How to use Kotlinx serialization with jvm plugin - kotlin

Question

I can't use Kotlinx serialization with the Kotlin JVM plugin
In the instructions for Groovy DSL:
plugins {
id 'org.jetbrains.kotlin.multiplatform' version '1.5.0'
id 'org.jetbrains.kotlin.plugin.serialization' version '1.5.0'
}
Because I already use the org.jetbrains.kotlin.jvm, I want to use it with the JVM plugin but the instructions do not explicitly show how.
In build.gradle, I tried using:
plugins {
id 'org.jetbrains.kotlin.jvm' version '1.5.0'
id 'org.jetbrains.kotlin.plugin.serialization' version '1.5.0'
...
}
In code:
import kotlinx.serialization.*
And, I get a compilation error (Unresolved reference: serialization). How can I use kotlinx serialization with the JVM plugin? Also, I need it in the Groovy DSL syntax. The instructions already show it for the Kotlin DSL but I don't use it. Can anyone help?

Answer 1

The plugin is not sufficient to use Kotlinx Serialization, you also need the runtime library to use classes from the kotlinx.serialization.* packages.
This is covered in the docs:
https://github.com/Kotlin/kotlinx.serialization#dependency-on-the-json-library
In Gradle, this means you need to add Kotlinx serialization as a dependency in the dependencies block:
repositories {
mavenCentral()
}
dependencies {
implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.2.1"
}
If you need other formats than JSON, you'll need to add the corresponding artifact instead.