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What is java spring boot? Everything you need to know

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Java Spring Boot is a concept every Java developer needs to understand well. Whether for beginners or developers, Spring Boot is a trending concept of Java web development.
Spring Boot is a fundamental concept asked about by interviewers in an introductory Java web development interview.
This post is written to simplify the concept of spring boots for developers. We clear up the whole idea with the definition of the proper implementation of Spring Boot in your development.
In short, this comparative article helps clarify the concept of Spring Boot with sharp detail.
java spring boot

What is Java Spring Boot?

Spring Boot is an open-source tool and is part of the larger Java Spring Framework. It simplifies using Java-based frameworks and is designed explicitly for creating microservices and web applications.

Every developer knows the framework because of its popularity. It is widely used in developing various applications.

Spring Boot automates Java Spring Framework development, saving time. It enables efficient REST API creation.

Spring Boot makes Java development easier for developers. Some of its best features help create top applications with minimal configuration and boilerplate code. It affords embedded servers for smooth deployment and tracking.

Additionally, Spring Boot offers robust dependency management and automatic configuration, permitting developers to be conscious of covering project common sense instead of dealing with whole project issues.

What is Spring Boot Microservices Communication?

“micro” means dividing the code into small, manageable parts or components. Each core function, or “service,” is made and used independently from the other services.
These independent parts collaborate and talk to each other through specified API documents known as contracts. There are several advantages to using microservices.
For instance, since this approach involves distributing and loosely connecting components, the application doesn’t stop working if one part has a problem.
If you’re working on a Spring Boot project with multiple microservices, you may need to have microservice m1 communicate with microservice m2. The business use case will determine whether this communication is synchronous or asynchronous.

Synchronous Way:

1.REST Template: Uses the RestTemplate class to perform HTTP requests. For example, we can use the getForEntity method to invoke the user-service URL and handle exceptions on the service side.

2. Feign: Requires additional configuration but offers advantages like not hard-coding URLs and using Eureka Client ID for server discovery.

Asynchronous Way:

A message broker can be used as an intermediary between m1 and m2 for asynchronous communication.
In this case, when m1 needs to communicate with m2, m1 pushes a message to the broker instead of sending it directly to m2. Depending on the type of broker (e.g., ActiveMQ or Kafka), the message is conveyed to the listener of m2, and actions are taken accordingly.

This asynchronous approach is practical, for instance, when updating various stages of order in the developer service and notifying the operator service about each status update.

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Why is Spring Framework so popular?

Spring Boot became very popular shortly after its release because it offers many features. So, we compare it to other market frameworks and identify the factors that make it a better choice.
  • Speedy Development: Accelerates project development with streamlined processes.
  • Easy Configuration: Simplifies configuration through sensible defaults and annotations.
  •  Embedded Servers: Eliminates the need for separate web servers, simplifying deployment.
  •  Annotation Convenience: Promotes annotation-based development, reducing verbosity.
  •  Productivity Boost: Minimizes repetitive tasks, allowing focus on business logic.
  •  Ecosystem Integration: Seamlessly integrates with Spring projects and third-party tools.
  •  Database Integration: Simplifies database connectivity without extensive manual setup.
  •  CLI Support: Offers a command line interface for efficient development and testing.
  •  Build Tool Compatibility: Supports popular build tools like Maven and Gradle.

This is the reason behind the gain in speedy popularity of Java Spring Boot in developer’s minds. With the increasing demand for software and mobile application development, this tool comes with a combination of features that make it easy to use in one tool.

What Spring Boot adds to Spring Framework

Even though the Spring Framework is robust, putting it in place and deploying Spring applications may take time and effort
That’s where Java Spring Boot is available, making things less difficult with three essential capabilities:


You don’t need to set up dependencies with Java Spring Boot manually. It robotically configures your app primarily based on your choices and exceptional practices, saving you time and lowering the danger of mistakes.

Opinionated Approach

Dependency injection in Java Spring Boot is more accessible than other technologies. Instead of you making all the choices, it alternatives the proper ones to your assignment throughout the setup.
You can pick out your project’s wishes from a list of starters, making it less complicated and faster. For instance, if you want to construct an internet app, you may choose the ‘Spring Web’ starter, which will unite the whole thing you want.

Standalone Applications

Spring Boot architecture helps create applications that run by themselves. You want something other than an external web server, as it consists of one for your app.
In this manner, you can, without difficulty, run your app on any platform with a simple command. You may not encompass an embedded net server if you don’t want this option.
Spring Boot’s recognition of standalone programs makes matters extra flexible and straightforward.

Spring Boot vs. Spring Framework

Spring Boot offers a quicker and easier opportunity to the Spring Framework, bearing in mind smooth utility dependencies addition and preserving all Spring Framework features like event managing, validation, statistics binding, security, and trying out.
Let’s understand the difference with table

Goals of Java Spring Boot in Development

Reduced development, unit, and integration test times are the primary goals of Spring Boot. Spring Boot makes your development process hassle-free and quick.

Reducing Development Time

Spring Boot aims to make it faster to build applications. So you can speed up your development process and grow more quickly in the development sector.

Easier Testing

It’s now not just about constructing; Spring Boot wants to make trying out your software more accessible, too. Unit checks and integration checks are made more sincere so that you can be confident that your app works best.

Opinionated Development

Spring Boot has a particular manner of operating, often known as an “opinionated” technique. This means it shows a hard and fast set of first-class practices to make development smoother.

Less Configuration Hassle

Spring Boot reduces the need for many unique configurations. You do not have to write lengthy settings lists or deal with complex XML documents. This makes your lifestyle as a developer easier because you can focus on the vital parts of your software.

Avoiding Import Statement Overload

When you are writing code, you usually want to import various programs. Spring Boot helps you avoid uploading too many things, keeping your code cleaner and more plausible.
Spring Boot wants to save developers time and effort by offering a clear direction for improvement, minimizing the need for excessive configuration, and retaining things easily and super fast.
future trends

A Guide to Logging Frameworks and Configuration in Spring Boot

Developers can diagnose problems, track down issues, and gain insight into an application’s behavior with the help of logging.
Spring Boot provides built-in support for various logging frameworks, making it flexible for developers to choose the best fit their needs.

Here are some popular logging frameworks supported by Spring Boot:

1. Java Util Logging (JUL):

Configuration: Spring Boot provides a default configuration for JUL. You can configure JUL by placing a logging.properties file in the classpath.
Dependency: No additional dependencies are required as JUL is part of the Java standard library.

2. Logback:

Configuration: Spring Boot uses Logback as the default logging framework. The configuration is done through a file named logback-spring.xml or logback.xml in the classpath.
Dependency: To use Logback, you include the spring-boot-starter-logging dependency, and it will transitively bring in the necessary Logback libraries.

3. Log4j 2:

Configuration: To use Log4j 2, you can include the spring-boot-starter-log4j2 dependency. Configuration is typically done using a log4j2.xml file in the classpath.
Dependency: Spring Boot provides a starter module for Log4j 2, making it easy to include in your project.

4. Slf4j (Simple Logging Facade for Java):

Integration: Spring Boot integrates with SLF4J, a logging facade that provides an abstraction over various logging frameworks.
Configuration: You can use SLF4J along with any compatible implementation like Logback, Log4j 2, or JUL.
Dependency: Spring Boot includes SLF4J by default, and you can include the implementation of your choice.

5. Console Logging:

Spring Boot also supports simple console logging without any additional dependencies. It is a basic logging mechanism that writes log messages to the console.
To use a specific logging framework, you need to include the corresponding starter dependency in your project’s build configuration. For example:
  • For Logback: spring-boot-starter-logging
  • For Log4j 2: spring-boot-starter-log4j2

You can disable the default logging starter if you want to use a different framework.

In the application, properties or application.yml file, you can configure logging properties, such as log levels, file paths, and pattern layouts.
Because of its great flexibility in customization, Spring Boot’s logging system helps developers modify it to fit their unique requirements.

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How Spring Boot features help to streamline Java programming tasks

When discussing the benefits, cover each point about the spring boot above in terms of why it is popular. Here are some essential service benefits of Spring Boot that contribute to its popularity.
Easy to Run: With a simple command, you can run your software as a standalone jar report. There is no need for complex setups.
Environment Switching Made Simple: Spring Boot architecture makes it smooth to replace extraordinary environments, like checking out and production, by converting a simple setting.
Monitoring Your App: With the Spring Boot actuator, you can, without difficulty, keep an eye fixed on how your software is doing. It’s like having a dashboard on your app’s health.
Less headache with configuration: Spring Boot looks after loads of configuration details for you. Less time handling settings means way more time constructing your genuine software.
Quick Development: It enables you to construct things quickly. So, you spend less time coding and more time developing and thinking of better solutions.
Easy to Connect with Other Services: Spring Boot makes it a breeze if your app wants to speak to different offerings or databases. There is no need to be a networking expert.

Java Spring Boot Best Practices

Here, we want to share some best practices for Java-based configuration in a Spring Boot project to improve your development process.

Java-based Configuration

Instead of XML configuration, use Java-based configuration for your Spring Boot application. This involves using annotations like @Configuration, @Bean, @ComponentScan, etc., to configure your application.


Use the auto-configuration feature of Spring Boot to set up your application automatically depending on the dependencies you include.  Spring Boot provides sensible defaults, reducing the need for manual configuration.

Spring Initializr

Use Spring Initializr to bootstrap new Spring Boot projects. It’s a web-based tool that helps you set up the basic structure of your project with the necessary dependencies and configurations.

Clean and Focused @Controller

Keep your @Controller classes clean and focused on handling HTTP requests and responses. Avoid putting business logic directly into the controllers. Instead, delegate the business logic to service classes.

Locating the Main Application Class

Ensure that your main application class is located in the root package of your project. This helps Spring Boot find and register components through component scanning.

Effective Exception Handling

Implement effective exception-handling mechanisms in your application. Use @ControllerAdvice for global exception handling. Provide meaningful error messages and use appropriate HTTP status codes.

Data Access with Spring Data JPA

Use Spring Data JPA for simplified and efficient data access. Define repository interfaces that extend JpaRepository or other Spring Data interfaces to perform CRUD operations without writing boilerplate code.

These practices make your developing process easy and help to simplify your work.


As per the rising demand and adaptability of using Java Spring Boot in development, this Java Spring Boot guide is the best resource for the developer for knowledge and practice.

From its fundamental concepts to advanced features, the post is a valuable resource for beginners and expert developers.
We cover every detail that needs to be understood before choosing Java Spring Boot for your software development technology.

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Krunal Malani

Web Developer
Krunal Malani, a seasoned Web Developer with over 7 years of experience, excels in PHP, Laravel, WordPress, CodeIgniter, VueJS, and NodeJS technologies. Renowned for crafting dynamic and innovative web solutions, he is committed to staying current with industry trends ensuring the delivery of high-quality projects. With a proven track record, he offers expertise, creativity, and dedication to excellence in every web development project.


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