Create a Spring Boot Java application using SAP BTP

The Fullstack-type development space comes with several out-of-the-box extensions that are used to develop CAP applications, such as built-in CDS tools.

Open a new terminal window:

Enter the command cd projects/ :

Run the following command line:

mvn -B archetype:generate -DarchetypeArtifactId=cds-services-archetype -DarchetypeGroupId=com.sap.cds \
-DarchetypeVersion=1.17.0 \
-DgroupId=com.sap.cap -DartifactId=products-service -Dpackage=com.sap.cap.productsservice

Below is an explanation of this parameter.

• archetype:generate: The full name is org.apache.maven.plugins:maven-archetype-plugin:3.2.1:generate, where archetype means archetype.

Generate a new project from the prototype, and update the actual project if a partial prototype is used. If the project is fully generated, it is generated in the directory corresponding to its artifactId. If the project is updated with a partial prototype, it is done in the current directory.

Refer to link .

After running, use the prototype to generate the project skeleton:

Open workspace：

Among them, db stores database-related resources, and srv folder stores Java-related codes.

CAP applications use Core Data Services (CDS) to describe:

• Data structure using entity definition ( entity definitons )
• Use services to define how to use data structures

Create a new file in the srv folder and name it ``:

Define an entity definition named Products :

service AdminService {
    entity Products {
        key ID : Integer;
        title  : String(111);
        descr  : String(1111);
    }
}

Execute the mvn clean install command:

Make sure to see the message for BUILD SUCCESSFUL .

When we used the command line mvn -B archetype:generate to create the project skeleton before, Application.java was automatically generated:

The Application.java file can be opened directly with ctrl + p:

Start the template application using the command line mvn clean spring-boot:run :

Prompt that there is an application listening on port 8080. Click Expose and Open .

Port 8080 has been exposed and listening services can be accessed externally. To see the mapped URL, use the "Ports: Preview" command.

Open the command panel:

Execute ports:preview view the url:

I saw the url of the application:

https://workspaces-ws-pdwk4-app1.us10.trial.applicationstudio.cloud.sap

The naming convention for this url:

The highlighted id is the workspace id: