Получение классов из пакета

public class ClassFinder {

 

    private static final char PKG_SEPARATOR = '.';

 

    private static final char DIR_SEPARATOR = '/';

 

    private static final String CLASS_FILE_SUFFIX = ".class";

 

    private static final String BAD_PACKAGE_ERROR = "Unable to get resources from path '%s'. Are you sure the package '%s' exists?";

 

    public static List<Class<?>> find(String scannedPackage) {

        String scannedPath = scannedPackage.replace(PKG_SEPARATOR, DIR_SEPARATOR);

        URL scannedUrl = Thread.currentThread().getContextClassLoader().getResource(scannedPath);

        if (scannedUrl == null) {

            throw new IllegalArgumentException(String.format(BAD_PACKAGE_ERROR, scannedPath, scannedPackage));

        }

        File scannedDir = new File(scannedUrl.getFile());

        List<Class<?>> classes = new ArrayList<Class<?>>();

        for (File file : scannedDir.listFiles()) {

            classes.addAll(find(file, scannedPackage));

        }

        return classes;

    }

 

    private static List<Class<?>> find(File file, String scannedPackage) {

        List<Class<?>> classes = new ArrayList<Class<?>>();

        String resource = scannedPackage + PKG_SEPARATOR + file.getName();

        if (file.isDirectory()) {

            for (File child : file.listFiles()) {

                classes.addAll(find(child, resource));

            }

        } else if (resource.endsWith(CLASS_FILE_SUFFIX)) {

            int endIndex = resource.length() - CLASS_FILE_SUFFIX.length();

            String className = resource.substring(0, endIndex);

            try {

                classes.add(Class.forName(className));

            } catch (ClassNotFoundException ignore) {

            }

        }

        return classes;

    }

 

List<Class<?>> list = ClassFinder.find("com.wdeath.game.clazz");