Sevlet program for updating table
We will use this class for database connection and then set the connection object to servlet context attribute that other servlets can use.
*/ import *; import *; import javax.servlet.*; import javax.*; import *; public class Update Servlet extends Http Servlet GTU WTAD Practical 29 : Develop a Java application to perform the database driven operation like insert, Delete, Update and selection using Prepared Statement.
Notice the use of context init params for DB connection and log4j configuration.
When context will be destroyed, we are closing database connection in context Destroyed() method.
We have provided a lot of tutorials on servlets in java, this tutorial is aimed to use all of those information to create a full-fledged web application with database connectivity and log4j integration for logging. DBConnection Manager; @Web Listener public class App Context Listener implements Servlet Context Listener App Error is our application exception handler servlet configured in deployment descriptor, it provides useful information to the user incase of 404 errors or application level exceptions and provide them hyperlink to go to login page of application.
I strongly recommend to check out following tutorials if you are not familiar with any of these. package com.journaldev.servlet.errorhandler; import
Ajax interactions can be used to do things such as validate form entries (while the user is entering them) using server-side logic, retrieve detailed data from the server, dynamically update data on a page, and submit partial forms from the page.