In pom.xml of a maven web demo project,

  1. add servlet-api in this pom.xml;
  2. add src/main/java and src/test/java directories to make it maven;
  3. add jetty plugins for this project:
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<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>com.imooc.webdemo</groupId>
  <artifactId>webdemo</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>webdemo Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.0.1</version>
      <!-- scope: only run in compile and testing time -->
      <scope>provided</scope>
    </dependency>
  </dependencies>
  <build>
    <finalName>webdemo</finalName>
    <plugins>
      <plugin>
        <groupId>org.mortbay.jetty</groupId>
        <artifactId>jetty-maven-plugin</artifactId>
        <version>8.1.16.v20140903</version>
      </plugin>
    </plugins>
  </build>
</project>

If Run As> jetty:run gives No plugin found for prefix 'jetty' in the current project error like this: 

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[INFO] Scanning for projects...
[INFO] Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-metadata.xml
[INFO] Downloading: https://repo.maven.apache.org/maven2/org/codehaus/mojo/maven-metadata.xml
[INFO] Downloaded: https://repo.maven.apache.org/maven2/org/codehaus/mojo/maven-metadata.xml (20 KB at 1.7 KB/sec)
[INFO] Downloaded: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-metadata.xml (14 KB at 0.9 KB/sec)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 14.422 s
[INFO] Final Memory: 10M/245M
[INFO] ------------------------------------------------------------------------
[ERROR] No plugin found for prefix 'jetty' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (/Users/xialei/.m2/repository), central (https://repo.maven.apache.org/maven2)] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/NoPluginFoundForPrefixException

Add jetty in current project and in the plugin groups in setting.xml.

Edit maven default setting:

  1. installation: $M2_HOME/conf/settings.xml; (global config)
  2. user directory: ${user.home}/.m2/settings.xml; (user config)

Priority: 2 > 1.

In settings.xml, locate <pluginGroups>, addorg.mortbay.jetty`, then maven would add prefix each time service is running.

Or, use a different jetty coordinate:

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<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.4.24.v20191120</version>

Or use Apache Tomcat as server container:

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<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>