How to build and run Maven projects after importing into Eclipse IDE

Question

I am learning building a Java project in Eclipse using Maven  I created a Java project HelloWorld from    maven-archetype-quickstart    template in a folder D  maven projects  Then to convert the Maven project to support Eclipse IDE  I navigated into the project folder and issued the commands  mvn eclipse eclipse and mvn package      Then I imported the project in Eclipse and did the necessary Eclipse configurations like setting the Maven local repository in Eclipse classpath  Now the project in D  EclipseWorkspace folder  I ran the project successfully in Eclipse printing  helloworld      Now if I want to go on develop the project and for that reason want to add new dependencies in pom xml in Eclipse  then the new jars are not added in classpath when I run the project     So my question is after importing a Maven project into Eclipse how can I add more and more dependencies in pom xml  then build and run the project  What is the recommended and efficient way to do this

User · Answer

1 Update project  Right Click on your project maven   update project  2 Build project  Right Click on your project again  run as   Maven build  If you have not created a    Run configuration    yet  it will open a new configuration with some auto filled values   You can change the name   Base directory  will be a auto filled value for you  Keep it as it is  Give maven command to    Goals    fields   i e      clean install    for building purpose   Click apply   Click run   3 Run project on tomcat  Right Click on your project again  run as   Run-Configuration  It will open Run-Configuration window for you   Right Click on    Maven Build    from the right side column and Select    New     It will open a blank configuration for you   Change the name as you want  For the base directory field you can choose values using 3 buttons workspace FileSystem Variables   You can also copy and paste the auto generated value from previously created Run-configuration  Give the Goals as    tomcat run     Click apply  Click run    If you want to get more clear idea with snapshots use the following link   Build and Run Maven project in Eclipse   I hope this answer will help someone come after the topic of the question

User · Answer

I would recommend you don t use the m2eclipse command line tools  i e  mvn eclipse eclipse  and instead use the built-in Maven support  known as m2e   Delete your project from Eclipse  then run mvn eclipse clean on your project to remove the m2eclipse project data  Finally  with a modern version of Eclipse  just do  Import   Maven   Existing project into workspace     and select your pom xml   M2e will automatically manage your dependencies and download them as required  It also supports Maven builds through a new  Run as Maven build     interface  It s rather nifty

User · Answer

When you add dependency in pom xml   do a maven clean   and then maven build   it will add the jars into you project   You can search dependency artifacts at http   mvnrepository com   And if it doesn t add jars it should give you errors which will mean that it is not able to fetch the jar  that could be due to broken repository or connection problems   Well sometimes if it is one or two jars  better download them and add to build path   but with a lot of dependencies use maven

User · Answer

Dependencies can be updated by using  Maven --  Update Project    in Eclipse using m2e plugin  after pom xml file modification

User · Answer

Just install the m2e plugin for Eclipse  Then a new command in Eclipse s Import statement will be added called  Import existing maven projects

User · Answer

answer 1   Right click on your project in eclipse go to maven -  Update Project   answer 2  simply press Alt F5  after updating your pom xml  This will build your project again and download all jar files

User · Answer

Right Click on your project Go to Maven Update Project Check the Force Update of Snapshots Releases Checkbox Click Ok   That s all  You can see progression of build in left below corner

[java] How to build and run Maven projects after importing into Eclipse IDE

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