Ketan Raval’s Post

JSP stands for JavaServer Pages. It's a technology used for developing web pages that support dynamic content. JSP allows Java code and certain predefined actions to be embedded into HTML or XML pages. When a JSP page is requested, the server processes the embedded Java code and generates the final HTML page, which is then sent to the client's web browser. Some key features and components of JSP include: 1. **Java Code**: JSP allows developers to embed Java code directly into HTML pages, enabling the dynamic generation of content. 2. **Scripting Elements**: JSP provides various scripting elements such as scriptlets, expressions, and declarations, which allow Java code to be executed within the page. 3. **Standard Actions**: JSP includes a set of standard actions for performing tasks such as including other files, controlling page flow, and managing session data. 4. **Custom Tag Libraries**: Developers can create custom tag libraries to encapsulate reusable components and simplify page development. 5. **Expression Language (EL)**: JSP EL provides a simplified syntax for accessing data stored in JavaBeans components, session attributes, request parameters, and other objects. 6. **JSP Directives**: JSP directives are special instructions that provide information to the container about how to process a JSP page. Overall, JSP is a powerful technology for building dynamic web applications using Java, and it's commonly used in conjunction with servlets to create robust server-side components.

Exploring Java Template Engines for Your Spring Boot Applications! 🚀 When building web applications with Spring Boot, choosing the right template engine is crucial for efficient development and maintainability. **Thymeleaf**: A modern server-side Java template engine for web and standalone environments. It excels at serving XHTML/HTML5, allowing templates to be naturally readable and designer-friendly. Its seamless integration with Spring Boot makes it a popular choice among developers. Here are some other popular server-side Java template engines: 1. **JSP (JavaServer Pages)**: A classic choice, embedding Java directly in HTML. Great for simple setups but less preferred for modern applications due to mixing logic and presentation. 2. **Freemarker**: Feature-rich and flexible, perfect for generating HTML, XML, or other text-based formats. Known for its powerful templating capabilities. 3. **Velocity**: Lightweight and straightforward, good for separating Java code from HTML. However, it’s less commonly used in new projects today. 4. **Mustache**: Logic-less templates that enforce clean separation between logic and presentation. Simple and effective. 5. **Pebble**: Modern and lightweight with a clean syntax. It’s fast, easy to use, and extensible. 6. **Handlebars.java**: Similar to Mustache but with additional features like helpers and partials, making it more versatile. 7. **JTwig**: A port of Twig from PHP, offering an elegant and readable syntax for complex templates. 8. **Rocker**: High-performance with compile-time type checking, ensuring templates are both fast and reliable. **Main Differences**: - **Syntax and Complexity**: JSP mixes logic with HTML, while Mustache and Handlebars promote clean separation. Freemarker and Velocity offer extensive features but with a steeper learning curve. Thymeleaf provides a natural templating approach, making it intuitive for both developers and designers. - **Performance**: Rocker and Pebble are known for their performance, with compile-time checks ensuring fewer runtime errors. - **Extensibility**: Freemarker and Pebble are highly extensible, allowing custom functionalities. Thymeleaf also supports custom dialects and processors for added flexibility. 🔹 Personally, I prefer using **Thymeleaf**. Its natural templating and seamless integration with Spring Boot make development a breeze, ensuring templates are both designer and developer-friendly. #Java #SpringBoot #Thymeleaf #WebDevelopment #TemplateEngines #TechTalk #Coding

Day 61 of #learnJava with #SpringBoot Journey! Exploring JSP (JavaServer Pages) in Spring Boot Today, I took a step back in time and delved into JSP (JavaServer Pages), an older but still relevant technology in the Java ecosystem. Understanding JSP is crucial for grasping the foundations of web development in Java, even as we move towards more modern frameworks. Here’s a breakdown of what I learned: 📌 1. What is JSP? JSP (JavaServer Pages) is a technology that allows you to create dynamic web content by embedding Java code directly into HTML pages. It was widely used in the early days of Java web development to build server-side applications. 📌 2. Why Learn JSP? Foundation Knowledge: JSP provides a strong foundation in understanding how server-side Java applications work, which is essential for grasping more modern technologies. Legacy Systems: Many older systems still use JSP, and learning it can help in maintaining or upgrading these systems. Complementing Modern Tech: Understanding JSP helps you appreciate the advancements in modern Java frameworks like Spring Boot. 📌 3. How Does JSP Work? JSP files are essentially HTML files with embedded Java code. When a user requests a JSP page, the server processes the Java code within the page and sends the resulting HTML back to the client. This process allows for the creation of dynamic web pages based on server-side logic. 📌 4. Core Components of JSP Directives: Instructions that control the processing of the JSP page, such as importing Java classes. Scriptlets: Blocks of Java code embedded within the HTML, used to perform logic and manipulate data. Expressions: Shortcuts to output Java variables or expressions directly into the HTML. Declarations: Used to declare variables or methods that can be reused throughout the JSP page. 📌 5. JSP vs. Modern Technologies Separation of Concerns: Modern technologies like Thymeleaf or React provide a better separation of concerns by clearly separating the presentation layer from the business logic, which is more difficult with JSP. Scalability: Modern frameworks are designed to handle complex applications more efficiently than JSP. Development Speed: With modern tools, development is faster and easier, with better support for modular code and reusable components. Community and Support: Modern frameworks have larger communities and better support, making it easier to find resources and troubleshoot issues. Understanding JSP is like learning the basics before mastering advanced techniques. While it may not be the go-to choice for new projects, it provides valuable insights into how Java web development has evolved over the years. Happy coding and exploring the roots of Java web development! 💻🌱 #SpringBoot #JSP #Java #WebDevelopment #SoftwareDevelopment #TechTips #SpringFramework #LegacySystems #CodeQuality #DevOps #SoftwareEngineering #Programming #TechCommunity #DeveloperTools #learnJava #Day61

A few months ago I posted about Pheonix, a Template Engine for Spring boot I started to develop. It managed to get some attention and I got really good feedback from here. I continued to develop it, make it better and faster. After many months of work, I have a new version which I believe is worth posting again. I want to gather as much feedback as possible and to make Phoenix even better. It is NOT ready for production use and there are many more things that need to be done (see "issues"). 🤩 What is Phoenix Phoenix is a modern template engine for Spring and Spring Boot aiming to facilitate the development of complex web applications by providing a way to create complex and modular templates benefiting from server-side rendering for better integration between the frontend and backend. 🤩 Phoenix vs Thymeleaf or Freemarker Phoenix offers several advantages compared to other existing template engines at the moment: - The ability to integrate Java code directly into HTML templates without needing to learn a new syntax or special utilities. - An easier-to-understand syntax that only requires a special character @ to integrate Java code into HTML code. - Fragments or components that can be combined and reused, making the code easier to maintain. - Speed, speed, speed - Phoenix templates are compiled, offering rendering speeds orders of magnitude faster than Thymeleaf. In my (rudimentary) benchmarks, Phoenix is even slightly faster than Rocker - You can easily return either a web page or a JSON object from any controller thanks to the Phoenix View - Reverse routing - a completely new feature for Spring. URLs are written at runtime in templates, eliminating the need for manual writing. You only mention the controller and method, and Phoenix calculates the correct URL. This way, you can change the URL in the controller without having to modify the template. - Pages dynamically modified by calling from JS to the backend to obtain a ready-to-add fragment/module to the DOM. - Almost 100% compatible with Rocker (and working on brining full compatibility) - Easy to configure* (Work in Progress to reduce necessary dependencies). 🤩 Why Phoenix and not React/Angular/Vue? Phoenix is not intended to be a replacement for JS frameworks. Instead, Phoenix aims to utilize existing JS frameworks to add SSR, thereby enhancing page rendering speed and FE-BE integration. You no longer need to always return complex JSON; you can directly provide an HTML page with everything needed and nothing more. There can be a whole debate about SSR vs non-SSR, so Phoenix tries to combine the advantages of both. 🤩 Open Source Phoenix is completely Open Source and can be used entirely for free. It is not yet stable enough to be used in production, but I will continue developing it, working on stability and performance, and will try to add other functionalities. And of course, a ⭐ is appreciated. More details: https://lnkd.in/d8NQSdjg My blog: https://petrepopescu.tech

Exploring Java Frameworks: Powering Modern Application Development 🌟 As a Java developer, I've had the opportunity to work with various frameworks that have significantly enhanced my productivity and streamlined the development process. Today, I want to share some insights into the most popular Java frameworks that are shaping the future of application development. Spring Framework: This is arguably the most widely used Java framework. With its comprehensive ecosystem, Spring simplifies the development of enterprise-level applications. Its features, such as Dependency Injection (DI) and Aspect-Oriented Programming (AOP), promote clean, modular code and make testing easier. The Spring Boot extension further accelerates development by allowing developers to create standalone applications with minimal configuration. Hibernate: For data persistence, Hibernate is a powerful Object-Relational Mapping (ORM) framework that simplifies database interactions. It allows developers to work with Java objects instead of SQL queries, making data manipulation more intuitive. Hibernate also provides robust caching mechanisms and supports various databases, enhancing performance and scalability. JavaServer Faces (JSF): As a component-based web framework, JSF simplifies the development of user interfaces for web applications. It promotes reusable UI components and integrates seamlessly with other Java EE technologies, making it a solid choice for building dynamic web applications. Apache Struts: This framework is designed for creating enterprise-ready Java web applications. Struts follows the Model-View-Controller (MVC) design pattern, which helps separate concerns and improve maintainability. Although newer frameworks have emerged, Struts remains a reliable option for many organizations. Grails: Built on top of the Spring framework, Grails is a web application framework that emphasizes convention over configuration. It is particularly well-suited for rapid application development, allowing developers to build applications quickly while leveraging the power of Groovy and Spring. Micronaut: A newer addition to the Java ecosystem, Micronaut is designed for building microservices and serverless applications. Its low memory footprint and fast startup time make it an excellent choice for cloud-native development, and it supports reactive programming out of the box. Each of these frameworks brings unique strengths to the table, enabling developers to choose the right tools for their specific project needs. By leveraging these frameworks, we can build robust, scalable, and maintainable applications that meet the demands of today’s fast-paced tech environment.

The Challenges of Using Servlets in Java: A Developer's Perspective As a developer working with Java, particularly in web applications, Servlets remain a foundational technology. Introduced as part of the Java EE (Enterprise Edition) specification, Servlets provide a robust mechanism for handling HTTP requests and generating dynamic responses. However, despite their importance, developers often encounter several challenges when working with Servlets. In this blog, I’ll discuss some of the most common issues developers face and share solutions to address them. Steps to Create a Basic Servlet Boilerplate: If you're new to Servlets, getting started with a basic servlet project can seem daunting. However, it’s fairly straightforward once you know the steps. Here’s how you can create a simple servlet-based web application: 1. Set up your IDE and Java environment Install the Java Development Kit (JDK) and configure an Integrated Development Environment (IDE) like IntelliJ IDEA or Eclipse. These tools help streamline development with features like code completion, debugging, and testing. 2. Add the Servlet API dependency If you’re using a build automation tool like Maven or Gradle, add the necessary Servlet API dependency to your project’s configuration. Alternatively, you can manually download and add the Servlet API JAR to your project. 3. Create the web.xml (or use annotations) The web.xml file in the WEB-INF folder is essential for mapping Servlets to specific URL patterns. You can also use Servlet 3.0+ annotations to configure your Servlets without needing the web.xml file. This helps reduce configuration overhead. Write your Servlet class 4. Create a Java class that extends HttpServlet and override either the doGet() or doPost() methods to handle HTTP requests. Your Servlet class will process incoming requests and generate dynamic responses. 5. Configure and deploy to a Servlet container You need a Servlet container like Apache Tomcat or Jetty to run your web application. Set up the container and deploy your project to it. This can be done directly through your IDE or by packaging the application into a WAR (Web Application Archive) file. 6. Test your Servlet in the browser After deployment, test your Servlet by navigating to the appropriate URL in your browser (e.g., http://localhost:8080/your-app/hello). If everything is set up correctly, you should see the output generated by your Servlet. By following these steps, you’ll have a basic servlet boilerplate in place, which you can then expand upon. From handling POST requests and working with databases to implementing advanced features like session management, Servlets can serve as a solid foundation for your Java web applications. #JavaDevelopment #Servlets #JavaEE #ServletProgramming #WebApplications #JavaWebApps #JavaTips #SpringFramework #ServletAPI #JavaForBeginners #BackendDevelopment #TechTutorial #JavaDevelopers #JavaTech #SoftwareEngineering

Day 28 of Learning Full-stack JAVA Development... Advanced JAVA Topics - #Servlet and #JSP During Day 25 to 31, I'll delve into Servlets and JSP for Java full-stack development. On the 28th day, I covered the introduction to JSP, its advantages, and why JSP is preferred over servlets. I also detailed the lifecycle of JSP, outlining its steps. #JSP - a. Introduction to JSP  JSP technology is used to create dynamic web applications. JSP pages are easier to maintain then a Servlet. JSP pages are opposite of Servlets as a servlet adds HTML code inside Java code, while JSP adds Java code inside HTML using JSP tags. Everything a Servlet can do, a JSP page can also do it. JSP pages are converted into Servlet by the Web Container. The Container translates a JSP page into servlet class source(.java) file and then compiles into a Java Servlet class. Advantage of JSP 1. Easy to maintain and code. 2. High Performance and Scalability. 3. JSP is built on Java technology, so it is platform independent. *Why the JSP is preferred over servlets - 1. JSP provides an easier way to code dynamic web pages. 2. JSP does not require additional files like, java class files, web.xml etc 3. Any change in the JSP code is handled by Web Container(Application server like tomcat), and doesn't  require re-compilation. 4. JSP pages can be directly accessed, and web.xml mapping is not required like in servlets. *These are some reasons that's why the JSP is preferred over the servlet b. lifecycle of JSP A JSP page is converted into Servlet in order to service requests. The translation of a JSP page to a Servlet is called Lifecycle of JSP. JSP Lifecycle is exactly same as the Servlet Lifecycle, with one additional first step, which is, translation of JSP code to Servlet code. Following are the JSP Lifecycle steps: 1. Translation of JSP to Servlet code. 2. Compilation of Servlet to bytecode. 3. Loading Servlet class. 4. Creating servlet instance. 5. Initialization by calling jspInit() method 6. Request Processing by calling jspService() method 7. for Destroying Calling jspDestroy() method I have shared an image that will help you understand the lifecycle of JSP. #JSP #Servlet #Tomcat #Eclipse #Lifecycle #JavaDevelopment #WebDevelopment #CodeIndexing #SoftwareEngineering #JavaProgramming 🖥

#Day111 Review 🔁 #118DaysOfCode Today i did - Java 2d Array Deploying website locally i revise html again and i learn key concept like - Absolutely, here's a more detailed introduction to HTML including definitions and explanations for key tags: HTML Basics 1. Introduction to HTML - HTML (HyperText Markup Language): The standard language for creating web pages and web applications. - HyperText: Refers to links that connect web pages to one another, either within a single website or between websites. - Markup Language: Uses tags to define elements within a document. 2. Basic Structure of an HTML Document An HTML document typically starts with a document type declaration and is structured using various tags. Here's a basic template: ```html <!DOCTYPE html> <html> <head> <title>Page Title</title> </head> <body> <!-- Content goes here --> </body> </html> Key Components: - <!DOCTYPE html>: - Definition: A declaration that defines the document type and version of HTML. - Purpose: Informs the browser about the HTML version to expect, ensuring proper rendering of the content. - <html>: - Definition: The root element of an HTML document. - Purpose: Encloses all the content of the web page, indicating the beginning and end of an HTML document. - <head>: - Definition: Contains meta-information about the HTML document. - Purpose: Includes metadata, links to stylesheets, character set declarations, and the document's title. - Common Elements: - <title>: Specifies the title of the document, which appears in the browser tab. - <meta>: Provides metadata such as character set, author, and description. - <link>: Links external resources like stylesheets. - <body>: - Definition: Contains the content of the HTML document. - Purpose: Encloses all the visible content, such as text, images, links, and other media. - Common Elements: - <h1> to <h6>: Header tags used to define headings. - <p>: Paragraph tag for blocks of text. - <a>: Anchor tag for hyperlinks. - <img>: Image tag for embedding images. - <div> and <span>: Division and span tags for grouping and styling content. - Document Type: Ensures the browser knows to render the document as HTML5. - HTML Tag: Defines the entire HTML document. - Head Section: Contains metadata and the title. - Body Section: Contains the visible content of the page. Happy and joyful coding! #118daysOfCodeChallenge || HARE KRISHNA ||

How to Convert HTML to DOCX in Java #java #api #html #docx #conversion https://lnkd.in/ewb-_MVU

Where is Java used in Web Development?