标签：equals 参数 intercept stat for ssl tip test win
/**
* author:Chen
* date:2019/10/7 14:04
*/
public interface IActor {
public void sing(String money);
public void actor();
}
public class Actor implements IActor {
//只要参数传进来的时候是有钱的
public void sing(String money) {
System.out.println("演员唱歌");
}
public void actor() {
System.out.println("演员演戏");
}
}
/**
* 使用jdk自带的Proxy类实现动态代理
*/
@Test
public void demo04(){
//创建一个接口的实现类的对象
final Actor actor=new Actor();
IActor proxyActor = (IActor)Proxy.newProxyInstance(actor.getClass().getClassLoader(), Actor.class.getInterfaces(), new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
//将实现类的对象作为对象传入进去执行对应重写的方法
Object proxy_actor=null;
String name = method.getName();
if(name.equals("sing"))
{
double money = Double.parseDouble((String)args[0]);
if (money>1000d){//可以对金额进行判断，同时可以将一些不合法的参数进剔除
proxy_actor= method.invoke(actor, args);
}
else
{
System.out.println("不能唱歌，钱太少了");
}
}
return proxy_actor;//必须要将invoke执行返回的代理对象返回
}
});
//将钱交给经纪人进行判定是否要唱歌，实现了动态代理的功能
proxyActor.sing("1000");
}
/**
* 必须要引入cglib的包
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.1</version>
</dependency>
* 执行被代理类的方法的时候，进行拦截，不需要实现接口
*/
@Test
public void demo05() {
final Actor actor = new Actor();
Actor proxy_actor = (Actor) Enhancer.create(Actor.class, new MethodInterceptor() {
//创建一个方法拦截器来进行拦截
public Object intercept(Object o, Method method, Object[] args, MethodProxy methodProxy) throws Throwable {
Object rtvalue = null;
if (method.getName().equals("sing")) {
if (Double.parseDouble((String) args[0]) > 1000) {
rtvalue = method.invoke(actor, args);
}
else
{
System.out.println("不能唱歌");
}
}
return rtvalue;
}
});
proxy_actor.sing("999");
}
一个小demo，用前置，后置，异常，最终通知配置，将logger类的方法加入进去
spring的配置文件 完整的spring约束
<?xml version="1.0" encoding="utf-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--将切入点的bean配置-->
<bean id="accountService" class="com.huawei.service.impl.AccountServiceImpl"></bean>
<!--将切面的bean进行配置-->
<bean id="logger" class="com.huawei.utils.Logger"></bean>
<!--配置切面-->
<aop:config>
<aop:aspect id="loggeradvice" ref="logger" >
<!--前置通知-->
<aop:before method="before_printLog" pointcut="execution(* com.huawei.service.impl.AccountServiceImpl.*(..))"></aop:before>
<!--后置通知-->
<aop:after-returning method="afterreturning_printLog" pointcut="execution(* com.huawei.service.impl.AccountServiceImpl.*(..))" ></aop:after-returning>
<!--异常通知-->
<aop:after-throwing method="afterthrowing_printLog" pointcut="execution(* com.huawei.service.impl.AccountServiceImpl.*(..))"></aop:after-throwing>
<!--最终通知-->
<aop:after method="after_printLog" pointcut="execution(* com.huawei.service.impl.AccountServiceImpl.*(..))"></aop:after>
</aop:aspect>
</aop:config>
</beans>
public class SpringTest {
public static void main(String[] args) {
//必须通过spring的方式获取的对象，才能实现aop
ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext("bean.xml");
AccountService accountService = (AccountService)applicationContext.getBean("accountService");
accountService.saveAccount(account);//执行的时候将携带那些通知
}
}
小demo，通过在代码中写代码进行环绕通知的配置
<?xml version="1.0" encoding="utf-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--将切入点的bean配置-->
<bean id="accountService" class="com.huawei.service.impl.AccountServiceImpl"></bean>
<!--将切面的bean进行配置-->
<bean id="logger" class="com.huawei.utils.Logger"></bean>
<!--配置切面-->
<aop:config>
<!--配置通用的切入点-->
<aop:pointcut id="pt-1" expression="execution(* com.huawei.service.impl.AccountServiceImpl.*(..))"></aop:pointcut>
<aop:aspect id="loggeradvice" ref="logger" >
<!-- <!–前置通知–>
<aop:before method="before_printLog" pointcut="execution(* com.huawei.service.impl.AccountServiceImpl.*(..))"></aop:before>
<!–后置通知–>
<aop:after-returning method="afterreturning_printLog" pointcut="execution(* com.huawei.service.impl.AccountServiceImpl.*(..))" ></aop:after-returning>
<!–异常通知–>
<aop:after-throwing method="afterthrowing_printLog" pointcut="execution(* com.huawei.service.impl.AccountServiceImpl.*(..))"></aop:after-throwing>
<!–最终通知–>
<aop:after method="after_printLog" pointcut="execution(* com.huawei.service.impl.AccountServiceImpl.*(..))"></aop:after>-->
<!--环绕通知-->
<aop:around method="around_printLog" pointcut-ref="pt-1"></aop:around>
</aop:aspect>
</aop:config>
</beans>
java的动态代理的两种方式和spring的aop面向切面编程的对比
标签：equals 参数 intercept stat for ssl tip test win
原文地址：https://www.cnblogs.com/jeasonchen001/p/11631264.html
