Spring Boot without Parent POM

There can be situations wherever you don't need the spring-boot-starter-parent dependency, but you need dependency management, you can utilize the <scope> tag as follows:

<dependencyManagement>  
<dependencies>  
<dependency><!-- Imports dependency management  -->  
<groupId>Enter Group ID</groupId>  
<artifactId>spring-boot-dependencies</artifactId>  
<version>2.2.2.RELEASE</version>  
<type>pom</type>  
<scope>import</scope>  
</dependency>  
</dependencies>  
</dependencyManagement>

Overrides are not allowed in the above dependencies. To achieve the override, you must add the entry in the <dependencyManagement> tag to your project before the spring-boot- dependencies entry.

In case, you need to upgrade another spring-data-eleasetrain, append the dependency to the pom.xml file as mentioned below:

<dependencyManagement>  
<dependencies>  
<!--Override Spring Data release train-->  
<dependency>  
<groupId>org.springframework.data</groupId>  
<artifactId>spring-data-releasetrain</artifactId>  
<version>Fowler-SR2</version>  
<type>pom</type>  
<scope>import</scope>  
</dependency>  
<dependency>  
<groupId>org.springframework.boot</groupId>  
<artifactId>spring-boot-dependencies</artifactId>  
<version>2.2.2.RELEASE</version>  
<type>pom</type>  
<scope>import</scope>  
</dependency>  
</dependencies>  
</dependencyManagement>  

Spring Boot Starters

Spring Boot provides a set of launchers that you can utilize to add jars to your classpath. Spring Boot's built-in starter makes development easier and faster. Spring-Boot-Starters is a dependency descriptor.

Every Spring Boot Framework accompanies the indistinguishable naming pattern: spring-boot-starter *, where * specify a distinct application type. In case, you are working on Spring and JPA for database admittance, you must comprehend the spring-boot-starter-data-JPA dependency in pom.xml file of your respective project.

Third Party Launcher

You can also include a third party launcher in your project. However, it does not utilize spring-boot-starter to include third-party dependencies. The spring-boot-starter is restrained for the definite Spring Boot artifact. It begins with the name of the project. Let’s understand more with the help of an example, suppose third party project name is zyz then the dependency name is zyz-spring-boot-starter. 

The Spring Boot Framework gives the application launchers for the org.springframework.boot group as mentioned below.