Learn Beyond Java with me

  ♐ Git : Git is a version control system that allows developers to track changes to their code over time. It tracks code changes, creates branches for experimentation, and merges changes. It's essential for collaboration, version control, and project management. 🌟Version control system for tracking changes to code. 🌟Allows developers to work on the same codebase simultaneously. 🌟Creates branches for independent work on new features or bug fixes. 🌟 Merges changes back into the main codebase when ready. ♐ GitHub : It is a web-based platform built on top of Git. It provides additional features like hosting repositories(folders) in the cloud like we can save our files in cloud, it helps to developers by code sharing, issue tracking, and project management. 🌟GitHub stores your code in the cloud, making it accessible from anywhere with an internet connection. 🌟GitHub offers features like pull requests and code review, enabling teams to work together efficiently. 🌟Developers use ...

  👨‍🏫 Let's discuss about the HTTP Status codes which means a three-digit numbers that are returned by a server in response to a client's request made to the server. These codes provide information about the status of the request. 🌟 1xx Informational: These status codes indicate that the request has been received and the process is continuing. Example: 100 Continue – The server has received the request headers and the client should proceed to send the request body. 🌟 2xx Success: These codes indicate that the request was received, understood, and accepted successfully. Example: 200 OK – The request was successful. 🌟 3xx Redirection: These codes indicate that further action needs to be taken to complete the request. Example: 301 Moved Permanently – The requested page has been permanently moved to a new location. 🌟 4xx Client Error: These codes indicate that the client has made a mistake. Example: 404 Not Found – The requested resource could not be found on the server. 🌟 ...

  @GetMapping: This annotation is used to map HTTP GET requests onto specific handler methods in Spring MVC controllers. It is used to handle GET requests for a specific URI (Uniform Resource Identifier). it is like saying "When someone wants to view some information (like a list of books), use this method to get that information and show it to them." It's for retrieving data. @PostMapping: This annotation is used to map HTTP POST requests onto specific handler methods in Spring MVC controllers. It is used to handle POST requests for a specific URI. This one is for sending data to the server to create something new. Imagine you're adding a new book to a library. When you fill out a form online and hit "submit," that's a POST request. This annotation tells Spring Boot to use a specific method to handle creating new data. @PutMapping: This annotation is used to map HTTP PUT requests onto specific handler methods in Spring MVC controllers. It is used to ...

  Let's discuss about packaging structure in java, packages are like labeled boxes that contain related classes and resources. By organizing classes into packages, you can easily manage and find your code, avoid naming conflicts, control access to classes, share code with others, and package your code for distribution. In REST API's it's good to follow these packaging flow. 📦com.controller : his package contains the REST controllers. REST controllers are responsible for handling incoming HTTP requests, processing them, and returning the appropriate HTTP responses. They act as the entry point for external clients to interact with your application's functionality. Each controller class typically maps to a specific URI endpoint and defines methods to handle different HTTP methods (GET, POST, PUT, DELETE, etc.). 📦com.service : This package contains the service layer components. Service classes encapsulate the business logic of your application. Services are responsible f...

  Spring contain 2 IOC(Inversion of control) containers which are used to store beans(Objects). 1) Bean factory( Lazy loading) 2)Application context(Eager loading) these both are Interfaces and the implementation classes of ApplicationContext  are 1)ClassPathXmlApplicationContext & 2)AnnotationConfigApplicationContext ⭐ ClassPathXmlApplicationContext: 👉This implementation is used to load the Spring beans configuration from XML files located in the classpath.  👉 It scans the classpath for XML configuration files and initializes the beans defined in those files.  👉 Example: ApplicationContext context=new ClassPathXmlApplicationContext("beans.xml"); ⭐ AnnotationConfigApplicationContext: 👉 This implementation is used to load Spring beans configuration from Java-based configuration classes annotated with @Configuration. 👉It scans the packages provided to it for classes annotated with @Configuration, @ComponentScan, @Bean, etc., and initializes the beans based on ...

  ⭐Spring: 👉 It Requires manual configuration for various aspects of the application, such as dependency injection, database connections, and web configurations. 👉We need to explicitly manage dependencies by including them in the project's configuration files (e.g., XML configuration, Java configuration). 👉Typically requires an external application server (e.g., Apache Tomcat, Jetty) for deploying applications. 👉 We need to manually configure features such as health checks, metrics, and externalized configuration for building production-ready applications. 👉 Offers a flexible but sometimes complex development experience due to the need for manual configuration and setup. ⭐SpringBoot: 👉It Offers auto-configuration, which automatically configures the Spring application based on the dependencies present in the classpath. This reduces the need for manual configuration. 👉It Simplifies dependency management by providing starter dependencies, which are pre-configured sets of depend...

  ⭐ Configuration: 👉 The main use of Configuration in Hibernate is to provide all the necessary information about your database 👉 It specifies the details of your database connection, such as the URL, username, password, and driver class in XML file. This allows Hibernate to establish a connection to your database. 👉 Once we done configuration we can use it to create a SessionFactory. Example: Configuration config=new Configuration( ); ⭐ SessionFactory: 👉The SessionFactory is like a factory it produces Session objects 👉 SessionFactory is a heavyweight object that's created once, usually during the startup of your application 👉 When your application needs to interact with the database, it requests a Session from the SessionFactory. The Session acts as a gateway to the database, allowing you to perform database operations such as saving, updating, or querying data. Example: SessionFactiory sf=config.buildSessionFactory( ); ⭐ Session: 👉 In Hibernate, a Session is a crucial com...

  Let's discuss about the @One-To-One, @One-To-Many, @Many-To-One, @Many-To-Many annotations in hibernate these are used to define the relationships between entities in the Java application and the corresponding tables in the relational database. ⭐ @One-To-One: 👉 Represents a one-to-one relationship between two entities. 👉 It is used when each record in one table corresponds to exactly one record in another table. 👉 example: a person can only have one Aadhar Card. ⭐ @One-To-Many: 👉 Represents a one-to-many relationship between two entities. 👉 It is used when each record in one table can have multiple related records in another table. 👉 example: one department can have many employees. ⭐ @Many-To-One: 👉 Represents a many-to-one relationship between two entities. 👉 It is used when multiple records in one table can be associated with a single record in another table. 👉 example: multiple orders can associated with one customer. ⭐ @Many-To-Many : 👉 Represents a many-to-many r...