MultipartResolver不起作用 [英] MultipartResolver is not working

问题描述

使用Maven和Spring Roo开发一个RESTFul Web服务。

在我的配置xml文件中，我定义了一个 multipartResolver bean，因为我正在上传300KB的文件：

 < bean id =multipartResolverclass =org.springframework .web.multipart.commons.CommonsMultipartResolver> 
< property name =maxUploadSizevalue =400000/> 
< property name =maxInMemorySizevalue =400000/> 
< / bean> 
  

成功上传文件并将其压入堆栈。这些文件是 CommonsMultipartFile 或 MultipartFile 对象（我对这两种类型的对象都有相同的现象）。一旦我弹出一个文件，我可以调用 getSize（）方法，我可以验证文件的大小是否正确。但是，一旦我调用 getInputStream（），我得到以下错误：文件已被移动 - 无法再读取。 / p>

在我的 multipartResolver 声明中做错了什么？有没有其他原因有这个错误？

谢谢

解决方案

<对getInputStream（）的调用被认为是获取客户端文件的输入流的请求。而且，由于文件已经上传，它说文件已被移动 - 不能再读

你也试图通过调用getInputStream（）？如果您想读取上传的文件，请使用上传位置的路径创建一个新的FileInputStream并访问文件内容。

I using developing a RESTFul web service using Maven and Spring Roo.

In my configuration xml file I defined a multipartResolver bean because I am uploading files of 300KB:

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize" value="400000" />
    <property name="maxInMemorySize" value="400000" />
</bean>

The files are uploaded successfully and pushed into a stack. These file are CommonsMultipartFile or MultipartFile objects (I have the same phenomenon for both type of objects). Once I pop a file, I can call getSize() method and I can verify that the size of the file is correct. But once I call getInputStream() I get the following error: File has been moved - cannot be read again.

Did I do something wrong in my multipartResolver declaration? Is there any other reason to have this error?

Thank you

解决方案

The call to getInputStream() is being recognized as a request to get the input stream of the file on the client-side. And as the file has been already uploaded it says "file has been moved - cannot read again"

also what are you trying to do by calling getInputStream()? If you want to read the uploaded file, create a new FileInputStream with the path of the uploaded location and access the file contents.

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