解决idea maven configuration plugin does not display in plugin window. Take Tomcat maven plug-in as an example

Notice where the plugins tag is located. The plugins tag of the plugin can be placed either directly under the build tag or under the pluginManagement tag

The plugins tag that exists by default when creating a Maven project is under the pluginManagement tag and the pluginManagement tag is only a declaration of the plug-in, not a loading of the plug-in

So here’s the solution: write a plugins tag next to the build tag and put the plugin tag inside

Here is the complete 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/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.example</groupId>
  <artifactId>hello_web2</artifactId>
  <version>1.0 the SNAPSHOT</version>
  <packaging>war</packaging>

  <name>hello_web2 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>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <finalName>hello_web2</finalName>
    <plugins>
      <plugin>
        <groupId>org.apache.tomcat.maven</groupId>
        <artifactId>tomcat7-maven-plugin</artifactId>
        <version>2.2</version>
        <configuration>
          <! -- Configure the port number -->
          <port>80</port>
          <! -- Configure the project path -->
          <path>/</path>
        </configuration>
      </plugin>
    </plugins>


    <pluginManagement><! -- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>

        <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>
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The specific location is shown in the following figure