Spring aop
Posted alloevil
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1 jar:
aopalliance-1.0.0.jar
aspectjweaver-1.6.8.jar
commons-logging-1.2.jar
spring-aop-4.3.3.RELEASE.jar
spring-aspects-4.3.3.RELEASE.jar
spring-beans-4.3.3.RELEASE.jar
spring-context-4.3.3.RELEASE.jar
spring-core-4.3.3.RELEASE.jar
spring-expression-4.3.3.RELEASE.jar
2 在配置文件中加入aop命名空间 基于注解的方式
<?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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd 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"> <!-- configure the InternalResourceViewResolver --> <context:component-scan base-package="com.sgcc"></context:component-scan> <!-- 使AspectJ注解起作用:自动为匹配的类生成代理对象 --> <aop:aspectj-autoproxy></aop:aspectj-autoproxy> </beans>
3
package com.sgcc.aop.impl; public interface ArithmeticCalculator { public int add(int i,int j); public int sub(int i,int j); public int mul(int i,int j); public int div(int i,int j); }
package com.sgcc.aop.impl; import org.springframework.stereotype.Component; @Component public class ArithmeticCalculatorImpl implements ArithmeticCalculator{ @Override public int add(int i, int j) { // TODO Auto-generated method stub int result = i + j; return result; } @Override public int sub(int i, int j) { // TODO Auto-generated method stub int result = i - j; return result; } @Override public int mul(int i, int j) { // TODO Auto-generated method stub int result = i * j; return result; } @Override public int div(int i, int j) { // TODO Auto-generated method stub int result = i / j; return result; } }
package com.sgcc.aop.impl; import java.util.Arrays; import java.util.List; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Before; import org.springframework.stereotype.Component; //把这个类声明为一个切面,把该类放入到IOC容器中,再声明一个切面 @Component @Aspect public class LoggingAspect { //声明该方法是一个前置通知:在目标方法开始之前执行 @Before("execution( * com.sgcc.aop.impl.*.*(int , int ))") public void beforeMethod(JoinPoint joinPoint){ String methodName = joinPoint.getSignature().getName(); List<Object> args = Arrays.asList(joinPoint.getArgs()); System.out.println("the method"+methodName+" begins"+args); } }
package com.sgcc.aop.impl; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class Main { public static void main(String[] args) { ApplicationContext ctx = new ClassPathXmlApplicationContext("appliicationContext.xml"); ArithmeticCalculator arithmeticCalculator = ctx.getBean(ArithmeticCalculator.class); int result = arithmeticCalculator.add(3, 6); System.out.println("result:"+result); result = arithmeticCalculator.div(5, 5); System.out.println("result:"+result); } }
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