为什么maven配置完Tomcat且运行之后页面内容没有显示出来？

1、如何在maven项目中配置一个webapp项目？

首先新建一个maven项目

项目目录

<?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>

    <parent>
        <groupId>org.example</groupId>
        <artifactId>doing-parent</artifactId>
        <version>1.0-SNAPSHOT</version>
        <relativePath>../../pom.xml</relativePath>
    </parent>

    <artifactId>doing-manager-controller</artifactId>
    <packaging>war</packaging>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.example</groupId>
            <artifactId>doing-manager-service</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>

    </dependencies>

    <build>
        <finalName>MavenDemo02</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <port>8082</port> <!-- 访问端口-->
                    <path>/</path> <!-- 访问路径-->
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

配置项目Artifact和webapp

我是在这里配置出现错误：