CODEWITHSUNDEEP
mavenjar
Nadav Benedek
Nadav Benedek

Reputation: 1101

How to simply download a JAR using Maven?

How do I download JAR during a build in Maven script?

Upvotes: 110

Views: 197000

Answers (16)

kisna
kisna

Reputation: 3137

Or since 3.1, simply as:

mvn dependency:get -Dartifact=org.springframework:spring-instrument:3.2.3.RELEASE

This will place the JAR in the following directory:

~/.m2/repository/org/springframework/spring-instrument/3.2.3.RELEASE/

Upvotes: 72

yegor256
yegor256

Reputation: 105193

You can use this plugin:

<plugin>
  <groupId>com.googlecode.maven-download-plugin</groupId>
  <artifactId>download-maven-plugin</artifactId>
  <version>1.7.0</version>
  <executions>
    <execution>
      <phase>generate-test-resources</phase>
      <goals>
        <goal>wget</goal>
      </goals>
      <configuration>
        <uri>http://example.com/foo.zip</uri>
        <unpack>true</unpack>
        <maxLockWaitTime>100</maxLockWaitTime>
        <outputDirectory>${project.build.directory}/foo</outputDirectory>
        <md5>5b1f9712b75439446f2fe3d4e1339448</md5>
        <checkSignature>true</checkSignature>
      </configuration>
    </execution>
  </executions>
</plugin>

Upvotes: 0

Francesco
Francesco

Reputation: 441

You can use:

mvn dependency:copy \
  -Dartifact=<group>:<artifact-name>:<version> \
  -DoutputDirectory=/tmp/my_custom_dir

(Replace <values> with the ones of your case)

That's the full documentation of the goal: https://maven.apache.org/plugins/maven-dependency-plugin/copy-mojo.html

Note: the other "dependecy:get" way of doing this has been deprecated.

Upvotes: 31

ceving
ceving

Reputation: 23871

This works for me, but it downloads only the latest version:

#! /bin/bash
set -eu
if [[ -z ${1:-} || -z ${2:-} ]]; then
  printf 'Usage: %s group artifact\n' "$(basename "$0")" >&2
  exit 1
fi
g="$1"
a="$2"
url='https://search.maven.org'
v="$(curl -s "$url/solrsearch/select?q=g:$g+AND+a:$a&core=gav&rows=20&wt=json" |
          jq -r '.response.docs[0].v')"
curl -s -L -o "$a-$v.jar" "$url/remotecontent?filepath=${g//.//}/$a/$v/$a-$v.jar"

You need bash, curl and jq.

Example:

./maven-download net.sf.saxon Saxon-HE

Downloads Saxon-HE-11.4.jar today (2022-12-23).

Upvotes: 1

cameravinga
cameravinga

Reputation: 93

Updated 2022 answer for command line - building on Ivan Carcamo's answer:

wget [the link that Ivan Carcamo points to in his screenshot]

enter image description here

Edit: This may download the thin jar for some repositories, so you may need to find a different link for the fat jar

Upvotes: 6

Richie
Richie

Reputation: 21

All the jars are available directly in the maven central repository. You don't have to use "maven" if all you want is the jar.

https://repo.maven.apache.org/maven2/

If the pom dependency is

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>5.2.2</version>
</dependency>

You can download it from the corresponding directory structure by replacing the dots with forward slashses on the group id, artifact id, and version. I would navigate to the final folder to get the exact link of the jar.

https://repo.maven.apache.org/maven2/org/apache/poi/poi/5.2.2/poi-5.2.2.jar

Upvotes: 2

Ivan Carcamo
Ivan Carcamo

Reputation: 734

This is what I do (2022 answer), go to https://mvnrepository.com/, search for your .jar and click on here: enter image description here

Upvotes: 21

Damien LEGER
Damien LEGER

Reputation: 11

It's possible to download a JAR from a Gitlab Maven private repository. The URL is appearing when running some Maven command so it's a bit hacky but it's working for me.

Like this:

wget --header "PRIVATE-TOKEN: ${GITLAB_PRIVATE_TOKEN}" "https://gitlab.com/api/v4/projects/${GITLAB_PROJECT_ID}/packages/maven/${MAVEN_PACKAGE_NAME}/${MAVEN_VERSION}/${JAR_FILE}"

Where,

  • GITLAB_PRIVATE_TOKEN is a Gitlab Token with right "api" (atm the others are not enough)
    • GITLAB_PROJECT_ID e.g. 1462237
    • MAVEN_PACKAGE_NAME e.g. com/bar/foo
    • MAVEN_VERSION e.g. 0.0.1
    • JAR_FILE e.g. foo-0.0.1.jar

Upvotes: 1

WuFeng_Ph.D
WuFeng_Ph.D

Reputation: 1

Use the below code snip

result = subprocess.check_output('mvn org.apache.maven.plugins:maven-dependency-plugin:2.8:get \
                                     -DgroupId=%s \
                                     -DartifactId=%s \
                                     -Dversion=%s \
                                     -Dtransitive=false \
                                     -DremoteRepositories={repos_string} \
                                     -Dpackaging=jar \
                                     -DoutputDirectory=%s' % (group_id,
                                                              artifact_id,
                                                              version_name,
                                                              des_path), shell=True)
    logger.info("success download jar: %s" % each_version)
except Exception as e:
    logger.error("Error in download jar : %s" % str(e))

Upvotes: 0

riversun
riversun

Reputation: 838

You can download Jar package to specific directory.

mvn dependency:get -Dartifact=org.riversun:random-forest-codegen:1.0.0 -Ddest=./

Upvotes: 10

fgysin
fgysin

Reputation: 11943

If you just want to download a JAR once from a maven mirror I suggest you could just do this manually:

For Maven 1:
http://mirrors.ibiblio.org/pub/mirrors/maven/

For Maven 2:
http://mirrors.ibiblio.org/pub/mirrors/maven2/

These are the repositories (a mirror anyway) that maven will get its JARs from - you can easily access them in the webbrowser of your choice and download the JARs etc. Just browse through the hierarchy (it looks like any Java packag hierarchy) until you find the artefact, then pick the right version and you're good.

For example version 3.6.6.Final of hibernate-core from group org.hibernate you'd find here:

http://mirrors.ibiblio.org/pub/mirrors/maven2/org/hibernate/hibernate-core/3.6.6.Final/

Upvotes: 5

RockmanJoe
RockmanJoe

Reputation: 1678

You can setup a pom.xml to define your dependencies (the jars you want to copy). Then use the dependency:copy-dependencies goal to copy the jars to the desired location.

Upvotes: 4

Venkata Raju
Venkata Raju

Reputation: 5215

Note: This answer is for downloading the jars directly from maven without any scripts [That is how Google directed me here]

Assuming mvn dependency is like this:

<dependency>
    <groupId>com.zaxxer</groupId>
    <artifactId>HikariCP</artifactId>
    <version>2.4.7</version>
</dependency>

Goto http://search.maven.org and search for g:"com.zaxxer" AND a:"HikariCP" AND v:"2.4.7" (simply searching for HikariCP also works. You may need to select the appropriate GroupId and Version from the results)

In the Search Results -> Download column, you should see jar javadoc.jar sources.jar available for direct download

Upvotes: 37

Sean Patrick Floyd
Sean Patrick Floyd

Reputation: 299178

Maven does not work like that. Here's the closest you'll get to my knowledge:

mvn dependency:get -DremoteRepositories=http://repo1.maven.org/maven2/ \
                   -DgroupId=junit -DartifactId=junit -Dversion=4.8.2 \
                   -Dtransitive=false

Note that all parameters except transitive are required.
Also note that Maven will download the jar to your local repository, and there's no sensible way (that I know of) to copy it to a local directory.

Reference:

Upvotes: 90

Sam Goldberg
Sam Goldberg

Reputation: 6801

See How to use Maven pom to download jar files only. This worked really nicely for me.

My use case was that I wanted to download some of the dependency jars to deploy to a QA server, and was doing it manually (outside of the Maven build). I'm not sure exactly what your use case is.

Upvotes: 8

mliebelt
mliebelt

Reputation: 15525

Normally you don't use Maven for "just downloading", but for your build process. So normally, you do the following steps:

  1. Define a new project by defining the archetype of your project and some needed properties.
  2. Define as a dependency the library you want to use.
  3. Run Maven with mvn compile

As a side effect, you will have downloaded the library to your local Maven repository. There are a lot of plugins to do something with dependencies, so have e.g. a look at the Maven Dependency plugin.

Upvotes: 6

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