Apache POI is a popular Java library that allows developers to create, modify, and display Excel files (.xls and .xlsx formats). In this tutorial, we will explore how to use Apache POI to perform common tasks such as reading, writing, and formatting Excel files. Table of Contents Introduction to Apache POI Setting up Apache…
Python is a versatile language that is widely used for network programming due to its simplicity and robustness. In this tutorial, we'll cover some fundamental concepts of network programming in Python, including working with sockets, creating a simple server and client, and making HTTP requests. Table of Contents Introduction to Sockets Creating a Simple…
In Jenkins, Shared Libraries allow you to write reusable code that can be used in multiple pipelines across different Jenkinsfiles. This tutorial will guide you through creating a Jenkins Shared Library, which can simplify your pipeline scripts, promote code reuse, and improve maintainability. Prerequisites Jenkins installed and running Basic familiarity with Groovy scripting Understanding…
In distributed systems, network issues and transient failures are common challenges. To handle these scenarios gracefully, it's essential to have retry mechanisms in place. Spring Retry, a subproject of the Spring Framework, provides a simple but powerful way to add retry capabilities to your Spring Boot applications. In this tutorial, we'll explore how to…
In Spring Boot applications, the @Scheduled annotation provides a convenient way to execute scheduled tasks. Whether you need to run a method at fixed intervals, after a specific delay, or based on a cron expression, @Scheduled offers flexibility and simplicity. In this tutorial, we'll explore how to use @Scheduled with various examples to schedule…
In a Spring Boot application, the concepts of Context Path and Servlet Path are essential for understanding how requests are handled and mapped to the appropriate controllers. These paths play a crucial role in routing incoming requests to the correct endpoints. In this tutorial, we'll explore the differences between Context Path and Servlet Path…
In modern microservices architectures, communication between services is a critical aspect. Spring Boot provides two powerful tools for making HTTP requests to other services: @FeignClient and WebClient. In this tutorial, we will delve into these two approaches, discussing their differences, use cases, and providing examples to help you decide which one suits your needs…
Introduction:Node.js has gained immense popularity for building fast and scalable web applications. However, ensuring the security of these applications is crucial to protect against various vulnerabilities. Helmet is a popular Node.js middleware that helps secure Express applications by setting various HTTP headers. In this tutorial, we'll explore how to integrate Helmet into your Node.js…
In the Spring Framework, dependency injection is a fundamental concept. It allows you to externalize the dependencies of your components and manage them more effectively. However, sometimes you might encounter an "Unsatisfied Dependency" error, which can be a bit confusing, especially for beginners. In this tutorial, we'll delve into what an unsatisfied dependency is…
In this tutorial, we will introduce you to the basics of Machine Learning using Python and the popular machine learning library, Scikit-Learn. We'll cover the essential steps to get you started with building and training machine learning models. Prerequisites To follow along with this tutorial, you'll need to have Python installed on your machine.…