Java通过编译文件获取项目包下的所有类

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

public class ScanPackage {
    public static List<Class<?>> getClassesByPackageName(String packageName) {
        ArrayList classes = new ArrayList();

        try {
            ClassLoader e = Thread.currentThread().getContextClassLoader();
            String path = packageName.replace('.', '/');
            Enumeration resources = e.getResources(path);
            ArrayList dirs = new ArrayList();

            while (resources.hasMoreElements()) {
                URL directory = (URL) resources.nextElement();
                dirs.add(new File(directory.getFile()));
            }

            Iterator arg6 = dirs.iterator();

            while (arg6.hasNext()) {
                File directory1 = (File) arg6.next();
                classes.addAll(findClasses(directory1, packageName));
            }
        } catch (Exception arg7) {
            arg7.printStackTrace();
        }

        return classes;
    }

    private static List<Class<?>> findClasses(File directory, String packageName) throws ClassNotFoundException {
        ArrayList classes = new ArrayList();
        if (!directory.exists()) {
            return classes;
        } else {
            File[] files = directory.listFiles();
            File[] arg6 = files;
            int arg5 = files.length;

            for (int arg4 = 0; arg4 < arg5; ++arg4) {
                File file = arg6[arg4];
                if (file.isDirectory()) {
                    assert !file.getName().contains(".");

                    classes.addAll(findClasses(file, packageName + '.' + file.getName()));
                } else if (file.getName().endsWith(".class")) {
                    classes.add(Class
                            .forName(packageName + "." + file.getName().substring(0, file.getName().length() - 6)));
                }
            }

            return classes;
        }
    }
}