util.ServiceLoader;

public class ServiceLoaderExample {
    public static void main(String[] args) {
        ServiceLoader<MyService> serviceLoader = ServiceLoader.load(MyService.class);
        for (MyService service : serviceLoader) {
            System.out.println(service.getClass().getName());
        }
    }
}

interface MyService {
}

class MyServiceImpl implements MyService {
}

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Enumeration;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

public class ClassLoaderExample {
    public static void main(String[] args) throws IOException, ClassNotFoundException {
        File jarFile = new File("path/to/your/jarfile.jar");
        URLClassLoader classLoader = new URLClassLoader(new URL[]{jarFile.toURI().toURL()});

        JarFile jar = new JarFile(jarFile);
        Enumeration<JarEntry> entries = jar.entries();
        while (entries.hasMoreElements()) {
            JarEntry entry = entries.nextElement();
            if (entry.getName().endsWith(".class")) {
                String className = entry.getName().replace("/", ".").substring(0, entry.getName().length() - 6);
                Class<?> clazz = classLoader.loadClass(className);
                System.out.println(clazz.getName());
            }
        }
    }
}