Make Your Servlet Code Reusable

Oftentimes, you have a bit of logic or a block of code that’s repeated in all your servlets. Or you may need to check or validate the doGet() or doPost() methods before you execute either.

An efficient way to do this is to implement your logic in the service() method:

  1. Write a common servlet:
    public class CommonServlet extends HttpServlet{    // Common service that will be triggered for every request.      protected void service(HttpServletRequest request, HttpServletResponse response) throwsServletException, IOException {    //    // implement any common logic here. Eg. Check whether session has some values or not. Or checkwhether user type etc. You can even add authorization logic here.}    }
  2. Extend all your servlets from the common servlet:
    public class MyBusinessServlet extends CommonServlet{ public void doPost(HttpServletRequest request, HttpServletResponse response) throwsServletException, IOException {// Your code..       } public void doGet(HttpServletRequest request, HttpServletResponse response) throwsServletException, IOException {// Your code..       }} 

Both doGet() or doPost() will now automatically call CommonServlet’s service() method before the doXXX method is executed?as per Servlet specification.

Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

homes in the real estate industry

Exploring the Latest Tech Trends Impacting the Real Estate Industry

The real estate industry is changing thanks to the newest technological advancements. These new developments — from blockchain and AI to virtual reality and 3D printing — are poised to change how we buy and sell homes. Real estate brokers, buyers, sellers, wholesale real estate professionals, fix and flippers, and beyond may

man on floor with data

DevX Quick Guide to Data Ingestion

One of the biggest trends of the 21st century is the massive surge in internet usage. With major innovations such as smart technology, social media, and online shopping sites, the internet has become an essential part of everyday life for a large portion of the population. Due to this internet

payment via phone

7 Ways Technology Has Changed Traditional Payments

In today’s digital world, technology has changed how we make payments. From contactless cards to mobile wallets, it’s now easier to pay for goods and services without carrying cash or using a checkbook. This article will look at seven of the most significant ways technology has transformed traditional payment methods.