At the time of declaring a form html in a jsp. the program runs but the class says "Element 'UserHandler' not found", because I get this error? these are my files user.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<link href="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.98.2/css/materialize.min.css" rel="stylesheet"/>
<link type="text/css" rel="stylesheet" href="resources/css/miPrimerCSS.css" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.98.2/js/materialize.min.js"></script>
<title>Add New User</title>
</head>
<body>
<form method="POST" action='UserHandler' name="frmAgregarUsuario">
<input type="hidden" name="action" value="insert" />
<div class="card-panel teal lighten-2">
<span class="white-text text-darken-2">AGREGAR UN NUEVO RECORD</span>
</div>
<table>
<tr>
<td><input type="text" name="userid" placeholder=" ID DE USUARIO " /></td>
</tr>
<tr>
<td><input type="text" name="firstName" placeholder=" INGRESE EL NOMBRE " /></td>
</tr>
<tr>
<td><input type="text" name="lastName" placeholder=" INGRESE EL APELLIDO " /></td>
</tr>
<tr>
<td><button class="btn waves-effect waves-light" type="submit" name="action">Enviar</button></td>
</tr>
</table>
</form>
<!-- -->
<p><a class="waves-effect waves-light btn-large " href="UserHandler?action=listUser">Todos los Records</a>
</body>
</html>
UserHandler.java
package net.roseindia.handler;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.roseindia.dao.UserDao;
import net.roseindia.bean.UserBean;
public class UserHandler extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = 1L;
private static String INSERT = "/user.jsp";
private static String Edit = "/edit.jsp";
private static String UserRecord = "/listUser.jsp";
private UserDao dao;
public UserHandler() {
super();
dao = new UserDao();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String redirect="";
String uId = request.getParameter("userid");
String action = request.getParameter("action");
if(!((uId)== null) && action.equalsIgnoreCase("insert"))
{
int id = Integer.parseInt(uId);
UserBean user = new UserBean();
user.setId(id);
user.setfName(request.getParameter("firstName"));
user.setlName(request.getParameter("lastName"));
dao.addUser(user);
redirect = UserRecord;
request.setAttribute("users", dao.getAllUsers());
System.out.println("Record Added Successfully");
}
else if (action.equalsIgnoreCase("delete")){
String userId = request.getParameter("userId");
int uid = Integer.parseInt(userId);
dao.removeUser(uid);
redirect = UserRecord;
request.setAttribute("users", dao.getAllUsers());
System.out.println("Record Deleted Successfully");
}else if (action.equalsIgnoreCase("editform")){
redirect = Edit;
} else if (action.equalsIgnoreCase("edit")){
String userId = request.getParameter("userId");
int uid = Integer.parseInt(userId);
UserBean user = new UserBean();
user.setId(uid);
user.setfName(request.getParameter("firstName"));
user.setlName(request.getParameter("lastName"));
dao.editUser(user);
request.setAttribute("user", user);
redirect = UserRecord;
System.out.println("Record updated Successfully");
} else if (action.equalsIgnoreCase("listUser")){
redirect = UserRecord;
request.setAttribute("users", dao.getAllUsers());
} else {
redirect = INSERT;
}
RequestDispatcher rd = request.getRequestDispatcher(redirect);
rd.forward(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}
