Introduction and Setting up

Maven

·         Build tool

·         Project management tool

Common problems and activities

·         In managing multiple jars

·         In managing Dependencies and Versions

·         In managing Project structure

·         Used for Building, Publishing and Deployement

Download the latest maven from below URL.

http://maven.apache.org/download.cgi

In my case I have downloaded "apache-maven-3.0.5-bin.zip"

Steps to flow for installing maven

1. Extract the zip file

2. Set below Environment variables (Windows 7)

                M2_HOME = C:\java\apache-maven-3.0.5

                PATH = C:\java\apache-maven-3.0.5\bin or C:\java\apache-maven-3.0.5\bin;%PATH%

3. Go to command prompt Run-> cmd

4. check maven version using command -> mvn --version

5. Make sure your command should be on bin path eg: C:>java>apache-maven-3.0.5

6. Create directory using command -> mkdir myapp

7. Go into "myapp" direction using command -> eg: C:>java>apache-maven-3.0.5>myapp>

8. Now type "mvn archetype:generate" and enter,

   It will prompt to choose a number which is nothing but archeType(Project Type). In my case it is 264

   Now it will prompt with different version, choose latest version. In my case I have choosen 6

   It creates project with all the dependencies available in settings.xml

9. Now it asks for groupId, which is nothing but package name eg: org.yash.javajadhav

10. Now it asks for artifactId, which is nothing but Classname eg: MavenTestApp

11. Now it prompt with Snapshot version, in my case it is 1.0-SNAPSHOT - Don't type anything just press enter

12. Now it prompt with package , in my case it is org.yash.javajadhav - Don't type anything just press enter

11. Now it prompt - you want to continue - y / no - n

Now the project will be created at below path

C:\java\apache-maven-3.0.5\myapp\MavenTestApp

It contains src directory and pom.xml

src contains two directories they are

·         main which contains application.

·         test which contains test application like junit

pom.xml contains the information about the application itself and what the dependencies are

In my case it has only dependency i.e. junit

  <dependencies>

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>3.8.1</version>

      <scope>test</scope>

    </dependency>

  </dependencies>

We just need to add first entry point of dependency all remaining jars will be taken care by Maven

Compile our application using below command

mvn complie

Make sure you will be in application directory (C:\java\apache-maven-3.0.5\myapp\MavenTestApp)

Now we require packages, type below command

mvn package

It will create “MavenTestApp-1.0-SNAPSHOT.jar” in target directory

Now we have jar, lets execute it using below command.

Java -cp target/MavenTestApp-1.0-SNAPSHOT.jar org.yash.javajadhav.App

Maven gets all its knowledge from maven repository

It has two type of information they are 1.ArchetypeInfo  2.Dependency Info

Archetype Info: Has information about different types of projects you want to create, folder structure and all the required information creating a new project of that particular type

Dependency info: Has information about list of all the jars.