使用MultipartFile[] 上传多个文件错误

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3395733618 剑圣 2020-12-29 16:04

一、该问题的重现步骤是什么？

1. 自己写一个接口，使用MultipartFile[] 上传多个文件

2. 就仅仅打印一下文件的文件名

二、你期待的结果是什么？实际看到的又是什么？

debug后发现，在此类的215行序列化成json的时候会抛异常

2.仅仅只上传单个文件，使用MultipartFile接收，不会序列化json出错；而使用 MultipartFile[] 接收文件，则会无法序列化成json打印错误日志，但是不影响使用。

3.使用 List<MultipartFile> 接收文件，会在此类的这一段进行处理，忽略掉打印

4.期望能够修复此问题，不再能在上传文件时使用 MultipartFile[] 数组接收文件时做类似的处理，不出现序列化json出错的问题；现在俺们已经改用List<MultipartFile>接收文件了，暂时可以用。

三、你正在使用的是什么产品，什么版本？在什么操作系统上？

2.7.0

四、请提供详细的错误堆栈信息，这很重要。

2020-12-29 15:51:08.377 ERROR 6624 --- [ XNIO-1 task-20] o.s.core.tool.jackson.JsonUtil : Unexpected IOException (of type java.io.FileNotFoundException): MultipartFile resource [fileArray] cannot be resolved to URL

com.fasterxml.jackson.databind.JsonMappingException: Unexpected IOException (of type java.io.FileNotFoundException): MultipartFile resource [fileArray] cannot be resolved to URL

at com.fasterxml.jackson.databind.JsonMappingException.fromUnexpectedIOE(JsonMappingException.java:341)

at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:3667)

at org.springblade.core.tool.jackson.JsonUtil.toJson(JsonUtil.java:53)

at org.springblade.core.log.aspect.RequestLogAspect.logIngArgs(RequestLogAspect.java:215)

at org.springblade.core.log.aspect.RequestLogAspect.aroundApi(RequestLogAspect.java:97)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)

at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)

at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:175)

at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749)

at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:95)

at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)

at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:749)

at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:691)

at org.springblade.resource.feign.AttachClient$$EnhancerBySpringCGLIB$$acfadbbe.uploadImageList(<generated>)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792)

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)

at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:517)

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:584)

at io.undertow.servlet.handlers.ServletHandler.handleRequest(ServletHandler.java:74)

at io.undertow.servlet.handlers.FilterHandler$FilterChainImpl.doFilter(FilterHandler.java:129)

at org.springblade.core.log.filter.LogTraceFilter.doFilter(LogTraceFilter.java:39)

at io.undertow.servlet.core.ManagedFilter.doFilter(ManagedFilter.java:61)