Spring自定义注解配置简单日志示例

package com.sam.annotation;
import java.lang.annotation.*;
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
public @interface MyLog {
    String requestUrl();
}

package com.sam.annotation;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
import java.lang.reflect.Method;
@Aspect //AOP 切面
@Component
public class MyLogAspect {
    //切入点
    @Pointcut(value = "@annotation(com.sam.annotation.MyLog)")
    private void pointcut() {
    }
    /**
     * 在方法执行前后
     *
     * @param point
     * @param myLog
     * @return
     */
    @Around(value = "pointcut() && @annotation(myLog)")
    public Object around(ProceedingJoinPoint point, MyLog myLog) {
        System.out.println("++++执行了around方法++++");
        String requestUrl = myLog.requestUrl();
        //拦截的类名
        Class clazz = point.getTarget().getClass();
        //拦截的方法
        Method method = ((MethodSignature) point.getSignature()).getMethod();
        System.out.println("执行了 类:" + clazz + " 方法:" + method + " 自定义请求地址:" + requestUrl);
        try {
            return point.proceed(); //执行程序
        } catch (Throwable throwable) {
            throwable.printStackTrace();
            return throwable.getMessage();
        }
    }
    /**
     * 方法执行后
     *
     * @param joinPoint
     * @param myLog
     * @param result
     * @return
     */
    @AfterReturning(value = "pointcut() && @annotation(myLog)", returning = "result")
    public Object afterReturning(JoinPoint joinPoint, MyLog myLog, Object result) {
//        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
//        HttpSession session = request.getSession();
        System.out.println("++++执行了afterReturning方法++++");
        System.out.println("执行结果：" + result);
        return result;
    }
    /**
     * 方法执行后 并抛出异常
     *
     * @param joinPoint
     * @param myLog
     * @param ex
     */
    @AfterThrowing(value = "pointcut() && @annotation(myLog)", throwing = "ex")
    public void afterThrowing(JoinPoint joinPoint, MyLog myLog, Exception ex) {
        System.out.println("++++执行了afterThrowing方法++++");
        System.out.println("请求：" + myLog.requestUrl() + " 出现异常");
    }
}

package com.sam.controller;
import com.sam.annotation.MyLog;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping(value = "/index")
public class IndexController {
    @MyLog(requestUrl = "/index请求")
    @RequestMapping(method = RequestMethod.GET)
    public String index() {
        return "index";
    }
}

++++执行了around方法++++
执行了 类:class com.yfs.controller.IndexController 方法:public java.lang.String com.yfs.controller.IndexController.index() 自定义请求地址:/index请求
++++执行了afterReturning方法++++
执行结果：index