Configure maven using command prompt

Maven is project management and comprehension tool. It provides to developer to complete project building life cycle management. We can setup the maven project in very short time.

There is no need to mention each and every detail in configuration file; Maven has default behavior for projects. When we creates a maven project so it creates default project structure where we have to placed files according and there is no need to define in maven configuration file pom.xml.

Default Directory Structure

Source Code:  ${baseDir}/src/main/java

Resources: ${baseDir}/src/main/ resources

Tests: ${baseDir}/target/classes

Compiled Byte Code: ${baseDir}/src/test

Distributable JAR: ${baseDir}/target

Install Maven

Download latest apache-maven and unzip the file and maven is java based tool, it should be installed on your environment and JDK should be 1.5 or above.

Set the Environment Variable:

MAVEN_HOME: YOUR_PATH\apache-maven-3.1.0

PATH: %MAVEN_HOME%\bin;

Run the below command from command Prompt to check maven installation

mvn –version 

It should show the maven version along with java home, java version etc. as mentioned below

Apache Maven 3.1.0 (893ca28a1da9d5f51ac03827af98bb730128f9f2; 2013-06-28 07:45:32+0530)

Maven home: C:\personal\software\apache-maven-3.1.0\bin\..

Java version: 1.7.0_60-ea, vendor: Oracle Corporation

Java home: C:\Program Files\Java\jdk1.7.0_60\jre

Default locale: en_US, platform encoding: Cp1252

OS name: "windows 7", version: "6.1", arch: "x86", family: "windows"

  

Create Project Using Maven

Run the below script from command prompt

mvn archetype:generate -DgroupId=com.jigarnagar.app -DartifactId=mysample-calculate -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

 

It will take time while running first maven project on your system because maven is going to downloading most recent artifact into your local repository.

After getting a build successful message, you will notice that generate goal created a directory with the same name given as the artifactId.

Import a project using Eclipse:

Right click on project explore – import – existing maven project – select – Next

Browse the project from ROOT directory and Next, Finish

 

 

It creates a maven project and project structure will look like that

 

Maven Pom.xml

Project Object Modal – it is core file of maven project configuration which contains majority of information require building the project in just a way as we want.

It is XML file and always resides in base directory of the project.

<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/maven-v4_0_0.xsd">

  <modelVersion>4.0.0</modelVersion>

  <groupId>com.jigarnagar.app</groupId>

  <artifactId>mysample-calculate</artifactId>

  <packaging>jar</packaging>

  <version>1.0-SNAPSHOT</version>

  <name>mysample-calculate</name>

  <url>http://maven.apache.org</url>

  <dependencies>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>3.8.1</version>

      <scope>test</scope>

    </dependency>

  </dependencies>

</project>

 

POM also contains goals and plugin. All pom files require the project element and three mandatory fields: group id, artifact id and version. Maven local repository project notation will be group id:artifact id:version.

Group id	Project’s group id It is unique example: com.jigarnagar.actions
Artifact id	Project id Generally Name of the project
Version	Project version It is used to separate version with repository

 Maven Build Life Cycle

It defines the order in which goals are to be executed. Maven build life cycle consists of following sequence of phases (phase represent a stage in life cycle).

Prepare- resource	Copy resource
Compile	Compile source code
Package	bundle compile source code into JAR/WAR As defined in pom.xml file
Install	Install the package into local or remote repository

Default (Build) life cycle

Life cycle phase	Description
Validate	Validate project, all information available to complete the build process
Initialize	Initialize the build stage
Generate-sources	Generate any source code to be included in compilation stage
Process- sources	Process source code, example filter any value
Generate-resources	Generate resource to be included into package
Process-resources	Copy & process resource in destination directory ready for package phase
Compile	Compile source code
Process-classes	Post process the generated files from compilation
Package	bundle compile source code into JAR/WAR As defined in pom.xml file
Install	Install the package into local or remote repository