如何使用eclipse搭建maven多module项目(构建父子项目)

<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>pdd-shop</groupId> 
<artifactId>pdd-shop</artifactId> 
<version>0.0.1-SNAPSHOT</version> 
<packaging>pom</packaging> 
<name>pdd-shop</name> 
<url>http://maven.apache.org</url> 
<properties> 
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
<junit.version>4.11</junit.version> 
<spring.version>4.0.0.RELEASE</spring.version> 
</properties> 
<build> 
<finalName>pdd-shop</finalName> 
<plugins> 
<plugin> 
<groupId>org.apache.maven.plugins</groupId> 
<artifactId>maven-compiler-plugin</artifactId> 
<version>2.3.2</version> 
<configuration> 
<source>1.6</source> 
<target>1.6</target> 
<compilerVersion>1.6</compilerVersion> 
</configuration> 
</plugin> 
<!-- jar插件 --> 
<plugin> 
<groupId>org.apache.maven.plugins</groupId> 
<artifactId>maven-jar-plugin</artifactId> 
<version>2.5</version> 
<configuration> 
<archive> 
<manifest> 
<addDefaultImplementationEntries>true</addDefaultImplementationEntries> 
<addDefaultSpecificationEntries>true</addDefaultSpecificationEntries> 
</manifest> 
</archive> 
</configuration> 
</plugin> 
</plugins> 
</build> 
<dependencies> 
<dependency> 
<groupId>junit</groupId> 
<artifactId>junit</artifactId> 
<version>${junit.version}</version> 
</dependency> 
<!-- spring framework --> 
<dependency> 
<groupId>org.springframework</groupId> 
<artifactId>spring-web</artifactId> 
<version>${spring.version}</version> 
</dependency> 
<dependency> 
<groupId>org.springframework</groupId> 
<artifactId>spring-webmvc</artifactId> 
<version>${spring.version}</version> 
</dependency> 
<dependency> 
<groupId>commons-logging</groupId> 
<artifactId>commons-logging</artifactId> 
<version>1.2</version> 
</dependency> 
</dependencies> 
<modules> 
<module>pdd-shop-application</module> 
<module>pdd-shop-appweb</module> 
<module>pdd-shop-application-impl</module> 
</modules> 
</project>

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>pdd-shop</artifactId>
<groupId>pdd-shop</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<groupId>pdd-shop</groupId>
<artifactId>pdd-shop-application</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>pdd-shop-application</name>
</project>

<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>pdd-shop</artifactId>
<groupId>pdd-shop</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<groupId>pdd-shop</groupId>
<artifactId>pdd-shop-appweb</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>pdd-shop-appweb Maven Webapp</name>
<build>
<finalName>pdd-shop-appweb</finalName>
<plugins>
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<id>copy-lib-src-webapps</id>
<phase>package</phase>
<configuration>
<tasks>
<delete dir="WebContent/WEB-INF/lib" />
<copy todir="WebContent/WEB-INF/lib">
<fileset dir="target/${artifactId}/WEB-INF/lib">
<include name="*" />
</fileset>
</copy>
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>${groupId}</groupId>
<artifactId>pdd-shop-application-impl</artifactId>
<version>${version}</version>
</dependency>
</dependencies>
</project>