ClassUtil.java

package com.github.coolcooldee.sloth.utils;

import com.github.coolcooldee.sloth.generate.strategy.AbstractGeneratorStrategy;
import com.github.coolcooldee.sloth.parameter.EnableSupportUserInputPatamter;
import com.github.coolcooldee.sloth.generate.strategy.GeneratorStrategy;

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

/**
 * Created by sloth on 16/6/27.
 */
public abstract class ClassUtil {

    public static List<Class<?>> getClasses(Class<?> cls) {
        String pk = cls.getPackage().getName();
        String path = pk.replace('.', '/');
        ClassLoader classloader = Thread.currentThread().getContextClassLoader();
        URL url = classloader.getResource(path);
        try {
            return getClasses(new File(url.getFile()), pk);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
        return new ArrayList<>();
    }


    public static List<Class<?>> getAllAssignedClass(Class<?> cls) {
        List<Class<?>> classes = new ArrayList<Class<?>>();
        for (Class<?> c : getClasses(cls)) {
            if (cls.isAssignableFrom(c) && !cls.equals(c)) {
                classes.add(c);
            }
        }
        return classes;
    }

    private static List<Class<?>> getClasses(File dir, String pk) throws ClassNotFoundException {
        List<Class<?>> classes = new ArrayList<Class<?>>();
        if (!dir.exists()) {
            return classes;
        }
        for (File f : dir.listFiles()) {
            if (f.isDirectory()) {
                classes.addAll(getClasses(f, pk + "." + f.getName()));
            }
            String name = f.getName();
            if (name.endsWith(".class")) {
                classes.add(Class.forName(pk + "." + name.substring(0, name.length() - 6)));
            }
        }
        return classes;
    }

    public static void main(String[] args) throws IllegalAccessException, InstantiationException {
        List<Class<?>> l =  getAllAssignedClass(AbstractGeneratorStrategy.class);
        for(Class<?> c: l){
            EnableSupportUserInputPatamter g = (EnableSupportUserInputPatamter)c.newInstance();
            System.out.println(((GeneratorStrategy)g));
        }
    }


}