Spring之AOP通知顺序

一、面试题：

1、Aop 的全部通知顺序 以及Springboot 或 Springboot2 对 Aop 的执行顺序影响

2、说说你使用 Aop 中碰到的坑

二、Spring4,5与SpringBoot1,2的关联以及对通知的影响

一、前置代码准备

1、service层

接口：
public interface CalcService {
    public int div(int x, int y);
}

实现类：
@Service
public class CalcServiceImpl implements CalcService {
    @Override
    public int div(int x, int y) {
        int result = x / y;
        System.out.println("=========>CalcServiceImpl被调用了,我们的计算结果：" + result);
        return result;
    }
}

2、切面类

@Aspect
@Component
public class MyAspect {
    @Before("execution(public int com.heygo.spring.aop.CalcServiceImpl.*(..))")
    public void beforeNotify() {
        System.out.println("******** @Before我是前置通知MyAspect");
    }

    @After("execution(public int com.heygo.spring.aop.CalcServiceImpl.*(..))")
    public void afterNotify() {
        System.out.println("******** @After我是后置通知");
    }

    @AfterReturning("execution(public int com.heygo.spring.aop.CalcServiceImpl.*(..))")
    public void afterReturningNotify() {
        System.out.println("********@AfterReturning我是返回后通知");
    }

    @AfterThrowing("execution(public int com.heygo.spring.aop.CalcServiceImpl.*(..))")
    public void afterThrowingNotify() {
        System.out.println("********@AfterThrowing我是异常通知");
    }

    @Around("execution(public int com.heygo.spring.aop.CalcServiceImpl.*(..))")
    public Object around(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        Object retValue = null;
        System.out.println("我是环绕通知之前AAA");
        retValue = proceedingJoinPoint.proceed();
        System.out.println("我是环绕通知之后BBB");
        return retValue;
    }
}

二、Spring4与SpringBoot1对通知顺序的影响

Spring4对应的是SpringBoot1

1、加入依赖

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <!-- <version>2.3.3.RELEASE</version> -->
        <version>1.5.9.RELEASE</version>
        <relativePath/>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.heygo</groupId>
    <artifactId>interview1024</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <!-- <version>1.5.9.RELEASE</version>
               ch/qos/logback/core/joran/spi/JoranException解决方案-->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-core</artifactId>
            <version>1.1.3</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-access</artifactId>
            <version>1.1.3</version>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.1.3</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- springboot-jdbc 技术 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!-- springboot-aop 技术 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <!--hutool-->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-captcha</artifactId>
            <version>4.6.8</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

2、创建测试类

@SpringBootTest
@RunWith(SpringRunner.class)  //1.5.9
public class AopTest {
    @Autowired
    private CalcService calcService;

    @Test
    public void testAop4() {
        System.out.println("spring版本：" + SpringVersion.getVersion() + "\t" + "SpringBoot版本：" + SpringBootVersion.getVersion());
        System.out.println();
        calcService.div(10, 2);
        // calcService.div(10, 0);
    }
}

3、结果

正常情况下

 异常情况下

三、Spring5与SpringBoot2对通知顺序的影响

1、pom文件引入

SpringBoot 2.3.3.RELEASE 版本的对应的 Spring 版本为 5.2.8 Release

<?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">

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.3.RELEASE</version>
        <!-- <version>1.5.9.RELEASE</version> -->
        <relativePath/>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.heygo</groupId>
    <artifactId>interview1024</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- springboot-jdbc 技术 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!-- springboot-aop 技术 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <!--hutool-->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-captcha</artifactId>
            <version>4.6.8</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

二、结果

1、正常执行

 2、执行异常