Apache Tomcat migration tool for Jakarta EE

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  1. c05cc61 Fix warning by remm · 4 weeks ago master
  2. 5bf42bb Improve tests results by remm · 4 weeks ago
  3. c8ad07b Make the migration script executable by Emmanuel Bourg · 4 months ago
  4. 45d354c Set the version to 0.0.2 by Emmanuel Bourg · 5 months ago 0.0.2
  5. 3b3224d Updated the dependency on Ant (1.10.8) by Emmanuel Bourg · 5 months ago

Apache Tomcat migration tool for Jakarta EE

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This tool is a work in progress.

The aim of the tool is to take a web application written for Java EE 8 that runs on Apache Tomcat 9 and convert it automatically so it runs on Apache Tomcat 10 which implements Jakarta EE 9.

The tool can be used from the command line or as an Ant task.



Build the migration tool with:

./mvnw verify


Migrate your Servlet application with:

java -jar target/jakartaee-migration-*-shaded.jar <source> <destination>

The source should be a path to a compressed archive, a folder or an individual file. The destination will be created at the specified path as a resource of the same type as the source.

INFO This tool will remove cryptographic signatures from JAR files contained in the source, as the changed resources would not match them anymore.

A warning will be logged for each JAR file where the signature has been removed.

Ant task

The migration tool is available as an Ant task, here is an example:

<taskdef name="javax2jakarta" classname="org.apache.tomcat.jakartaee.MigrationTask" classpath="jakartaee-migration-*-shaded.jar"/>

<javax2jakarta src="webapp.war" dest="webapp.migrated.war" profile="tomcat"/>

Differences between Java EE 8 and Jakarta EE 9

Jakarta EE 9 is still under development and there are some details that remain to be worked out.

The differences currently supported by this tool are:

  • Renaming packages for Jakarta EE 9 APIs from javax.* to jakarta.*

Note: It will not be necessary to migrate any references to XML schemas. The schemas don't directly reference javax packages and Jakarta EE 9 will continue to support the use of schemas from Java EE 8 and earlier.