maven创建多模块项目——命令行方式

maven创建多模块项目——命令行方式

如题，下面上货。
之所以使用多模块项目是为了扩展和重用时的方便。

1、首先创建一个普通的maven项目：
mvn archetype:generate -DarchetypeCatalog=internal
2、创建完成后，进入到项目文件夹中，修改pom文件

<groupId>com.xueyou</groupId>
<artifactId>mutilModuleParent</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>

3、在文件中执行命令
mvn package

4、在文件夹内在创建一个项目
mvn archetype:generate -DarchetypeCatalog=internal

<groupId>com.xueyou.mutilmodulecore</groupId>
<artifactId>mutilmodule-core</artifactId>
<version>1.0-SNAPSHOT</version>
<name>mutilmodule-core</name>

5、进入mutimodule-core文件夹下执行命令:
mvn package

6、回到上层文件夹，创建一个项目
mvn archetype:generate -DarchetypeCatalog=internal

<groupId>com.xueyou.mutilmoduleextension</groupId>
<artifactId>mutilmodule-extension</artifactId>
<version>1.0-SNAPSHOT</version>
<name>mutilmodule-extension</name>

7、进入mutilmodule-extension文件夹中，执行命令：
mvn package

8、使用idea打开项目。
效果如下图所示。



9、删除最外层的src文件夹



10、修改最外层的pom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.xueyou</groupId>
<artifactId>mutilModuleParent</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>

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

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<junit.version>3.8.1</junit.version>
</properties>

<dependencyManagement>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
</dependencyManagement>
<modules>
<module>mutilmodule-core</module>
<module>mutilmodule-extension</module>
</modules>
</project>

这里在dependencies的外层添加了dependencyManagement。添加之后在子pom中需要jar包的版本就都根据父pom中的版本来。

下面是两个子pom

<?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.xueyou</groupId>
<artifactId>mutilModuleParent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<groupId>com.xueyou.mutilmodulecore</groupId>
<artifactId>mutilmodule-core</artifactId>
<version>1.0-SNAPSHOT</version>
<name>mutilmodule-core</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>
<scope>test</scope>
</dependency>
</dependencies>
</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>
<groupId>com.xueyou</groupId>
<artifactId>mutilModuleParent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<groupId>com.xueyou.mutilmoduleextension</groupId>
<artifactId>mutilmodule-extension</artifactId>
<version>1.0-SNAPSHOT</version>
<name>mutilmodule-extension</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>
<scope>test</scope>
</dependency>
</dependencies>
</project>

这时需要注意的是如何判断搭建的多模块maven项目成功了？通过右边的maven属性来确定。



这里能够清晰的看出模块和项目之间的关系。

11、打包问题。
对于多模块项目来说，只需要在父层次上进行打包操作，对应的子模块中就能够自动打包了。好下面看一下如何配置子模块的打包（其实与maven单个项目的打包配置相同）。

<?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.xueyou</groupId>
<artifactId>mutilModuleParent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<groupId>com.xueyou.mutilmodulecore</groupId>
<artifactId>mutilmodule-core</artifactId>
<version>1.0-SNAPSHOT</version>
<name>mutilmodule-core</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>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>utf-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.xueyou.mutilmodulecore.App</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</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>
<groupId>com.xueyou</groupId>
<artifactId>mutilModuleParent</artifactId>
<version>1.0-SNAPSHOT</version>
</parent>
<groupId>com.xueyou.mutilmoduleextension</groupId>
<artifactId>mutilmodule-extension</artifactId>
<version>1.0-SNAPSHOT</version>
<name>mutilmodule-extension</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>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>utf-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<version>3.0.0</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
<configuration>
<transformers>
<transformer
implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>com.xueyou.mutilmoduleextension.App</mainClass>
</transformer>
</transformers>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

这样之后我们在最外层pom所在文件夹中执行命令：
mvn package.



分别执行jar包。





好，这样就能愉快的使用多模块的maven项目了。

后记：
如果需要上传私仓，那么需要在最外层的pom文件中添加如下内容：

<distributionManagement>
<repository>
<id>nexus</id>
<name>Releases</name>
<url>http://192.168.0.120:8081/repository/nexus-releases</url>
</repository>
<snapshotRepository>
<id>nexus</id>
<name>Snapshot</name>
<url>http://192.168.0.120:8081/repository/nexus-snapshots</url>
</snapshotRepository>
</distributionManagement>

这里的私仓地址需要写成你配置的私仓地址。