临海观潮

Java/J2EE

Mysn is created as a mutiple module project. It is devided to mysn-model-core,mysn-dao-core,mysn-service-core,and mysn-web-core module.This article will show you how to create a multiple module project with maven and eclipse.

System environment

Create the mysn project

Set up a new eclipse workspace called mysn. I set the newly created workspace to "F:\myfile\mysn".

add the M2_REPO classpath by executing the following command:

mvn -Declipse.workspace=F:\myfile\mysn eclipse:add-maven-repo

Open the command line shell and change to the newly created workspace directory.
Create a new maven project using the archetype plugin.Execute the following command in command line shell:
```
mvn archetype:create -DgroupId=cn.org.mysn -DartifactId=mysn
```
Create a new simple project mysn inside the mysn workspace with eclipse (From the menu bar, select File >New >Project. Select Simple >Project). Eclipse will create a simple .project-file for your mysn project and you should be able to see the pom.xml-file.
Delete the src-folder and open the pom.xml-file to change the packaging of your parent project to pom
```
<packaging>pom</packaging>
```

Inside the workspace directory and create some modules.

cd mysn
mvn archetype:create -DgroupId=cn.org.mysn.model.core -DartifactId=mysn-model-core
mvn archetype:create -DgroupId=cn.org.mysn.dao.core -DartifactId=mysn-dao-core
mvn archetype:create -DgroupId=cn.org.mysn.service.core -DartifactId=mysn-service-core
mvn archetype:create -DgroupId=cn.org.mysn.web.core -DartifactId=mysn-web-core 
   	     	     -DarchetypeArtifactId=maven-archetype-webapp

Note: the mysn-web-core module is created as a webapp project.

Add the newly created modules to your parent pom.

<modules>
    <module>../mysn-model-core</module>
    <module>../mysn-dao-core</module>
    <module>../mysn-service-core</module>
    <module>../mysn-web-core</module>
</modules>

Add the parent to the POMs of the new modules:

<parent>
    <groupId>cn.org.mysn</groupId>
    <artifactId>mysn</artifactId>
    <version>1.0-SNAPSHOT</version>
</parent>

Add dependency from module1 to the mysn-dao-core:

<dependency>
	<groupId>cn.org.mysn.model.core</groupId>
	<artifactId>mysn-model-core</artifactId>
	<version>1.0-SNAPSHOT</version>
</dependency>

Add dependency from module1 to the mysn-service-core:

<dependency>
	<groupId>cn.org.mysn.dao.core</groupId>
	<artifactId>mysn-dao-core</artifactId>
	<version>1.0-SNAPSHOT</version>
</dependency>

Add dependency from module1 to the mysn-web-core:

<dependency>
	<groupId>cn.org.mysn.service.core</groupId>
	<artifactId>mysn-service-core</artifactId>
	<version>1.0-SNAPSHOT</version>
</dependency>

Install the project in your local repository and generate the eclipse files:

mvn install
mvn eclipse:eclipse

Open the command line shell and change to the mysn-web-core module directory.generate the eclipse file for mysn-web-core module.
```
mvn -Dwtpversion=1.0 eclipse:eclipse 
```