这里以安装tomcat依赖为例

1, 访问maven公共仓库

2,搜索tomcat

3, 右侧点击Plugin

选择：Apache Tomcat Maven Plugin :: Tomcat 7.x 

 

选择版本，这里我选择2.2

 选择maven，将<dependency>中的内容copy到pom.xml中的<build>里面

 添加完毕pom.xml如下 

<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>
    <parent>
        <groupId>com.itheima</groupId>
        <artifactId>Demo</artifactId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <artifactId>demo2</artifactId>
    <packaging>war</packaging>
    <name>demo2 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>
    </dependencies>
    <build>
        <finalName>demo2</finalName>
        <plugins><!--tomcat插件-->
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <port>80</port>
                    <path>/</path>
                    <uriEncoding>UTF-8</uriEncoding>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

点击M图标，会自动取仓库中下载tomcat的jar包 

 即安装完毕