Java Servlet Programing Laungage

Java Servlet Tutorial

Servlet Introduction

Servlet Life Cycle

Non Life Cycle Method of Servlet Interface

How to run the Servlet program

Servlet Exception Handling

Implementation of GenericServlet

Difference between HttpGet() and HttpPost()

Difference between Attributes and Parameters

First Servlet Program

State Management

Servlet Cookies

HttpSession Object

Commonly used methods of HttpSession

Servlet sendRedirect

Example of sendRedirect

How a Servlet Works

Six steps to running your first Servlet

Play Video song using servlet

Manipulating multiple value parameters

Java Servlet Projects

Servlet Project 3

Java Servlet Examples

access servlet information

count number of time servlet access

display digital clock in servlet

access servlet cookie

getting information about session

Enumeration form values

Iterator form values

generate Fibonacci series

generate random numbers

generate random values

read data from file

write data into file

upload (save) file in hard disk

upload (save) multiple file in hard disk

store data into List

Java Servlet Interview materials

Servlet subjective question

Servlet Interview question

Servlet Objective question

Java Servlet :Obtaining HTTP request Headers

The following example demonstrates how you can use the HttpServletRequest interface to obtain all the header names and sends the header name/value pairs to the browser.

index.html

<html>
	<head>
	 <title>Application of post and get method</title>
	</head>
	<body>
	 <form method="get" action="post">
	 <input type="submit" value="click">
	 </form>
	</body>
<html>

web.xml

<web-app>
	<servlet>
	 <servlet-name>s1</servlet-name>
	 <servlet-class>RegisterServlet</servlet-class>
	</servlet>
	<servlet-mapping>
	 <servlet-name>s1</servlet-name>
	 <url-pattern>post</url-pattern>
	</servlet-mapping>
</web-app>

RegisterServlet.java

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class RegisterServlet extends HttpServlet
 {
  public void doGet(HttpServletRequest req,
   HttpServletResponse res)throws ServletException,IOException
 {
  res.setContentType("text/html");
  PrintWriter out=res.getWriter(); 
  Enumeration enumeration=req.getHeaderNames();
  while(enumeration.hasMoreElements())
  {
   String header=(String)enumeration.nextElement();
   out.println(header+":"+req.getHeader(header)+"<br>");
  }
 }
}

Java Topics

Core Java Programming Language

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