Migrate from Java 8 to Java 11

- Update java.version from 1.8 to 11 in pom.xml
- Upgrade Spring Boot from 2.0.2.RELEASE to 2.7.18
- Add maven-compiler-plugin 3.11.0 with release=11
- Add maven-surefire-plugin 3.1.2 for Java 11 module handling
- Fix packaging from pom to jar for proper compilation
- Update build.gradle: sourceCompatibility/targetCompatibility to 11,
  Spring Boot plugin to 2.7.18, compile->implementation syntax
- Add GitHub Actions CI workflow for Java 11
- Update README prerequisites to specify Java 11 SDK

Co-Authored-By: derek.wu <derekwu35@gmail.com>

Author: devin-ai-integration[bot]

.github/workflows/ci.yml

@@ -0,0 +1,24 @@
+name: Java CI
+
+on:
+  push:
+    branches: [ main, master ]
+  pull_request:
+    branches: [ main, master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 11
+        uses: actions/setup-java@v4
+        with:
+          java-version: '11'
+          distribution: 'temurin'
+          cache: maven
+
+      - name: Build with Maven
+        run: mvn clean verify --batch-mode --no-transfer-progress

README.md

@@ -76,7 +76,7 @@ GET /datetime
 
 ### Prerequisites
 
-1) Java sdk
+1) Java 11 SDK (or later)
 2) POSTMAN
 
 ### Installing

build.gradle

@@ -3,7 +3,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath("org.springframework.boot:spring-boot-gradle-plugin:2.0.2.RELEASE")
+        classpath("org.springframework.boot:spring-boot-gradle-plugin:2.7.18")
     }
 }
 
@@ -22,11 +22,11 @@ repositories {
     mavenCentral()
 }
 
-sourceCompatibility = 1.8
-targetCompatibility = 1.8
+sourceCompatibility = 11
+targetCompatibility = 11
 
 dependencies {
-    compile("org.springframework.boot:spring-boot-starter-web")
-    testCompile("junit:junit")
+    implementation("org.springframework.boot:spring-boot-starter-web")
+    testImplementation("junit:junit")
 }
 

pom.xml

@@ -5,13 +5,13 @@
 
     <groupId>org.springframework</groupId>
     <artifactId>gs-spring-boot</artifactId>
-    <packaging>pom</packaging>
+    <packaging>jar</packaging>
     <version>0.1.0</version>
 
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.0.2.RELEASE</version>
+        <version>2.7.18</version>
     </parent>
 
     <dependencies>
@@ -35,12 +35,25 @@
     </dependencies>
 
     <properties>
-        <java.version>1.8</java.version>
+        <java.version>11</java.version>
     </properties>
 
 
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.11.0</version>
+                <configuration>
+                    <release>11</release>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>3.1.2</version>
+            </plugin>
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>