Simple java code for validating user in servlets
Let's say that I have four jsps: sign In Info.jsp, sign In.jsp, home.jsp, and I don't want users to be able to see the or until they are signed in.Servlet JDBC Database connection and Log4j integration is the topic of this tutorial. Servlet Exception; import javax.servlet.annotation. 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.
In fact, you get full user interfaces without writing a single line of code. By the time you’re done with this tutorial (less than 15 minutes from now), you’ll have a fully-working Java web application.
App Context is the servlet context listener implementation that will initialize the Database connection when application context is initialized and it also configures the log4j using it’s configuration xml file.
Notice the use of context init params for DB connection and log4j configuration.
It is fine if they view sign In and sign before signing in.
If a user that has not signed in tries to access either home or about, they should be redirected to sign