How do I make a JSP page to upload an image to a MySQL database?

Question

I have a web project written in JSP with a couple of Java classes for the back-end. I want to make a page where the user uploads an image and this gets saved in a database.

I have a page where the user uploads the image, with a form like this:

<form action="UploadImage.jsp" method="post" enctype="multipart/form-data">
<input type="file" name="file" accept="image/*">
<input type="submit" name="submit" value="Upload Image">

I want to have my UploadImage.jsp file save this image to a LongBLOB object in a MySQL database. I tried using request.getParameter(), and request.getPart(), but they both return null, and any attempts to use these results in a NullPointerException.

I've tried looking online, but all the solutions involve using a servlet, instead of a JSP page. And yes, I know using JSP is not best practice, but for the purposes of this project, it's what I have to use.

Answer 1

You can use the ServletFileUpload class to parse the request and upload multiple files, in your case the image, to a temp directory on the server and then you'll just need to store the file's location as a path in the database.

ServletContext context = pageContext.getServletContext();    
String filePath = "c:\\apache-tomcat\\webapps\\images\\";

DiskFileItemFactory factory = new DiskFileItemFactory();      
factory.setRepository(new File("c:\\temp"));
ServletFileUpload uploader = new ServletFileUpload(factory);

try { 
    List files = upload.parseRequest(request);
    Iterator<FileItem> iter = fileItems.iterator();

    while (iter.hasNext()) {
        FileItem file = iter.next();            
        File serverFile = new File(filePath + 
            file.getName().substring(fileName.lastIndexOf("\\")));            
        file.write(serverFile);
    }
} catch(Exception ex) {
    System.out.println(ex);
}

Answer 2

You have to use the

Part p=request.getpart("file");

inputstream is=p.getinputstream(p);

byte[] b=Ioutils.getBytes(is);

Then You can use Setbytes to stored in mysql

And you also declared the multipart annotations on your servlet before class name