Migrate from javax to jakarta ee

Question

So I have a small application (not running in a web container) that uses some javax.* classes running on jdk8. The time has come to upgrade to jdk17. So I thought,easy enough, I download the jakarta ee 9 (or 10) reference implementation .jar files, switch in the code javax. to jakarta.* namespace and we are good to go. Seems I can't find where I can download the reference implementation *jar files for jakarta ee 9 (or 10). So obviously I'm missing something. Can someone guide me to the good approach to solve this ?

Answer 1

I mostly use maven to handle my dependencies but hope this helps at least a bit.

For jaxb 3.x you can use following api-dependency

<dependency>
    <groupId>jakarta.xml.bind</groupId>
    <artifactId>jakarta.xml.bind-api</artifactId>
    <version>3.0.1</version>
</dependency>

Then for implementation you can use the following.

<dependency>
    <groupId>com.sun.xml.bind</groupId>
    <artifactId>jaxb-impl</artifactId>
    <version>3.0.0</version>
</dependency>

If you need to generate classes from xsd you can use jaxb2-maven-plugin 3.1.0. It seems to only depend on jakarta.xml.bind-api while including rest as nested dependencies.

<!-- 
  by default searches schemas from src/main/xsd 
  and binding files from src/main/xjb
-->
<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>jaxb2-maven-plugin</artifactId>
    <version>3.1.0</version>
    <executions>
        <execution>
            <id>xjc</id>
            <goals>
                <goal>xjc</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <packageName>com.example.api</packageName>
    </configuration>
</plugin>

Not sure about javax.activation