We cannot transfer large images in the first demo due to the problem of android operating system. A solution to that problem is the direct binary file transfer ability of org.apache.commons. fileupload.* package. The classes, FileItem, disk.DiskFileItemFactory, portlet.PortletFileUpload and servlet.ServletFileUpload, are used for binary file transfer by using HttpServletRequest and HttpServletResponse. We do not need raw char image transfer anymore because of servlet file upload technique.
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