How do I include jars in a groovy script?

timdisney_14481 0
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I have a groovy script that needs a library in a jar. How do I add that to the classpath? I want the script to be executable so I'm using #!/usr/bin/env groovy at the top of my script.

classpath groovy jar java
9 Answers

If you really have to you can also load a JAR at runtime with:

this.getClass().classLoader.rootLoader.addURL(new File("file.jar").toURL())
Eric_Wendelin_250660

My Favorite way to do this is with Groovy Grapes. These access the Maven Central Repository, download the referenced jar, and then put it on the classpath. Then you can use the library like any other library. The syntax is really simple:

@Grab(group='com.google.collections', module='google-collections', version='1.0')

You can read more details here. One major advantage here is that you don't need to distribute your dependencies when you distribute your script. The only drawback to this method is that the Jar has to be in the Maven repository.

user_1705870

You can add the jars to $HOME/.groovy/lib

user_401450

You can also try out Groovy Grape. It lets you use annotations to modify the classpath. Its experimental right now, but pretty cool. See docs.groovy-lang.org/.../grape

Bob_Herrmann_65800

The same as you would in Java.

This is an example of running a MySQL status monitoring script. mysql.jar contains the MySQL connector that I call from script status.groovy.

groovy -cp mysql.jar status.groovy ct1

tessein_30750
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