CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100

I am teaching a web development course at a CS department, I wrote most of the final test by now, each question focus on a specific feature or a specific technology,

public class FeedUpdaterServlet extends HttpServlet { public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException { PrintWriter out = resp.getWriter(); req.setCharacterEncoding("utf-8"); resp.setLocale(Locale.TAIWAN); resp.setContentType("text/html; charset=utf-8"); resp.setCharacterEncoding("utf-8"); resp.getWriter().println("Hello, world!!@!"); out.println("我是人"); //some chinese character out.println(resp.getCharacterEncoding()); out.flush(); out.close(); } } web xml <locale-encoding-mapping-list> <locale-encoding-mapping> <locale>zh_TW</locale> <encoding>utf-8</encoding> </locale-encoding-mapping> </locale-encoding-mapping-list> Output: Hello, world!!@! ??? ISO-8859-1 It seems that the encoding of the respond can not be changed, what is happening???

I have the following HTML. I want the URL 'http://www.google.com' to be inserted in the database table on click of the link. <a href="http://www.google.com" onclick="insert.jsp">Google</a> The insert.jsp contains the connectivity code which works fine on the click of the button, but above code is not working.

I am using bufferedImage and then by using ImageIO.write(bufferedImage,"jpg" ,Outputstream) but after deploying i got error as can't read input file

Following is a snippet that is meant to fetch the data from the database. But when i click the submit button to see the data, the browser keeps on looking for the data but never displays anything (the browser doesn't show the next page but keeps on looking on the same page) . I don't know what the problem is. Snippet that fetches the data : public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException,ServletException { try { Context context = new InitialContext(); DataSource dataSource = (DataSource)context.lookup("java:comp/env/jdbc/MyDatasource"); Connection connection = dataSource.getConnection(); String sqlStatement = "SELECT * FROM INFORMATION"; PreparedStatement statement = connection.prepareStatement(sqlStatement); ResultSet set = statement.executeQuery(); PrintWriter writer = response.getWriter(); response.setContentType("text/plain");

I try to validate a field with ajax and a function which verify that the value is not already in base. All examples I found are with php ; how to do with java ? JSP code : <form id="FLoginNew" action="Loginnew" method="post"> ..... <script> $(document).ready(function(e) { $("#FLoginNew").validationEngine('attach', {promptPosition : "centerRight", scroll: false, validationEventTrigger: "blur", autoHidePrompt:true, autoHideDelay:3000 }); }); </script> jquery.ValidationEngine-fr.js altered : "ajaxLoginCall": { "url": "myapp.selvlets.DoublonLoginServlet", "extraDataDynamic": ['#login'], "alertText": "* Ce login est déjà pris", "alertTextOk": "* Ce login est disponible", "alertTextLoad": "* Chargement, veuillez att