四种常用的通知类型(xml)

1、maven依赖

<?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.ly.spring</groupId>

    <artifactId>spring05</artifactId>

    <version>1.0-SNAPSHOT</version>

    <packaging>jar</packaging>

    <dependencies>

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-context</artifactId>

            <version>5.0.2.RELEASE</version>

        </dependency>

        <!--用于解析切入点表达式-->

        <dependency>

            <groupId>org.aspectj</groupId>

            <artifactId>aspectjweaver</artifactId>

            <version>1.8.6</version>

        </dependency>

        <!--用于整合junit-->

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-test</artifactId>

            <version>5.0.2.RELEASE</version>

            <scope>test</scope>

        </dependency>

        <dependency>

            <groupId>junit</groupId>

            <artifactId>junit</artifactId>

            <version>4.12</version>

            <scope>test</scope>

        </dependency>

    </dependencies>

    <!--解决IDEA maven变更后自动重置LanguageLevel和JavaCompiler版本的问题-->

    <build>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

                <version>2.3.2</version>

                <configuration>

                    <source>13</source>

                    <target>13</target>

                </configuration>

            </plugin>

        </plugins>

    </build>

</project>

2、实体类

package com.ly.spring.domain;

import java.io.Serializable;

public class Account implements Serializable {

}

3、service接口

package com.ly.spring.service;

import com.ly.spring.domain.Account;

import java.util.List;

public interface IAccountService {

    public List<Account> findAll();

}

4、service实现类

package com.ly.spring.service.impl;

import com.ly.spring.domain.Account;

import com.ly.spring.service.IAccountService;

import org.springframework.stereotype.Service;

import java.util.List;

@Service("accountService")

public class AccountServiceImpl implements IAccountService {

    @Override

    public List<Account> findAll() {

        System.out.println("AccountServiceImpl---findAll");

        int i= 1/0;

        return null;

    }

}

5、通知类

package com.ly.spring.utils;

import org.springframework.stereotype.Component;

@Component("logUtil")

public class LogUtil {

    public void beforeFunc() {

        System.out.println("---前置通知---");

    }

    public void afterReturnFunc() {

        System.out.println("---后置通知---");

    }

    public void afterThrowFunc() {

        System.out.println("---异常通知---");

    }

    public void afterFunc() {

        System.out.println("--最终通知--");

    }

}

6、spring配置文件

<?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.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context.xsd

        http://www.springframework.org/schema/aop

        http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--配置注解扫描的包-->

    <context:component-scan base-package="com.ly.spring"></context:component-scan>

    <!--aop相关配置-->

    <aop:config>

        <!--id指定通知的id，ref指定通知bean-->

        <aop:aspect id="logAdvisor" ref="logUtil">

            <!--配置通知类型，method指定调用通知bean的方法，pointcut-ref指定切入点表达式-->

            <!--前置通知，在目标方法执行前执行-->

            <aop:before method="beforeFunc" pointcut-ref="logPointCut"></aop:before>

            <!--后置通知，在目标方法执行后执行，若目标方法抛出异常，则不会执行-->

            <aop:after-returning method="afterReturnFunc" pointcut-ref="logPointCut"></aop:after-returning>

            <!--异常通知，在目标方法抛出异常后执行-->

            <aop:after-throwing method="afterThrowFunc" pointcut-ref="logPointCut"></aop:after-throwing>

            <!--最终通知，不论目标方法是否抛出异常，都会执行-->

            <aop:after method="afterFunc" pointcut-ref="logPointCut"></aop:after>

            <!--配置切入点表达式-->

            <!--

            1、若配置在aop:aspect标签内则只对当前切面有效

            2、可以配置在aop:aspect标签外，此时aop:pointcut标签必须配置在所有的aop:aspect标签前面，对所有的切面有效

            -->

            <aop:pointcut id="logPointCut" expression="execution(* com.ly.spring.service.impl.*.*(..))"/>

        </aop:aspect>

    </aop:config>

</beans>

7、测试类

package com.ly.spring.test;

import com.ly.spring.domain.Account;

import com.ly.spring.service.IAccountService;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

//替换junit的main方法

@RunWith(SpringJUnit4ClassRunner.class)

//指定spring配置文件的位置

@ContextConfiguration(locations = "classpath:bean.xml")

public class MainTest {

    @Autowired

    private IAccountService accountService;

    @Test

    public void test1() {

        accountService.findAll();

    }

}