Develop Reference

Plugin 'org.apache.maven.plugins:maven-compiler-plugin:' not found

I have a pom.xml file where I get this message Plugin 'org.apache.maven.plugins:maven-compiler-plugin:' not found. I recently started using Maven and been looking around without any answer
<?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">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>Declarations</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>5.9.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
</dependencies>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.2</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>19</source>
<target>19</target>
</configuration>
</plugin>
</plugins>
</build>
</project>
My issue is with
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>19</source>
<target>19</target>
</configuration>
</plugin>
maven-compiler-plugin says Plugin 'org.apache.maven.plugins:maven-compiler-plugin:' not found.

Dependency 'javax:javaee-api:6.0' not found

I'm a computer science student and I'm currently making my first steps in using JEE. To retry an example of my study material, I tried to build a web-application using IntelliJ Community. As there is no offical possibility to do so with the community version, I tried to use maven following this tutorial: https://www.shortn0tes.com/2017/01/tutorial-intellij-idea-community.html
Now I get an error about the dependency injection of javax in the pom.xml:
Dependency 'javax:javaee-api:6.0' not found
Is there anything that I need to add/configure in my IntelliJ IDE? I know that the tutorial is maybe not super modern anymore, but I'd just like to follow the example of my university material.
Thank you very much!
Here my pom.xml:
<?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">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>test</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>test Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>6.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>test</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<port>8888</port>
<path>/</path>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>

'build.plugins.plugin.version' for org.apache.maven.plugins:maven-surefire-plugin is missing

Trying to get familiar with maven and taking an online course and am stuck .... appreciate any help provided.
I'm running the Site phase and although it completes and I'm able to actually view index.html in a browser I am getting a lot of errors along the way, specifically:
'build.plugins.plugin.version' for org.apache.maven.plugins:maven-surefire-plugin is missing
Have no idea why it's generating this error. As you can see below I have the version in both dependency and plugins. And I tried all I can find on sites. Why does it think the version is missing? Any ideas how to resolve? thanks in advance for any help!
<?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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.dp</groupId>
<artifactId>TestNG77</artifactId>
<version>1.0-SNAPSHOT</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>11</java.version>
<maven.compiler.source>${java.version}</maven.compiler.source>
<maven.compiler.target>${java.version}</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.8.1</version>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>7.0.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.2</version>
</dependency>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-report-plugin</artifactId>
<version>2.22.2</version>
</dependency>
</dependencies>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.2</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-site-plugin</artifactId>
<version>3.7.1</version>
</plugin>
</plugins>
</pluginManagement>
</build>
<reporting>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-report-plugin</artifactId>
<version>2.22.2</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>3.0.0</version>
</plugin>
</plugins>
</reporting>

Removing the following 2 dependencies from <dependencies> should fix all the errors. These 2 are maven plugins and not required in <dependencies> section.
When you include these 2 as dependencies, maven-project-info-reports-plugin is trying to generate dependency report for these 2 plugins and failing. Hence you are seeing those errors.
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.2</version>
</dependency>
<dependency>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-report-plugin</artifactId>
<version>2.22.2</version>
</dependency>

Executing spring-boot:run when not inheriting from spring-boot-starter-parent

I have a spring-boot maven project, which cannot have spring-boot-starter-parent as a parent due to organizational restrictions. I came across the following answer which helped me with compiling, testing and packaging an executable jar.
However when I try to execute spring-boot:run i receive the following error:
No plugin found for prefix 'spring-boot' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories
The following comment in the answer seems to point to away to fix this:
The code snippet above is sufficient to get the dependency management features. If you want plugins (like spring-boot:run) you need to confute those separately. You can copy paste from the Boot parent if you want
However after adding the proposed section to my pom file I still get the same error. My pom files can be found below:
Parent pom.xml:
<?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">
<modelVersion>4.0.0</modelVersion>
<groupId>group.id.foo</groupId>
<artifactId>foo_artifact</artifactId>
<version>version_01</version>
<packaging>pom</packaging>
<name>${project.artifactId}</name>
<prerequisites>
<maven>2.2.1</maven>
</prerequisites>
<modules>
<module>module_01</module>
</modules>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<!--compilerArgument>-Dfile.encoding=ISO-8859-1</compilerArgument-->
<encoding>${project.build.sourceEncoding}</encoding>
<sourceEncoding>${project.build.sourceEncoding}</sourceEncoding>
</configuration>
<executions>
<execution>
<id>default</id>
<phase>compile</phase>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-release-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.4</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
Child pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<properties>
<java.version>1.8</java.version>
<main.basedir>${basedir}/../..</main.basedir>
<ing.continuous-delivery.version>00.04.04</ing.continuous-delivery.version>
<maven.assembly.version>2.3</maven.assembly.version>
</properties>
<parent>
<groupId>group.id.foo</groupId>
<artifactId>foo_artifact</artifactId>
<version>version_01</version>
</parent>
<groupId>group.id.foo</groupId>
<artifactId>${project.parent.artifactId}_app</artifactId>
<version>${project.parent.version}</version>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>1.5.3.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- tag::spring -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
<version>1.5.3.RELEASE</version>
</dependency>
<!-- end::spring -->
<!-- tag::web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>1.5.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-hateoas</artifactId>
<version>1.5.3.RELEASE</version>
</dependency>
<!-- end::web -->
</dependencies>
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>repackage</goal>
</goals>
</execution>
</executions>
<configuration>
<mainClass>${start-class}</mainClass>
</configuration>
</plugin>
</plugins>
</pluginManagement>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>1.5.3.RELEASE</version>
</plugin>
</plugins>
</build>
</project>
Thanks!

Android Maven Unexpected Top-Level Exception

I'm getting the error which I shared below. It's related to maven (imho) and I know there is something wrong with my pom.xml but nothing found. I searched for all the same topics and the latest point what I reached is something should be excluded from some artifact because that something tries to add itself multiple times as error says. Btw it can be compiled without any problem through maven however I get this error when I want to run "package" on it.
[INFO] UNEXPECTED TOP-LEVEL EXCEPTION:
[INFO] java.lang.IllegalArgumentException: already added: Lorg/codehaus/classwor
lds/BytesURLConnection;
[INFO] at com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java:12
2)
<?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">
<modelVersion>4.0.0</modelVersion>
<groupId>com.a</groupId>
<artifactId>a</artifactId>
<version>1.0.0</version>
<packaging>apk</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<android.plugin.version>3.6.0</android.plugin.version>
<platform.version>2.3.3</platform.version>
<sdk_path>D:\Android</sdk_path>
</properties>
<dependencies>
<dependency>
<groupId>com.google.android</groupId>
<artifactId>android</artifactId>
<version>${platform.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<version>3.8.0</version>
</dependency>
<dependency>
<groupId>com.j256.ormlite</groupId>
<artifactId>ormlite-android</artifactId>
<version>4.47</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<sdk>
<platform>10</platform>
<path>${sdk_path}</path>
</sdk>
<dexOptimize>false</dexOptimize>
<dex>
<preDex>false</preDex>
<preDexLibLocation>/tmp/predexedLibs</preDexLibLocation>
</dex>
</configuration>
<extensions>true</extensions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

remove below part
<dependency>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<version>3.8.0</version>
</dependency>
and insert below lines under build element
<build>
<finalName>${project.artifactId}</finalName>
<sourceDirectory>src</sourceDirectory>
the latest and correct pom.xml should be seen as below
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.holyscreen</groupId>
<artifactId>HolyScreenApp</artifactId>
<version>1.0.0</version>
<packaging>apk</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<android.plugin.version>3.6.0</android.plugin.version>
<platform.version>2.3.3</platform.version>
<sdk_path>D:\Android</sdk_path>
</properties>
<dependencies>
<dependency>
<groupId>com.google.android</groupId>
<artifactId>android</artifactId>
<version>${platform.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.j256.ormlite</groupId>
<artifactId>ormlite-android</artifactId>
<version>4.47</version>
</dependency>
</dependencies>
<build>
<finalName>${project.artifactId}</finalName>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<sdk>
<platform>10</platform>
<path>${sdk_path}</path>
</sdk>
<dexOptimize>false</dexOptimize>
<dex>
<preDex>false</preDex>
<preDexLibLocation>/tmp/predexedLibs</preDexLibLocation>
</dex>
</configuration>
<extensions>true</extensions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
</plugins>
</build>
</project>