Added GitHub action

.github/workflows/maven-publish.yml

@@ -0,0 +1,56 @@
+#
+# Copyright (C) 2015-2022 Philip Helger (www.helger.com)
+# philip[at]helger[dot]com
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+name: Maven build
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        java: [ '11', '17', '21' ]
+    name: Java ${{ matrix.Java }} build
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK ${{ matrix.Java }}
+      uses: actions/setup-java@v4
+      with:
+        java-version: ${{ matrix.Java }}
+        distribution: 'adopt'
+        server-id: ossrh
+        server-username: MAVEN_USERNAME
+        server-password: MAVEN_PASSWORD
+
+    - name: Cache local Maven repository
+      uses: actions/cache@v4
+      with:
+        path: ~/.m2/repository
+        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-maven-
+          
+    - name: Build and deploy with Maven
+      run: mvn --batch-mode --update-snapshots deploy
+      env:
+        MAVEN_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+        MAVEN_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}