# Package org.apache.catalina.util

Class Summary
Class | Description
--- | ---
Base64 | Deprecated Use `Base64` This class will be removed in Tomcat 8.
CharsetMapper | Utility class that attempts to map from a Locale to the corresponding character set to be used for interpreting input text (or generating output text) when the Content-Type header does not include one.
ConcurrentMessageDigest | A thread safe wrapper around `MessageDigest` that does not make use of ThreadLocal and - broadly - only creates enough MessageDigest objects to satisfy the concurrency requirements.
ContextName | Utility class to manage context names so there is one place where the conversions between baseName, path and version take place.
Conversions |
CustomObjectInputStream | Custom subclass of `ObjectInputStream` that loads from the class loader for this web application.
DateTool | Deprecated Mostly unused and will be removed in 8.0.x onwards
DOMWriter | A sample DOM writer.
Enumerator<T> | Deprecated Replaced by java.util.Collections#enumeration(..)
Extension | Utility class that represents either an available "Optional Package" (formerly known as "Standard Extension") as described in the manifest of a JAR file, or the requirement for such an optional package.
ExtensionValidator | Ensures that all extension dependencies are resolved for a WEB application are met.
InstanceSupport | Support class to assist in firing InstanceEvent notifications to registered InstanceListeners.
Introspection | Provides introspection utilities that either require knowledge of Tomcat internals or are solely used by Tomcat internals.
IOTools | Contains commonly needed I/O-related methods
LifecycleBase | Base implementation of the `Lifecycle` interface that implements the state transition rules for `Lifecycle.start()` and `Lifecycle.stop()`
LifecycleMBeanBase |
LifecycleSupport | Support class to assist in firing LifecycleEvent notifications to registered LifecycleListeners.
ManifestResource | Representation of a Manifest file and its available extensions and required extensions
MD5Encoder | Encode an MD5 digest into a String.
MIME2Java | MIME2Java is a convenience class which handles conversions between MIME charset names and Java encoding names.
ParameterMap<K,V> | Extended implementation of HashMap that includes a `locked` property.
RequestUtil | General purpose request parsing and encoding utility methods.
ResourceSet<T> | Extended implementation of HashSet that includes a `locked` property.
SchemaResolver | Deprecated Use `LocalResolver`
ServerInfo | Simple utility module to make it easy to plug in the server identifier when integrating Tomcat.
SessionConfig |
SessionIdGenerator |
Strftime | Converts dates to strings using the same format specifiers as strftime Note: This does not mimic strftime perfectly.
StringParser | Utility class for string parsing that is higher performance than StringParser for simple delimited text cases.
TomcatCSS |
URLEncoder | This class is very similar to the java.net.URLEncoder class.
XMLWriter | XMLWriter helper class.