Example pom.xml that runs Liferay Portal 6.1.2 on Embedded Tomcat via tomcat7-maven-plugin.

embedded-liferay-tomcat7-run-pom.xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<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>ray.demo</groupId>
		<artifactId>ray-demo</artifactId>
		<version>0.1.0-SNAPSHOT</version>
		<relativePath>../</relativePath>
	</parent>
	<artifactId>ray-demo-server</artifactId>
	<packaging>pom</packaging>
	<name>Ray Demo Server</name>
	<properties />

	<build>
		<pluginManagement>
			<plugins>
				<plugin>
					<groupId>org.apache.tomcat.maven</groupId>
					<artifactId>tomcat7-maven-plugin</artifactId>
					<version>2.1</version>
					<configuration>
						<webapps>
							<webapp>
								<groupId>com.liferay.portal</groupId>
								<artifactId>portal-web</artifactId>
								<version>6.1.2</version>
								<type>war</type>
								<asWebapp>true</asWebapp>
								<contextPath>/</contextPath>
							</webapp>
						</webapps>
					</configuration>
					<dependencies>
						<dependency>
							<groupId>com.liferay.portal</groupId>
							<artifactId>portal-service</artifactId>
							<version>6.1.2</version>
						</dependency>
						<dependency>
							<groupId>javax.servlet</groupId>
							<artifactId>javax.servlet-api</artifactId>
							<version>3.0.1</version>
						</dependency>
						<dependency>
							<groupId>javax.transaction</groupId>
							<artifactId>jta</artifactId>
							<version>1.1</version>
						</dependency>
						<dependency>
							<groupId>org.eclipse.persistence</groupId>
							<artifactId>javax.persistence</artifactId>
							<version>2.0.0</version>
						</dependency>
						<dependency>
							<groupId>javax.servlet.jsp</groupId>
							<artifactId>jsp-api</artifactId>
							<version>2.1</version>
						</dependency>
						<dependency>
							<groupId>javax.portlet</groupId>
							<artifactId>portlet-api</artifactId>
							<version>2.0</version>
						</dependency>
						<dependency>
							<groupId>org.hsqldb</groupId>
							<artifactId>hsqldb</artifactId>
							<version>2.3.0</version>
						</dependency>
						<dependency>
							<groupId>com.liferay.portal</groupId>
							<artifactId>util-bridges</artifactId>
							<version>6.1.2</version>
							<scope>provided</scope>
						</dependency>
						<dependency>
							<groupId>com.liferay.portal</groupId>
							<artifactId>util-taglib</artifactId>
							<version>6.1.2</version>
							<scope>provided</scope>
						</dependency>
						<dependency>
							<groupId>com.liferay.portal</groupId>
							<artifactId>util-java</artifactId>
							<version>6.1.2</version>
							<scope>provided</scope>
						</dependency>
						<dependency>
							<groupId>javax.mail</groupId>
							<artifactId>mail</artifactId>
							<version>1.4</version>
						</dependency>
						<dependency>
							<groupId>javax.el</groupId>
							<artifactId>el-api</artifactId>
							<version>2.2</version>
						</dependency>
						<dependency>
							<groupId>org.glassfish.web</groupId>
							<artifactId>el-impl</artifactId>
							<version>2.2</version>
						</dependency>
					</dependencies>
				</plugin>
			</plugins>
		</pluginManagement>
	</build>
</project>