@NonNullApi @NonNullFields

Package org.springframework.util

Miscellaneous utility classes, such as utilities for working with strings, classes, collections, reflection, etc.

See: Description

Interface Summary

Interface	Description
AutoPopulatingList.ElementFactory<E>	Factory interface for creating elements for an index-based access data structure such as a List.
ConcurrentReferenceHashMap.Reference<K,V>	A reference to an ConcurrentReferenceHashMap.Entry contained in the map.
ErrorHandler	A strategy for handling errors.
IdGenerator	Contract for generating universally unique identifiers (UUIDs).
MultiValueMap<K,V>	Extension of the Map interface that stores multiple values.
PathMatcher	Strategy interface for String-based path matching.
PropertiesPersister	Strategy interface for persisting java.util.Properties, allowing for pluggable parsing strategies.
PropertyPlaceholderHelper.PlaceholderResolver	Strategy interface used to resolve replacement values for placeholders contained in Strings.
ReflectionUtils.FieldCallback	Callback interface invoked on each field in the hierarchy.
ReflectionUtils.FieldFilter	Callback optionally used to filter fields to be operated on by a field callback.
ReflectionUtils.MethodCallback	Action to take on each method.
ReflectionUtils.MethodFilter	Callback optionally used to filter methods to be operated on by a method callback.
RouteMatcher	Contract for matching routes to patterns.
RouteMatcher.Route	A parsed representation of a route.
StringValueResolver	Simple strategy interface for resolving a String value.

Class Summary

Class	Description
AlternativeJdkIdGenerator	An IdGenerator that uses SecureRandom for the initial seed and Random thereafter, instead of calling UUID.randomUUID() every time as JdkIdGenerator does.
AntPathMatcher	PathMatcher implementation for Ant-style path patterns.
AntPathMatcher.AntPathStringMatcher	Tests whether a string matches against a pattern via a Pattern.
AntPathMatcher.AntPatternComparator	The default Comparator implementation returned by AntPathMatcher.getPatternComparator(String).
Assert	Assertion utility class that assists in validating arguments.
AutoPopulatingList<E>	Simple List wrapper class that allows for elements to be automatically populated as they are requested.
Base64Utils	A simple utility class for Base64 encoding and decoding.
ClassUtils	Miscellaneous java.lang.Class utility methods.
CollectionUtils	Miscellaneous collection utility methods.
CommonsLogWriter	java.io.Writer adapter for a Commons Logging Log.
CompositeIterator<E>	Composite iterator that combines multiple other iterators, as registered via CompositeIterator.add(Iterator).
ConcurrencyThrottleSupport	Support class for throttling concurrent access to a specific resource.
ConcurrentLruCache<K,V>	Simple LRU (Least Recently Used) cache, bounded by a specified cache limit.
ConcurrentReferenceHashMap<K,V>	A ConcurrentHashMap that uses soft or weak references for both keys and values.
ConcurrentReferenceHashMap.Entry<K,V>	A single map entry.
CustomizableThreadCreator	Simple customizable helper class for creating new Thread instances.
DefaultPropertiesPersister	Default implementation of the PropertiesPersister interface.
DigestUtils	Miscellaneous methods for calculating digests.
ExceptionTypeFilter	An InstanceFilter implementation that handles exception types.
FastByteArrayOutputStream	A speedy alternative to ByteArrayOutputStream.
FileCopyUtils	Simple utility methods for file and stream copying.
FileSystemUtils	Utility methods for working with the file system.
InstanceFilter<T>	A simple instance filter that checks if a given instance match based on a collection of includes and excludes element.
JdkIdGenerator	An IdGenerator that calls UUID.randomUUID().
LinkedCaseInsensitiveMap<V>	LinkedHashMap variant that stores String keys in a case-insensitive manner, for example for key-based access in a results table.
LinkedMultiValueMap<K,V>	Simple implementation of MultiValueMap that wraps a LinkedHashMap, storing multiple values in an ArrayList.
MethodInvoker	Helper class that allows for specifying a method to invoke in a declarative fashion, be it static or non-static.
MimeType	Represents a MIME Type, as originally defined in RFC 2046 and subsequently used in other Internet protocols including HTTP.
MimeType.SpecificityComparator<T extends MimeType>	Comparator to sort MimeTypes in order of specificity.
MimeTypeUtils	Miscellaneous MimeType utility methods.
MultiValueMapAdapter<K,V>	Adapts a given Map to the MultiValueMap contract.
NumberUtils	Miscellaneous utility methods for number conversion and parsing.
ObjectUtils	Miscellaneous object utility methods.
PatternMatchUtils	Utility methods for simple pattern matching, in particular for Spring's typical "xxx*", "*xxx" and "*xxx*" pattern styles.
PropertyPlaceholderHelper	Utility class for working with Strings that have placeholder values in them.
ReflectionUtils	Simple utility class for working with the reflection API and handling reflection exceptions.
ResizableByteArrayOutputStream	An extension of ByteArrayOutputStream that: has public ResizableByteArrayOutputStream.grow(int) and ResizableByteArrayOutputStream.resize(int) methods to get more control over the size of the internal buffer has a higher initial capacity (256) by default
ResourceUtils	Utility methods for resolving resource locations to files in the file system.
SerializationUtils	Static utilities for serialization and deserialization using Java Object Serialization.
SimpleIdGenerator	A simple IdGenerator that starts at 1, increments up to Long.MAX_VALUE, and then rolls over.
SimpleRouteMatcher	RouteMatcher that delegates to a PathMatcher.
SocketUtils	Deprecated as of Spring Framework 5.3.16, to be removed in 6.0; see class-level Javadoc for details.
StopWatch	Simple stop watch, allowing for timing of a number of tasks, exposing total running time and running time for each named task.
StopWatch.TaskInfo	Nested class to hold data about one task executed within the StopWatch.
StreamUtils	Simple utility methods for dealing with streams.
StringUtils	Miscellaneous String utility methods.
SystemPropertyUtils	Helper class for resolving placeholders in texts.
TypeUtils	Utility to work with generic type parameters.

Enum Summary

Enum	Description
ConcurrentReferenceHashMap.ReferenceType	Various reference types supported by this map.
ConcurrentReferenceHashMap.Restructure	The types of restructuring that can be performed.

Exception Summary

Exception	Description
AutoPopulatingList.ElementInstantiationException	Exception to be thrown from ElementFactory.
InvalidMimeTypeException	Exception thrown from MimeTypeUtils.parseMimeType(String) in case of encountering an invalid content type specification String.

Package org.springframework.util Description

Miscellaneous utility classes, such as utilities for working with strings, classes, collections, reflection, etc.