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    <p>First of all, this isn't necessarily a JSP problem. Obtaining list of network devices isn't to be done in a JSP file, but in a real Java class. JSP is just a view technology.</p> <p>Back to the actual problem, to start you can use the <a href="http://java.sun.com/javase/6/docs/api/java/net/NetworkInterface.html" rel="nofollow noreferrer">java.net.NetworkInterface</a> API for this.</p> <p>First create a Servlet which obtains a <code>List</code> of <code>NetworkInterface</code>s in the <code>doGet()</code> method, puts it in the request scope and forwards the request to a JSP. As <code>NetworkInterface</code> class already conforms the Javabean spec with several useful getter methods, we don't need to wrap it in another Javabean class and can just reuse it.</p> <pre><code>protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { List&lt;NetworkInterface&gt; networkInterfaces = Collections.list(NetworkInterface.getNetworkInterfaces()); request.setAttribute("networkInterfaces", networkInterfaces); } catch (SocketException e) { throw new ServletException("Cannot obtain networkinterfaces.", e); } request.getRequestDispatcher("/WEB-INF/networkinterfaces.jsp").forward(request, response); } </code></pre> <p>Map this servlet in <code>web.xml</code> on an <code>url-pattern</code> of for example <code>/networkinterfaces</code>. This servlet would be accessible by <code>http://example.com/context/networkinterfaces</code>.</p> <p>Now create a JSP file <code>networkinterfaces.jsp</code> which you place in <code>WEB-INF</code> to prevent from direct access by <code>http://example.com/context/networkinterfaces.jsp</code> (so that users are forced to use the servlet). Use the <a href="http://download.java.net/maven/1/jstl/jars/jstl-1.2.jar" rel="nofollow noreferrer">JSTL</a> (just put JAR in <code>/WEB-INF/lib</code> if not done yet) <a href="http://java.sun.com/products/jsp/jstl/1.1/docs/tlddocs/c/forEach.html" rel="nofollow noreferrer">c:forEach</a> tag to iterate over the <code>List</code> and access the getters by <a href="http://java.sun.com/j2ee/1.4/docs/tutorial/doc/JSPIntro7.html" rel="nofollow noreferrer">EL</a>.</p> <pre><code>&lt;c:forEach items="${networkInterfaces}" var="networkInterface"&gt; Name: ${networkInterface.name}&lt;br&gt; Display name: ${networkInterface.displayName}&lt;br&gt; MTU: ${networkInterface.MTU}&lt;br&gt; &lt;c:forEach items="${networkInterface.interfaceAddresses}" var="interfaceAddress" varStatus="loop"&gt; IP address #${loop.index + 1}: ${interfaceAddress.address}&lt;br&gt; &lt;/c:forEach&gt; &lt;hr&gt; &lt;/c:forEach&gt; </code></pre> <p>That should be it.</p> <p><strong>Edit</strong> to have it "visually presented", either use Java 2D API to generate an image or use HTML/CSS to position the elements based on the information gathered in servlet.</p>
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    1. POConstruct Network Topology
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    1. COThe code that you have posted would just help me list the network elements, but I need to show them in a Visual format, that the problem all abt :)
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    2. COEither use Java 2D API to creat a png/gif or play smart with the information and a shot of right HTML elements and CSS styles.
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