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How to add spring boot actuator to WAR project

I have spring mvc application. I tried to convert it to spring boot by doing following steps.
Adding spring-boot-starter-parent parent pom
Adding relevant spring-boot-starter dependncy
Removing spring-mvc and other dependency.
Removed AbstractAnnotationConfigDispatcherServletInitializer class.
Added #ComponentScan, #EnableAutoConfiguration to root config class.
This was successful and I could see that application was working but when I added spring-boot-starter-actuator dependency and run mvn jetty:run . http://localhost:8080//actuator returns 404 response.
Can someone please tell me how I can add actuator in this case ?
<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>
<groupId>net.javaguides.springmvc</groupId>
<artifactId>springmvc-java-config-example</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>springmvc-java-config-example Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<failOnMissingWebXml>false</failOnMissingWebXml>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.13.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jdbc</artifactId>
</dependency>
<!-- Hibernate Core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.17.Final</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<!-- Hibernate Validator -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.4.1.Final</version>
</dependency>
</dependencies>
<build>
<sourceDirectory>src/main/java</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.5.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.4.8.v20171121</version>
<configuration>
<webApp>
<contextPath>/sampleno</contextPath>
</webApp>
</configuration>
</plugin>
</plugins>
</build>
</project>

your url is not correct.please check this url: [http://localhost:8080/actuator][1]

Error with Spark: NoSuchMethodError: scala.Predef$.$conforms()Lscala/Predef$$less$colon$less

I've got an application which streams Twitter posts.
It worked correctly, but after modifying the build path, I didn't manage to set it how it was before. I keep getting this error:
Exception in thread "main" java.lang.NoSuchMethodError: scala.Predef$.$conforms()Lscala/Predef$$less$colon$less;
at org.apache.spark.util.Utils$.getSystemProperties(Utils.scala:1710)
at org.apache.spark.SparkConf.loadFromSystemProperties(SparkConf.scala:73)
at org.apache.spark.SparkConf.<init>(SparkConf.scala:68)
at org.apache.spark.SparkConf.<init>(SparkConf.scala:55)
at Analytics.init(Analytics.java:20)
at KafkaTwitterProducer.main(KafkaTwitterProducer.java:162)
This is my pom.xml
<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>TwitterStreamingAnalyzer</groupId>
<artifactId>TwitterStreamingAnalyzer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.5.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.10</artifactId>
<version>0.10.2.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.twitter4j/twitter4j-core -->
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-core</artifactId>
<version>4.0.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.twitter4j/twitter4j-stream -->
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-stream</artifactId>
<version>4.0.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.twitter4j/twitter4j-async -->
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-async</artifactId>
<version>4.0.4</version>
</dependency>
</dependencies>
</project>
I already read all of the similar questions, but none of them helped me, because I tried to import the right versions of the jars, but it still doesn't work.
How can I fix this?

Looks like you are trying to use a kafka library compiled in Scala 2.10 in a Spark cluster compiled in other version (probably 2.11). Try this change in your pom.xml:
<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>TwitterStreamingAnalyzer</groupId>
<artifactId>TwitterStreamingAnalyzer</artifactId>
<version>0.0.1-SNAPSHOT</version>
<build>
<sourceDirectory>src</sourceDirectory>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.5.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.11</artifactId>
<version>0.10.2.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.twitter4j/twitter4j-core -->
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-core</artifactId>
<version>4.0.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.twitter4j/twitter4j-stream -->
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-stream</artifactId>
<version>4.0.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.twitter4j/twitter4j-async -->
<dependency>
<groupId>org.twitter4j</groupId>
<artifactId>twitter4j-async</artifactId>
<version>4.0.4</version>
</dependency>
</dependencies>
</project>

Unable to get the default Bean Validation factory error

I'm building a RESTful web service using Jersey and Hibernate, but I've encountered the following error.....
javax.servlet.ServletException: org.hibernate.HibernateException: Unable to get the default Bean Validation factory
org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:419)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:381)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:344)
org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:221)
This is my pom.xml file:
<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>
<groupId>org.asad.login</groupId>
<artifactId>login</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>login</name>
<build>
<finalName>login</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<inherited>true</inherited>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey</groupId>
<artifactId>jersey-bom</artifactId>
<version>${jersey.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<!-- use the following artifactId if you don't need servlet 2.x compatibility -->
<!-- artifactId>jersey-container-servlet</artifactId -->
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-envers</artifactId>
<version>3.6.4.Final</version>
</dependency>
<dependency>
<groupId>javax.el</groupId>
<artifactId>javax.el-api</artifactId>
<version>2.2.4</version>
<scope>provided</scope> <!-- No required in JBoss but for test -->
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>javax.el</artifactId>
<version>2.2.4</version>
<scope>provided</scope> <!-- No required in JBoss but for test -->
</dependency>
<!-- uncomment this to get JSON support
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-moxy</artifactId>
</dependency>
-->
</dependencies>
<properties>
<jersey.version>2.16</jersey.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
</project>
I can't identify the source of my error. Thanks in advance for any assistance.

Dagger 2 no classes generated

I want to try something new and use Dagger 2 as my DI framework. So I have the following pom and the "hello world" coffee maker classes (http://google.github.io/dagger/) in my projekt.
But when I do a mvn clean install no classes get generated. As far as I unterstood there should be a "Dagger_CoffeeShop" class generated. Hmmm ... what am I missing?
<modelVersion>4.0.0</modelVersion>
<groupId>kic</groupId>
<artifactId>xfoo</artifactId>
<version>0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>com.google.dagger</groupId>
<artifactId>dagger</artifactId>
<version>2.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<dependencies>
<dependency>
<groupId>com.google.dagger</groupId>
<artifactId>dagger-compiler</artifactId>
<version>2.0-SNAPSHOT</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>

For those using Gradle: Make sure you are referencing the Dagger dependencies as following:
compile 'com.google.dagger:dagger:2.0.2'
apt 'com.google.dagger:dagger-compiler:2.0.2'
And in the case if you are running into apt not supported, add
1) Into module app\build.gradle:
apply plugin: 'com.neenbedankt.android-apt'
2) Into project \build.gradle:
buildscript {
dependencies {
classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
}
}

I had the same problem, only with the release version 2.0.
In my case the following two steps solved this problem:
Adding target/generated-sources/annotations to my build path
Adding <forceJavacCompilerUse>true</forceJavacCompilerUse> to the maven compiler plugin
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<dependencies>
<dependency>
<groupId>com.google.dagger</groupId>
<artifactId>dagger-compiler</artifactId>
<version>2.0</version>
</dependency>
</dependencies>
<configuration>
<source>1.8</source>
<target>1.8</target>
<!-- workaround for https://issues.apache.org/jira/browse/MCOMPILER-202 -->
<forceJavacCompilerUse>true</forceJavacCompilerUse>
</configuration>
</plugin>
See also:
https://github.com/google/dagger/pull/103
https://issues.apache.org/jira/browse/MCOMPILER-202

This isn't the best answer. When I used the downloaded JAR files (commented out in the POM file below) mine also wasn't generating the Dagger_ files. Once I added the repository to the POM, everything was working fine.
<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.hello</groupId>
<artifactId>hellodagger</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<name>hellodagger</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<repositories>
<repository>
<id>sonatype</id>
<name>sonatype-repo</name>
<url>https://oss.sonatype.org/content/repositories/snapshots/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.dagger</groupId>
<artifactId>dagger</artifactId>
<version>2.0-SNAPSHOT</version>
<!--<scope>system</scope>-->
<!--<systemPath>${project.basedir}/dagger-2.0-20141216.223138-12.jar</systemPath>-->
</dependency>
<dependency>
<groupId>com.google.dagger</groupId>
<artifactId>dagger-compiler</artifactId>
<version>2.0-SNAPSHOT</version>
<optional>true</optional>
<!--<scope>system</scope>-->
<!--<systemPath>${project.basedir}/dagger-compiler-2.0-20141216.223201-12-jar-with-dependencies.jar</systemPath>-->
</dependency>
</dependencies>
</project>

Maven appears to be ignoring source and target in webapp

I'm getting "Generated servlet error:|try-with-resources is not supported in -source 1.5". 1.5 is maven's default according to another question on the topic, but I thought I had fixed that in my pom.xml -
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.sspo</groupId>
<artifactId>sspo-parent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<artifactId>website</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>website</name>
<properties>
<jetty.version>9.0.5.v20130815</jetty.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>${jetty.version}</version>
<dependencies>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
<version>1.6</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.26</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>com.sspso</groupId>
<artifactId>com.sspo.package1</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.sspo</groupId>
<artifactId>com.sspo.package2</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
Other packages in the project work fine with 1.7, as seen in the parent pom -
<?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.sspo</groupId>
<artifactId>sspo-parent</artifactId>
<packaging>pom</packaging>
<version>1.0-SNAPSHOT</version>
<name>sspo-parent</name>
<modules>
<module>try-with-resources-works-here</module>
<module>and-here</module>
<module>even-in-this-one</module>
<module>website</module>
</modules>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>14.0.1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.2</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.14</version>
</dependency>
</dependencies>
</project>
Ultimately, I think the question is probably "what have I done wrong that maven is ignoring the source and target specifications?" There are similar questions out there, but the ones I've seen are either not solved or suggest things that exist in my pom.
Any help would be appreciated.

Jetty is using 1.5 source and target args by default for JSP compilation. See Jetty embedded and JSP compilation to 1.7? for pointers and info on switching Jetty to use 1.7