How to Use the Spring Boot 2.7 to 3 Migration Prompt to Upgrade Without Breaking Production

Spring Boot 3 is a bigger jump than a normal version bump. It needs Java 17, moves Jakarta EE imports from javax to jakarta, brings Spring Security 6 and Hibernate 6, and changes some defaults that only show up in production, such as trailing slash matching. Teams that try to do it all in one pull request often end up with a branch that compiles but fails in odd places. The Spring Boot 2.7 to 3.x Migration Planner: Java 17 Baseline, javax to jakarta Imports, Spring Security 6 SecurityFilterChain and requestMatchers, Hibernate 6 Sequence Naming, Trailing Slash Matching, properties-migrator, and OpenRewrite prompt turns your build file and configuration into a phased plan with code for each change.

What the prompt produces

1. A phased plan that clears deprecations on the last 2.7 release, moves to Java 17, then upgrades to Boot 3.
2. An OpenRewrite step that runs the Spring Boot 3 recipe on a branch before you edit anything by hand.
3. A javax to jakarta map that also lists the Java SE packages that do not move.
4. A dependency table with Jakarta compatible versions or replacements and blockers.
5. A Spring Security 6 rewrite of your current configuration with before and after code.
6. Hibernate 6 checks for sequence naming, query syntax, and custom types.
7. A trailing slash plan for clients that call URLs ending in a slash.
8. A properties step using the properties migrator to find renamed keys.
9. A test and release checklist ending in a canary release.

How to fill the inputs

BuildFile gives the Spring Boot, Java, and library versions from your pom.xml or build.gradle.

SecurityConfig is your current security class. Paste it as is so the rewrite matches your rules.

JpaUsage covers ID generation strategies, the database, native queries, and custom types. Sequence naming problems start here.

WebEndpoints lists endpoints and the clients that call them, especially any that use trailing slashes.

Integrations names tracing, API docs, caching, and messaging libraries, since several of them were replaced in the Boot 3 era.

TargetAndTests sets the target version and describes your test setup.

Reading the example output

The example is a Maven service on Boot 2.7.18 and Java 11, using springfox, Spring Cloud Sleuth, Redis, and PostgreSQL, with a mobile app that calls order endpoints with trailing slashes.

• Two dependencies block the upgrade. Springfox is replaced with springdoc-openapi and Sleuth with Micrometer Tracing.
• Security is rewritten as a SecurityFilterChain bean with authorizeHttpRequests and requestMatchers, and method security moves to the new annotation.
• Hibernate 6 would look for new sequences. The plan keeps the legacy naming setting during the migration, then moves to per entity sequences with a Flyway migration later.
• Trailing slashes are handled on the server by mapping both paths until the mobile app ships its fix.
• The checklist tests what changed: security responses for each role, inserts for every entity, Swagger UI, and traces in Zipkin.

Tips for better results

• Release Java 17 on Boot 2.7 first. It isolates JVM issues from framework issues.
• Run OpenRewrite on a clean branch and review its diff in small commits.
• Run integration tests against a copy of the production schema, not an empty database.
• Watch 404 rates closely during the canary.

Mistakes to avoid

• Do not rename javax.sql or javax.crypto imports. They are part of Java SE.
• Do not leave the properties migrator in production.
• Do not assume old sequence names still work after the upgrade.
• Do not skip security tests because the configuration compiled.

Who it is for

Java backend engineers, tech leads planning framework upgrades, platform teams maintaining many Spring services, and consultants who run migrations for clients.

Related PromptDig links

Open the Spring Boot 2.7 to 3.x Migration Planner: Java 17 Baseline, javax to jakarta Imports, Spring Security 6 SecurityFilterChain and requestMatchers, Hibernate 6 Sequence Naming, Trailing Slash Matching, properties-migrator, and OpenRewrite prompt and paste your build file and security config to get your migration plan. For more coding and migration prompts, Browse more prompts. If you have a developer prompt that made an upgrade easier, Share a prompt.