通过实例解析Spring argNames属性

package bean;
public class HelloApi {
  public void aspectTest(String a,String b){
    System.out.println("in aspectTest:" + "a:" + a + ",b:" + b);
  }
}

package aspect;

import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;

import java.lang.String;

@Component
@Aspect
public class HelloApiAspect2 {
  
  @Pointcut(value="execution(* bean.HelloApi.aspectTest(..)) && args(a1,b2)",argNames="a1,b2")
  public void pointcut1(String a1,String b2){}
  
  @Before(value="pointcut1(a,b)",argNames="a,b")
  public void beforecase1(String a,String b){
    System.out.println("1 a:" + a +" b:" + b);
  }
  //注意和beforecase1的区别是argNames的顺序交换了
  @Before(value="pointcut1(a,b)",argNames="b,a")
  public void beforecase2(String a,String b){
    System.out.println("2 a:" + a +" b:" + b);
  }
}

package UnitTest;

import org.junit.Assert;
import org.junit.Test;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import bean.HelloApi;

public class Test1 {
  
  @Test
  public void aspectjTest1(){
    BeanFactory beanFactory = new ClassPathXmlApplicationContext("chapter2/aspectTest1.xml");
    HelloApi helloapi1 = beanFactory.getBean("helloapi1",HelloApi.class);
    helloapi1.aspectTest("a", "b");
  }
}

<?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:util="http://www.springframework.org/schema/util"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
      http://www.springframework.org/schema/util
      http://www.springframework.org/schema/util/spring-util-3.0.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context-3.0.xsd
      http://www.springframework.org/schema/aop
      http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
  <context:component-scan base-package="aspect"></context:component-scan>
  
  <bean id="helloapi1" class="bean.HelloApi"></bean>
  <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
</beans>