一：写一个自定义注解 TrailEnabled
package com.agency.admin.annotation;import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;/*** Created by shenguoliang on 2019/2/22 0022.*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE})
public @interface TrailEnabled{String title() default "";
}
二：切面拦截，具体操作
package com.agency.admin.aspect;import com.agency.admin.annotation.TrailEnabled;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
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.springframework.stereotype.Component;/*** Created by shenguoliang on 2019/2/22 0022.*/
@Aspect
@Component("logAspect")
@Slf4j
public class LogAspect {// 配置织入点@Pointcut("@within(com.agency.admin.annotation.TrailEnabled)")public void logPointCut() {}/*** 前置通知 用于拦截操作，在方法返回后执行* @param joinPoint 切点*/@AfterReturning(pointcut = "logPointCut()")public void doBefore(JoinPoint joinPoint) {handleLog(joinPoint, null);}/*** 拦截异常操作，有异常时执行** @param joinPoint* @param e*/@AfterThrowing(value = "logPointCut()", throwing = "e")public void doAfter(JoinPoint joinPoint, Exception e) {handleLogE(joinPoint, e);}private void handleLog(JoinPoint joinPoint, Exception e) {try {// 获得注解// 获得注解TrailEnabled controllerLog = getAnnotationLog(joinPoint);if (controllerLog == null) {return;}// 参数名String[] argNames = ((MethodSignature)joinPoint.getSignature()).getParameterNames();//传入的参数Object[] arguments = joinPoint.getArgs();// 获得方法名称String className = joinPoint.getTarget().getClass().getName();String methodName = joinPoint.getSignature().getName();String title = controllerLog.title();//打印日志，如有需要还可以存入数据库log.info("--参数名--:" + JSON.toJSONString(argNames));log.info("--参数值--:" + JSON.toJSONString(arguments));log.info(">>>>>>>>>>>>>模块名称：{}",title);log.info(">>>>>>>>>>>>>类名：{}",className);log.info(">>>>>>>>>>>>>方法名：{}",methodName);//这里可以根据需求把日志存入数据库...} catch (Exception exp) {// 记录本地异常日志log.error("==前置通知异常==");log.error("异常信息:{}", exp.getMessage());exp.printStackTrace();}}private void handleLogE(JoinPoint joinPoint, Exception e) {try {// 获得注解TrailEnabled controllerLog = getAnnotationLog(joinPoint);if (controllerLog == null) {return;}// 获得方法名称String className = joinPoint.getTarget().getClass().getName();String methodName = joinPoint.getSignature().getName();String title = controllerLog.title();//打印日志，如有需要还可以存入数据库log.info(">>>>>>>>>>>>>模块名称：{}",title);log.info(">>>>>>>>>>>>>类名：{}",className);log.info(">>>>>>>>>>>>>方法名：{}",methodName);} catch (Exception exp) {// 记录本地异常日志log.error("==前置通知异常==");log.error("异常信息:{}", exp.getMessage());exp.printStackTrace();}}/*** 是否存在注解，如果存在就获取*/private static TrailEnabled getAnnotationLog(JoinPoint joinPoint) throws Exception {//如果你的自定义注解是在方法上，可以这样判断/*Signature signature = joinPoint.getSignature();MethodSignature methodSignature = (MethodSignature) signature;Method method = methodSignature.getMethod();if (method != null) {return method.getAnnotation(TrailEnabled.class);}*///自定义注解在controller层类上Signature signature = joinPoint.getSignature();Class cls = signature.getDeclaringType();boolean isTrailEnabled = cls.isAnnotationPresent(TrailEnabled.class);if(isTrailEnabled){//类名前注解return (TrailEnabled)cls.getAnnotation(TrailEnabled.class);}else{return null;}}}
三：前面两步都写好了之后，只需要在你想拦截的controller 类上加上你第一步创建的自定义注解@TrailEnabled
就好了。
编译没问题然后就可以启动项目测试一下效果；
如图：
