Java – how do I receive multiple files in InputStream and process them accordingly?

I want to receive multiple files uploaded from the client I uploaded multiple files and requested my server (Java) using Jax - RS (Jersey)

I have the following code,

@POST
    @Consumes(MediaType.MULTIPART_FORM_DATA)
    public void upload(@Context UriInfo uriInfo,@FormDataParam("file") final InputStream is,@FormDataParam("file") final FormDataContentDisposition detail) {
FileOutputStream os = new FileOutputStream("Path/to/save/" + appropriatefileName);
    byte[] buffer = new byte[1024];
            int length;
            while ((length = is.read(buffer)) > 0) {
                os.write(buffer,length);
            }
}

How to write files separately on the server side uploaded by the client

For example I uploaded my_ File. txt,My_ File. PNG,My_ File. Doc and other documents I need to write my on the server side_ File. txt,My_ File. Doc

How can I do this?

Solution

You can try something like this:

@POST
@Consumes(MediaType.MULTIPART_FORM_DATA)
public void upload(FormDataMultiPart formParams)
{
    Map<String,List<FormDataBodyPart>> fieldsByName = formParams.getFields();

    // Usually each value in fieldsByName will be a list of length 1.
    // Assuming each field in the form is a file,just loop through them.

    for (List<FormDataBodyPart> fields : fieldsByName.values())
    {
        for (FormDataBodyPart field : fields)
        {
            InputStream is = field.getEntityAs(InputStream.class);
            String fileName = field.getName();

            // TODO: SAVE FILE HERE

            // if you want media type for validation,it's field.getMediaType()
        }
    }
}