详解使用Maven构建多模块项目(图文)

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  

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

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

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)

配置个模块的依赖

在parent项目pom.xml中建立依赖管理(dependencyManagement)

<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>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"?>

<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>

<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"?>

<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>

<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"?>

<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>

<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"?>

<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>

<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="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>

<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"?>

<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>

<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

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

 

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