I'm trying to port a legacy Java webapp project into gradle.
This is a snippet of my build.gradle
def customBuildPath = 'build/classes'
war {
from(customBuildPath) {
into 'WEB-INF/classes'
}
from('WebContent') {
include 'Web/**/*'
into ''
}
}
dependencies {
compile fileTree(dir: 'projectlibs/lib', include:'*.jar')
compile fileTree(dir: 'build/classes', include:'**')
}
To maintain the custom structure I want to put all my *.class files under WEB-INF/classes and it works, but I find also the same *.class files under WEB-INF/lib.
My goal it to keep jars and classes in separated war folder.
Any thoughts?
Edit: Added dependencies{} to the build.gradle snippet.
Problem get solved with commenting out builded classes from the dependencies:
def customBuildPath = 'build/classes'
war {
from(customBuildPath) {
into 'WEB-INF/classes'
}
from('WebContent') {
include 'Web/**/*'
into ''
}
}
dependencies {
compile fileTree(dir: 'projectlibs/lib', include:'*.jar')
// compile fileTree(dir: 'build/classes', include:'**')
}
I have tried to add my local .jar file dependency to my build.gradle file:
apply plugin: 'java'
sourceSets {
main {
java {
srcDir 'src/model'
}
}
}
dependencies {
runtime files('libs/mnist-tools.jar', 'libs/gson-2.2.4.jar')
runtime fileTree(dir: 'libs', include: '*.jar')
}
And you can see that I added the .jar files into the referencedLibraries folder here: https://github.com/WalnutiQ/wAlnut/tree/version-2.3.1/referencedLibraries
But the problem is that when I run the command: gradle build on the command line I get the following error:
error: package com.google.gson does not exist
import com.google.gson.Gson;
Here is my entire repo: https://github.com/WalnutiQ/wAlnut/tree/version-2.3.1
According to the documentation, use a relative path for a local jar dependency as follows.
Groovy syntax:
dependencies {
implementation files('libs/something_local.jar')
}
Kotlin syntax:
dependencies {
implementation(files("libs/something_local.jar"))
}
If you really need to take that .jar from a local directory,
Add next to your module gradle (Not the app gradle file):
repositories {
flatDir {
dirs("libs")
}
}
dependencies {
implementation("gson-2.2.4")
}
However, being a standard .jar in an actual maven repository, why don't you try this?
repositories {
mavenCentral()
}
dependencies {
implementation("com.google.code.gson:gson:2.2.4")
}
You could also do this which would include all JARs in the local repository. This way you wouldn't have to specify it every time.
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
}
The following works for me:
compile fileTree(dir: 'libs', include: '*.jar')
Refer to the Gradle Documentation.
You can try reusing your local Maven repository for Gradle:
Install the jar into your local Maven repository:
mvn install:install-file -Dfile=utility.jar -DgroupId=com.company -DartifactId=utility -Dversion=0.0.1 -Dpackaging=jar
Check that you have the jar installed into your ~/.m2/ local Maven repository
Enable your local Maven repository in your build.gradle file:
repositories {
mavenCentral()
mavenLocal()
}
dependencies {
implementation ("com.company:utility:0.0.1")
}
Now you should have the jar enabled for implementation in your project
A solution for those using Kotlin DSL
The solutions added so far are great for the OP, but can't be used with Kotlin DSL without first translating them. Here's an example of how I added a local .JAR to my build using Kotlin DSL:
dependencies {
compile(files("/path/to/file.jar"))
testCompile(files("/path/to/file.jar"))
testCompile("junit", "junit", "4.12")
}
Remember that if you're using Windows, your backslashes will have to be escaped:
...
compile(files("C:\\path\\to\\file.jar"))
...
And also remember that quotation marks have to be double quotes, not single quotes.
Edit for 2020:
Gradle updates have deprecated compile and testCompile in favor of implementation and testImplementation. So the above dependency block would look like this for current Gradle versions:
dependencies {
implementation(files("/path/to/file.jar"))
testImplementation(files("/path/to/file.jar"))
testImplementation("junit", "junit", "4.12")
}
The accepted answer is good, however, I would have needed various library configurations within my multi-project Gradle build to use the same 3rd-party Java library.
Adding '$rootProject.projectDir' to the 'dir' path element within my 'allprojects' closure meant each sub-project referenced the same 'libs' directory, and not a version local to that sub-project:
//gradle.build snippet
allprojects {
...
repositories {
//All sub-projects will now refer to the same 'libs' directory
flatDir {
dirs "$rootProject.projectDir/libs"
}
mavenCentral()
}
...
}
EDIT by Quizzie: changed "${rootProject.projectDir}" to "$rootProject.projectDir" (works in the newest Gradle version).
Shorter version:
dependencies {
implementation fileTree('lib')
}
The Question already has been answered in detail. I still want to add something that seems very surprising to me:
The "gradle dependencies" task does not list any file dependencies. Even though you might think so, as they have been specified in the "dependencies" block after all..
So don't rely on the output of this to check whether your referenced local lib files are working correctly.
A simple way to do this is
compile fileTree(include: ['*.jar'], dir: 'libs')
it will compile all the .jar files in your libs directory in App.
Some more ways to add local library files using Kotlin DSL (build.gradle.kts):
implementation(
files(
"libs/library-1.jar",
"libs/library-2.jar",
"$rootDir/foo/my-other-library.jar"
)
)
implementation(
fileTree("libs/") {
// You can add as many include or exclude calls as you want
include("*.jar")
include("another-library.aar") // Some Android libraries are in AAR format
exclude("bad-library.jar")
}
)
implementation(
fileTree(
"dir" to "libs/",
// Here, instead of repeating include or exclude, assign a list of paths
"include" to "*.jar",
"exclude" to listOf("bad-library-1.jar", "bad-library-2.jar")
)
)
The above code assumes that the library files are in libs/ directory of the module (by module I mean the directory where this build.gradle.kts is located).
You can use Ant patterns in includes and excludes as shown above.
See Gradle documentations for more information about file dependencies.
Thanks to this post for providing a helpful answer.
I couldn't get the suggestion above at https://stackoverflow.com/a/20956456/1019307 to work. This worked for me though. For a file secondstring-20030401.jar that I stored in a libs/ directory in the root of the project:
repositories {
mavenCentral()
// Not everything is available in a Maven/Gradle repository. Use a local 'libs/' directory for these.
flatDir {
dirs 'libs'
}
}
...
compile name: 'secondstring-20030401'
The best way to do it is to add this in your build.gradle file and hit the sync option
dependency{
compile files('path.jar')
}
The solution which worked for me is the usage of fileTree in build.gradle file.
Keep the .jar which need to add as dependency in libs folder. The give the below code in dependenices block in build.gradle:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
}
You can add jar doing:
For gradle just put following code in build.gradle:
dependencies {
...
compile fileTree(dir: 'lib', includes: ['suitetalk-*0.jar'])
...
}
and for maven just follow steps:
For Intellij:
File->project structure->modules->dependency tab-> click on + sign-> jar and dependency->select jars you want to import-> ok-> apply(if visible)->ok
Remember that if you got any java.lang.NoClassDefFoundError: Could not initialize class exception at runtime this means that dependencies in jar not installed for that you have to add all dependecies in parent project.
For Gradle version 7.4 with Groovy build file
repositories {
flatDir {
dirs 'libs'
}
}
dependencies {
implementation ':gson-2.2.4'
}
If you are on gradle 4.10 or newer:
implementation fileTree(dir: 'libs', includes: ['*.jar'])
Goto File -> Project Structure -> Modules -> app -> Dependencies Tab -> Click on +(button) -> Select File Dependency - > Select jar file in the lib folder
This steps will automatically add your dependency to gralde
Very Simple
Be careful if you are using continuous integration, you must add your libraries in the same path on your build server.
For this reason, I'd rather add jar to the local repository and, of course, do the same on the build server.
An other way:
Add library in the tree view. Right click on this one. Select menu "Add As Library".
A dialog appear, let you select module. OK and it's done.
If transitive libs aren't packaged with the JAR task:
By default, jar task in gradle builds an executable jar file from your project source files. It will not contain any transitive libs that are needed for your program.
To the contrary, Netbeans does package JAR dependencies or transitive libs. Rather than a fat JAR how does gradle include libs?
plugins {
id 'com.gradle.build-scan' version '1.8'
id 'java'
id 'application'
}
mainClassName = 'net.bounceme.dur.mbaas.json.Main'
buildScan {
licenseAgreementUrl = 'https://gradle.com/terms-of-service'
licenseAgree = 'yes'
}
repositories {
jcenter()
}
jar {
manifest {
attributes 'Main-Class': 'net.bounceme.dur.mbaas.json.Main'
}
}
dependencies {
//compile fileTree(dir: 'libs', include: ['*.jar'])
runtime group: 'com.google.firebase', name: 'firebase-admin', version: '5.2.0'
compile fileTree(dir: 'lib', include: '*.jar')
}
in relation to another question: what's the "way" to package libs with the JAR task which doesn't result in a "fat JAR"?
When using the application plugin, all libraries used by the application (own jar or transitive libraries) are put in a libs folder when packaged as an app. then these libs are referenced in the shell or batch script as classpath when launching the app.
The easiest way to create a fatjar in gradle, is to use the shadow plugin available via the plugin portal. see https://plugins.gradle.org/plugin/com.github.johnrengelman.plugin-shadow for details
I have in gradle.build:
dependencies {
classpath 'something:1.0'
}
What I need to add in the file to add a local .jar file, which java can "import"?
But I don't need to include this .jar in my application. Just like a shared library.
I tried:
classpath 'something:1.0','somethingelse:1.0'
classpath 'something:1.0, somethingelse:1.0'
classpath { 'something:1.0','somethingelse:1.0' }
compile files('somethingelse.jar')
classpath files('lib/somethingelse.jar')
classpath fileTree(dir: 'lib', include: '*.jar')
I think you want compile name: This recipie is in a gradle file I inherited.
repositories {
flatDir {
dirs 'lib'
}
dependencies {
compile name: 'jdom'
compile name: 'jebl-0.3'
}
BTW, this question appears to be a duplicate of
How to add local .jar file dependency to build.gradle file?
I have eclipse java project.
Gradle script:
apply plugin: 'java'
jar {
manifest {
attributes 'Title': 'xxx'
}
}
repositories {
mavenCentral()
}
dependencies {
compile fileTree(dir: 'lib', include: '**/*.jar')
}
def myPackage = 'mypackage'
sourceSets {
main {
java.srcDirs = ['src']
}
}
Project file structure
src
com.company.core
....classes
com.company.impl
....classes
In jar file need file structure
com.company.core
...classes
com.mypackage.impl
...classes
Need to rename package
company -> mypackge in jar file
It is not android.
Help please.
UPD
Thanks, Lance Java.
It working for me.
But there was a problem. All classes from libs (google-play-services.jar, android.jar) come into jar... I need classes located only in src folder... I can to exclude classes by all packages, but i think it is no good solution...
Is there another way whith shadowJar?
My dependencies:
dependencies {
compile files('libs/android.jar')
compile files('libs/google-play-services.jar')
}
This can be done with the shadow plugin
See relocating packages