commons-lang的常用工具类整理

一、commons-lang3

1、 字符串，数字，日期，数组等工具类

StringUtils 字符串工具类

包含判断方法：contains/containsXXX 
字符串替换方法:replace/replaceXXX 
获取子串：substring/substringXXX 
判断方法：
1、isEmpty/isNotEmpty/isBlank/isNotBlank/isNumeric/isWhitespace
2、sartsWith/startsWithAny/endsWith/endsWithIgnoreCase
索引(index)：indexOf/indexOfXXX/tIndexOf/lastIndexOfXXX
处理方法：
    abbreviate 缩短 capitalise 首字母 repeat 重复 left/right/center 左右中间
    removeXXX 移除 trimXXX 去空  reverseXXX 翻转 stripXXX 移除
    defaultXXX 默认 lowerCase/upperCase deleteXXX 删除处理
    splitXXX分解处理 join 拼接

StringEscapeUtils

escapeCsv/unescapeCsv/escapeHtml/unescapeHtml/escapeJava/unescapeJava
escapeJavaScript/unescapeJavaScript/escapeXml/unescapeXml/escapeSql

NumberUtils 数字工具类

创建数字：createXXX  创建Integer,Float,Double,Number,BigDecimal,BigInteger等数字
字符转数字：toXXX     字符串转数字：Byte,Double,Float,Int,Long,Short
判断是否数字：isDigits/isNumber
其他方法：compare,max,min,

ArrayUtils 数组工具类

添加移除:add,addAll，remove,removeElement,
拷贝：clone
判断：contains,isEmpty,isNotEmpty,isEquals,isSameLength,
其他：getLength,indexOf,lastIndexOf,nullToEmpty,reverse,subArray,
转换：toMap,toObject,toPrimitive,toString

RandomUtils 随机数工具类

nextBoolean/nextInt/nextLong/nextFloat/nextDouble

RandomStringUtils 随机字符串工具类

random/randomNumeric/randomAlphabetic/randomAscii

DateUtils 日期工具类

说明:XXX表示milisecends,seconds,minutes,hours,days,weeks,months,years
时间加减：add/addXXX 
时间设置: setXXX 
获取片段: getFragmentInXXX    获取date的1月1日0点0分0秒到指定时间的片段值
判断： isSameDay/isSameInstant/isSameLocalTime
转换： parseDate/parseDateStrictly
取模： ceiling/round/truncate
时间段：iterator   注意rangeStyle=1到4表示周范围以及偏移，5和6表示月偏移

DateFormatUtils时间格式化

格式化：format/formatUTC

DurationFormatUtils时间段格式化

formatDuration/formatDurationHMS/formatDurationISO
formatPeriod/formatPeriodISO
formatDurationWords

StopWatch 秒表

start/stop/suspend/split/resume/reset/unsplit
getSplitTime/getStartTime/getTime/
toSplitString/toString

EnumUtils 枚举工具类

getEnum/getEnumIgnoreCase/getEnumList/getEnumMap
iterator

2、java反射工具类

ClassUtils 类工具

获取： 
    1、类和接口 ：getClass/getAllInterfaces/getAllSuperclasses/getShortClassName
    2、包：getPackageName/getPackageCanonicalName
    3、方法：getPublicMethod
转换：
    1、toClass/convertClassesToClassNames/convertClassNamesToClasses/
    2、primitivesToWrappers/primitiveToWrapper/wrappersToPrimitives/wrapperToPrimitive
判断：isAssignable/isInnerClass

MethodUtils

getAccessibleMethod/getMatchingAccessibleMethod
invokeMethod/invokeStaticMethod/invokeExactMethod/invokeExactStaticMethod

FieldUtils 字段工具类

getField/readField/writeField
getDeclaredField/readDeclaredField/writeDeclaredField
readDeclaredStaticField/readStaticField/writeDeclaredStaticField/writeStaticField

ConstructorUtils

getAccessibleConstructor/getMatchingAccessibleConstructor
invokeConstructor/invokeExactConstructor

ObjectUtils 对象工具类

max/min/toString/identityToString/appendIdentityToString/defaultIfNull

SystemUtils 系统属性工具类

getJavaHome/getJavaIoTmpDir/getJavaVersion/getUserDir/getUserHome/
isJavaAwtHeadless/isJavaVersionAtLeast

LocaleUtils 本地工具类

availableLocaleList/availableLocaleSet
countriesByLanguage
localeLookupList/toLocale/isAvailableLocale/languagesByCountry

SerializationUtils 序列化工具类

clone/deserialize/serialize

二、commons-collecions包

CollectionUtils 集合工具类

添加/删除:addAll/addIgnoreNull/retainAll/removeAll/
获取：
	find/get/containsAny/index/size/sizeIsEmpty/select/selectRejected/subtract
	typedCollection
判断： 
	isEmpty/isNotEmpty/isFull/exists/isEqualCollection/
	isSubCollection/isProperSubCollection 
转换： 
	collect/transform/transformedCollection/predicatedCollection
	unmodifiableCollection/synchronizedCollection 
计算：cardinality/countMatches/maxSize
过滤：filter
集合：intersection/union/disjunction  交集，并集，差集
其他操作：
   reverseArray  翻转  forAllDo 给每个元素执行闭包
   getCardinalityMap 转成Map,key是元素，value是次数

ListUtils-List工具类

判断： isEqualList
集合：intersection/sum/union/retainAll 交集，并集，合集，差集
操作：removeAll/hashCodeForList
子集： typedList/subtract/fixedSizeList
转换处理：synchronizedList/unmodifiableList/predicatedList/transformedList/lazyList

SetUtils-Set集合工具类

判断：isEqualSet
转换处理：
		transformedSet/transformedSortedSet/predicatedSet/predicatedSortedSet
		unmodifiableSet/synchronizedSet/synchronizedSortedSet
		orderedSet/typedSet/typedSortedSet
操作：hashCodeForSet

MapUtils-Map工具类

获取：getObject/getString/getXXX/getXXXValue  获取指定类型值，getXXXValue 如果没有值则默认值
子集：fixedSizeMap/fixedSizeSortedMap/typedMap/typedSortedMap
判断：isEmpty/isNotEmpty
转换：
	predicatedMap/predicatedSortedMap/transformedMap/transformedSortedMap/
	synchronizedMap/synchronizedSortedMap/
	unmodifiableMap/unmodifiableSortedMap/multiValueMap/orderedMap
	toMap/toProperties/lazyMap/lazySortedMap
添加移除：safeAddToMap/putAll
其他操作：invertMap/debugPrint/verbosePrint

其他工具类

MultiKey - 为Map定制的多Key

 Map map = new HashMap();
 MultiKey multiKey = new MultiKey(key, locale);
 map.put(multiKey, localizedText);

 // later retireve the localized text
 MultiKey multiKey = new MultiKey(key, locale);
 String localizedText = (String) map.get(multiKey);
 主要方法： getKey,getKeys,size

函数是编程类

// 预处理函数
AllPredicate/AndPredicate/AnyPredicate/UniquePredicate/NonePredicate/IdentityPredicate
EqualPredicate/FalsePredicate/TruePredicate/ExceptionPredicate
NullPredicate/OnePredicate/OrPredicate/InstanceofPredicate
TransformedPredicate/TransformerPredicate/NullIsFalsePredicate/NullIsTruePredicate
NotNullPredicate
NotPredicate
//闭包函数
ChainedClosure/ExceptionClosure/WhileClosure/ForClosure/IfClosure/NOPClosure
TransformerClosure/SwitchClosure/NullIsExceptionPredicate
//转换处理
ChainedTransformer/CloneTransformer/ClosureTransformer/ConstantTransformer
ExceptionTransformer/FactoryTransformer/MapTransformer/InstantiateTransformer
NOPTransformer/PredicateTransformer/StringValueTransformer/SwitchTransformer
InvokerTransformer
//工厂
ConstantFactory/ExceptionFactory/InstantiateFactory/PrototypeFactory

三、commons-io 包

FileUtils 文件操作工具类

文件夹操作： 
 copyDirectory/deleteDirectory/cleanDirectory/getTempDirectory/getTempDirectoryPath
 moveDirectory/moveDirectoryToDirectory/moveFileToDirectory/moveToDirectory
 forceMkdir/getUserDirectory/getUserDirectoryPath
文件操作：
	touch/copyFile/copyURLToFile/moveFile/deleteQuietly/forceDelete/forceDeleteOnExit
	toFile/toFiles/toURLs
	isFileNewer/isFileOlder
	readLines/readFileToByteArray/readFileToString/lineIterator/openOutputStream
	write/writeLines/writeByteArrayToFile/writeStringToFile/openInputStream
其他操作：
    iterateFiles/listFiles/contentEquals/sizeOf/sizeOfDirectory

IOUtils 流操作工具类

读操作：lineIterator/read/readLines
写操作：write/writeLines
转换： toInputStream/toBufferedInputStream/toByteArray/toCharArray/toString
其他操作：copy/copyLarge/contentEquals/skip/skipFully/closeQuietly

FilenameUtils 文件名工具类

获取：
	getName/getBaseName/getPrefix/getPrefixLength/getExtension
	getPath/getFullPath/getFullPathNoEndSeparator/getPathNoEndSeparator
判断：
	isExtension/equals/equalsNormalized/equalsOnSystem
其他操作：
	removeExtension/indexOfExtension
	separatorsToSystem/separatorsToUnix/separatorsToWindows
	indexOfLastSeparator

其他工具类

文件比较器：
    CompositeFileComparator/DefaultFileComparator/DirectoryFileComparator
    ExtensionFileComparator/LastModifiedFileComparator/NameFileComparator
    PathFileComparator/PathFileComparator
文件过滤器：
    AgeFileFilter/AndFileFilter/CanReadFileFilter/CanWriteFileFilter
    DelegateFileFilter/DirectoryFileFilter/EmptyFileFilter/FalseFileFilter/FileFileFilter
    FileFilterUtils/HiddenFileFilter/MagicNumberFileFilter/NameFileFilter/NotFileFilter
    OrFileFilter/PrefixFileFilter/RegexFileFilter/SizeFileFilter/SuffixFileFilter
    TrueFileFilter/WildcardFileFilter/WildcardFilter

四、commons-beanutils包

BeanUtils/BeanUtilsBean

拷贝： cloneBean/copyProperties/copyProperty
获取：getArrayProperty/getSimpleProperty/getProperty
其他操作：setProperty设置属性 populate将Bean设置到Map中  describe将Bean转成Map   

PropertyUtils类

判断：isReadable/isWriteable
获取：
	getProperty/getSimpleProperty/getPropertyType 
	getReadMethod/getWriteMethod/getIndexedProperty/setIndexedProperty
	getMappedProperty/setMappedProperty/getNestedProperty/setNestedProperty  
	getPropertyDescriptor/getPropertyEditorClass
拷贝和设置：copyProperties/setProperty/setSimpleProperty /clearDescriptors       

ConstructorUtils

getAccessibleConstructor/invokeConstructor/invokeExactConstructor 

ConvertUtils

设置：setDefaultBoolean/setDefaultByte/setDefaultCharacter/setDefaultDouble/
	setDefaultFloat/setDefaultInteger/setDefaultLong/setDefaultShort/
获取：getDefaultBoolean/getDefaultByte/getDefaultCharacter/getDefaultDouble/getDefaultFloat/
	getDefaultInteger/getDefaultLong/getDefaultShort/
转换：convert/
其他：deregister/lookup/register/primitiveToWrapper/

MethodUtils

获取：getAccessibleMethod/getMatchingAccessibleMethod/getPrimitiveType/getPrimitiveWrapper
其他：invokeExactMethod/invokeMethod/isAssignmentCompatible/toNonPrimitiveClass