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POWhy image is not showed on JSP page
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  1. POWhy image is not showed on JSP page
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    copied!<p>I'm a bit lost with following scenario: </p> <ol> <li>user upload image - upload.jsp (multipart/form-data)</li> <li>servlet do all dirty job (save image, get name, save name, redirect to display.jsp)</li> <li>on the display.jsp, just uploaded image should be presented</li> </ol> <p>Unfortunately the display.jsp page is empty. When I look at source page under firefox, everything seems to be fine, valid link to the image is provided. </p> <pre><code>&lt;img src="/UploadTest/avatar/55_445194458350473498.png" border=0 width="48px" height="48px"/&gt; </code></pre> <p>But under Media info I can see some weird infos: </p> <pre><code>Location: http://localhost:8084/UploadTest/avatar/55_445194458350473498.png Type: text/html Size: Unknown (not cached) Dimensions: 0px x 0px (scaled to 0px x 16px) </code></pre> <p>Here is code used for uploading, processing and displaying picture: </p> <p><strong>upload.jsp</strong></p> <pre><code>&lt;form action="Upload" method="post" enctype="multipart/form-data"&gt; &lt;label for="file"&gt;File:&lt;/label&gt; &lt;input type="file" id="file" name="file"&gt; &lt;input type="submit" value="submit"&gt; &lt;/form&gt; </code></pre> <p><strong>Upload.java</strong></p> <p>(The MultipartMap servlet belongs to BalusC, <a href="http://balusc.blogspot.com.au/2009/12/uploading-files-in-servlet-30.html" rel="nofollow">http://balusc.blogspot.com.au/2009/12/uploading-files-in-servlet-30.html</a>)</p> <pre><code>package test; import java.io.File; import java.io.IOException; import java.util.Arrays; import javax.servlet.ServletException; import javax.servlet.annotation.MultipartConfig; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpSession; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import test.MultipartMap; @WebServlet(urlPatterns = { "/Users/Thomas/NetBeansProjects/UploadTest/web/Upload" }) @MultipartConfig(location = "/Users/Thomas/NetBeansProjects/UploadTest/web/avatar", maxFileSize = 10485760L) // 10MB. public class UploadServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { } @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { MultipartMap map = new MultipartMap(request, this); File file = map.getFile("file"); String filename = file.getName(); HttpSession session = request.getSession(); session.setAttribute("filename", filename); request.getRequestDispatcher("/display.jsp").forward(request, response); } } </code></pre> <p><strong>display.jsp</strong> </p> <pre><code>&lt;%@page contentType="text/html" pageEncoding="UTF-8"%&gt; &lt;!DOCTYPE html&gt; &lt;html&gt; &lt;head&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=UTF-8"&gt; &lt;title&gt;JSP Page&lt;/title&gt; &lt;/head&gt; &lt;body&gt; &lt;div&gt; &lt;img src="${pageContext.request.contextPath}/avatar/${filename}" border=0 width="48px" height="48px"/&gt; &lt;div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>If I replace, in display.jsp, ${filename} with static name of the particular image uploaded before, there is no problem with displaying so I suppose the images are processed correctly just something is missing on forward side? </p> <p>By the way: when debugger is active everything is OK but when switch off the problem is back. </p> <p>Cheers,</p> <p>Thomas</p>
 

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