Java动态代理

micro_cloud_fly

已于 2022-07-08 09:49:56 修改

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分类专栏： Java 文章标签： java 开发语言

于 2022-07-08 09:45:54 首次发布

本文链接：https://blog.csdn.net/silk_java/article/details/125672171

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接口

package proxy;

/**
 * @author micro.cloud.fly
 * @date 2022/7/8 9:32 上午
 * @desc
 */
public interface Skill {
    void run();
    void bark();
}

实体类

package proxy;

/**
 * @author micro.cloud.fly
 * @date 2022/7/8 9:33 上午
 * @desc
 */
public class Dog implements Skill {
    private String name;

    public Dog(String name) {
        this.name = name;
    }

    @Override
    public void run() {
        System.out.println(this.name + " run ~~~~");
    }

    @Override
    public void bark() {
        System.out.println(name + " bark ~~~~~");
    }
}

代理类

package proxy;

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

/**
 * @author micro.cloud.fly
 * @date 2022/7/8 9:35 上午
 * @desc
 */
public class SkillProxy {

    public Dog dog;

    public SkillProxy(Dog dog) {
        this.dog = dog;
    }

    public Skill getProxy() {
        return (Skill) Proxy.newProxyInstance(dog.getClass().getClassLoader(), dog.getClass().getInterfaces(), new InvocationHandler() {
            @Override
            public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
                System.out.println("before----");
                Object response = method.invoke(dog, args);
                System.out.println("after----");
                System.out.println("return:" + response);
                return response;
            }
        });
    }
}

测试

package proxy;

/**
 * @author micro.cloud.fly
 * @date 2022/7/8 9:39 上午
 * @desc
 */
public class ProxyDemo {
    public static void main(String[] args) {
        Dog dog = new Dog("拉布拉多");
        SkillProxy sp = new SkillProxy(dog);
        Skill proxy = sp.getProxy();
        proxy.run();
        proxy.bark();
    }
}