Spring中使用AOP及SpringBoot集成AOP

一、Spring中使用AOP

引入Aspect

<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>${aspectj.version}</version>
</dependency>

创建用于拦截的bean

public class TestBean {
    private String message = "test bean";

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public void test(){
        System.out.println(this.message);
    }
}

创建Advisor

@Aspect
public class AspectJTest {
    @Pointcut("execution(* *.test(..))")
    public void test(){
    }
    
    @Before("test()")
    public void beforeTest(){
        System.out.println("beforeTest");
    }
    
    @Around("test()")
    public Object aroundTest(ProceedingJoinPoint p){
        System.out.println("around.....before");
        Object o = null;
        try{
            o = p.proceed();
        }catch(Throwable e){
            e.printStackTrace();
        }
        System.out.println("around.....after");
        return o;
    }
    
    @After("test()")
    public void afterTest()
    {
        System.out.println("afterTest");
    }
 }

创建配置文件

要在Spring中开启AOP功能，还需要在配置文件中作如下声明，开启AOP：

<?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">

    <aop:aspectj-autoproxy/>
    <bean id="test" class="com.yhl.myspring.demo.aop.TestBean">
        <property name="message" value="这是一个苦逼的程序员"/>
    </bean>
    <bean id="aspect" class="com.yhl.myspring.demo.aop.AspectJTest"/>
</beans>

注解开启AOP

开启AOP<aop:aspectj-autoproxy/>也可以使用注解的方式，如下，使用@EnableAspectJAutoProxy配置在任何一个@Configratrion或者@Component上

 

 

 

二、SpringBoot集成AOP

添加pom依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-aop</artifactId>
</dependency>

引入了AOP的场景启动器，我们点击去看看

 

 还是引入了spring-aop和aspectj的依赖，和我们Spring集成AOP是引入了相同的包，接着我们直接就可以创建Advisor了，如上AspectJTest这个类，但是我们并没有通过@EnableAspectJAutoProxy开启AOP呢？那是因为AOP的自动配置类帮我们开启了

AopAutoConfiguration

一旦导入了spring-boot-starter-aop依赖后，SpringBoot就会启动AOP的自动配置类AopAutoConfiguration：

 

 我们来看看AopAutoConfiguration这个自动配置类

@Configuration
@ConditionalOnClass({ EnableAspectJAutoProxy.class, Aspect.class, Advice.class })
@ConditionalOnProperty(prefix = "spring.aop", name = "auto", havingValue = "true", matchIfMissing = true)
public class AopAutoConfiguration {

    @Configuration
    //使用注解开启AOP功能
    @EnableAspectJAutoProxy(proxyTargetClass = false)
    @ConditionalOnProperty(prefix = "spring.aop", name = "proxy-target-class", havingValue = "false", matchIfMissing = true)
    public static class JdkDynamicAutoProxyConfiguration {

    }

    @Configuration
    //使用注解开启AOP功能
    @EnableAspectJAutoProxy(proxyTargetClass = true)
    @ConditionalOnProperty(prefix = "spring.aop", name = "proxy-target-class", havingValue = "true", matchIfMissing = false)
    public static class CglibAutoProxyConfiguration {

    }

}

不管使用jdk代理还是cglib代理，都有@EnableAspectJAutoProxy注解，所以只要导入spring-boot-starter-aop依赖后，就自动帮我们开启了AOP，我们可以直接添加切面使用AOP了。

 

@EnableAspectJAutoProxy这个注解是整个AOP的灵魂，其作用和<aop:aspectj-autoproxy/>是一样的。

可以看看其源码分析spring5 源码深度解析----- AOP的使用及AOP自定义标签

 

附：@Aspect 实现样例代码

import java.util.Date;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

/**
 * 
 */
@Aspect
@Component
public class HandlerMonitor {

    private static Log logger = LogFactory.getLog(HandlerMonitor.class);
    
    @Pointcut("execution(public com.xxx.xxx.commons.base.lang.JsonData com.ke.xxx.xxx.controller..*.*(..))")
    public void pointCut() {}
    
    @Around("pointCut()")
    public Response processHandler(ProceedingJoinPoint pjp) {

        Response response = null;

        logger.info(LogUtils.getCommLog(
                String.format("The process method: %s", pjp.getSignature().getName())));

        // 开始时间
        Date startDate = new Date();

        Request cRequest = null;
        try {
            cRequest = Request.getRequest();
            logger.info(LogUtil.formatLog(String.format("[REQUEST]%s %s",
                    cRequest.getUrl(), cRequest.getRequest().getHttpParams())));
            response = (JsonData) pjp.proceed();
        } catch (Exception e) {

            response = new JsonData();

            // 判断是否为BaseException异常及其子异常
            if (BaseException.class.isAssignableFrom(e.getClass())) {
                BaseException baseException = (BaseException) e;
                logger.error(LogUtils.getCommLog(baseException.toString()));
            } else {
                logger.error(LogUtils.getCommLog(e.toString()), e);
            }
        } catch (Throwable e) {
            response = new JsonData();
            logger.error(LogUtils.getCommLog(e.toString()), e);
        }

        // 获取处理时间
        int costTime = this.getAndFillCostTime(startDate);

        // 日志打印
        logger.info(LogUtils.getResponseLog(costTime, response.toString(),
                cRequest.getUrl()));
        try {
            logger.info(LogUtils.getCommLog(String.format("当前登录人ID和姓名：%s %s", libraAssist.getUserId(), libraAssist.getUserName())));
        } catch (Exception e) {
            logger.error(LogUtils.getCommLog(String.format("获取当前登录人信息异常")));
        }
        
        return response;
    }
    
    /**
     * 获取处理时间
     * 
     * @param meta
     * @param startTime
     * @return
     */
    public int getAndFillCostTime(Date startTime) {
        if (startTime == null) {
            return 0;
        }

        Date endDate = new Date();
        int costTime = (int) (endDate.getTime() - startTime.getTime());

        return costTime;

    }
}