Upgrade to JDK 21, multi-stage Dockerfile and GitHub Actions CI

.github/workflows/ci.yml

@@ -0,0 +1,52 @@
+name: Java CI with Maven and Docker
+
+on:
+  push:
+    branches: [ "master", "main" ]
+  pull_request:
+    branches: [ "master", "main" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up JDK 21
+      uses: actions/setup-java@v4
+      with:
+        java-version: '21'
+        distribution: 'temurin'
+        cache: maven
+
+    - name: Verify Java version
+      run: java -version
+
+    - name: Build with Maven
+      run: mvn -B clean package --file pom.xml
+
+    - name: Log in to the Container registry
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Extract metadata (tags, labels) for Docker
+      id: meta
+      uses: docker/metadata-action@v5
+      with:
+        images: ghcr.io/${{ github.repository }}
+        tags: |
+          type=sha
+          type=ref,event=branch
+
+    - name: Build and push Docker image
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -1,9 +1,26 @@
-FROM eclipse-temurin:17-jdk-alpine
-MAINTAINER megadotnet
-ENV TZ=Asia/Shanghai
-VOLUME /tmp
-ARG JAR_FILE
-ADD target/*.jar app.jar
-ENTRYPOINT ["java","-Djava.security.egd=file:/dev/./urandom","-jar","/app.jar"]
-
-HEALTHCHECK --start-period=30s --interval=30s --timeout=5s --retries=3  CMD curl -m 5 --silent --fail --request GET http://localhost:7080/actuator/health | jq --exit-status -n 'inputs | if has("status") then .status=="UP" else false end' > /dev/null || exit 1
+FROM eclipse-temurin:21-jdk-jammy AS build
+
+RUN apt-get update && apt-get install -y maven
+
+WORKDIR /app
+
+COPY pom.xml .
+COPY src ./src
+
+RUN mvn clean package -DskipTests
+
+FROM eclipse-temurin:21-jre-jammy
+
+ENV SERVER_PORT=8080
+
+RUN groupadd -r appuser && useradd -r -g appuser appuser
+
+USER appuser
+
+WORKDIR /app
+
+COPY --from=build /app/target/*.jar app.jar
+
+EXPOSE 8080
+
+ENTRYPOINT ["java", "-jar", "app.jar"]

pom.xml

@@ -7,8 +7,7 @@
     <packaging>jar</packaging>
     <description>spring-boot demo application</description>
     <properties>
-        <maven.compiler.source>21</maven.compiler.source>
-        <maven.compiler.target>21</maven.compiler.target>
+        <maven.compiler.release>21</maven.compiler.release>
         <commons.io.version>2.14.0</commons.io.version>
         <commons-lang.version>3.14.0</commons-lang.version>
         <jjwt.version>0.6.0</jjwt.version>
@@ -30,8 +29,7 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.8.1</version>
                 <configuration>
-                    <source>21</source>
-                    <target>21</target>
+                    <release>21</release>
                 </configuration>
             </plugin>
             <plugin>

src/main/java/com/app/login/service/impl/MailServiceImpl.java

@@ -56,7 +56,7 @@ public class MailServiceImpl implements IMailService {
 
     private String baseUrlValue;
 
-    public MailServiceImpl(JavaMailSender javaMailSender, MessageSource messageSource, SpringTemplateEngine templateEngine) {
+    public MailServiceImpl(JavaMailSender javaMailSender, @org.springframework.beans.factory.annotation.Qualifier("messageSource") MessageSource messageSource, SpringTemplateEngine templateEngine) {
 
         this.javaMailSender = javaMailSender;
         this.messageSource = messageSource;