用maven搭建一个简易的springAOP

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/l707268743/article/details/79339746

用maven搭建一个简易的springAOP

1.首先新建一个maven项目

2.修改pom.xml文件,引入3个jar包:

• spring-aop
• spring-context
• aspectjweaver

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.anting</groupId>
    <artifactId>anting</artifactId>
    <version>1.0-SNAPSHOT</version>


    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>5.0.3.RELEASE</version>
        </dependency>
        <!--  -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.3.13.RELEASE</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.13</version>
        </dependency>

    </dependencies>


</project>

3.在src/main/java下面进行操作

3.1.在resources目录下新建application.xml文件

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd
           http://www.springframework.org/schema/aop
           http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
           "><!-- 要添加最后2行 -->

    <context:annotation-config />
    <context:component-scan base-package="com.anting"/>  <!-- 自动扫描 -->
    <aop:aspectj-autoproxy/>  <!-- 要添加本行 -->
</beans>

3.2 新建AOP类

package com.anting;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;

/**
 * @author liyk
 * @date 2018-02-19 下午 8:35
 */
@Component
@Aspect
public class Aop {

    /**
     * 定义切面,拦截方法
     execution(
        public : 方法的修饰词(*代表所有)
        String : 方法的返回值(*代表所有)
        com.anting..* : 包com.anting和其下面所有子包的所有类(..表示包含子包下的所有类)
        .run* : 方法名,此处可指定类名以run开头(*run*表示方法名只需要run即可,类似*run)
        (..) : 接受的参数类型,(..表示所有参数)[(int,*)表示接受参数为2个,其中第一个为int类型,第二个任一]
     )
     */
    @Pointcut("execution (public * com.anting..*.run*(..))")
    public void pointCutMethod(){};

/*    @Before("pointCutMethod()")
    public void before() {
        System.out.println("method start");
    }

    @After("pointCutMethod()")
    public void after(){
        System.out.println("method end");
    }*/

    @Around("pointCutMethod()")
    public void around(ProceedingJoinPoint joinpoint) throws Throwable {
        //可以先做一些判断
        if(1==1){
            System.out.println("方法条件满足,开始执行方法!");
            joinpoint.proceed();
            System.out.println("执行方法完毕!");
        }else{
            System.out.println("方法条件不满足,直接退出!");
        }
    }
}

3.3 新建测试用类

package com.anting;

import org.springframework.stereotype.Component;

//定义Spring的bean
@Component("person")
public class Person {
    public void run(){
        System.out.println("我在run...");
    }

    public String run(int i){
        System.out.println("我在run"+i+"...");
        return i+"";
    }

    public void run(int i,String a){
        System.out.println("我在run"+i+"..." + a);
    }

    public void say(){
        System.out.println("我在say...");
    }

}

4 测试结果

package com.anting;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * @author liyk
 * @date 2018-02-19 下午 9:53
 */
public class Demo1 {

    public static void main(String[] args) {
        ClassPathXmlApplicationContext ctx =
                new ClassPathXmlApplicationContext("application.xml");
        Person person = (Person)ctx.getBean("person");
        person.run(1);
        person.run(1,"test");
        person.say();
    }

}

5 测试结果

方法条件满足,开始执行方法!
我在run1...
执行方法完毕!
方法条件满足,开始执行方法!
我在run1...test
执行方法完毕!
我在say...