See my comments below;
Any sufficiently advanced technology is indistinguishable from magic - Author
C Clark
________________________________
From: Rafał Laczek <rafal_lac...@wp.pl>
To: dillanferna...@yahoo.com
Cc: Java EE (J2EE) Programming with Passion!
<java-ee-j2ee-programming-with-passion@googlegroups.com>
Sent: Tue, January 5, 2010 9:00:22 AM
Subject: Re: [java ee programming] JSP/Servlet
Hi,
Thanks for response.
My comments are in // tags
Can you help
BR
Rafal
resultEdit.jsp
- <form name="edit" action="ResultEdit.java" method="get">
You need to give the servlet name and not the java file name (what you have
given in your web.xml)
// I have changed for <form name="edit" action="ResultEdit" method="get">
ResultEdit.java
- String action = request.getParameter("do");
You have passed "do" to the jsp file, but you haven't sent it to the Servlet.
User a "hidden" field to send to the servlet.
// I don't understand exactly what I should to do. Could you help me please.
//I send bellow web.xml
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>Result</servlet-name>
<servlet-class>servlets.Result</servlet-class>
</servlet>
<!-- Add the following->
<servlet>
<servlet-name>ResultEdit</servlet-name>
<servlet-class>servlets.ResultEdit</servlet-class>
</servlet>
<!-- End -->
<servlet-mapping>
<servlet-name>Result</servlet-name>
<url-pattern>/Result</url-pattern>
</servlet-mapping>
<!-- Add The Following -->
<servlet-mapping>
<servlet-name>ResultEdit</servlet-name>
<url-pattern>/ResultEdit</url-pattern>
</servlet-mapping>
<!-- End -->
</web-app>
In your resultEdit.jsp file after the following line
<input type="hidden" name="id" value="<%=person.getId()%>">
type;
<input type="hidden" name="do" value='<%=request.getParameter("do")%>'>
Dnia 4-01-2010 o godz. 21:43 Dillan Fernando napisał(a):
>You have not posted web.xml. But from what I can see, the following are
>possible causes;
>
>resultEdit.jsp
>- <form name="edit" action="ResultEdit.java" method="get">
>You need to give the servlet name and not the java file name (what you have
>given in your web.xml)
>
>
>ResultEdit.java
>- String action = request.getParameter("do");
>You have passed "do" to the jsp file, but you haven't sent it to the Servlet.
>User a "hidden" field to send to the servlet.
>
>
>hope this helps
>
>
>
> Any sufficiently advanced technology is indistinguishable from magic - Author
> C Clark
>
>
>
>
________________________________
From: Rafał Laczek <rafal_lac...@wp.pl>
>To: Java EE (J2EE) Programming with Passion!
><java-ee-j2ee-programming-with-passion@googlegroups.com>
>Sent: Mon, January 4, 2010 2:35:21 PM
>Subject: [java ee programming] JSP/Servlet
>
>Hi
>Colleagues,
>I need your some help.
>In reference to my last e-mail I ask you to help me with test application.
>The idea is that after proper log in procedure the user will see the
>list with some sample states.
>Then there will be possibility to add, edit and delete the records.
>At this moment there is possibility to add new records. Also when the
>user clicks for edit button the list /table appears where there is
>possibility to edit chosen record.
>Unfortunately after clicking for save
>button the edited record is without changes as well as in browser
>following communicate appears:
>TestApplication/ResultEdit.java
>description The requested resource (/TestApplication/ResultEdit.java) is
>not available.
>Bellow I give you code of each file BUT PLEASE MAINLY CHECK
>resulEdit.jsp and resultEdit.java(2 last files) because here is any
>problem.
>
>Thank you for your help!
>
>Best
>regards,
>Rafal Laczek
>
>result.jsp - responsible for displaying list with registered records-
>it works good.
><body>
><h3 style='font-size:40px' align='center';>Test Application</h3>
><div class="results">
><table border="1"; style="height: 40px;width: 500px; background:white;" >
><tr><th colspan="7"><strong>Results:</strong></th></tr>
> <tr>
>
><td><strong>ID</strong></td>
> <td><strong>First name</strong></td>
> <td><strong>Surname</strong></td>
> <td><strong>Sex</strong></td>
> <td><strong>Country</strong></td>
> <td> </td>
> <td> </td>
> </tr>
>
> <%/*ListIterator it =
>arraylist.listIterator();
> while (it.hasNext()){
> Person person =(Person)it.next();*/%>
>
> <% ArrayList persons = (ArrayList)session.getAttribute("persons");
> if (persons != null)
>
> for (Iterator it = persons.iterator(); it.hasNext();){
> Person person =(Person)it.next();%>
>
><tr>
> <td>
>
><%=session.getId()%>
> </td>
> <td>
> <% out.println(person.getFirstName());%>
> </td>
> <td>
> <%out.println(person.getSurname());%>
> </td>
> <td>
> <%out.println(person.getSex());%>
> </td>
> <td>
>
><%out.println(person.countryType());%>
> </td>
>
> <%
> out.println("<td><a href=\"ResultEdit.jsp?do=edit&id=" + person.getId()
>+"\">Edit</td>");
> out.println("<td><button><a href=>Delete</a></button></td>");
> out.println("</tr>");
> %>
> </tr>
> <%}
> else
> out.println("List is empty");%>
></table>
>
>
>Result.java - the servlet responsible for business logic. It works good.
>package servlets;
>
>import java.io.*;
>import java.util.*;
>import javax.servlet.*;
>import javax.servlet.http.*;
>
>import Testapplication.Person;
>
>public class Result extends HttpServlet{
> public void doGet(HttpServletRequest request, HttpServletResponse
>
>response)throws IOException, ServletException{
> this.doPost(request,response);
> }
> public void doPost(HttpServletRequest request, HttpServletResponse
>response)throws IOException, ServletException{
>
> HttpSession session = request.getSession();
> ArrayList<Person>persons =
>(ArrayList)session.getAttribute("persons");
>
> if(persons == null){
> persons = new ArrayList<Person>();
>
> session.setAttribute("persons", persons);
> }
>
> String firstName = request.getParameter("firstName");
> String
>surname = request.getParameter("surname");
> String sex = request.getParameter("sex");
> String countryType = request.getParameter("countryType");
> if(firstName !=null && surname !=null){
> int idCounter = persons.size();
> Person person = new Person(idCounter);
>
> person.setFirstName(firstName);
> person.setSurname(surname);
> person.setSex(sex);
> person.setCountryType(countryType);
> //The object person1 is added to arraylist
> persons.add(person);
>
> RequestDispatcher dispatcher =
>request.getRequestDispatcher("/result.jsp");
> dispatcher.forward(request,response);
> }
>
> }
>}
>
>resultEdit.jsp it is possible to edit data but edited record is not
>saved in arraylist.
><%
>ArrayList<Person>persons =
>(ArrayList)session.getAttribute("persons");
>
>String indexS = request.getParameter("id");
>int index =Integer.parseInt(indexS);
>Person person = persons.get(index);
>
>%>
>
><form name="edit" action="ResultEdit.java" method="get">
><table border="1">
><tbody>
><tr>
><td>First name:</td>
><td><input type="text" name="firstName"
>value="<%=person.getFirstName()%>"></td>
></tr>
><tr>
><td>Surname:</td>
><td><input type="text" name="surname"
>value="<%=person.getSurname()%>"></td>
></tr>
><tr>
><td>Sex:</td>
><td><input type="text" name="sex" value="<%=person.getSex()%>"></td>
></tr>
><tr>
><td>Preferable country to live:</td>
><td><input type="text" name="countryType"
>value="<%=person.countryType()%>"></td>
></tr>
></tr>
><tr>
><td colspan="2"><input type="submit"
>name="btnSave" value="Save"></td>
></tr>
></tbody>
></table>
><input type="hidden" name="id" value="<%=person.getId()%>">
></form>
></body>
></html>
>
>resultEdit.java serwlet. There is something wrong.
>import
>java.io.IOException;
>import java.util.ArrayList;
>
>import javax.servlet.RequestDispatcher;
>import javax.servlet.ServletException;
>import javax.servlet.http.HttpServlet;
>import javax.servlet.http.HttpServletRequest;
>import javax.servlet.http.HttpServletResponse;
>import javax.servlet.http.HttpSession;
>
>import Testapplication.Person;
>
>public class ResultEdit extends HttpServlet {
> public void
>doGet(HttpServletRequest request, HttpServletResponse
>response)
> throws ServletException, IOException {
>
> HttpSession session = request.getSession();
> ArrayList<Person>persons = (ArrayList)session.getAttribute("persons");
>
> String action = request.getParameter("do");
>
> if(action.equals("edit")){
> session.setAttribute("persons",
>persons);
> request.setAttribute("persons", persons);
> RequestDispatcher dispatcher =
>getServletContext().getRequestDispatcher("/result.jsp");
> dispatcher.forward(request, response);
> }else if(action.equals("delete")){
>
> response.sendRedirect(request.getContextPath() + "/result.jsp");
> }
> }
>}
>
>----------------------------------------------------
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