SpringBoot Tutorial

The Spring Boot tutorial provides basic and advanced concepts of the Spring Framework. Our Spring Boot tutorial is aimed at beginners and professionals.

Spring Boot is a Spring module that provides RAD (Rapid Application Development) functionality for the Spring framework.

Our Spring Boot tutorial covers all topics of Spring Boot, such as features, projects, Maven projects, startup project wizard, Spring Initializr, CLI, applications, annotations, dependency management, properties, starters, executors, JPA, JDBC, and more.

What is Spring Boot

Spring Boot is a project built on top of the Spring framework. It provides a simple and quick way to set up, configure, and run simple web-based applications.

It is a Spring module that provides RAD (Rapid Application Development)It is used to create independent Spring-based applications because it requires the least amount of Spring configuration, therefore it can run.

In short, Spring Boot is Spring Framework and 嵌入式服务器embedded server

combination.

In Spring Boot, there is no need for XML configuration (deployment descriptor). It uses the convention over configuration software design paradigm, which means developer workload can be reduced. We can use Spring STS IDE or Spring Initializr

to develop Spring Boot Java applications.

Why should we use the Spring Boot Framework?

We should use the Spring Boot Framework because: Dependency injection methods are used in Spring Boot. It includes powerful database transaction management features./It simplifies integration with other Java frameworks (such as JPA Hibernate ORM, Struts, etc.) integration.

It reduces the cost and development time of applications.

Together with the Spring Boot framework, many other Spring sister projects also help build applications that meet modern business needs. The following are the Spring sister projects: Spring Data: It simplifies access from relational databases and NoSQL database data access. Spring Batch:It provides powerfulbatch processing processing. Spring Security:Spring Boot uses universal logging for all internal records. The default manages logging dependencies. If customization is not required, we should not change the logging dependencies.. This is a security framework that provides strong Spring Social:It supports integration with LinkedIn and othersenterprise applications social networks Spring Integration:It is an implementation of the enterprise integration pattern. Using lightweight messaging and declarative adapters, it helps integrate with otherenterprise applications

integration.

the advantages of Spring Bootit creates Spring applications, which can be run independently using Java -jar startup. With differentembedded HTTP server (such as Tomcat, Jetty etc.), it can easily test web applications. We do not need to deploy WAR files. It provides useful' starter 'POM, to simplify our Maven configuration. It providesproduction-readyfeatures, such asmetrics, health checksandexternalized configuration.. No XML . It provides a configuration for developing and testing Spring Boot applications CLI tools. It provides manyplugins. It also minimizes the need to write multipleSample code(Must be included in many places with almost no changes), XML configuration and comments. ItEnhance productivityand reduce development time.

Spring Boot limitations

Spring Boot can use dependencies that are not used in the application. These dependencies increase the size of the application.

Spring Boot goals

The main goal of Spring Boot is to reduce development, unit testingand Integration testingtime.

Provide purposeful development methods Avoid defining more annotation configurations Avoid writing a large number of import statements Avoid XML configuration.

By providing or avoiding the above points, the Spring Boot Framework reduces development time, developer workloadand improve productivity.

Spring Boot prerequisites

To create a Spring Boot application, the following prerequisites must be met. In this tutorial, we will use Spring Tool Suite (STS) IDE.

Java 1.8 Maven 3.0 + Spring Framework 5.0.0.BUILD-SNAPSHOT It is recommended to use IDE (Spring Tool Suite).

Spring Boot features.

Web Development SpringApplication Application Events and Listeners Application Management properties enable it in the Spring Boot application. Spring Boot allows us to externalize our configuration so that we can use the same application in different environments. The application uses YAML files to externalize the configuration. such properties. It helps organize application properties. It provides a convenient way to specify a hierarchy. It is a superset of JSON. SpringApplication class automatically supports YAML. It is an alternative to property files. Strongly typed configuration is used for managing and validating the application's configuration. Application configuration is always a crucial task and should be strongly typed. We can also use annotations provided by this library. Spring Boot uses universal logging for all internal records. The default manages logging dependencies. If customization is not required, we should not change the logging dependencies.

Web Development

This is a very suitable Spring module for Web application development. We can easily create a standalone HTTP application that uses Tomcat, Jetty or embedded servers like Undertow. We can use spring-boot-starter-web module to quickly start and run applications.

SpringApplication

SpringApplication is a class that provides a convenient way to bootstrap Spring applications. It can start from the main method. We can invoke the application simply by calling the static run() method.

public static void main(String[] args)
{　　
　　　　SpringApplication.run(ClassName.class, args);　　
}

Application Events and Listeners

Spring Boot uses events to handle various tasks. It allows us to create factory files for adding listeners. We can use ApplicationListener keyto refer to it.

Always in META-INF folder to create factory files, for example META-INF/spring.factories .

Application Management

Spring Boot provides the functionality to enable and manage administrator-related features for applications. It is used for remote access and management of applications. We can use spring.application.admin.enabled spring.application.admin.enabled

properties enable it in the Spring Boot application.

External Configuration

Spring Boot allows us to externalize our configuration so that we can use the same application in different environments. The application uses YAML files to externalize the configuration.

property files Spring Boot provides a rich set ofApplication Properties . Therefore, we can use it in the project's property file. This property file is used to set such things as-server 8Copyright ©82 port =

such properties. It helps organize application properties.

YAML Support

It provides a convenient way to specify a hierarchy. It is a superset of JSON. SpringApplication class automatically supports YAML. It is an alternative to property files.

Type-safe Configuration

Strongly typed configuration is used for managing and validating the application's configuration. Application configuration is always a crucial task and should be strongly typed. We can also use annotations provided by this library.

Logging

Spring Boot uses universal logging for all internal records. The default manages logging dependencies. If customization is not required, we should not change the logging dependencies.

Security