Seems to have issues on Java 11... hopefully this helps.

Author: juliusmusseau

inoculator-1.0-SNAPSHOT.jar

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <!--
 /*
  * $Id$
@@ -21,15 +21,15 @@
  * under the License.
  */
 -->
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<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/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <parent>
         <groupId>org.apache.struts</groupId>
         <artifactId>struts2-apps</artifactId>
         <version>2.5.8</version>
     </parent>
-
     <artifactId>struts2-showcase</artifactId>
     <packaging>war</packaging>
     <name>Struts 2 Showcase Webapp</name>
@@ -45,8 +45,18 @@
             </properties>
         </profile>
     </profiles>
-    <dependencies>
 
+    <dependencies>
+        <dependency>
+            <groupId>javax.activation</groupId>
+            <artifactId>activation</artifactId>
+            <version>1.1.1</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.xml.bind</groupId>
+            <artifactId>jaxb-api</artifactId>
+            <version>2.3.0</version>
+        </dependency>
         <dependency>
             <groupId>commons-fileupload</groupId>
             <artifactId>commons-fileupload</artifactId>
@@ -60,61 +70,49 @@
             <version>3.2.1</version>
         </dependency>
 
-
         <!-- https://mvnrepository.com/artifact/org.bouncycastle/bcprov-jdk15on -->
         <dependency>
             <groupId>org.bouncycastle</groupId>
             <artifactId>bcprov-jdk15on</artifactId>
             <version>1.46</version>
         </dependency>
-
-
         <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-config-browser-plugin</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-sitemesh-plugin</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-tiles-plugin</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-dwr-plugin</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-json-plugin</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.apache.tiles</groupId>
             <artifactId>tiles-jsp</artifactId>
             <scope>runtime</scope>
         </dependency>
-
         <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-convention-plugin</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-spring-plugin</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.apache.struts</groupId>
             <artifactId>struts2-bean-validation-plugin</artifactId>
         </dependency>
-
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>servlet-api</artifactId>
@@ -143,36 +141,30 @@
             <groupId>org.apache.velocity</groupId>
             <artifactId>velocity</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.apache.velocity</groupId>
             <artifactId>velocity-tools</artifactId>
         </dependency>
-
         <dependency>
             <groupId>opensymphony</groupId>
             <artifactId>sitemesh</artifactId>
         </dependency>
-
         <dependency>
             <groupId>uk.ltd.getahead</groupId>
             <artifactId>dwr</artifactId>
         </dependency>
-
         <dependency>
             <groupId>net.sourceforge.jwebunit</groupId>
             <artifactId>jwebunit-core</artifactId>
             <version>1.4.1</version>
             <scope>test</scope>
         </dependency>
-
         <dependency>
             <groupId>commons-httpclient</groupId>
             <artifactId>commons-httpclient</artifactId>
             <version>3.1</version>
             <scope>test</scope>
         </dependency>
-
         <dependency>
             <groupId>net.sourceforge.jwebunit</groupId>
             <artifactId>jwebunit-htmlunit-plugin</artifactId>
@@ -201,7 +193,6 @@
             <version>3.1.0</version>
             <scope>test</scope>
         </dependency>
-
         <dependency>
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-core</artifactId>
@@ -246,7 +237,6 @@
                     </webAppConfig>
                 </configuration>
             </plugin>
-
             <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
                 <configuration>
@@ -257,7 +247,6 @@
                 </configuration>
             </plugin>
         </plugins>
-
         <resources>
             <!-- Include resources under src/main/java in WEB-INF/classes -->
             <resource>
@@ -270,9 +259,10 @@
                 </includes>
             </resource>
         </resources>
-
     </build>
+
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
+
 </project>