From java-instrumentation
Use this skill whenever the user needs to build and deploy a Spring Boot 4.x application with Java 21. Triggers on mentions of Spring Boot 4 setup, Java 21 Spring Boot, latest Spring Boot deployment, or Spring Boot 4.0.2 application setup.
How this skill is triggered — by the user, by Claude, or both
Slash command
/java-instrumentation:setup-springboot4xThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
Build and deploy a Spring Boot 4.0.2 REST API application with Java 21 (OpenJDK), featuring payload-to-custom-tags functionality.
README.mdreferences/1a-TODO-JAVA.mdreferences/mvnwreferences/mvnw.cmdreferences/pom.xmlreferences/src/main/java/com/jekbao/springboot4dot0dot2__openjdk21__payload2customtags/PayloadToSpanTagsController.javareferences/src/main/java/com/jekbao/springboot4dot0dot2__openjdk21__payload2customtags/Springboot4dot0dot2Openjdk21Payload2customtagsApplication.javareferences/src/main/resources/application.propertiesreferences/src/test/java/com/jekbao/springboot4dot0dot2__openjdk21__payload2customtags/Springboot4dot0dot2Openjdk21Payload2customtagsApplicationTests.javaBuild and deploy a Spring Boot 4.0.2 REST API application with Java 21 (OpenJDK), featuring payload-to-custom-tags functionality.
The complete application source is in references/.
cd references/
./mvnw clean package
./mvnw spring-boot:run
The application starts on http://localhost:8080.
See README.md for full documentation.
curl http://localhost:8080/api/data
# Expected: JSON response
Cause: Java version is not 21.
Fix: Install Java 21: sdk install java 21-open or set JAVA_HOME to Java 21.
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