BAEL-5633 - dockersing a simple java jar (#12454)

docker-modules/docker-java-jar/Dockerfile

@@ -0,0 +1,4 @@
+FROM openjdk:11
+MAINTAINER baeldung.com
+COPY target/docker-java-jar-0.0.1-SNAPSHOT.jar app.jar
+ENTRYPOINT ["java","-jar","/app.jar"]

docker-modules/docker-java-jar/pom.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-2</relativePath>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>docker-java-jar</artifactId>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>${maven-jar-plugin.version}</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <mainClass>com.baeldung.HelloWorld</mainClass>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

docker-modules/docker-java-jar/src/main/java/com/baeldung/HelloWorld.java

@@ -0,0 +1,8 @@
+package com.baeldung;
+
+public class HelloWorld {
+
+    public static void main(String[] args){
+        System.out.println("Welcome to our application");
+    }
+}

docker-modules/pom.xml

@@ -23,6 +23,7 @@
         <module>docker-images</module>
         <module>docker-spring-boot</module>
         <module>docker-spring-boot-postgres</module>
+        <module>docker-java-jar</module>
     </modules>
 
     <properties>

pom.xml

@@ -1400,6 +1400,7 @@
         <lombok.version>1.18.20</lombok.version>
         <h2.version>1.4.200</h2.version>
         <guava.version>31.0.1-jre</guava.version>
+        <maven-jar-plugin.version>3.2.2</maven-jar-plugin.version>
     </properties>
 
 </project>