代理模式和SpringAOP

SpringAOP出现背景:

基于低耦合高内聚原则，业务代码应该只是关注业务，但是像统计这个业务功能耗时，对某一个接口进行权限过滤等系统功能有时候我们也需要。这时AOP功能就应运而生，Spring怎么实现AOP功能又不影响原有业务功能？答案是Spring通过代理模式来实现。

静态代理模式：代理类通过实现跟目标类一样的接口，再把目标类方法包装就可以植入切面功能

package com.xy.aop.proxy;
public interface ToCpayment {
    void pay();
}

package com.xy.aop.proxy.impl;

import com.xy.aop.proxy.ToCpayment;

public class ToCpaymentImpl implements ToCpayment {
    @Override
    public void pay() {
        System.out.println("以用户的名义支付");
    }
}

package com.xy.aop.proxy.impl;

import com.xy.aop.proxy.ToCpayment;

public class AlipayToC implements ToCpayment {
    private ToCpayment toCpayment;
    public AlipayToC(ToCpayment toCpayment){
        this.toCpayment = toCpayment;
    }
    @Override
    public void pay() {
        beforePay();
        toCpayment.pay();
        afterPay();
    }

    private void beforePay() {
        System.out.println("支付给商家");
    }

    private void afterPay() {
        System.out.println("取款");
    }

}

package com.xy.aop.proxy;

import com.xy.aop.proxy.ToCpayment;
import com.xy.aop.proxy.chlib.AlipayMethodInterceptor;
import com.xy.aop.proxy.chlib.CglibUtil;
import com.xy.aop.proxy.impl.AlipayToC;
import com.xy.aop.proxy.impl.CommonPayment;
import com.xy.aop.proxy.impl.ToCpaymentImpl;
import com.xy.aop.proxy.jdkproxy.AlipayInvocationHandler;
import com.xy.aop.proxy.jdkproxy.JdkDynamicProxyUtil;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

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

public class ProxyDemo {
    public static void main(String[] args){
        //静态代理模式，在代码编译的时候就实现了，通过代理类实现了目标类的功能
        ToCpayment toCpayment = new AlipayToC(new ToCpaymentImpl());
        toCpayment.pay();
    }
}

"C:\Program Files\Java\jdk1.8.0_111\bin\java.exe" "-javaagent:D:\IDEA\IntelliJ IDEA Free2020.1\IntelliJ IDEA Community Edition 2020.1\lib\idea_rt.jar=53547:D:\IDEA\IntelliJ IDEA Free2020.1\IntelliJ IDEA Community Edition 2020.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_111\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\rt.jar;E:\ideaWorkspace\target\classes;C:\Users\96935\.m2\repository\org\springframework\boot\spring-boot-starter\2.2.6.RELEASE\spring-boot-starter-2.2.6.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\boot\spring-boot\2.2.6.RELEASE\spring-boot-2.2.6.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-context\5.2.5.RELEASE\spring-context-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-aop\5.2.5.RELEASE\spring-aop-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-beans\5.2.5.RELEASE\spring-beans-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-expression\5.2.5.RELEASE\spring-expression-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\2.2.6.RELEASE\spring-boot-autoconfigure-2.2.6.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\boot\spring-boot-starter-logging\2.2.6.RELEASE\spring-boot-starter-logging-2.2.6.RELEASE.jar;C:\Users\96935\.m2\repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;C:\Users\96935\.m2\repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;C:\Users\96935\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.12.1\log4j-to-slf4j-2.12.1.jar;C:\Users\96935\.m2\repository\org\apache\logging\log4j\log4j-api\2.12.1\log4j-api-2.12.1.jar;C:\Users\96935\.m2\repository\org\slf4j\jul-to-slf4j\1.7.30\jul-to-slf4j-1.7.30.jar;C:\Users\96935\.m2\repository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;C:\Users\96935\.m2\repository\org\springframework\spring-core\5.2.5.RELEASE\spring-core-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-jcl\5.2.5.RELEASE\spring-jcl-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\yaml\snakeyaml\1.25\snakeyaml-1.25.jar;C:\Users\96935\.m2\repository\org\projectlombok\lombok\1.18.12\lombok-1.18.12.jar;C:\Users\96935\.m2\repository\cglib\cglib\3.2.9\cglib-3.2.9.jar;C:\Users\96935\.m2\repository\org\ow2\asm\asm\7.0\asm-7.0.jar;C:\Users\96935\.m2\repository\org\apache\ant\ant\1.10.3\ant-1.10.3.jar;C:\Users\96935\.m2\repository\org\apache\ant\ant-launcher\1.10.3\ant-launcher-1.10.3.jar;C:\Users\96935\.m2\repository\org\slf4j\slf4j-api\1.7.30\slf4j-api-1.7.30.jar" com.xy.aop.proxy.ProxyDemo
支付给商家
以用户的名义支付
取款
Process finished with exit code 0

SpringAOP实现方式一：JDK动态代理

静态代理模式下：如果A和B都实现ToCpayment 接口的pay()方法。A.pay()和B.pay()都需要在执行前先执行beforePay()方法的话，需要再写两个类实现ToCpayment 接口（两个类的成员变量类分别为A和B）。静态代理模式明明相同的切面方法需要写两个代理类，JDK动态代理可以避免这个缺点。

package com.xy.aop.proxy;

public interface ToCpayment {
    void pay();
}

package com.xy.aop.proxy.impl;

import com.xy.aop.proxy.ToCpayment;

public class ToCpaymentImpl implements ToCpayment {
    @Override
    public void pay() {
        System.out.println("以用户的名义支付");
    }
}

package com.xy.aop.proxy.jdkproxy;

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

public class AlipayInvocationHandler implements InvocationHandler {
    private  Object targetObject;

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        beforePay();
        Object result = method.invoke(targetObject,args);
        afterPay();
        return result;
    }
    public AlipayInvocationHandler(Object targetObject){
        this.targetObject = targetObject;
    }
    private void beforePay() {
        System.out.println("支付给商家");
    }

    private void afterPay() {
        System.out.println("取款");
    }
}

package com.xy.aop.proxy.jdkproxy;

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

public class JdkDynamicProxyUtil {
    public static <T> T newProxyInstance(T targetObject, InvocationHandler handler){
        ClassLoader classLoader = targetObject.getClass().getClassLoader();
        //获取目标对象实现的所有的接口
        Class<?>[] interfaces = targetObject.getClass().getInterfaces();

        return (T)Proxy.newProxyInstance(classLoader,interfaces,handler);
    }
}

package com.xy.aop.proxy;

import com.xy.aop.proxy.ToCpayment;
import com.xy.aop.proxy.chlib.AlipayMethodInterceptor;
import com.xy.aop.proxy.chlib.CglibUtil;
import com.xy.aop.proxy.impl.AlipayToC;
import com.xy.aop.proxy.impl.CommonPayment;
import com.xy.aop.proxy.impl.ToCpaymentImpl;
import com.xy.aop.proxy.jdkproxy.AlipayInvocationHandler;
import com.xy.aop.proxy.jdkproxy.JdkDynamicProxyUtil;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

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

public class ProxyDemo {
    public static void main(String[] args){
        //静态代理模式，再代码编译的时候就实现了，通过代理类实现了目标类的功能
//        ToCpayment toCpayment = new AlipayToC(new ToCpaymentImpl());
//        toCpayment.pay();

        //jdk动态代理 生成的代理类实现跟目标类一样的接口来替换掉目标类 ToCpayment为interface
        System.out.println("****************jdk动态代理开始**********");
        ToCpayment toCpayment = new ToCpaymentImpl();
        //植入切面，AlipayInvocationHandler必须实现InvocationHandler接口
        // 相比静态代理，AlipayInvocationHandler类可以反复利用，目标类参数toCpayment为Object类型
        InvocationHandler handler = new AlipayInvocationHandler(toCpayment);
        //生成动态代理类
        ToCpayment toCProxy = JdkDynamicProxyUtil.newProxyInstance(toCpayment,handler);
        toCProxy.pay();
        System.out.println("****************jdk动态代理结束**********");
        /**
        //cglib动态代理，非sun公司写的jar CommonPayment非interface
        System.out.println("****************cglib动态代理开始**********");
        CommonPayment commonPayment = new CommonPayment();
        ///植入切面
        MethodInterceptor methodInterceptor = new AlipayMethodInterceptor();
        //生成动态代理类
        CommonPayment commonPaymentProxy = CglibUtil.CreateProxy(commonPayment,methodInterceptor);
        commonPaymentProxy.pay();
        //cglib动态代理，非sun公司写的jar ToCpayment
        ToCpayment toCpayment1 = new ToCpaymentImpl();
        //生成动态代理类
        ToCpayment toCpaymentProxy = CglibUtil.CreateProxy(toCpayment1,methodInterceptor);
        toCpaymentProxy.pay();
        System.out.println("****************cglib动态代理结束**********");
    */
    }
}

"C:\Program Files\Java\jdk1.8.0_111\bin\java.exe" "-javaagent:D:\IDEA\IntelliJ IDEA Free2020.1\IntelliJ IDEA Community Edition 2020.1\lib\idea_rt.jar=53685:D:\IDEA\IntelliJ IDEA Free2020.1\IntelliJ IDEA Community Edition 2020.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_111\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\rt.jar;E:\ideaWorkspace\target\classes;C:\Users\96935\.m2\repository\org\springframework\boot\spring-boot-starter\2.2.6.RELEASE\spring-boot-starter-2.2.6.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\boot\spring-boot\2.2.6.RELEASE\spring-boot-2.2.6.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-context\5.2.5.RELEASE\spring-context-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-aop\5.2.5.RELEASE\spring-aop-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-beans\5.2.5.RELEASE\spring-beans-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-expression\5.2.5.RELEASE\spring-expression-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\2.2.6.RELEASE\spring-boot-autoconfigure-2.2.6.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\boot\spring-boot-starter-logging\2.2.6.RELEASE\spring-boot-starter-logging-2.2.6.RELEASE.jar;C:\Users\96935\.m2\repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;C:\Users\96935\.m2\repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;C:\Users\96935\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.12.1\log4j-to-slf4j-2.12.1.jar;C:\Users\96935\.m2\repository\org\apache\logging\log4j\log4j-api\2.12.1\log4j-api-2.12.1.jar;C:\Users\96935\.m2\repository\org\slf4j\jul-to-slf4j\1.7.30\jul-to-slf4j-1.7.30.jar;C:\Users\96935\.m2\repository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;C:\Users\96935\.m2\repository\org\springframework\spring-core\5.2.5.RELEASE\spring-core-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-jcl\5.2.5.RELEASE\spring-jcl-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\yaml\snakeyaml\1.25\snakeyaml-1.25.jar;C:\Users\96935\.m2\repository\org\projectlombok\lombok\1.18.12\lombok-1.18.12.jar;C:\Users\96935\.m2\repository\cglib\cglib\3.2.9\cglib-3.2.9.jar;C:\Users\96935\.m2\repository\org\ow2\asm\asm\7.0\asm-7.0.jar;C:\Users\96935\.m2\repository\org\apache\ant\ant\1.10.3\ant-1.10.3.jar;C:\Users\96935\.m2\repository\org\apache\ant\ant-launcher\1.10.3\ant-launcher-1.10.3.jar;C:\Users\96935\.m2\repository\org\slf4j\slf4j-api\1.7.30\slf4j-api-1.7.30.jar" com.xy.aop.proxy.ProxyDemo
****************jdk动态代理开始**********
支付给商家
以用户的名义支付
取款
****************jdk动态代理结束**********

Process finished with exit code 0

SpringAOP实现方式二：cglib动态代理，非sun公司写的源代码，需要引进cglib 的jar

package com.xy.aop.proxy.chlib;

import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

import java.lang.reflect.Method;

public class AlipayMethodInterceptor implements MethodInterceptor {

    @Override
    public Object intercept(Object o, Method method, Object[] objects, MethodProxy methodProxy) throws Throwable {
        beforePay();
        Object result = methodProxy.invokeSuper(o,objects);
        afterPay();
        return result;
    }
    private void beforePay() {
        System.out.println("支付给商家");
    }

    private void afterPay() {
        System.out.println("取款");
    }
}

package com.xy.aop.proxy.chlib;

import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;

public class CglibUtil {
    public static <T> T CreateProxy(T targetObject, MethodInterceptor methodInterceptor){
       return (T)Enhancer.create(targetObject.getClass(),methodInterceptor);
    }
}

package com.xy.aop.proxy.impl;

public class CommonPayment {
    public void pay(){
        System.out.println("CommonPayment 支付通道！");
    }
}

               <!--pom.xml引入cglib 的jar -->
        <dependency>
            <groupId>cglib</groupId>
            <artifactId>cglib</artifactId>
            <version>3.2.9</version>
        </dependency>

package com.xy.aop.proxy;

import com.xy.aop.proxy.ToCpayment;
import com.xy.aop.proxy.chlib.AlipayMethodInterceptor;
import com.xy.aop.proxy.chlib.CglibUtil;
import com.xy.aop.proxy.impl.AlipayToC;
import com.xy.aop.proxy.impl.CommonPayment;
import com.xy.aop.proxy.impl.ToCpaymentImpl;
import com.xy.aop.proxy.jdkproxy.AlipayInvocationHandler;
import com.xy.aop.proxy.jdkproxy.JdkDynamicProxyUtil;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

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

public class ProxyDemo {
    public static void main(String[] args){
        //静态代理模式，再代码编译的时候就实现了，通过代理类实现了目标类的功能
//        ToCpayment toCpayment = new AlipayToC(new ToCpaymentImpl());
//        toCpayment.pay();

        //jdk动态代理 生成的代理类实现跟目标类一样的接口来替换掉目标类 ToCpayment为interface
        /**
        System.out.println("****************jdk动态代理开始**********");
        ToCpayment toCpayment = new ToCpaymentImpl();
        //植入切面，AlipayInvocationHandler必须实现InvocationHandler接口
        // 相比静态代理，AlipayInvocationHandler类可以反复利用，目标类参数toCpayment为Object类型
        InvocationHandler handler = new AlipayInvocationHandler(toCpayment);
        //生成动态代理类
        ToCpayment toCProxy = JdkDynamicProxyUtil.newProxyInstance(toCpayment,handler);
        toCProxy.pay();
        System.out.println("****************jdk动态代理结束**********");
        */
        //cglib动态代理，非sun公司写的jar CommonPayment非interface
        System.out.println("****************cglib动态代理开始**********");
        CommonPayment commonPayment = new CommonPayment();
        ///植入切面
        MethodInterceptor methodInterceptor = new AlipayMethodInterceptor();
        //生成动态代理类
        CommonPayment commonPaymentProxy = CglibUtil.CreateProxy(commonPayment,methodInterceptor);
        commonPaymentProxy.pay();
        //cglib动态代理，非sun公司写的jar ToCpayment
        ToCpayment toCpayment1 = new ToCpaymentImpl();
        //生成动态代理类
        ToCpayment toCpaymentProxy = CglibUtil.CreateProxy(toCpayment1,methodInterceptor);
        toCpaymentProxy.pay();
        System.out.println("****************cglib动态代理结束**********");

    }
}

"C:\Program Files\Java\jdk1.8.0_111\bin\java.exe" "-javaagent:D:\IDEA\IntelliJ IDEA Free2020.1\IntelliJ IDEA Community Edition 2020.1\lib\idea_rt.jar=54041:D:\IDEA\IntelliJ IDEA Free2020.1\IntelliJ IDEA Community Edition 2020.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_111\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_111\jre\lib\rt.jar;E:\ideaWorkspace\target\classes;C:\Users\96935\.m2\repository\org\springframework\boot\spring-boot-starter\2.2.6.RELEASE\spring-boot-starter-2.2.6.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\boot\spring-boot\2.2.6.RELEASE\spring-boot-2.2.6.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-context\5.2.5.RELEASE\spring-context-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-aop\5.2.5.RELEASE\spring-aop-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-beans\5.2.5.RELEASE\spring-beans-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-expression\5.2.5.RELEASE\spring-expression-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\boot\spring-boot-autoconfigure\2.2.6.RELEASE\spring-boot-autoconfigure-2.2.6.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\boot\spring-boot-starter-logging\2.2.6.RELEASE\spring-boot-starter-logging-2.2.6.RELEASE.jar;C:\Users\96935\.m2\repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;C:\Users\96935\.m2\repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;C:\Users\96935\.m2\repository\org\apache\logging\log4j\log4j-to-slf4j\2.12.1\log4j-to-slf4j-2.12.1.jar;C:\Users\96935\.m2\repository\org\apache\logging\log4j\log4j-api\2.12.1\log4j-api-2.12.1.jar;C:\Users\96935\.m2\repository\org\slf4j\jul-to-slf4j\1.7.30\jul-to-slf4j-1.7.30.jar;C:\Users\96935\.m2\repository\jakarta\annotation\jakarta.annotation-api\1.3.5\jakarta.annotation-api-1.3.5.jar;C:\Users\96935\.m2\repository\org\springframework\spring-core\5.2.5.RELEASE\spring-core-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\springframework\spring-jcl\5.2.5.RELEASE\spring-jcl-5.2.5.RELEASE.jar;C:\Users\96935\.m2\repository\org\yaml\snakeyaml\1.25\snakeyaml-1.25.jar;C:\Users\96935\.m2\repository\org\projectlombok\lombok\1.18.12\lombok-1.18.12.jar;C:\Users\96935\.m2\repository\cglib\cglib\3.2.9\cglib-3.2.9.jar;C:\Users\96935\.m2\repository\org\ow2\asm\asm\7.0\asm-7.0.jar;C:\Users\96935\.m2\repository\org\apache\ant\ant\1.10.3\ant-1.10.3.jar;C:\Users\96935\.m2\repository\org\apache\ant\ant-launcher\1.10.3\ant-launcher-1.10.3.jar;C:\Users\96935\.m2\repository\org\slf4j\slf4j-api\1.7.30\slf4j-api-1.7.30.jar" com.xy.aop.proxy.ProxyDemo
****************cglib动态代理开始**********
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****************cglib动态代理结束**********

Process finished with exit code 0

动态代理实现机制：

jdk动态代理：基于反射机制实现，要求业务类必须实现接口
cglib动态代理：基于asm机制实现，生成业务类的子类为代理类

jdk动态代理模式优势：

jdk原生，再jvm里运行可靠
支持jdk版本升级

CGLIB动态代理优势：

被代理对象无需实现接口，能实现代理类的无侵入

springAOP默认策略：Bean实现了接口就用jdk动态代理，否则使用CGLIB