Cglib的MethodPro的invoke和invokeSuper的区别；为何invokeSuper可以内部调用方法依然能增强，为何jdk代理不能实现invokeSuper的功能

package com.shuke.cbm.admin;
 
import java.lang.reflect.Method;
 
import org.springframework.cglib.proxy.Enhancer;
import org.springframework.cglib.proxy.MethodInterceptor;
import org.springframework.cglib.proxy.MethodProxy;
public class TestApp2 {
 
    public static void main(String[] args) {
//        System.setProperty(DebuggingClassWriter.DEBUG_LOCATION_PROPERTY, "E:\api");
    	TestApp target = new TestApp();
        Enhancer e = new Enhancer();
        e.setSuperclass(TestApp.class);
        e.setCallback(new MyMethodInterceptor(target));
        TestApp t=(TestApp) e.create();
        t.a();
    }
}
 class TestApp {
    
    public void a() {
        System.out.println(" a 方法");
        b();
    }
    
    public void b() {
        System.out.println(" b 方法");
        c();
    }
    public void c() {
        System.out.println(" c 方法");
    }
}
 
 
 class MyMethodInterceptor implements MethodInterceptor{