How are mvn clean package and mvn clean install different

Question

What exactly are the differences between mvn clean package and mvn clean install  When I run both of these commands  they both seem to do the same thing

User · Answer

package will add packaged jar or war to your  target folder  We can check it when  we empty the target folder  using  mvn clean  and then run mvn package   install will do all the things that package does  additionally it will add packaged jar or war in local repository as well  We can confirm it by checking in your  m2 folder

User · Answer

What clean does  common in both the commands  - removes all files generated by the previous build    Coming to the difference between the commands package and install  you first need to understand the lifecycle of a maven project    These are the default life cycle phases in maven   validate - validate the project is correct and all necessary information is available compile - compile the source code of the project test - test the compiled source code using a suitable unit testing framework  These tests should not require the code be packaged or deployed package - take the compiled code and package it in its distributable format  such as a JAR  verify - run any checks on results of integration tests to ensure quality criteria are met install - install the package into the local repository  for use as a dependency in other projects locally deploy - done in the build environment  copies the final package to the remote repository for sharing with other developers and projects      How Maven works is  if you run a command for any of the lifecycle phases  it executes each default life cycle phase in order  before executing the command itself   order of execution     validate    compile    test  optional     package    verify    install    deploy   So when you run the command mvn package  it runs the commands for all lifecycle phases till package     validate    compile    test  optional     package   And as for mvn install  it runs the commands for all lifecycle phases till install  which includes package as well     validate    compile    test  optional     package    verify    install     So  effectively what it means is  install commands does everything that package command does and some more  install the package into the local repository  for use as a dependency in other projects locally   Source  Maven lifecycle reference

User · Answer

Well  both will clean   That means they ll remove the target folder    The real question is what s the difference between package and install     package will compile your code and also package it   For example  if your pom says the project is a jar  it will create a jar for you when you package it and put it somewhere in the target directory  by default    install will compile and package  but it will also put the package in your local repository   This will make it so other projects can refer to it and grab it from your local repository   Documentation

User · Answer

package will generate Jar war as per POM file  install will install generated jar file to the local repository for other dependencies if any   install phase comes after package phase

User · Answer

Package  amp  install are various phases in maven build lifecycle  package phase will execute all phases prior to that  amp  it will stop with packaging the project as a jar  Similarly install phase will execute all prior phases  amp  finally install the project locally for other dependent projects    For understanding maven build lifecycle please go through the following link https   ayolajayamaha blogspot in 2014 05 difference-between-mvn-clean-install html

[java] How are "mvn clean package" and "mvn clean install" different?

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