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javax-to-jakarta-migration

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by github · part of github/awesome-copilot

Migrate Java code from javax.* to jakarta.* namespace. Use when upgrading to Tomcat 11, Jakarta EE 10, or when javax imports are detected in the codebase.

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🧩 One of 7 skills in the github/awesome-copilot package — works on its own, and pairs well with its siblings.

Migrate Java code from javax.* to jakarta.* namespace. Use when upgrading to Tomcat 11, Jakarta EE 10, or when javax imports are detected in the codebase.

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This is the exact playbook injected into your agent when the skill activates — shown here so you can audit it before installing. You don't need to read it to use the skill.

by github

Migrate Java code from javax.* to jakarta.* namespace. Use when upgrading to Tomcat 11, Jakarta EE 10, or when javax imports are detected in the codebase. npx skills add https://github.com/github/awesome-copilot --skill javax-to-jakarta-migration Download ZIPGitHub36.2k

javax → jakarta Migration Skill

When to Use

  • Upgrading to Tomcat 11 / Jakarta EE 10+

  • Code review detects javax.* imports

  • Migrating an existing project to the jakarta namespace

Procedure

Step 1 — Scan for javax Usage

Search the codebase for all javax.* imports that need migration:

Copy & paste — that's it
javax.servlet.* → jakarta.servlet.*
javax.persistence.* → jakarta.persistence.*
javax.validation.* → jakarta.validation.*
javax.annotation.* → jakarta.annotation.*
javax.inject.* → jakarta.inject.*
javax.enterprise.* → jakarta.enterprise.*
javax.faces.* → jakarta.faces.*
javax.ws.rs.* → jakarta.ws.rs.*
javax.el.* → jakarta.el.*
javax.json.* → jakarta.json.*
javax.mail.* → jakarta.mail.*
javax.websocket.* → jakarta.websocket.*

Do NOT migrate these (they remain in javax.*):

  • javax.sql.* — part of JDK

  • javax.naming.* — part of JDK (JNDI)

  • javax.crypto.* — part of JDK

  • javax.net.* — part of JDK

  • javax.security.auth.* — part of JDK

  • javax.swing.*, javax.xml.parsers.* — JDK packages

Step 2 — Update pom.xml

Replace dependency coordinates:

Old New javax.servlet:javax.servlet-api jakarta.servlet:jakarta.servlet-api:6.0.0 javax.persistence:javax.persistence-api jakarta.persistence:jakarta.persistence-api:3.1.0 javax.validation:validation-api jakarta.validation:jakarta.validation-api:3.0.2 javax.annotation:javax.annotation-api jakarta.annotation:jakarta.annotation-api:2.1.1

Step 3 — Update web.xml (if present)

Copy & paste — that's it

Step 4 — Update Java Source Files

Replace all javax. imports with jakarta. equivalents in .java files.

Step 5 — Verify

  • Run mvn clean compile or gradlew build — fix any compilation errors

  • Run mvn test or gradlew test — ensure all tests pass

  • Search for any remaining javax.* imports (excluding JDK packages)

Output

Provide a migration summary listing all files changed, imports replaced, and any manual steps required.