# Apache Commons Configuration 2.15.0 API

Packages
Package
Description
org.apache.commons.configuration2
The Configuration main package.
org.apache.commons.configuration2.beanutils
In this package a `Configuration` implementation can be found that implements the `DynaBean` interface.
org.apache.commons.configuration2.builder
This package contains the implementations of configuration builder classes used to create new `Configuration` objects.
org.apache.commons.configuration2.builder.combined
A package containing the implementation of the builder for combined configurations.
org.apache.commons.configuration2.builder.fluent
This package defines a fluent API for setting up fully configured configuration builders.
org.apache.commons.configuration2.convert
This package contains interfaces and classes related to data type conversions.
org.apache.commons.configuration2.event
This package contains interfaces and classes for receiving notifications about changes at configurations.
org.apache.commons.configuration2.ex
This package contains all exception classes used by this library.
org.apache.commons.configuration2.interpol
A package with helper classes used for interpolation (variable substitution).
org.apache.commons.configuration2.io
A package with classes related to I/O operations.
org.apache.commons.configuration2.plist
Configuration classes supporting NeXT / OpenStep /GNUStep style configuration.
org.apache.commons.configuration2.reloading
This package contains classes and interfaces related to the reloading mechanism.
org.apache.commons.configuration2.resolver
A package containing EntityResolvers.
org.apache.commons.configuration2.spring
A package containing integrations for the Spring Framework.
org.apache.commons.configuration2.sync
A package containing interfaces and classes related to synchronization of configurations.
org.apache.commons.configuration2.tree
A package with helper and utility classes used by hierarchical configurations.
org.apache.commons.configuration2.tree.xpath
This package contains the `XPathExpressionEngine` class which enables XPATH support for querying configuration properties.
org.apache.commons.configuration2.web
This package contains some implementations of the `Configuration` interface that are useful in web environments.