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    <p>This is <strong>not</strong> the right way to process a file upload in Servlet 3.0. You should instead be using <a href="http://docs.oracle.com/javaee/6/api/javax/servlet/annotation/MultipartConfig.html" rel="nofollow noreferrer"><code>@MultipartConfig</code></a> annotation on the servlet and be using <a href="http://docs.oracle.com/javaee/6/api/javax/servlet/http/HttpServletRequest.html#getPart%28%29" rel="nofollow noreferrer"><code>HttpServletRequest#getPart()</code></a> method to obtain the uploaded file, which was introduced in Servlet 3.0.</p> <p>The <code>org.apache.tomcat.util.fileupload</code> package contains exactly those classes which are doing all "behind the scenes" work of this new Servlet 3.0 feature. You shouldn't be using them directly, like as that you shouldn't be using <code>sun.*</code> classes when using Java SE on a Sun/Oracle JVM, and that you shouldn't be using <code>com.mysql.*</code> classes when using JDBC on a MySQL DB. It seems that you got confused by examples targeted at Servlet 2.5 or older using <a href="http://commons.apache.org/fileupload" rel="nofollow noreferrer">Apache Commons FileUpload</a> which happens to use the same classnames.</p> <p>Using Tomcat-specific classes would tight-couple your webapp to the specific Tomcat version and makes your webapp <strong>unportable</strong> to other Servlet 3.0 compatible containers and even to a different Tomcat version as you encountered yourself. You should in this particular case stick to standard classes from the <code>javax.servlet</code> package.</p> <p>The right way is shown in the 2nd part of this answer: <a href="https://stackoverflow.com/questions/2422468/how-to-upload-files-to-server-using-jsp-servlet/2424824#2424824">How to upload files to server using JSP/Servlet?</a></p> <p>All with all, this kickoff example should get you started:</p> <pre class="lang-html prettyprint-override"><code>&lt;form action="upload" method="post" enctype="multipart/form-data"&gt; &lt;input type="text" name="status" /&gt; &lt;input type="file" name="uploadedFile" /&gt; &lt;input type="submit" /&gt; &lt;/form&gt; </code></pre> <p>with</p> <pre><code>@WebServlet("/upload") @MultipartConfig public class UploadServlet extends HttpServlet { @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String status = request.getParameter("status"); // Retrieves &lt;input type="text" name="status"&gt; Part uploadedFile = request.getPart("uploadedFile"); // Retrieves &lt;input type="file" name="uploadedFile"&gt; InputStream content = uploadedFile.getInputStream(); // ... (do your job here) } } </code></pre> <p>That's all.</p>
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    1. POFile upload error in servlet while using Apache Tomcat 7.0.40.0
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    1. POFile upload error in servlet while using Apache Tomcat 7.0.40.0
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    1. COI am going to implement the file upload from Android tablet to the servlet in the remote tomcat server by packing the httppost as the sending request instead of the fileStream. Is this method also feasible as long as the Servlet file is here with all required jars ?
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    2. COThis doesn't require any additional JARs. This is already out the box supported in Servlet 3.0. Perhaps there is where you made the mistake: you should **absolutely not** have copies of servlet-container specific JARs in your webapp. See also e.g. http://stackoverflow.com/q/4076601/ As to the HttpPost in Android, see also http://stackoverflow.com/a/6917303 and http://stackoverflow.com/a/5205548. Note: also this doesn't require any additional JARs, it's already out the box supported in Android.
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