Spring AOP与IOC

Spring AOP实现日志服务

pom.xml需要的jar

<dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId><version>3.4</version>
</dependency>
<dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>4.2.4.RELEASE</version>
</dependency>
<dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>4.2.4.RELEASE</version>
</dependency>
<dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>4.2.4.RELEASE</version>
</dependency>
<dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>4.2.4.RELEASE</version>
</dependency>
<dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>4.2.4.RELEASE</version>
</dependency>
<dependency><groupId>cglib</groupId><artifactId>cglib-nodep</artifactId><version>3.2.0</version>
</dependency>
<dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.8.8</version>
</dependency>
<dependency><groupId>aopalliance</groupId><artifactId>aopalliance</artifactId><version>1.0</version>
</dependency>
<dependency><groupId>commons-collections</groupId><artifactId>commons-collections</artifactId><version>3.2.2</version>
</dependency>
<dependency><groupId>commons-logging</groupId><artifactId>commons-logging</artifactId><version>1.2</version>
</dependency>

1.Before Advice

Before Advice会在目标方法执行之前被调用，可以通过实现org.springframework.aop.MethodBeforeAdvice接口实现。

LogBeforeAdvice.java

package com.blog.csdn.net.unix21;import java.lang.reflect.Method;
import java.util.logging.Level;
import org.springframework.aop.MethodBeforeAdvice;
import java.util.logging.Logger;/**** @author http://blog.csdn.net/unix21/*/
public class LogBeforeAdvice implements MethodBeforeAdvice {private Logger logger=Logger.getLogger(this.getClass().getName());public void before(Method method,Object[] args,Object target) throws Throwable{logger.log(Level.INFO,"日志信息>>>method starts..."+method);}
}

beans-config.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="   http://www.springframework.org/schema/beans   http://www.springframework.org/schema/beans/spring-beans-4.0.xsd   http://www.springframework.org/schema/context   http://www.springframework.org/schema/context/spring-context-4.0.xsd  http://www.springframework.org/schema/mvc   http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd"> 
<bean id="LogBeforeAdvice" class="blog.csdn.net.unix21.LogBeforeAdvice"/>
<bean id="HelloSpeaker" class="blog.csdn.net.unix21.HelloSpeake"/>
<bean id="HelloProxy" class="org.springframework.aop.framework.ProxyFactoryBean"><property name="proxyInterfaces" value="blog.csdn.net.unix21.IHello"/><property name="target" ref="HelloSpeaker"/><property name="interceptorNames"><list><value>LogBeforeAdvice</value></list></property>
</bean>
</beans>

接口

IHello.java

package blog.csdn.net.unix21;public interface IHello {
public void hello(String name);
}

HelloSpeaker.java

package blog.csdn.net.unix21;public class HelloSpeaker implements IHello {public void hello(String name){System.out.println("Hello, "+name);}
}

测试Before Advice

  ApplicationContext context=new ClassPathXmlApplicationContext("beans-config.xml");IHello h=(IHello)context.getBean("helloProxy");h.hello("blog.csdn.net.unix21")

运行成功使用AOP的方式打印日志信息：

参考：《Spring 2.0技术手册》

Spring 3.1编写AOP时需要导入的倚赖jar包汇总

菜鸟学SSH（七）——Spring jar包详解

2.After Advice

After Advice会在目标方法执行之后被调用，可以通过实现org.springframework.aop.AfterReturningAdvice接口来实现

import java.lang.reflect.Method;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.springframework.aop.AfterReturningAdvice;public class LogAfterAdvice  implements AfterReturningAdvice  {
private Logger logger=Logger.getLogger(this.getClass().getName());public void afterReturning(Object object, Method method, Object[] args, Object target) throws Throwable {logger.log(Level.INFO,"日志信息<<<method ends..."+method);}  
}

修改beans-config.xml配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="   http://www.springframework.org/schema/beans   http://www.springframework.org/schema/beans/spring-beans-4.0.xsd   http://www.springframework.org/schema/context   http://www.springframework.org/schema/context/spring-context-4.0.xsd  http://www.springframework.org/schema/mvc   http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd"> 
<bean id="LogBeforeAdvice" class="blog.csdn.net.unix21.LogBeforeAdvice"/>
<bean id="HelloSpeaker" class="blog.csdn.net.unix21.HelloSpeake"/>
<bean id="HelloProxy" class="org.springframework.aop.framework.ProxyFactoryBean"><property name="proxyInterfaces" value="blog.csdn.net.unix21.IHello"/><property name="target" ref="HelloSpeaker"/><property name="interceptorNames"><list><value>LogBeforeAdvice</value><value>LogAfterAdvice</value></list></property>
</bean>
</beans>

成功的执行了LogAfterAdvice