Multiple file input type upload in grails

问题

When I use the 'multiple' attribute I can't get it to work:

<input type="file" id="files" name="files[]" multiple />

The controller action method body:

request.getFileNames().each {
    println it
}

The problem is that this iteration returns only one file. Can anyone help me to obtain all the files uploaded? (I'm using grails 2.0.3)

回答1:

you have to get at the multiple file part of the request.

I think you can do

request.getMultiFileMap()

or

request.multiFileMap.documentFile

回答2:

Grails 2 uses Spring 3 which uses the MultipartRequest class to handle this.

This class has a getFiles(String name) function which you can use in your case. So this will result in the following code:

request.getFiles("files[]").each { file ->
    log.debug(file.originalFilename)
}

回答3:

I'm using this

request.multiFileMap.get("files[]")

来源：https://stackoverflow.com/questions/10425891/multiple-file-input-type-upload-in-grails