maven构建多模块项目

介绍:一个多模块项目通过一个父POM(也称顶层POM)引用一个或多个子模块来定义.在父POM,定义一些将会被所有子模块继承的设置.build配置和dependencies都会被所有的子模块继承.在父POM定义GAV,然后定义packaging只能为pom.使用modules定义多个子模块,每个子元素module对应一个子目录,然后maven会根据这些子目录寻找pom.xml.

下面是一个例子simple-parent包含simple-java子模块(一般java项目)和simple-web子模块(一般web项目).

一.各pom.xml定义
1.simple-parent父pom:

<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>
	<groupId>com.test</groupId>
	<artifactId>simple-parent</artifactId>
	<version>1.0</version>
	<packaging>pom</packaging>
	<name>simple-parent maven</name>
	<modules>
		<module>simple-java</module>
		<module>simple-web</module>
	</modules>
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>
	<build>
		<pluginManagement>
			<plugins>
				<plugin>
					<groupId>org.apache.maven.plugins</groupId>
					<artifactId>maven-compiler-plugin</artifactId>
					<configuration>
						<source>1.7</source>
						<target>1.7</target>
					</configuration>
				</plugin>
			</plugins>
		</pluginManagement>
	</build>
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.11</version>
			<scope>test</scope>
		</dependency>
	</dependencies>
</project>

2.simple-java子模块pom:

<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.test</groupId>
		<artifactId>simple-parent</artifactId>
		<version>1.0</version>
	</parent>
	<artifactId>simple-java</artifactId>
	<version>1.0-SNAPSHOT</version>
	<packaging>jar</packaging>
	<name>simple-java maven</name>
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>
	<dependencies>
	</dependencies>
</project>

3.simple-web子模块:

<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.test</groupId>
		<artifactId>simple-parent</artifactId>
		<version>1.0</version>
	</parent>
	<artifactId>simple-web</artifactId>
	<packaging>war</packaging>
	<version>1.0-SNAPSHOT</version>
	<name>simple-web Maven</name>
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<tomcat.version>7.0.47</tomcat.version>
	</properties>
	<build>
		<pluginManagement>
			<plugins>
				<plugin>
					<groupId>org.apache.tomcat.maven</groupId>
					<artifactId>tomcat7-maven-plugin</artifactId>
					<version>2.1</version>
					<configuration>
						<server>Tomcat7</server>
						<url>http://localhost:8080/manager/text</url>
						<path>/simple-web</path>
					</configuration>
				</plugin>
			</plugins>
		</pluginManagement>
	</build>
	<dependencies>
		<dependency>
			<groupId>com.test</groupId>
			<artifactId>simple-java</artifactId>
			<version>1.0-SNAPSHOT</version>
		</dependency>
		<dependency>
			<groupId>org.apache.tomcat</groupId>
			<artifactId>tomcat-servlet-api</artifactId>
			<version>${tomcat.version}</version>
			<scope>provided</scope>
		</dependency>
	</dependencies>
</project>

4.当然,各子模块可以像一般情况下引入其它的依赖,对于所有子模块都用的依赖,可以放入父pom,也就是所谓的全局依赖

二.先在simple-parent运行mvn clean install或在eclipse的goals填clean install,将simple-java安装到本地库,再在simple-web部署才能正确发布引用依赖.

源码:http://download.youkuaiyun.com/detail/xiejx618/6957289