Question

我有一个返回对象的方法。我想使用spring AOP在我的日志中打印该对象的值。我怎样才能做到这一点？

请帮忙！

Answer 1

将@AfterReturning与returnValue参数一起使用。

然后您可以对返回的对象进行interogate 这是一个示例，我在所有内容上执行此操作，但在存储库中获取方法

@AfterReturning(value = "@target(org.springframework.stereotype.Repository) && !execution(* get*(..))", returning = "returnValue")
public void loggingRepositoryMethods(JoinPoint joinPoint, Object returnValue) {
    String classMethod = this.getClassMethod(joinPoint);



     if(returnValue !=null)
     {
       //test type of object get properties (could use reflection)
       log it out
     }
     else
     {
         //do logging here probably passing in (joinPoint, classMethod);
     }
}

Answer 2

在我们的例子中，大多数时候我们返回spring modal的实体类，所以我们用所需的最小信息覆盖所有实体类的toString方法并打印如下

@AfterReturning(pointcut = "within(@org.springframework.stereotype.Service *)", returning = "result")
public void logAfterReturning(JoinPoint joinPoint, Object result) {
    logger.info(" ###### Returning for class : {} ; Method : {} ", joinPoint.getTarget().getClass().getName(), joinPoint.getSignature().getName());
    if (result != null) {
        logger.info(" ###### with value : {}", result.toString());
    } else{
        logger.info(" ###### with null as return value.");
    }
}

Answer 3

只需记录joinPoint.proceed（）方法的返回值......

就可以了

Answer 4

花了一段时间，所以放在这里...

package com.mycomp.poc.JcachePoc.config;

import java.util.HashMap;
import java.util.Map;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Component;


import lombok.extern.slf4j.Slf4j;

@Aspect
@Component
@Slf4j
public class LoggingAspectConfig {

    private static LoggingAspectConfig loggingAspectConfig;


    @Bean
    public LoggingAspectConfig createBean() {
        if(loggingAspectConfig==null)
        return new LoggingAspectConfig();
        else
            return loggingAspectConfig;
    }


    private LoggingAspectConfig () {

    }

    @Before("execution(* com.mycom.poc.JcachePoc.service*.*.*(..)) && @annotation(Log)")
    public void logBefore(JoinPoint joinPoint) {
        if(log.isDebugEnabled()) {
            Object[] args= joinPoint.getArgs();
            Map<String, String> typeValue= new HashMap<>();
            for(Object obj: args) {
                if(obj!=null) {
                    typeValue.put(obj.getClass().getName(), obj.toString());
                }
            }
            //log.debug("calling Method:"+joinPoint.getSignature().getDeclaringTypeName()+", "+joinPoint.getSignature().getName()+", Parameter:-> "+ typeValue);
        }
    }

    @AfterReturning(pointcut = "execution(* com.mycom.poc.JcachePoc.service*.*.*(..)) && @annotation(Log)", returning = "result")
    public void logAfter(JoinPoint joinPoint, Object result) {
        if (log.isDebugEnabled() && result!=null) {         
            log.debug("Method returned:" + 
                    joinPoint.getSignature().getName() + ", Result: " + result.getClass().getName()+" -->"+result);
        }
        //log.info(gson.toJson(result));
    }

}

使用spring aop记录方法的返回值

4 个答案: