How to build jars from IntelliJ properly

Question

I have a project that contains a single module  and some dependencies  I d like to create a jar  in a separate directory  that contains the compiled module  In addition  I d like to have the dependencies present beside my module   No matter how I twist IntelliJ s  build jar  process  the output of my module appears empty  besides a META-INF file

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This is still an issue in 2017  I hope it will help somebody out there  I found 2 possibilities to create working jar-s under IntelliJ 2017 2  1  Creating artifact from IntelliJ    Go to project structure       Create a new artifact       Select the main class  and be sure to change the manifest folder      You have to change manifest directory    lt project folder gt  src main java    replace  java  with  resources    lt project folder gt  src main resources   This is how it should look like      Then you choose the dependencies what you want to be packed IN your jar  or NEAR your jar file To build your artifact go to build artifacts and choose  rebuild   It will create an  out  folder with your jar file and its dependencies      2  Using maven-assembly-plugin  Add build section to the pom file       lt build gt           lt plugins gt               lt plugin gt                   lt artifactId gt maven-assembly-plugin lt  artifactId gt                   lt configuration gt                       lt finalName gt ServiceCreate lt  finalName gt                       lt appendAssemblyId gt false lt  appendAssemblyId gt                       lt archive gt                           lt manifest gt                               lt mainClass gt com svt optimoo App lt  mainClass gt                           lt  manifest gt                       lt  archive gt                       lt descriptorRefs gt                           lt descriptorRef gt jar-with-dependencies lt  descriptorRef gt                       lt  descriptorRefs gt                   lt  configuration gt               lt  plugin gt               lt plugin gt                   lt groupId gt org apache maven plugins lt  groupId gt                   lt artifactId gt maven-compiler-plugin lt  artifactId gt                   lt configuration gt                       lt source gt 1 8 lt  source gt                       lt target gt 1 8 lt  target gt                   lt  configuration gt               lt  plugin gt           lt  plugins gt       lt  build gt     Create a new run debug configuration       Choose application       Fill in the form Add the  assembly single  maven goal after build to be executed last        Save it  then run      This procedure will create the jar file under the  target  folder

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You might want to take a look at Maven  http   maven apache org   You can use it either as the main build process for your application  or just to perform certain tasks through the Edit Configurations dialog  The process of creating a JAR of a module within Maven is fairly trivial  if you want it to include all the dependencies in a self-executable JAR that is trivial as well   If you ve never used Maven before then you want to read Better Builds With Maven

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Here is the official answer of IntelliJ IDEA 2018 3 Help  I tried and It worked      To build a JAR file from a module          On the main menu  choose Build   Build Artifact    From the drop-down list  select the desired artifact of the type JAR    The list shows all the artifacts configured for the current project  To have all the configured artifacts built  choose the Build all   artifacts option

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If you are using third party libraries with your project or if you have problems with creating MANIFEST MF file properly  there can be conflicts when running JAR files generated using   File  gt  Project Structure  gt  Artifacts  gt       gt  JAR  gt  From modules with dependencies  gt          method mentioned above   Instead I suggest you to create an empty JAR and add all other elements to the output root manually  A wonderful blog article for this method can be found here  http   karthicraghupathi com 2016 07 10 creating-an-executable-jar-in-intellij-idea  I tried the steps mentioned there and everything worked fine for me

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It is probably little bit late  but I managed to solve it this way -   open with winrar and delete ECLIPSEF RSA and ECLIPSEF SF in META-INF folder  moreover put  Main-class  main class name   without   class   in MANIFEST MF  Make sure that you pressed  Enter  twice after the last line  otherwise it won t work

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Use Gradle to build your project  then the jar is within the build file  Here is a Stack Overflow link on how to build  jar files with Gradle  Java project with Gradle and building jar file in Intellij IDEA - how to

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In case you are reading this answer because you are facing  quot resource file not found quot  error  try this   File - gt  Project Structure - gt  Artiface - gt  New  type is Other  Give it a nice name  and in the Output Layout  press Create Archive to create a new jar  and again  give it a nice name    Click on the jar you just added  add your compiled module output in the jar  Click on the jar again  in the lower pane  select your project path and add Manifest File then set correct Main Class and Class Path  Click Add Library Files  and select libraries you need  you can use Ctrl A to select all   Build - gt  Build Artifact - gt  Clean  amp  Build and see if the error is gone

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Idea 8 1 3  Jar is ok  since there is compiled output in  output  directory  project out production     I guess  you have to run  make  before building jar  for dependencies just check  show library  and choose what you want

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When i use these solution this error coming  java -jar xxxxx jar   no main manifest attribute  in xxxxx jar  and solution is  You have to change manifest directory   lt project folder gt  src main java   change java to resources  lt project folder gt  src main resources

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With Maven you can use this plugin     lt build gt       lt plugins gt            lt plugin gt               lt artifactId gt maven-assembly-plugin lt  artifactId gt               lt configuration gt                   lt archive gt                       lt manifest gt                           lt mainClass gt  path you class main  lt  mainClass gt                       lt  manifest gt                   lt  archive gt                   lt descriptorRefs gt                       lt descriptorRef gt jar-with-dependencies lt  descriptorRef gt                   lt  descriptorRefs gt               lt  configuration gt               lt executions gt                   lt execution gt                       lt id gt make-assembly lt  id gt                       lt phase gt package lt  phase gt                        lt goals gt                           lt goal gt single lt  goal gt                       lt  goals gt                   lt  execution gt               lt  executions gt           lt  plugin gt       lt  plugins gt   lt  build gt

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I recently had this problem and think these steps are easy to follow if any prior solution or link is missing detail   How to create a  jar using IntelliJ IDEA 14 1 5    File   Save All  Run driver or class with main method  File   Project Structure  Select Tab  Artifacts   Click green plus button near top of window  Select JAR from Add drop down menu  Select  From modules with dependencies  Select main class  The radio button should be selecting  extract to the target JAR   Press OK  Check the box  Build on make  Press apply and OK  From the main menu  select the build dropdown  Select the option build artifacts

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In case you are trying to build a jar with kotlin you need to create a src main java folder and use this folder as a location for the META-INF folder

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For those that benefit from images as I do   File -  Project Structure

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Ant and Maven are widely used   I prefer Ant  I feel it s more lightweight and you the developer are more in control   Some would suggest that s its downside  -

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I was trying to build a jar from a multi-module Kotlin app and was getting the notorious  no main manifest attribute  error  Creating the manifest directory in src main resources didn t work either    Instead  it works when creating it in src directly  src META-INF MANIFEST MF

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My problem was this  I used Intellij IDEA  tried different versions    Gradle  When I compiled the project and builded artifacf jar  as indicated in the above responses  I received an error -  no main manifest attrubute       This solution worked for me  special thanks to Thilina Ashen Gamage  see above  for tip    Excerpt - if you use external libraries and build a project through Project Settings - Artifacts - Add     - Jar - From modules with dependencies  then probably because of a program bug the META-INF folder with MANIFEST MF file not including to jar  To avoid it create EMPTY jar file   Project Settings - Artifacts - Add     - Jar - EMPTY JAR  META-INF folder will added to resources folder  Then select your main class  You will see following jar structure   Note the presence of a folder META-INF Then you can build your project and build artifacts  This solution worked for javaFX applications too

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Some of the other answers are useless because as soon as you re-import the IntelliJ IDEA project from the maven project  all changes will be lost   The building of the jar needs to be triggered by a run debug configuration  not by the project settings   Jetbrains has a nice description of how you can accomplish this here   https   www jetbrains com help idea maven html  Scroll down to the section called  Configuring triggers for Maven goals     The only disadvantage of their description is that their screenshots are in the default black-on-white color scheme instead of the super-awesome darcula theme  Ugh    So  basically  what you do is that you open the  Maven Projects  panel  you find the project of interest   in your case  the project that builds your jar   underneath it you find the maven goal that you want to execute   usually the  package  goal creates jars   you open up the context menu on it   right-click on a Windows machine   and there will be an  Execute before Run Debug     option that you can select and it will take you by the hand from there   Really easy

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If you are working on spring mvn project you can use this command   mvn package -DskipTests   The jar file will be saved on target directoy

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Here are 2 examples with maven project  step by step   Method 1  Build jar with maven and pom xml   File  new  project  maven create a package   create a java program inside that package   at pom xml  add maven-jar-plugin        lt plugin gt           lt  -- Build an executable JAR -- gt           lt groupId gt org apache maven plugins lt  groupId gt           lt artifactId gt maven-jar-plugin lt  artifactId gt           lt version gt 3 1 0 lt  version gt           lt configuration gt               lt archive gt                   lt manifest gt                       lt addClasspath gt true lt  addClasspath gt                       lt classpathPrefix gt lib  lt  classpathPrefix gt                       lt mainClass gt somePackage sample lt  mainClass gt                   lt  manifest gt               lt  archive gt           lt  configuration gt       lt  plugin gt     screen capture   4  open maven project box by click on the search icon and type maven      click on clean  then click on install  your jar file will show up inside the target folder  test your jar using  java -jar      Method 2  Build jar with maven without pom xml change   File  new  project  maven create a package   create a java program inside that package  same as above  File -  Project Structure -  Project Settings -  Artifacts -  Click green plus sign -  Jar -  From modules with dependencies   Very important   The MANIFEST MF needs to be in your resources folder and the Main Class needs to refer to  package - class-name-that-contains-main-class       then click build on menu   build artifacts  build      find the jar in the out folder      run it

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As the people above says  but I have to note one point  You have to check the checkbox       Include in project build

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Here s how to build a jar with IntelliJ 10 http   blogs jetbrains com idea 2010 08 quickly-create-jar-artifact   File -  Project Structure -  Project Settings -  Artifacts -  Click green plus sign -  Jar -  From modules with dependencies     The above sets the  skeleton  to where the jar will be saved to  To actually build and save it do the following    Extract to the target Jar  OK  Build   Build Artifact   Build  Try Extracting the  jar file from  ProjectName   out   artifacts   ProjectName jar   ProjectName jar

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