String zkConnection = "localhost:2181"; // ZooKeeper connection string
                                        // use normal zk connection string here
int zkTimeout = 5000; // timeout
                      // used for zkSessionTimeout and initial connectionTimeout
String zkRoot = "/config"; // path where to read/store the configuration
                           // will be (recursively) created as needed.

String key = "my-key";
// Constructor will block until connection is established
Configuration config = new ZookeeperConfiguration(zkConnection, zkTimeout, zkRoot);

// Use the Configuration object like any other Commons-Configuration implementation.
String val = config.getString(key);

config.setProperty(key, "Foo");

config.addProperty(key, "Bar");

List<?> vals = config.getList(key);

config.clearProperty(key);

<dependency>
    <groupId>com.github.ja-fra.zk-configuration</groupId>
    <artifactId>zkconfig</artifactId>
    <version>0.1.0</version>
</dependency>