使用aop注解，实现日志增强，增强方式为前置，后置，环绕_使用前置增强和后置增强对业务方法的执行过程进行日志记录

KQC:

创建商品业务类，定义增删改查方法。
使用aop注解，实现日志增强，增强方式为前置，后置，环绕

运行结果：

项目代码整体布局：

代码：

pom.xml:

<?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>org.example</groupId>
  <artifactId>Test_0915_KQC</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>Test_0915_KQC Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <maven.compiler.source>8</maven.compiler.source>
    <maven.compiler.target>8</maven.compiler.target>
    <servlet.version>4.0.1</servlet.version>
    <jsp.version>2.2</jsp.version>
    <jstl.version>1.2</jstl.version>
    <spring.version>5.3.14</spring.version>
    <commons-dbcp.version>1.4</commons-dbcp.version>
    <mybatis.version>3.4.6</mybatis.version>
    <mybatis-spring.version>1.3.3</mybatis-spring.version>
    <mysql-connector-java.version>8.0.11</mysql-connector-java.version>
    <fastjson.version>1.2.78</fastjson.version>
  </properties>
  <dependencies>
    <!--  添加javaEE支持  -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>${servlet.version}</version>
      <!--  provided只在编译时支持，发布时不拷贝文件  -->
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>${jsp.version}</version>
      <!--  provided只在编译时支持，发布时不拷贝文件  -->
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>${jstl.version}</version>
    </dependency>
    <!-- 引入spring基础模块 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!--dbcp连接池  -->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>${commons-dbcp.version}</version>
    </dependency>
    <!--mybatis-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>
    <!--  mybatis spring整合  -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>${mybatis-spring.version}</version>
    </dependency>
    <!-- mybatis插件PageHelper -->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>5.1.0</version>
    </dependency>
    <!--通用mapper插件-->
    <dependency>
      <groupId>com.github.abel533</groupId>
      <artifactId>mapper</artifactId>
      <version>3.0.1</version>
    </dependency>
    <!--  mysql驱动类  -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql-connector-java.version}</version>
    </dependency>
    <!-- fastjson处理json数据 -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>${fastjson.version}</version>
    </dependency>
    <!-- lombok 简化实体内容 -->
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.24</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.11.2</version>
    </dependency>
    <dependency>
      <groupId>com.sun.mail</groupId>
      <artifactId>javax.mail</artifactId>
      <version>1.5.6</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.7.30</version>
    </dependency>
    <dependency>
      <groupId>com.github.xuwei-k</groupId>
      <artifactId>html2image</artifactId>
      <version>0.1.0</version>
    </dependency>
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.9.8</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-simple</artifactId>
      <version>1.7.25</version>
    </dependency>

  </dependencies>
</project>

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spring-2.xml:

<?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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">

    <bean id="goodsService" class="com.service.impl.GoodsServiceImpl"/>

    <context:component-scan base-package="com.advise"/>
    <aop:aspectj-autoproxy proxy-target-class="true"/>
<!--    <aop:aspectj-autoproxy/>-->

</beans>

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LogAdvise :

package com.advise;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;

@Component
@Aspect
public class LogAdvise {
    @Pointcut("execution(* com.service.impl.*.*(..))")
    public void pc(){

    }

    //@Before("execution(* com.service.impl.*.*(..))")
    @Before("pc()")
    public void bf(){
        System.out.println("前置通知：开始记录日志");
    }

    //@AfterReturning("execution(* com.service.impl.*.*(..))")
    @AfterReturning("pc()")
    public void af(){
        System.out.println("后置通知：结束记录日志");
    }

    //@Around("execution(* com.service.impl.*.*(..))")
    @Around("pc()")
    public void hr(ProceedingJoinPoint jp) throws Throwable{
        System.out.println("环绕通知：开始记录日志");
        System.out.println("业务方法:"+jp.getSignature());
        System.out.println("业务类："+jp.getTarget());
        jp.proceed();
        System.out.println("环绕通知：结束记录日志");
    }

    @AfterThrowing("pc()")
    public void yc(){
        System.out.println("异常通知:记录日志");
    }

}

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Goods :

package com.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Goods {
    private Integer goodsId;
    private String goodsName;
}

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IGoodsService :

package com.service;

import com.entity.Goods;
import java.util.List;

public interface IGoodsService {
    Integer delete(Integer id);
    Integer update(Goods goods);
    Integer insert(Goods goods);
    List<Goods> query();
}
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GoodsServiceImpl :

package com.service.impl;

import com.entity.Goods;
import com.service.IGoodsService;
import org.springframework.stereotype.Service;

import java.util.ArrayList;
import java.util.List;

@Service
public class GoodsServiceImpl implements IGoodsService {

    @Override
    public Integer delete(Integer id) {
        return 1;
    }

    @Override
    public Integer update(Goods goods) {
        System.out.println("。。。。。更新业务。。。。。");
        return 1;
    }

    @Override
    public Integer insert(Goods goods) {
        System.out.println("。。。。。插入业务。。。。。");
        return 1;
    }

    @Override
    public List<Goods> query() {
        return new ArrayList<>();
    }
}

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TestAop :

package com.test;

import com.entity.Goods;
import com.service.IGoodsService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestAop {
    public static void main(String[] args) {
        ApplicationContext ac = new ClassPathXmlApplicationContext("spring-2.xml");
        IGoodsService iGoodsService=ac.getBean(IGoodsService.class);
        iGoodsService.update(new Goods());
        iGoodsService.insert(new Goods());
    }
}

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异常：

①Exception in thread “main” org.springframework.aop.AopInvocationException:

解决：

②SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”.

SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

参考：出现SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder“.的解决方法https://blog.csdn.net/weixin_47872288/article/details/122358131

解决：

<dependency>
　　<groupId>org.slf4j</groupId>
　　<artifactId>slf4j-simple</artifactId>
　　<version>1.7.25</version>
</dependency>
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