Question: servlets



Share on Google+Share on Google+

2 Answer(s)      9 years ago
Posted in : Servlet Interview Questions
View Answers

June 3, 2008 at 7:07 PM


<title>registration form in jsp</title>

<table border="1" width="50%" bgcolor="pink">
<td width="100%">
<form method="POST" action="/examples/jsp/AccessValueServlet" >

<h2 align="center">Employee registration form</h2>
<table border="1" width="100%">
<td width="50%"><b>User Name:</b></td>
<td width="50%"><input type="text" name="username" size="20"/> </td>
<td width="50%"><b>Last Name:</b></td>
<td width="50%"><input type="text" name="lastname" size="20"/> </td>
<td width="50%"><b>Email:</b></td>
<td width="50%"><input type="text" name="email" size="20"/> </td>
<td width="50%"><b>Position:</b></td>
<td width="50%"><input type="text" name="position" size="20"></td>
<td width="50%"><b>Salary:</b></td>
<td width="50%"><input type="text" name="salary" size="20"></td>
<p><input type="submit" value="Submit" name="submit">
<input type="reset" value="Reset" name="reset"></p>



package javacode;

import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class AccessValueServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
String title = "Reading All Request Parameters";
out.println(ServletValue.headWithTitle(title) +
"<BODY BGCOLOR=\"pink\">\n" +
"<H1 ALIGN=CENTER>" + title + "</H1>\n" +
"<TR BGCOLOR=\"#FFAD00\">\n" +
"<TH>Employee Name<TH>Employee Status(s)");

Enumeration paramNames = request.getParameterNames();
while(paramNames.hasMoreElements()) {
String paramName = (String)paramNames.nextElement();
out.println("<TR><TD>" + paramName + "\n<TD>");
String[] paramValues = request.getParameterValues(paramName);
if (paramValues.length == 1) {
String paramValue = paramValues[0];
if (paramValue.length() == 0)
out.print("<I>No Value</I>");
} else {
for(int i=0; i<paramValues.length; i++) {
out.println("<LI>" + paramValues[i]);

public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);

June 3, 2008 at 7:15 PM

In this example not using of pseudo code only using of java

package javacode;

import javax.servlet.*;
import javax.servlet.http.*;

public class ServletValue {
public static final String DOCTYPE =
"<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">";

public static String headWithTitle(String title) {
return(DOCTYPE + "\n" +
"<HTML>\n" +
"<HEAD><TITLE>" + title + "</TITLE></HEAD>\n");

public static int getIntParameter(HttpServletRequest request,
String paramName,
int defaultValue) {
String paramString = request.getParameter(paramName);
int paramValue;
try {
paramValue = Integer.parseInt(paramString);
} catch(NumberFormatException nfe) { // Handles null and bad format
paramValue = defaultValue;

public static String getCookieValue(Cookie[] cookies,
String cookieName,
String defaultValue) {
for(int i=0; i<cookies.length; i++) {
Cookie cookie = cookies[i];
if (cookieName.equals(cookie.getName()))


Read for more Details



Related Tutorials/Questions & Answers:
servlets  what is the duties of response object in servlets
servlets  why we are using servlets
what are advantages of servlets  what are advantages of servlets   Please visit the following link: Advantages Of Servlets
Servlets  How to edit and delete a row from the existing table in servlets
servlets  How do you communicate between the servlets?   We can communicate between servlets by using RequestDespatcher interface and servlet chaining
what is the architecture of a servlets package  what is the architecture of a servlets package   The javax.servlet package provides interfaces and classes for writing servlets. The Servlet Interface The central
Servlets  How to check,whether the user is logged in or not in servlets to disply the home page
servlets  why we require wrappers in servlets? what are its uses? Please explain   These wrappers classes help you to modify request...://
. Anyways, please visit the following links:
servlets  How to open and read the contents of a text file in servlets?   Please visit the following link: Read text file using Servlet
servlets   Hi what is pre initialized servlets, how can we achives?   When servlet container is loaded, all the servlets defined in the web.xml file does not initialized by default. But the container receives
Servlets and
Servlets and   Sir...! I want to insert or delete records form oracle based on the value of confirm box can you please give me the idea.... thanks
servlets why do we need web-inf directory in web application  why do we need web-inf directory in web application? means what's the benefits of doing so
which are the differ ways you can communicat between servlets  which are the differ ways you can communicat between servlets   Different ways of communicating between servlets:- 1)Using RequestDispatcher object. 2
package supports the development of servlets that use the HTTP protocol. The classes... javax.servlet.GenericServlet and serves as the base class for HTTP servlets. HttpServlet-Request
what are sessions in servlets  what are sessions in servlets   A Session refers to all the request that a single client makes to a server...:
the servlets
what is diff between generic servlets and httpservlets  what is diff between generic servlets and httpservlets   Difference between GenericServlet and HTTPServlet: 1)GenericServlet belongs to javax.servlet package
regarding the user usage and habits. Servlets sends cookies to the browser client...://
servlets  hi i am using servlets i have a problem in doing an application. in my application i have html form, in which i have to insert on date value, this date value is retrieved as a request parameter in my servlet
what are filters in java servlets  what are filters in java   Filters are powerful tools in servlet environment. Filters add certain functionality to the servlets apart from processing request and response paradigm
servlets  what are different authentication options available in servlets   There are four ways of authentication:- HTTP basic authentication HTTP digest authentication HTTPS client authentication Form-based
jsp -servlets
jsp -servlets  i have servlets s1 in this servlets i have created emplooyee object, other servlets is s2, then how can we find employee information in s2 servlets
Servlets with Extjs
Servlets with Extjs  how to integrate servlets and extjs and also show database records in extjs grid using servlet how to get servlets json response. Can any one please help me
Authentication in Servlets
Authentication in Servlets  What are different Authentication options available in Servlets
java servlets
java servlets  please help... how to connect java servlets with mysql i am using apache tomcat 5.5
advantages of Servlets
advantages of Servlets  What is advantages of Servlets ?    Portability. Powerful. Efficiency. Safety. Integration. Extensibilty. Inexpensive
servlets and struts
servlets and struts  wat is the diffrence between servlets and struts?   A Servlet is a technology and Struts is a framework which relies on or makes use of Servlets.A Servlet is a controller. Struts has its own Servlet
Servlets Programming
Servlets Programming  Hi this is tanu, This is a code for knowing... visit the following links: http
Sessions in servlets
Sessions in servlets  What is the use of sessions in servlets?   The servlet HttpSession interface is used to simulate the concept that a person's visit to a Web site is one continuous series of interactions
servlets - Servlet Interview Questions
what is servlets in Java  what is servlets in Java


Advertisement null