HowToDoInJava

M2_REPO – Change maven repository location in eclipse

By | Filed Under: Maven

Maven dependencies can be read from Eclipse IDE which maven exposes through M2_REPO classpath variable. m2_repo points to maven’s local repository location in workspace.

m2_repo class variable must be added to eclipse’s class path variable on build path before using maven’s dependencies.

1. Manually change maven repository location in Eclipse

1.1. Navigate to Windows > Preferences

eclipse-preferences

1.2. Navigate to Java > Build path > Classpath Variables

classpath_variables_for_projects

1.3. Define new classpath variable “M2_REPO”

Create new variable M2_REPO and point it to maven local repository location.

add_maven_repository

1.4. Verify that variable has been added

m2_repo_variable_added

2. Update M2_REPO from command line – eclipse:configure-workspace

Alternatively, you can define and add M2_REPO via Maven command "eclipse:configure-workspace".

For example this is the output of command in my system.

Microsoft Windows [Version 10.0.17134.228]
(c) 2018 Microsoft Corporation. All rights reserved.

C:\Users\Lokesh>mvn -Declipse.workspace="E:\devsetup\workspace" eclipse:configure-workspace
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------< org.apache.maven:standalone-pom >-------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] --- maven-eclipse-plugin:2.10:configure-workspace (default-cli) @ standalone-pom ---
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.815 s
[INFO] Finished at: 2018-09-09T14:50:20+05:30
[INFO] ------------------------------------------------------------------------
Add m2_repo from command prompt
Add m2_repo from command prompt

Happy Learning !!

Feedback, Discussion and Comments

  1. changed facet correctly, but to create web application from scratch mvn archetype:generate
    is stopping at number 242 :242 which creates, not a simple quick start web project but plugin project.
    which does not takes dependencies in pom file .
    so why mvn behavior is correct ?as it has so many options up till 710 , so what do ?

    Reply

  2. I don’t have Modify Project option in projects facets page
    what to do?

    Reply

  3. yes I have added the repository but demoWebApplication gives folloing error
    when I changed java compiler from 1.7 to 1.6 ,even for java 1.7 this error was there
    Description Resource Path Location Type

    Java compiler level does not match the version of the installed Java project facet. demoWebApplication Unknown Faceted Project Problem (Java Version Mismatch)

    and when I create myfirstServlet and try to run it ,it gives
    HTTP 404 error-requested re source not available

    Pl give the remedy

    Reply

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