一、Maven多模块项目Maven多模块项目,适用于一些比较大的项目，通过合理的模块拆分，实现代码的复用，便于维护和管理。

尤其是一些开源框架，也是采用多模块的方式，提供插件集成，用户可以根据需要配置指定的模块。

项目结构如下：test-hd-parent (父级)---pom.xml---test-hd-api (第三方接口层)----pom.xml---test-hd-foundation (基础工具层)----pom.xml---test-hd-resource(资源层)----pom.xml---test-hd-service (逻辑业务层)----pom.xml---test-hd-modules (web层)----pom.xml---test-hd-www (web模块1)----pom.xml---test-hd-admin (web模块2)----pom.xml二、创建一个父maven工程新建一个maven项目，选择存储位置，并选择创建一个简单的maven工程●输入Group Id、Artifact Id、Packaging，packaging选择pom包●生成父工程，pom.xml如下●删除工程中的src 目录三、创建子模块右击父工程名---》New---》Project，然后选择新建一个maven module工程设置子工程名以及父工程，再设置快速创建模式得到子工程（test-hd-api，第三方接口层），设置编译的jdk∙同理设置，子模块：test-hd-foundation(基础工具层)、test-hd-resource(资源层) 、test-hd-service(逻辑业务层)∙新建test-hd-modules (web层)，选择创建一个a simple project，输入Group Id、Artifact Id、Packaging，packaging选择pom包四、创建web子模块∙web子模块在建在test-hd-modules (web层)里面，右击test-hd-modules 工程名---》New---》Project，然后选择新建一个maven module工程，设置子工程名以及父工程，选择新建web项目∙配置maven web项目，参照：【Maven】Eclipse 使用Maven创建Java Web项目∙同理可以配置其他的web子模块test-hd-admin(web模块2)五、配置个模块的依赖在parent项目pom.xml中建立依赖管理（dependencyManagement）<project xmlns="/POM/4.0.0" xmlns:xsi="/2001/XMLSchema-instance"xsi:schemaLocation="/POM/4.0.0/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.hd</groupId><artifactId>test-hd-parent</artifactId><version>0.0.1-SNAPSHOT</version><packaging>pom</packaging><modules><module>test-hd-api</module><module>test-hd-service</module><module>test-hd-resource</module><module>test-hd-foundation</module><module>test-hd-modules</module></modules><!-- maven依赖--><dependencyManagement><dependencies><!-- hd --><dependency><groupId>com.hd</groupId><artifactId>test-hd-api</artifactId><version>0.0.1-SNAPSHOT</version></dependency><dependency><groupId>com.hd</groupId><artifactId>test-hd-service</artifactId><version>0.0.1-SNAPSHOT</version></dependency><dependency><groupId>com.hd</groupId><artifactId>test-hd-resource</artifactId><version>0.0.1-SNAPSHOT</version></dependency><dependency><groupId>com.hd</groupId><artifactId>test-hd-foundation</artifactId><version>0.0.1-SNAPSHOT</version></dependency><!-- Servlet --><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.0.1</version><scope>provided</scope></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.2</version><scope>provided</scope></dependency><!-- jstl --><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><dependency><groupId>taglibs</groupId><artifactId>standard</artifactId><version>1.1.2</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>3.8.1</version><scope>test</scope></dependency></dependencies></dependencyManagement></project>test-hd-foundation中的依赖<?xml version="1.0"?><projectxsi:schemaLocation="/POM/4.0.0 /xsd/maven-4.0.0.xsd"xmlns="/POM/4.0.0"xmlns:xsi="/2001/XMLSchema-instance"> <modelVersion>4.0.0</modelVersion><parent><groupId>com.hd</groupId><artifactId>test-hd-parent</artifactId><version>0.0.1-SNAPSHOT</version></parent><artifactId>test-hd-foundation</artifactId><dependencies><!-- servlet --><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId></dependency><dependency><groupId>taglibs</groupId><artifactId>standard</artifactId></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId></dependency></dependencies><build><plugins><!-- define the project compile level --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>2.3.2</version><configuration><source>1.7</source><target>1.7</target></configuration></plugin></plugins></build></project>test-hd-api中的依赖关系<?xml version="1.0"?><projectxsi:schemaLocation="/POM/4.0.0 /xsd/maven-4.0.0.xsd"xmlns="/POM/4.0.0"xmlns:xsi="/2001/XMLSchema-instance"> <modelVersion>4.0.0</modelVersion><parent><groupId>com.hd</groupId><artifactId>test-hd-parent</artifactId><version>0.0.1-SNAPSHOT</version></parent><artifactId>test-hd-api</artifactId><dependencies><dependency><groupId>com.hd</groupId><artifactId>test-hd-foundation</artifactId> </dependency><!-- servlet --><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId></dependency><dependency><groupId>taglibs</groupId><artifactId>standard</artifactId></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId></dependency></dependencies><build><plugins><!-- define the project compile level --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>2.3.2</version><configuration><source>1.7</source><target>1.7</target></configuration></plugin></plugins><finalName>test-hd-api</finalName></build></project>test-hd-resource中的依赖关系<?xml version="1.0"?><projectxsi:schemaLocation="/POM/4.0.0 /xsd/maven-4.0.0.xsd"xmlns="/POM/4.0.0"xmlns:xsi="/2001/XMLSchema-instance"> <modelVersion>4.0.0</modelVersion><parent><groupId>com.hd</groupId><artifactId>test-hd-parent</artifactId><version>0.0.1-SNAPSHOT</version></parent><artifactId>test-hd-resource</artifactId><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId></dependency></dependencies><build><plugins><!-- define the project compile level --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>2.3.2</version><configuration><source>1.7</source><target>1.7</target></configuration></plugin></plugins></build></project>test-hd-service中的依赖关系<?xml version="1.0"?><projectxsi:schemaLocation="/POM/4.0.0 /xsd/maven-4.0.0.xsd"xmlns="/POM/4.0.0"xmlns:xsi="/2001/XMLSchema-instance"> <modelVersion>4.0.0</modelVersion><parent><groupId>com.hd</groupId><artifactId>test-hd-parent</artifactId><version>0.0.1-SNAPSHOT</version></parent><artifactId>test-hd-service</artifactId><dependencies><dependency><groupId>com.hd</groupId><artifactId>test-hd-foundation</artifactId></dependency><dependency><groupId>com.hd</groupId><artifactId>test-hd-api</artifactId></dependency><!-- servlet --><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId></dependency><dependency><groupId>taglibs</groupId><artifactId>standard</artifactId></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId></dependency></dependencies><build><plugins><!-- define the project compile level --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>2.3.2</version><configuration><source>1.7</source><target>1.7</target></configuration></plugin></plugins><finalName>test-hd-service</finalName></build></project>test-hd-module中的依赖关系<?xml version="1.0" encoding="UTF-8"?><project xmlns="/POM/4.0.0" xmlns:xsi="/2001/XMLSchema-instance"xsi:schemaLocation="/POM/4.0.0/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>com.hd</groupId><artifactId>test-hd-parent</artifactId><version>0.0.1-SNAPSHOT</version></parent><artifactId>test-hd-modules</artifactId><packaging>pom</packaging><modules><module>test-hd-www</module><module>test-hd-admin</module></modules><dependencies><dependency><groupId>com.hd</groupId><artifactId>test-hd-foundation</artifactId> </dependency><dependency><groupId>com.hd</groupId><artifactId>test-hd-service</artifactId> </dependency><dependency><groupId>com.hd</groupId><artifactId>test-hd-api</artifactId></dependency><dependency><groupId>com.hd</groupId><artifactId>test-hd-resource</artifactId> </dependency><!-- servlet --><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId></dependency><dependency><groupId>taglibs</groupId><artifactId>standard</artifactId></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId></dependency></dependencies></project>∙test-hd-www中的依赖关系<?xml version="1.0"?><projectxsi:schemaLocation="/POM/4.0.0/xsd/maven-4.0.0.xsd"xmlns="/POM/4.0.0"xmlns:xsi="/2001/XMLSchema-instance"><modelVersion>4.0.0</modelVersion><parent><groupId>com.hd</groupId><artifactId>test-hd-modules</artifactId><version>0.0.1-SNAPSHOT</version></parent><artifactId>test-hd-www</artifactId><packaging>war</packaging><build><plugins><!-- define the project compile level --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>2.3.2</version><configuration><source>1.7</source><target>1.7</target></configuration></plugin></plugins><finalName>test-hd-www</finalName></build></project>∙最后使用maven-update整个工程，右击父工程名--》Maven--》Update Project六、打包和发布∙打包，右击父工程名test-hd-parent---->Run As--->Maven Install∙打包web子工程，右击工程名test-hd-www--->Run As ---> Maven Build...---> Goals: clean package--->Run∙右击工程名test-hd-www，进行刷新，找到war包，放到tomcat的webapps 中，启动tomcat，即可访问工程http://localhost:8080/test-hd-www∙可以去tomcat下面webapps》test-hd-www》WEB-INF》lib中，看到引用的jar包。