AOP实现方法
原文地址
http://michael-softtech.iteye.com/blog/650779
(1)使用ProxyFactoryBean的代理
Java代码
![]()
![]()
package chapter4;
public interface Performable {
public void perform() throws Exception;
}
package chapter4;
import java.util.Random;
public class Artist implements Performable {
public void perform() throws Exception {
int num = new Random().nextInt(100);
if(num >= 50) {
throw new Exception(String.valueOf(num));
} else {
System.out.println(num);
}
}
}
package chapter4;
public class Audience {
public Audience() {
}
public void takeSeats() {
System.out.println("The audience is taking their seats.");
}
public void turnOffCellPhones() {
System.out.println("The audience is turning off " + "their cellphones");
}
public void applaud() {
System.out.println("CLAP CLAP CLAP CLAP CLAP");
}
public void demandRefund() {
System.out.println("Boo! We want our money back!");
}
}
package chapter4;
import java.lang.reflect.Method;
import org.springframework.aop.AfterReturningAdvice;
import org.springframework.aop.MethodBeforeAdvice;
import org.springframework.aop.ThrowsAdvice;
public class AudienceAdvice
implements MethodBeforeAdvice, AfterReturningAdvice, ThrowsAdvice {
private Audience audience;
public void setAudience(Audience audience) {
this.audience = audience;
}
public void before(Method method, Object[] args, Object target)
throws Throwable {
audience.takeSeats();
audience.turnOffCellPhones();
}
public void afterReturning(Object returnValue, Method method, Object[] args,
Object target) throws Throwable {
audience.applaud();
}
public void afterThrowing(Exception ex) {
audience.demandRefund();
}
}
Xml代码
![]()
![]()
<?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: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/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">
<bean id="audience" class="chapter4.Audience" />
<bean id="audienceAdvice" class="chapter4.AudienceAdvice" >
<property name="audience" ref="audience" />
</bean>
<bean id="audienceAdvisor" class="org.springframework.aop.aspectj.AspectJExpressionPointcu
tAdvisor">
<property name="advice" ref="audienceAdvice" />
<property name="expression" value="execution(* *.perform(..))" />
</bean>
<bean id="artistTarget" class="chapter4.Artist" />
<bean id="artist" class="org.springframework.aop.framework.ProxyFactoryBean" >
<property name="target" ref="artistTarget" />
<property name="interceptorNames" value="audienceAdvisor" />
<property name="proxyInterfaces" value="chapter4.Performable" />
</bean>
</beans>
(2)隐式使用ProxyFactoryBean的aop代理
DefaultAdvisorAutoProxyCreator实现了BeanPostProcessor,它将自动检查advisor的pointcut是否匹配bean的方法,如果匹配会替换bean为一个proxy,并且应用其advice。
Xml代码
![]()
![]()
<?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: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/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">
<bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyC
reator" />
<bean id="audience" class="chapter4.Audience" />
<bean id="audienceAdvice" class="chapter4.AudienceAdvice" >
<property name="audience" ref="audience" />
</bean>
<bean id="audienceAdvisor" class="org.springframework.aop.aspectj.AspectJExpressionPointcu
tAdvisor">
<property name="advice" ref="audienceAdvice" />
<property name="expression" value="execution(* *.perform(..))" />
</bean>
<bean id="artist" class="chapter4.Artist" />
</beans>
(3)使用注解的aop代理
xml中增加了一个<aop:aspectj-autoproxy />,它创建了AnnotationAwareAspectJAutoProxyCreator在spring中,这个类将自动代理匹配的类的放方法。和上个例子中DefaultAdvisorAutoProxyCreator做同样的工作。
Java代码
![]()
![]()
package chapter4;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
@Aspect
public class Audience {
public Audience() {
}
@Pointcut("execution(* *.perform(..))")
public void pointcut(){}
@Before("pointcut()")
public void takeSeats() {
System.out.println("The audience is taking their seats.");
}
@Before("pointcut()")
public void turnOffCellPhones() {
System.out.println("The audience is turning off " + "their cellphones");
}
@AfterReturning("pointcut()")
public void applaud() {
System.out.println("CLAP CLAP CLAP CLAP CLAP");
}
@AfterThrowing("pointcut()")
public void demandRefund() {
System.out.println("Boo! We want our money back!");
}
}
Xml代码
![]()
![]()
<?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: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/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">
<aop:aspectj-autoproxy />
<bean id="audience" class="chapter4.Audience" />
<bean id="artist" class="chapter4.Artist" />
</beans>
(4)使用aop配置文件的自动代理
采用这种方法,不用加<aop:aspectj-autoproxy />
Java代码
![]()
![]()
package chapter4;
import org.aspectj.lang.annotation.Aspect;
@Aspect
public class Audience {
public Audience() {
}
public void pointcut() {
}
public void takeSeats() {
System.out.println("The audience is taking their seats.");
}
public void turnOffCellPhones() {
System.out.println("The audience is turning off " + "their cellphones");
}
public void applaud() {
System.out.println("CLAP CLAP CLAP CLAP CLAP");
}
public void demandRefund() {
System.out.println("Boo! We want our money back!");
}
}
Xml代码
![]()
![]()
<?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: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/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">
<bean id="audience" class="chapter4.Audience" />
<aop:config>
<aop:aspect ref="audience">
<aop:before method="takeSeats" pointcut="execution(* *.perform(..))" />
<aop:before method="turnOffCellPhones" pointcut="execution(* *.perform(..))" />
<aop:after-returning method="applaud" pointcut="execution(* *.perform(..))" />
<aop:after-throwing method="demandRefund" pointcut="execution(* *.perform(..))" />
</aop:aspect>
</aop:config>
<bean id="artist" class="chapter4.Artist" />
</beans>
AOP实现方法的更多相关文章
- JS实现AOP拦截方法调用
//JS实现AOP拦截方法调用function jsAOP(obj,handlers) { if(typeof obj == 'function'){ obj = obj.prot ...
- AOP记录方法的执行时间
作用AOP监控方法的运行时间如下: @Component @Aspect public class LogAop { private Logger log = LoggerFactory.getLog ...
- 动态代理AOP实现方法过滤
上一节实现了动态代理,接下来 有时候,我不需要在每一个方法都要记录日志,做权限验证 等等. 所有就有了这样的需求.AOP实现特定方法过滤,有选择性的来对方法实现AOP 拦截.就是本节标题所示. 举个例 ...
- AOP获取方法注解实现动态切换数据源
AOP获取方法注解实现动态切换数据源(以下方式尚未经过测试,仅提供思路) ------ 自定义一个用于切换数据源的注解: package com.xxx.annotation; import org. ...
- 使用Spring Aop验证方法参数是否合法
先定义两个注解类ValidateGroup 和 ValidateFiled ValidateGroup .java package com.zf.ann; import java.lang.annot ...
- 使用AOP实现方法执行时间和自定义注解
环境:IDEA2018+JDK1.8+SpringBoot 第一步:在pom文件中引入依赖(度娘有很多(*^▽^*)): <!--引入AOP的依赖--><dependency> ...
- (一)七种AOP实现方法
在这里列表了我想到的在你的应用程序中加入AOP支持的所有方法.这里最主要的焦点是拦截,因为一旦有了拦截其它的事情都是细节. Approach 方法 Advantages 优点 Disadvantage ...
- JAVA动态代理和方法拦截(使用CGLib实现AOP、方法拦截、委托)
AOP用CGLib更简便.更可控. 动态代理的实现非常优雅. 实体类: public class SampleClass { public String MyFunction1(String inpu ...
- AOP 增强方法
Spring AOP 提供了 5 种类型的通知,它们分别是 Before Advice(前置通知).After Returning Advice(后置通知).Interception Around A ...
随机推荐
- eclipse 上安装systemgui
http://wiki.eclipse.org/Linux_Tools_Project/PluginInstallHelp http://wiki.eclipse.org/Linux_Tools_Pr ...
- Java基础知识强化之集合框架笔记30:集合之泛型的引入
1. 泛型的引入: (1)首先我们看看下面这一段代码,如下: package cn.itcast_01; import java.util.ArrayList; import java.util.It ...
- Android Activity横竖屏转换的生命周期
新创建一个Activity,用来此次测试. 先贴代码 package com.hugo.apj.activitylifetest; import android.support.v7.app.AppC ...
- Linux squid 安装配置
linux 代理软件 squid 查看是否安装squid 以上信息表明,本机是已经安装了此软件了 如果没有显示说明没有安装,则可以使用yum工具来安装 安装完软件后我们接着开始配置squid代 ...
- AS插件开发 RemoveButterKnife从构思到实现
ReomveButterKnife插件 这是一个用于移除代码中对ButterKnife使用的AS插件,接下来我们将从头开始讲讲这个插件的开发过程 地址是 https://github.com/u3sh ...
- js数组操作的常用方法
数组:arr=[1,2,3,4,5]; 1.数组转换成字符串,不会修改原数组内容: arr.join(); // "1,2,3,4,5" arr.join("" ...
- WisDom.Net 框架设计(一) 总体框架
WisDom.Net总体框架 1.目标 WisDom.Net 做为以后快速开发相关的软件的基础框架,实现用户,权限,角色,菜单,和工作流的管理功能.相关功能可以独立使用,快速用于其他程序的开发.预计 ...
- wpf 大控件 打印 将控件转成 xps格式 并分页打印
//PayRollPrintList:要打印的 list 可换成自己要打印的类型 private List<PayRoll> _PayRollPrintList = new List< ...
- CouchBase 遇到问题笔记(一)
刚开始看CouchBase,按照官网给出的示例,边敲边理解,遇到了一个很奇怪的问题,如下代码: IView<IViewRow> view = client.GetView("be ...
- 最简单的基于FFmpeg的推流器(以推送RTMP为例)
===================================================== 最简单的基于FFmpeg的推流器系列文章列表: <最简单的基于FFmpeg的推流器(以 ...