获取包中声明的所有Java类的名称

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

public class ClassScanner {

    public static void main(String[] args) {
        String packageName = "com.example.package"; // 指定包名

        List<String> classNames = getClasses(packageName);
        for (String className : classNames) {
            System.out.println(className);
        }
    }

    public static List<String> getClasses(String packageName) {
        List<String> classNames = new ArrayList<>();
        String packagePath = packageName.replace('.', '/');
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();

        try {
            Enumeration<URL> resources = classLoader.getResources(packagePath);
            while (resources.hasMoreElements()) {
                URL resource = resources.nextElement();
                File file = new File(resource.getFile());
                if (file.isDirectory()) {
                    scanClasses(classNames, packageName, file);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        return classNames;
    }

    private static void scanClasses(List<String> classNames, String packageName, File directory) {
        File[] files = directory.listFiles();
        if (files != null) {
            for (File file : files) {
                if (file.isDirectory()) {
                    scanClasses(classNames, packageName + "." + file.getName(), file);
                } else if (file.getName().endsWith(".class")) {
                    String className = packageName + "." + file.getName().substring(0, file.getName().length() - 6);
                    classNames.add(className);
                }
            }
        }
    }
}