手写SpringBoot（五）之整合AOP

系列文章目录

手写SpringBoot（一）之简易版SpringBoot
手写SpringBoot（二）之动态切换Servlet容器
手写SpringBoot（三）之自动配置
手写SpringBoot（四）之bean动态加载
手写SpringBoot（五）之整合AOP

手写SpringBoot（五）之整合AOP

Spring开启aop只需要在任意一个加了@Configuration配置类的上面加上@EnableAspectJAutoProxy注解就行

新建my-spring-boot-starter-aop模块

1. 引入aspectj依赖

		<dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.5</version>
        </dependency>

        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.9.5</version>
        </dependency>

        <dependency>
            <groupId>cn.axj</groupId>
            <artifactId>my-spring-boot-configuration</artifactId>
            <version>1.0-SNAPSHOT</version>
		</dependency>

2. 创建AopAutoConfiguration配置类，并配置@EnableAspectJAutoProxy注解

package cn.axj.aop.springboot.config;

import cn.axj.springboot.my.config.AutoConfiguration;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

@Configuration
public class AopAutoConfiguration implements AutoConfiguration {
    
    @Configuration
    @EnableAspectJAutoProxy
    static class AspectjConfiguration{

    }
}

3. 创建配置类文件 META-INF/service/cn.axj.springboot.my.config.AutoConfiguration文件，并将AopAutoConfiguration的路径配置进去

cn.axj.aop.springboot.config.AopAutoConfiguration

下面开始测试，在user-servcie模块中引入my-spring-boot-starter-aop

	<dependency>
            <groupId>cn.axj</groupId>
            <artifactId>my-spring-boot-starter-aop</artifactId>
            <version>1.0-SNAPSHOT</version>
    </dependency>

1. 创建aop包，并创建TestAopAnnotation注解

package cn.axj.user.aop;

import java.lang.annotation.*;

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface TestAopAnnotation {

}

2. 创建aop代理类TestAop

package cn.axj.user.aop;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class TestAop {
    @Around("@annotation(cn.axj.user.aop.TestAopAnnotation)")
    public Object around(ProceedingJoinPoint proceedingJoinPoint) throws Throwable {
        Object proceed = proceedingJoinPoint.proceed();
        String after = "after advice";
        return after + "____" + proceed;
    }
}

3. 在TestController ，test方法上面加上注解@TestAopAnnotation

 	@GetMapping(value = "/test")
    @TestAopAnnotation
    public String test(Integer id){
        return userService.test(id).toString();
    }

开启user-service模块

访问localhost:8080/test?id=2

返回

after advice____User{id=2, username='lisi'}，看到返回aop代理字符串after advice____，aop开启成功

系列文章目录

手写SpringBoot（一）之简易版SpringBoot
手写SpringBoot（二）之动态切换Servlet容器
手写SpringBoot（三）之自动配置
手写SpringBoot（四）之bean动态加载
手写SpringBoot（五）之整合AOP