The following table lists the system requirements for installing Maven.
| Item | Requirements |
|---|---|
| JDK | Maven 3.2 requires JDK 1.6 or above Maven 3.0/3.1 requires JDK 1.5 or above |
| Memory | No minimum requirement |
| Disk | 10MB for the Maven installation itself. At least 500MB for your local Maven repository. |
| Operating System | No minimum requirement. |
Maven is a Java tool, we have to have Java installed first.
We need a Java Development Kit (JDK), the Java Runtime Environment (JRE) is not sufficient.
To verify Java Development Kit version on Windows, open Command Console and type
c:\> java -version
To verify Java Development Kit version on Linus, open Command Terminal and type
$ java -version
To verify Java Development Kit version on Mac, open Terminal and type
$ java -version
Download JDK from Oracle web site and execute the installation file.
We have to set the JAVA_HOME environment variable
to point to the JDK installation directory on your machine.
On Windows open a console window and issue the following command
set JAVA_HOME=C:\Program Files\Java\jdk1.8.0
On Linux issue the following command
export JAVA_HOME=/usr/local/jdk
On Mac use the following command
export JAVA_HOME=/your_JDK_folder
The next step is to append java and javac file location to System Path.
On Windows append the following string to the end of the system variable Path.
set PATH=C:\Jdk_Folder\bin;%PATH%
On Linux use the following command
export PATH=$PATH:$JAVA_HOME/bin/
Go to http://maven.apache.org/download.cgi to download installation file for your target system.
To extract the installation archive downloaded from previous step to the directory you wish to install Maven.
| OS | Location |
|---|---|
| Windows | C:\apache-maven |
| Linux | /usr/local/apache-maven |
| Mac | /usr/local/apache-maven |
In order to use Maven we have to set up the following three environment variables.
| Variable Name | Description |
|---|---|
| M2_HOME | Install Location. (C:\apache-maven) |
| M2 | For Maven command. |
| MAVEN_OPTS | Maven memory usage setting |
On Windows we set the environment variables as follows.
set M2_HOME=C:\apache-maven-install-path set M2=%M2_HOME%\bin set MAVEN_OPTS=-Xms256m -Xmx512m
On Linux we set the environment variables as follows.
export M2_HOME=/usr/local/apache-maven-install-path export M2=$M2_HOME/bin export MAVEN_OPTS=-Xms256m -Xmx512m
On Mac we set the environment variables as follows.
export M2_HOME=/usr/local/apache-maven-install-path export M2=$M2_HOME/bin export MAVEN_OPTS=-Xms256m -Xmx512m
In order to use Maven command line tools anywhere on your system, we have to add Maven bin directory location to system path.
On Windows append the string ;%M2% to the end of the
system variable PATH.
M2 is the variable defined in the step of
setting Maven environment variables.
On Linux we can use the following command
export PATH=$M2:$PATH
On Mac we can use the following command
export PATH=$M2:$PATH
To verify the Maven is installed we can open a console window and execute the following Maven command.
c:\Java_Dev>mvn --version Apache Maven 3.2.3 (33f8c3e1027c3ddde99d3cdebad2656a31e8fdf4; 2014-08-11T13:58:10-07:00) Maven home: C:\Java_Dev\sdk\apache-maven-3.2.3 Java version: 1.8.0_05, vendor: Oracle Corporation Java home: C:\Java_Dev\sdk\jdk\jre Default locale: en_US, platform encoding: Cp1252 OS name: "windows 7", version: "6.1", arch: "amd64", family: "dos" 'cmd' is not recognized as an internal or external command, operable program or batch file. c:\Java_Dev>
The following code is from mavenRun.bat which we can use the set up the maven environment.
c:\Java_Dev>type mavenRun.bat set MAVEN_OPTS=-Xms256m -Xmx512m set M2_HOME=C:\Java_Dev\sdk\apache-maven-3.2.3 set M2=C:\Java_Dev\sdk\apache-maven-3.2.3\bin set PATH=%PATH%;C:\Java_Dev\sdk\apache-maven-3.2.3\bin;
Maven has two spots to store the settings files.
In the settings files we can configure settings for all Maven POM files. For instance, you can configure location of local repository and active build profile.
The settings files are called settings.xml.
The two settings files are located at:
$M2_HOME/conf/settings.xml${user.home}/.m2/settings.xmlBoth files are optional. If both files are present, the one in the user home settings file overrides the values in the Maven installation settings file.