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  • Spring Web FLow Asynchronous File upload

    I have made a Spring Web flow application that uploads file using Multipart upload.
    It works fine in case of normal form submits.

    But in case of Asynchronous submit ,it is throwing exception:

    Map key 'file' has value [HomeBackground.jpg] that is not of expected type [interface org.springframework.web.multipart.MultipartFile], instead it is of type [java.lang.String]

    This exception comes when I try to retreive file into MultipartFile object of Spring.

    I am using Ajax.Updator of prototype.js for async form submit.

    Please help.