Gradle - jar file name in java plugin

I am trying with Gradle first time. I am trying with a maven java project to compile and create a jar file. It is compiling and creating the jar file in build/libs directory as

> trunk-XXXVERSION-SNAPSHOT.jar

I am running gradle build file from trunk directory of this maven java project.

I want to get the project name (for ex: project1) in the jar file name, something like

> project1-XXXVERSION-SNAPSHOT.jar

in build/libs directory. Please suggest.

Here is the directory structure:

trunk
˪ build
  ˪ libs
    ˪ project1-1.0-SNAPSHOT.jar 
˪ build.gradle

Include the following in build.gradle:

apply plugin: 'java'
apply plugin: 'maven'

archivesBaseName = 'project1'
version = '1.0-SNAPSHOT'
group = 'example'
     

This will produce the correct ZIPs, POMs and JARs.

---

Additionally, try setting:

archivesBaseName = 'project1'

or (deprecated):

jar.baseName = 'project1'

The default project name is taken from the directory the project is stored in. Instead of changing the naming of the jar explicitly you should set the project name correct for your build. At the moment this is not possible within the build.gradle file. Instead, you have to create a settings.gradle file in your root directory. This settings.gradle file should have this one liner included:

rootProject.name = 'project1'

I recently migrated to gradle 4.6 (from 3. something) and the

jar {
    baseName = 'myjarname'
}

stopped working, gradle named my jar from the folder name.

So I switched to archivesBaseName = 'myjarname' which works.

Maybe this helps somebody else too.

If you has some submobule, you can use in build.gradle (for jar)

configurations {
    jar.archiveName = 'submodule-jar.jar'
}

In Kotlin DSL you can also use:

tasks.jar {
    archiveFileName.set("app.jar")
}

With Spring boot and Kotlin DSL you can use:

tasks {
    bootJar {
        archiveFileName.set("app.jar")
    }
}

Currently using Kotlin as Gradle DSL. Following statement works for me:

tasks.withType<AbstractArchiveTask> {
	setProperty("archiveFileName", "hello-world.jar")
}

It works on Spring Boot executable jars as well.

If you want to keep version numbers:

tasks.withType<AbstractArchiveTask> {
	setProperty("archiveBaseName", "hello-world")
}

It will produce something like hello-world-1.2.3.jar

If you are using a newer Gradle version, baseName, archiveName will now be deprecated. Instead, use something like

jar {
   archivesBaseName = 'project1'
   archiveVersion = '1.0-SNAPSHOT'
}

if you want to append a date to the jar file name, you can do it like this:

jar {
    baseName +='_' +new java.text.SimpleDateFormat("dd_MM_yyyy").format(new java.util.Date())
    println(baseName) // just to verify

which results in <basename>_07_05_2020.jar

You have to remove the 'version' tag in your build.gradle file!