要使用自定义注解必须首先在配置文件中开启注解模式

<!--开启springMVC注解模式--><!--面向切面配置--><context:component-scan base-package="com.test"/><mvc:annotation-driven  /><aop:aspectj-autoproxy /><aop:config proxy-target-class="true"/>

自定义注解

package com.test.aspect;import java.lang.annotation.*;@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Log {/*模块*/String title() default "";/*功能*/String action() default "";
}

切面类

package com.test.aspect;import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;import java.lang.reflect.Method;/*** @ClassName LogAspect* @Description* @Author 周志强* @Date 2021/5/12 12:27* @Version 1.0*/
@Aspect
@Component("logAspect")
public class LogAspect {private static Logger log= LoggerFactory.getLogger(LogAspect.class);//配置切入点@Pointcut("@annotation(com.test.aspect.Log)")public void logPointCut(){}//后置通知 用于拦截操作，在方法返回后执行@AfterReturning(pointcut = "logPointCut()")public void doBefore(JoinPoint joinPoint){handelLog(joinPoint,null);}//拦截异常操作，有异常时执行@AfterThrowing(value = "logPointCut()",throwing = "e")public void doAfter(JoinPoint joinPoint,Exception e){handelLog(joinPoint,e);}public void handelLog(JoinPoint joinpoint,Exception e){try {Log annotationLog = getAnnotationLog(joinPoint);if (annotationLog == null) {return;}String className = joinPoint.getTarget().getClass().getName();String methodName = joinPoint.getSignature().getName();String action = annotationLog.action();String title = annotationLog.title();//打印日志，如有需要还可以存入数据库logger.info(">>>>>>>>>>>>>模块名称：{}",title);logger.info(">>>>>>>>>>>>>操作名称：{}",action);logger.info(">>>>>>>>>>>>>类名：{}",className);logger.info(">>>>>>>>>>>>>方法名：{}",methodName);}catch (Exception exception){logger.error("=前置通知异常=");logger.error("异常信息：{}",e.getMessage());e.printStackTrace();}}private static Log getAnnotationLog(JoinPoint joinPoint) throws Exception {Signature signature = joinPoint.getSignature();MethodSignature methodSignature= (MethodSignature) signature;Method method = methodSignature.getMethod();if (method != null) {return  method.getAnnotation(Log.class);}return null;}
}