---
title: "Using Rest PKI on Java"
description: "Using Rest PKI on Java: Spring MVC samples for Java 7+ and Java 6, and the Maven restpki-client libraries for each Java version."
canonical: "https://docs.lacunasoftware.com/en-us/articles/rest-pki/java"
locale: "en"
product: "Rest PKI (legacy)"
last_updated: "2026-10-12"
---

# Using Rest PKI on Java

Rest PKI can be used on Java applications using a wide range of frameworks and platforms.
To get started, choose one of the available samples projects:

* [Spring MVC (Java 7+)](https://docs.lacunasoftware.com/en-us/articles/rest-pki/java/mvc)
* [Spring MVC (Java 6)](https://docs.lacunasoftware.com/en-us/articles/rest-pki/java/mvc-java6)

## Client libraries

The usage of Rest PKI on Java applications should be done using one of the following packages:

* For Java 7+: [com.lacunasoftware.restpki:restpki-client](https://search.maven.org/artifact/com.lacunasoftware.restpki/restpki-client)
* For Java 6: [com.lacunasoftware.restpki:restpki-client-java6](https://search.maven.org/artifact/com.lacunasoftware.restpki/restpki-client-java6)

### Referencing the package (Java 7+)

Versions 1.15.9 and later of `restpki-client` are compiled for Java 8. On Java 7, use version 1.15.7.

If your project uses **Maven**, add this to your `pom.xml`:

```xml
<dependencies>
	...
	<dependency>
		<groupId>com.lacunasoftware.restpki</groupId>
		<artifactId>restpki-client</artifactId>
		<version>1.15.11</version>
	</dependency>
	...
</dependencies>
```

If your project uses **Gradle**, add this to your `build.gradle`:

```groovy
repositories {
	mavenCentral()
} 

dependencies {
	implementation("com.lacunasoftware.restpki:restpki-client:1.15.11")
}
```

### Referencing the package (Java 6)

If your project uses **Maven**, add this to your `pom.xml`:

```xml
<dependencies>
	...
	<dependency>
		<groupId>com.lacunasoftware.restpki</groupId>
		<artifactId>restpki-client-java6</artifactId>
		<version>1.9.0</version>
	</dependency>
	...
</dependencies>
```

If your project uses **Gradle**, add this to your `build.gradle`:

```groovy
repositories {
	mavenCentral()
} 

dependencies {
	implementation("com.lacunasoftware.restpki:restpki-client-java6:1.9.0")
}
```

### API Reference

See the package [javadoc](https://docs.lacunasoftware.com/en-us/content/javadocs/restpki-client/).

> **Note**
>
> The javadoc is actually for the Java 7+ version of the library, but the APIs of both packages are almost identical.

### Source code

The packages are open-source, hosted on:

* Java 7+ version: [BitBucket](https://bitbucket.org/Lacunas/restpki-java-client)
* Java 6 version: [GitHub](https://github.com/LacunaSoftware/RestPkiJava6Client)

Feel free to fork the packages if you need to make any customizations.