Eclipse下使用maven搭建多模塊項目

暫時將項目分爲如下幾層：

domain（域模型層）、dao（數據庫訪問層）、service（業務邏輯層）、web（表現層），有需要再另行添加（如common等）；

目錄結構：

一、app

該層爲父層，管理其它模塊層。

1.1 創建Maven Project

1.2 選擇maven-archetype-quickstart

1.3 刪除src文件夾，修改pom.xml文件，將<packaging>jar</packaging>修改爲<packaging>pom</packaging>，pom表示它是一個被繼承的模塊

修改之後的配置文件：

<?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>

  <groupId>com.bdong</groupId>
  <artifactId>app</artifactId>
  <version>0.0.1-SNAPSHOT</version>

  <name>app</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
  
  <span style="color:#ff0000;"><strong><packaging>pom</packaging></strong></span>
  
  <modules>
    <module>app-domain</module>
    <module>app-dao</module>
    <module>app-service</module>
    <module>app-web</module>
  </modules>
</project>

二、app-domain

2.1 創建Maven Module

2.2 選擇maven-archetype-quickstart

2.3 修改app-domain目錄中的pom.xml文件，把<groupId>com.bdong</groupId>和<version>0.0.1-SNAPSHOT</version>去掉，加上<packaging>jar</packaging>，groupId和version會繼承app中的groupId和version，packaging設置打包方式爲jar

修改後的配置文件：

<?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.bdong</groupId>
    <artifactId>app</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  
  <artifactId>app-domain</artifactId>
  <strong><span style="color:#ff0000;"><packaging>jar</packaging></span></strong>
  
  <name>app-domain</name>
  <url>http://maven.apache.org</url>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project><strong>
</strong>

三、app-dao

3.1 創建Maven Module

3.2 選擇maven-archetype-quickstart

3.3 修改app-dao目錄中的pom.xml文件，，把<groupId>com.bdong</groupId>和<version>0.0.1-SNAPSHOT</version>去掉，加上<packaging>jar</packaging>，因爲groupId和version會繼承app中的groupId和version，packaging設置打包方式爲jar，同時添加對app-domain模塊的依賴

修改後的配置文件：

<?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.bdong</groupId>
    <artifactId>app</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  
  <artifactId>app-dao</artifactId>
  <packaging>jar</packaging>
  
  <name>app-dao</name>
  <url>http://maven.apache.org</url>
  
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  
  <dependencies>
  	<!--依賴app-domain模塊-->
  	<dependency>
		<groupId>com.bdong</groupId>
		<artifactId>app-domain</artifactId>
		<version>${project.version}</version>
	</dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
  
</project>

四、app-service

4.1 創建Maven Module

4.2 選擇maven-archetype-quickstart

4.3  修改app-service目錄中的pom.xml文件，，把<groupId>com.bdong</groupId>和<version>0.0.1-SNAPSHOT</version>去掉，加上<packaging>jar</packaging>，packaging設置打包方式爲jar，同時添加對app-dao模塊的依賴，app-service依賴app-dao和app-domain，但是隻需添加app-dao的依賴即可，因爲app-dao已經依賴了app-domain。

修改後的配置文件：

<?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.bdong</groupId>
    <artifactId>app</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  
  <artifactId>app-service</artifactId>
  <packaging>jar</packaging>
  
  <name>app-service</name>
  <url>http://maven.apache.org</url>
  
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>
  
  <dependencies>
  	<dependency>
		<groupId>com.bdong</groupId>
		<artifactId>app-dao</artifactId>
		<version>${project.version}</version>
	</dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

五、app-web

5.1 創建Maven Module

5.2 選擇maven-archetype-webapp

5.3 修改app-web目錄中的pom.xml文件，，把<groupId>com.bdong</groupId>和<version>0.0.1-SNAPSHOT</version>去掉，修改打包方式爲<packaging>war</packaging>，添加對app-service模塊的依賴

修改後的配置文件：

<?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.bdong</groupId>
    <artifactId>app</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>
  
  <artifactId>app-web</artifactId>
 <strong> <span style="color:#ff0000;"><packaging>war</packaging></span></strong>
  
  <name>app-web Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
  	<dependency>
		<groupId>com.bdong</groupId>
		<artifactId>app-service</artifactId>
		<version>${project.version}</version>
	</dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
  <build>
    <finalName>app-web</finalName>
  </build>
</project>

六，編譯

控制檯打印信息：

七、運行

7.1 添加app-web到tomcat中

7.2 運行tomcat，然後在瀏覽器中訪問:localhost:8080/app-web

最終，目錄結構爲：

項目github地址：https://github.com/baidong0228/Study/tree/master/app

使用命令搭建多模塊可參考：http://www.cnblogs.com/xdp-gacl/p/4242221.html