com.fasterxml.jackson.databind.JsonMappingException: Infinite recursion (StackOverflowError)
【代码】com.fasterxml.jackson.databind.JsonMappingException: Infinite recursion (StackOverflowError)
·
在项目中嵌入RabbitMQ时,出现了以下报错:
com.fasterxml.jackson.databind.JsonMappingException: Infinite recursion (StackOverflowError)
(through reference chain:
java.lang.reflect.Parameter["declaringExecutable"]
-> java.lang.reflect.Method["parameters"]
-> java.lang.reflect.Parameter[0]
-> java.lang.reflect.Parameter["declaringExecutable"]
-> java.lang.reflect.Method["parameters"]
-> java.lang.reflect.Parameter[0]
-> java.lang.reflect.Parameter["declaringExecutable"]
-> java.lang.reflect.Method["parameters"]
-> java.lang.reflect.Parameter[0]
-> java.lang.reflect.Parameter["declaringExecutable"]
-> java.lang.reflect.Method["parameters"]
-> java.lang.reflect.Parameter[0]
-> java.lang.reflect.Parameter["declaringExecutable"]
-> java.lang.reflect.Method["parameters"]
-> java.lang.reflect.Parameter[0]
-> java.lang.reflect.Parameter["declaringExecutable"]
-> java.lang.reflect.Method["parameters"]
-> java.lang.reflect.Parameter[0]
-> java.lang.reflect.Parameter["declaringExecutable"]
-> java.lang.reflect.Method["parameters"]
-> java.lang.reflect.Parameter[0]
-> java.lang.reflect.Parameter["declaringExecutable"]
-> java.lang.reflect.Method["parameters"]
-> java.lang.reflect.Parameter[0]
-> java.lang.reflect.Parameter["declaringExecutable"]
-> java.lang.reflect.Method["parameters"]
出现这个错误的原因是fastjson在将对象转成json字符串时出现了错误,具体原因是RabbitMQ的Message对象不能转成json串,具体原因不太清楚,出现这个错误是我写了aop方法用于增强所有方法,让他打印参数列表和返回值,在打印时将对象转成了JSON字符串,然后在遇到Message对象后就出现了如图上转换失败的原因,解决办法就是忽略这个具体方法或者优化一下AOP的增强方法,相关代码如下:
AOP增强方法
package com.atguigu.ssyx.common.utils;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import java.lang.reflect.Method;
import java.lang.reflect.Parameter;
import java.text.SimpleDateFormat;
import java.util.Date;
@Aspect
@Component
public class MyAspect {
Logger logger = LoggerFactory.getLogger(getClass());
/**
* 在目标方法执行完成之后执行增强逻辑
* pointcut切入点表达式指定了要增强的方法
* returning属性指定了目标方法的返回值,并将其传递给增强方法的参数
*/
@AfterReturning(pointcut = "execution(* com.atguigu.ssyx..*(..)) && !within(com.atguigu.ssyx..SkuReceiver)", returning = "result")
// joinPoint表示连接点,可以获取到目标方法的信息
public void afterMethodExecution(JoinPoint joinPoint, Object result) {
// 切入点获取签名获取方法名称
String methodName = joinPoint.getSignature().getName();
// 切入点获取传入参数
Object[] arguments = joinPoint.getArgs();
// 切入点通过反射getClass获取类名
String className = joinPoint.getTarget().getClass().getName();
// 打印类名.方法名 参数列表
logger.info("\n================"+"方法名称:"+ className + "." + methodName +"=============================================" );
logger.info("参数列表:");
// 如果参数列表不为空并且长度大于0
if (arguments != null && arguments.length > 0) {
// 切入点获取签名
Signature signature = joinPoint.getSignature();
Method method = getMethod(signature);
if (method != null) {
// 通过method对象获取参数列表
Parameter[] parameters = method.getParameters();
// for循环打印参数列表
for (int i = 0; i < parameters.length; i++) {
logger.info(parameters[i].getName() + ":" + getArgumentValue(arguments[i]) + ",");
}
}
} else {
System.out.print("无");
}
try {
// 打印返回值,将对象转成json串格式化输出
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.enable(SerializationFeature.INDENT_OUTPUT);
System.out.print("返回值:\n" + objectMapper.writeValueAsString(result));
} catch (JsonProcessingException e) {
e.printStackTrace();
}
logger.info("===================================="+printTime()+"=============================");
logger.info("");
}
private Method getMethod(Signature signature) {
if (signature instanceof MethodSignature) {
MethodSignature methodSignature = (MethodSignature) signature;
return methodSignature.getMethod();
}
return null;
}
private String getArgumentValue(Object argument) {
if (argument != null) {
try {
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.enable(SerializationFeature.INDENT_OUTPUT);
return objectMapper.writeValueAsString(argument);
} catch (JsonProcessingException e) {
e.printStackTrace();
}
}
return "null";
}
private String printTime(){
// 创建日期对象
Date currentDate = new Date();
// 创建日期格式化对象,指定日期格式
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
// 格式化日期对象为字符串
String formattedDate = dateFormat.format(currentDate);
// 打印当前时间
return("当前方法执行时间: " + formattedDate);
}
}
MQ消息队列接收端
package com.atguigu.ssyx.receiver;
import com.atguigu.ssyx.common.constant.MqConst;
import com.atguigu.ssyx.search.service.SkuService;
import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.Exchange;
import org.springframework.amqp.rabbit.annotation.Queue;
import org.springframework.amqp.rabbit.annotation.QueueBinding;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import java.io.IOException;
/**
*MQ消息队列的接收端
*/
@Component
public class SkuReceiver {
@Autowired
private SkuService skuService;
/**
* 上架时消息队列的消费端
* @param skuId
* @param message
* @param channel
* @throws IOException
*/
@RabbitListener(bindings = @QueueBinding(
value = @Queue(value = MqConst.QUEUE_GOODS_UPPER, durable = "true"),
exchange = @Exchange(value = MqConst.EXCHANGE_GOODS_DIRECT),
key = {MqConst.ROUTING_GOODS_UPPER}
))
public void upperSku(Long skuId, Message message, Channel channel) throws IOException {
if (null != skuId) {
// 上传商品操作
skuService.upperSku(skuId);
}
/**
* 第一个参数:表示收到的消息的标号
* 第二个参数:如果为true表示可以签收多个消息
*/
channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
}
/**
* 商品下架
* @param skuId
*/
@RabbitListener(bindings = @QueueBinding(
value = @Queue(value = MqConst.QUEUE_GOODS_LOWER, durable = "true"),
exchange = @Exchange(value = MqConst.EXCHANGE_GOODS_DIRECT),
key = {MqConst.ROUTING_GOODS_LOWER}
))
public void lowerSku(Long skuId, Message message, Channel channel) throws IOException {
if (null != skuId) {
// 调用es将商品下架
skuService.lowerSku(skuId);
}
channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
}
}
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