SpringBoot3.5.4 AOP环绕通知使用

依赖

web和aop依赖

复制代码
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.5.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>org.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>demo</description>
    <url/>
    <licenses>
        <license/>
    </licenses>
    <developers>
        <developer/>
    </developers>
    <scm>
        <connection/>
        <developerConnection/>
        <tag/>
        <url/>
    </scm>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <!-- Web 开发 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- AOP,用于实现自定义注解功能 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>

        <!-- 测试依赖,Spring Boot 3.x 用这个 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

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

</project>

自定义注解

复制代码
package com.example.demo.annotation;

import java.lang.annotation.*;

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

    String value() default "";
}

注解的AOP配置 环绕通知

复制代码
package com.example.demo.aop;

import com.example.demo.annotation.MyLog;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class MyLogAspect {
    @Around("@annotation(myLog)")
    public Object around(ProceedingJoinPoint joinPoint, MyLog myLog) throws Throwable {
        System.out.println("日志开始:" + myLog.value());
        Object result = joinPoint.proceed();
        System.out.println("日志结束:" + myLog.value());
        return result;
    }
}

在控制器中使用

复制代码
package com.example.demo.controller;

import com.example.demo.annotation.MyLog;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DemoController {




    @MyLog("xxx")
    @GetMapping("/hello")
    public String hello() {
        return "<h1>Hello World!</h1>";
    }
}

访问http://localhost:8080/hello

默认AOP是同步的,如果你希望异步

复制代码
@Around("@annotation(myLog)")
public Object around(ProceedingJoinPoint joinPoint, MyLog myLog) throws Throwable {
    System.out.println("日志开始:" + myLog.value());

    Object result = joinPoint.proceed();

    new Thread(() -> {
        System.out.println("异步保存日志:" + myLog.value());
    }).start();

    return result;
}
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