JSP and SERVLETS Tutorial : First Java Web Application In 25 STEPS

The speaker introduces themselves and the course content, outlining the steps to create a simple web application with login and management functionalities using Java, Maven, and Tomcat.

The process of creating a Maven project in Eclipse to build a web application, including setting up the project, configuration options, and dependencies.

Explanation of configuring the project structure, including where to place Java resources, properties files, and XML files, as well as unit testing folders.

Discussion on managing dependencies using Maven, updating the project to resolve errors, and configuring the pom.xml file for the web application.

Creating the Login Servlet by copying files, configuring web.xml, and writing Java code for servlet functionality.

Executing the web application in Eclipse using Maven build, launching Tomcat server, and accessing the application through a browser to view the servlet response.

Exploration of Java Servlet technology, Java Platform Enterprise Edition (Java EE), Oracle's Java EE documentation, and servlet specifications.

Creating a JavaServer Pages (JSP) file, the difference between Java and JSP, deploying JSP files, and redirecting from servlet to JSP.

Passing parameters in servlets through the request, accessing parameters in servlets, setting attributes for JSP, and accessing attributes in JSP using expression language.

Writing Java code within a JSP file, importing classes, using expression language and standard tag libraries, avoiding scriptlets, and managing business logic in a web application.

The speaker discusses how to pass parameters using a GET request, demonstrates passing parameters through the URL, and explains the security risks associated with passing passwords in the URL.

The speaker transitions from using a GET request to a POST request by creating an HTML form and modifying the request method to post, sending user input securely without exposing passwords in the URL.

The process of handling a POST request in the servlet is explained, including creating a doPost method, sending form data via post, and redirecting to a new JSP page upon successful submission.

Implementing a simple user validation service to check user credentials, redirecting valid users to a welcome page, and handling invalid user scenarios by displaying error messages.