message An exception occurred processing JSP page /mailbox.jsp at line 19 description The server encountered an internal error that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: An exception occurred processing JSP page /mailbox.jsp at line 19 16: <span class="col-sm-3 title-message">Date: </span><br /> 17: <hr> 18: <div class="col-sm-12"> 19: <c:forEach items="${sessionScope.User_messages}" var="item"> 20: ${item}<br> 21: </c:forEach> 22: </div> Such error turns out, null pointer exception undertakes
@Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { resp.setContentType("text/html"); HttpSession session = req.getSession(true); MessageDAO msg = new MessageOracleDAO(); User user = new User(); try { if(session.getAttribute("authUser") != null) { user.setEmail(session.getAttribute("authUser").toString()); session.setAttribute("User_messages", msg.inboxMessage(user)); } } catch (SQLException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); } req.getRequestDispatcher("mailbox.jsp").forward(req,resp); } Actually method. And jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" extends="fpm.servlets.SecureJSP"%> <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <html> <head> <title>Your account</title> <link rel="stylesheet" type="text/css" href="bootstrap/css/bootstrap.css"/> <link rel="stylesheet" type="text/css" href="bootstrap/css/styles.css"/> <script type="text/javascript" src="bootstrap/js/mail_script.js"></script> </head> <body> <jsp:include page="header.jsp"/> <jsp:include page="menu.jsp"/> <div class="col-sm-10 container-page"> <span class="col-sm-3 title-message">From: </span> <span class="col-sm-6 title-message">Message: </span> <span class="col-sm-3 title-message">Date: </span><br /> <hr> <div class="col-sm-12"> <c:forEach items="${sessionScope.User_messages}" var="item"> ${item}<br> </c:forEach> </div> <hr> <%-- <div class="col-sm-12" id="42" style="display: none;"> <button class="btn btn-primary" onclick="close_form()">Х</button> <form action="main" method="post" class="compose form-horizontal"> <div class="form-group"> <h3 style="color: white">New Message</h3> <label class="control-label col-sm-2" for="to_email">To:</label> <div class="col-sm-3"> <input type="email" class="form-control" id="to_email" name="receiver" required maxlength="29" minlength="3"/> </div> </div> <div class="form-group"> <label class="control-label col-sm-2" for="subject">Subject:</label> <div class="col-sm-3"> <input type="text" class="form-control" id="subject" name="subj" required/> </div> </div> <div class="form-group"> <label class="control-label col-sm-2" for="message"></label> <div class="col-sm-3"> <textarea style="resize: none;" class="form-control" maxlength="1000" id="message" name="msg"></textarea> </div> </div> <div class="form-group"> <div class="col-sm-offset-2 col-sm-10"> <input type="submit" value="Send" class="btn btn-default"/> </div> </div> </form> </div> --%> <jsp:include page="compose.jsp"/> </div> </body> </html> 
msg.inboxMessage(user)returns? - Regent