Cannot evaluate com.sun.proxy.$Proxy5.toString()

Question

 

手写spring框架的时候，在JdkDynamicAopProxy的时候报了Method threw 'java.lang.ClassCastException' exception. Cannot evaluate com.sun.proxy.$Proxy5.toString()

在我执行完这一行的时候报了上面的错误

Answer 1

package com.john.mvcframework.aop;

import com.john.mvcframework.aop.intercept.JMethodInvocation;
import com.john.mvcframework.aop.support.JAdvisedSupport;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.List;

/**
 * @author : yumin
 * @date : 2021-04-20 20:51
 **/
public class JJdkDynamicAopProxy implements JAopProxy, InvocationHandler {

    //AdvisedSupport中保存着aop的配置信息以及代理对象的信息
    private JAdvisedSupport advised;

    public JJdkDynamicAopProxy(JAdvisedSupport advised) {
        this.advised = advised;
    }

    @Override
    public Object getProxy() {
        return getProxy(this.getClass().getClassLoader());
    }

    @Override
    public Object getProxy(ClassLoader classLoader) {
        return Proxy.newProxyInstance(classLoader, this.advised.getTargetClass().getInterfaces(), this);
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        List<Object> chain = this.advised.getInterceptorsAndDynamicInterceptionAdvice(method, this.advised.getTargetClass());

        JMethodInvocation mi = new JMethodInvocation(proxy, this.advised.getTarget(), method, args, this.advised.getTargetClass(), chain);
        return mi;
    }

}