fix: correctly set Java version in maven and CI

Author: cortlepp

.github/workflows/ci.yml

@@ -49,7 +49,7 @@ jobs:
         java-version: ${{ matrix.java }}
         distribution: ${{ env.DEFAULT_JAVA_DISTRIBUTION }}
     - name: Build
-      run: mvn -B -e -Papache-release -Dgpg.skip=true verify
+      run: mvn -B -e -Papache-release -Dgpg.skip=true -Dmaven.compiler.release=${{ matrix.java }} verify
     - name: Remove Snapshots
       run: find ~/.m2/repository -name '*-SNAPSHOT' -a -type d -print0 | xargs -0 rm -rf
   site:
@@ -72,7 +72,7 @@ jobs:
         java-version: ${{ env.BASE_JAVA_VERSION }}
         distribution: ${{ env.DEFAULT_JAVA_DISTRIBUTION }}
     - name: Build
-      run: mvn -B -e -Dmaven.test.skip=true package site-deploy
+      run: mvn -B -e -Dmaven.test.skip=true -Dmaven.compiler.release=${{ env.BASE_JAVA_VERSION }} package site-deploy
     - name: Remove Snapshots
       run: find ~/.m2/repository -name '*-SNAPSHOT' -a -type d -print0 | xargs -0 rm -rf
   deploy:
@@ -102,7 +102,7 @@ jobs:
         server-username: NEXUS_USER
         server-password: NEXUS_PW
     - name: Deploy
-      run: mvn -B -e -Papache-release -Dgpg.skip=true -Dmaven.test.skip=true deploy
+      run: mvn -B -e -Papache-release -Dgpg.skip=true -Dmaven.test.skip=true -Dmaven.compiler.release=${{ env.BASE_JAVA_VERSION }} deploy
       env:
         NEXUS_USER: ${{ secrets.NEXUS_USER }}
         NEXUS_PW: ${{ secrets.NEXUS_PW }}

pom.xml

@@ -507,7 +507,7 @@
              http://maven.apache.org/plugins/maven-site-plugin/examples/creating-content.html -->
         <axis2_version>${project.version}</axis2_version>
         <project.build.outputTimestamp>2025-03-04T22:45:29Z</project.build.outputTimestamp>
-        <maven.compiler.target>11</maven.compiler.target>
+        <maven.compiler.release>17</maven.compiler.release>
     </properties>
 
     <dependencyManagement>