Author Archives: Stanislav_Panteleev

Database.What is a “database management system”?

A Database Management System (DBMS) is software that allows users and applications to interact with a database. It acts as an interface between the database and end-users or programs, handling how data is stored, retrieved, and managed. 🔧 What a … Continue reading →

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Database.What is a “database”?

A database is an organized collection of data that can be easily accessed, managed, and updated. It’s designed to store, retrieve, and manipulate information efficiently. Here are key points: Structured: Data is usually organized into tables (rows and columns) in … Continue reading →

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Java.Thymeleaf.LoopingAndConditionalExamples

📜 1. Passing a List to Thymeleaf and Looping Through It Suppose we want to display a list of users. 🔵 Controller (Java): File: HelloController.java ✅ We pass a List<String> called users into the model. 🔵 Thymeleaf Template: File: users.html … Continue reading →

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Java.Thymeleaf.SmallExampleSpringBoot

We’ll create a Spring Boot app that: Maps a URL /hello Passes a dynamic user name Displays it using Thymeleaf template 🔵 1. Project Setup ✅ Maven dependencies in pom.xml: ✅ These two starters are enough! 🔵 2. Create the … Continue reading →

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Java.Thymeleaf.What is thymeleaf ?

📜 What is Thymeleaf? ✅ Thymeleaf is a modern server-side Java template enginethat is used to generate HTML, XML, JavaScript, CSS, or even plain text dynamically. ✅ It is mainly designed for web applications, but can also be used for … Continue reading →

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Java.Session.Is a session object always created in a JSP page ?

📜 Is a Session object always created in a JSP page? ✅ By default:Yes, a session object is automatically created for every user in a JSP page — unless you explicitly tell the JSP engine not to create one. 🔥 … Continue reading →

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Java.Servlet.Can I use Javascript in a JSP page?

✅ Yes, absolutely — you can use JavaScript inside a JSP page, just like you would in any normal HTML page! Because JSP ultimately generates an HTML page that is sent to the browser,and JavaScript is a client-side technology, the … Continue reading →

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Java.Servlet.How is JSP configured in the deployment descriptor.

🔵 1. Configuring the JSP Servlet (Optional) The server (like Tomcat) has an internal servlet for handling JSPs, called the JSP servlet.You can explicitly declare and configure it in web.xml if needed. ✅ Example: ✅ What’s happening: You map all … Continue reading →

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Java.Servlet.How does error handling work with JSTL?

✅ JSTL (especially Core and SQL libraries) has built-in error handling mechanismsthat allow you to catch and manage exceptions gracefully inside the JSP, without crashing the page. You don’t always need to forward to a special error page — sometimes … Continue reading →

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Java.Servlet.How can I handle errors in JSP pages?

In JSP, you can handle errors in two main ways: Approach Description 1. Using errorPage and isErrorPage page directives Forward to a special JSP page when an error occurs 2. Using centralized web.xml error handling Map errors globally to error … Continue reading →

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