Anik Hasan’s Post

What Is JSP In Java? Know All About Java Web Applications https://lnkd.in/dZWrYxJ7 ---------------------------------------------------------- What Is JSP In Java? JavaServer Pages (JSP) is a technology used in Java web development to dynamically generate HTML content or other types of markup languages. It allows Java code to be embedded directly into web pages, enabling the seamless integration of dynamic content with static HTML templates. JSP files are similar to regular HTML files but contain Java code snippets enclosed within special tags, denoted by "<% %>".  -------------------------- 💡 JavaServer Pages (JSP): JavaServer Pages (JSP) is a technology in Java web development for dynamic content generation. JSP integrates Java code into web pages, facilitating the combination of dynamic and static content. JSP files resemble HTML but include Java code within special tags ("<% %>"). 🌐 Benefits of Learning JSP: Learning JSP opens avenues for creating interactive and data-driven web pages. It enables the utilization of Java's robustness and object-oriented features in web development. JSP seamlessly integrates with other Java web technologies like Servlets and JavaBeans. Acquiring JSP skills is valuable for Java developers aiming to excel in dynamic web content creation.

#springframework #springmvc Spring MVC workflow: Spring MVC (Model-View-Controller) is a framework that provides a structured way to develop web applications in Java. Its workflow can be summarized in the following steps: 1. Request Handling: The web server receives an HTTP request and forwards it to the DispatcherServlet, which is the central component of Spring MVC. 2. Request Mapping: The DispatcherServlet consults the HandlerMapping to identify the appropriate controller that can handle the request based on the URL and HTTP method. 3. Controller Execution: The selected controller processes the request, often interacting with the model (business logic or data) to gather necessary information. 4. Model Preparation: The controller populates the model with the data it retrieves and prepares it for rendering in the view. 5. View Resolution: The controller returns a view name. The DispatcherServlet consults the ViewResolver to find the actual view implementation (e.g., JSP, Thymeleaf). 6. Rendering the View: The resolved view is rendered with the model data. The view generates the final HTML content. 7. Response Delivery: The generated content is sent back to the client as an HTTP response. This workflow promotes separation of concerns, allowing developers to manage application logic, user interface, and data handling more effectively.

🌟 Servlets vs. JSP: Mastering the Essentials for Java Developers 🌟 As a Java developer, understanding the fundamental differences between Servlets and JSP (JavaServer Pages) is crucial for building dynamic and efficient web applications. Whether you're just starting or looking to deepen your knowledge, here's a quick guide to help you navigate these essential technologies! 🚀 Servlets: The Backbone of Java Web Applications Definition: Servlets are Java classes that handle requests and responses in a web application. They are the backbone of server-side programming in Java. Usage: Ideal for processing requests, performing business logic, and controlling the application flow. Lifecycle: Managed by the servlet container, involving initialization, request handling, and termination. Advantages: High performance due to direct Java code execution. Fine-grained control over the request/response lifecycle. Robust integration with other Java EE components. 🌐 JSP: Simplifying Web Content Creation Definition: JSP is a technology used to create dynamically generated web pages based on HTML, XML, or other document types. Usage: Best for creating the view layer of your web application, embedding Java code directly into HTML. Lifecycle: Compiled into a servlet by the server, then executed as a servlet. Advantages: Ease of use with HTML-like syntax. Separation of concerns: business logic in Servlets, presentation in JSP. Built-in objects and custom tag libraries for enhanced functionality. 🔄 Key Differences Purpose: Servlets focus on logic, JSP focuses on presentation. Syntax: Servlets are pure Java, while JSP combines HTML and Java. Use Case: Servlets for complex processing, JSP for creating the user interface. 🌟 Why Both Matter? Combining Servlets and JSP allows you to build robust, scalable, and maintainable web applications. Mastering both technologies equips you with the tools to handle various aspects of web development, from backend logic to frontend presentation. 📈 Path to Becoming a Java Developer Learn the Basics: Start with core Java, then move on to Servlets and JSP. Hands-on Practice: Build small projects to understand their interaction. Explore Frameworks: Dive into advanced frameworks like Spring and Hibernate. By mastering Servlets and JSP, you're laying a solid foundation for your Java development journey. Keep coding, keep learning, and stay curious! #Java #Servlets #JSP #WebDevelopment #CareerGrowth #JavaDeveloper #TechTips #Programming #SoftwareDevelopment

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

This is a great idea. Have thought of it myself a couple times but never gotten to trying it out. "When writing a web application in Go or Java, HTML is commonly generated through templates, which contain small fragments of logic. It is certainly possible to test them indirectly through end-to-end tests, but those tests are slow and expensive. We can instead write unit tests that use CSS selectors to probe the presence and correct content of specific HTML elements within a document. Parameterizing these tests makes it easy to add new tests and to clearly indicate what details each test is verifying. This approach works with any language that has access to an HTML parsing library that supports CSS selectors; examples are provided in Go and Java." And i would write these in my SSR language and also run them on the server. Here's the post:

🌿Understanding Spring MVC Architecture work flow 🌿 Spring MVC (Model-View-Controller) is a powerful and flexible framework that simplifies the development of web applications in Java. Here's a high-level overview of its workflow: 1️⃣Client Request: The process starts with the user sending a request through a browser. 2️⃣Front Controller (DispatcherServlet): This core component receives the request and acts as a gateway to the Spring MVC application. 3️⃣Handler Mapping: DispatcherServlet consults the HandlerMapping to identify the appropriate controller. 4️⃣Controller: The designated controller processes the request, interacts with the service layer, and prepares data for the view. 5️⃣Model and View: The controller returns the ModelAndView object, which includes both the data (Model) and the view name (View). 6️⃣View Resolver: The ViewResolver identifies the correct view template (e.g., JSP, Thymeleaf). 7️⃣Rendering the View: The view is rendered and presented to the user. Spring MVC makes web development streamlined and efficient by separating concerns, enabling maintainability, and simplifying development with dependency injection and other features. Whether you’re building RESTful services or traditional web applications, understanding the architecture helps in writing scalable and robust solutions. What’s your experience working with Spring MVC? Let’s connect and share knowledge! #SpringMVC #Java #WebDevelopment #SoftwareArchitecture #TechInsights #SpringFramework

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

Difference between @Controller and @RestController in Java in easy way and easy words @Controller: This is used for handling web pages (HTML). It means that the method will return a view (like an HTML page). You typically use this when you want to build a web application where you return user interfaces. @RestController: This is used for RESTful web services, where the method directly returns data (like JSON or XML) instead of a view. You use this when building APIs that other programs or apps consume. Simple Example: @Controller: java Copy code @Controller public class MyController { @GetMapping("/welcome") public String welcome() { return "welcome"; // returns a view (HTML page named welcome.html) } } @RestController: java Copy code @RestController public class MyRestController { @GetMapping("/api/welcome") public String welcomeApi() { return "Welcome to the API"; // returns plain data (like JSON or a string) } } In summary, use @Controller for web pages and @RestController for APIs that return data.

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 🖥

Front-End vs. Back-End in Java Development 🌐💻 In Java development, knowing the difference between front-end and back-end is essential for building effective applications. Front-End Development 🎨 Front-end development deals with the client side, focusing on everything users interact with directly, like layout, design, and interactive elements. Java frameworks such as JavaFX and JavaServer Pages (JSP) are commonly used to create dynamic user interfaces. Key Skills for Front-End Developers: Proficiency in HTML, CSS, and JavaScript. Experience with Java frameworks (e.g., Spring MVC). Understanding of responsive design principles. Back-End Development 🖥️ Back-end development focuses on the server side, handling application logic, database interactions, and server configurations. Java is widely used in back-end development with technologies like Spring and Hibernate. Key Skills for Back-End Developers: Proficiency in Java and frameworks (e.g., Spring Boot). Understanding of RESTful services. Knowledge of databases (e.g., MySQL, PostgreSQL). Both roles are crucial for creating functional and user-friendly applications. What are your thoughts on these roles? Share below! 💬