最流行的java 工具类

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org.apache.commons.io.IOUtils

closeQuietly ( )toString ( )copy ( )toByteArray ( )write ( )toInputStream ( )readLines ( )copyLarge ( )lineIterator ( )readFully ( )

org.apache.commons.io.FileUtils

deleteDirectory ( )readFileToString ( )deleteQuietly ( )copyFile ( )writeStringToFile ( )forceMkdir ( )write ( )listFiles ( )copyDirectory ( )forceDelete ( )

org.apache.commons.lang.StringUtils

isBlank ( )isNotBlank ( )isEmpty ( )isNotEmpty ( )equals ( )join ( )split ( )EMPTYtrimToNull ( )replace ( )

org.apache.commons.io.FilenameUtils

getExtension ( )getBaseName ( )getName ( )concat ( )removeExtension ( )normalize ( )wildcardMatch ( )separatorsToUnix ( )getFullPath ( )isExtension ( )

org.springframework.util.StringUtils

hasText ( )hasLength ( )isEmpty ( )commaDelimitedListToStringArray ( )collectionToDelimitedString ( )replace ( )delimitedListToStringArray ( )uncapitalize ( )collectionToCommaDelimitedString ( )tokenizeToStringArray ( )

org.apache.commons.lang.ArrayUtils

contains ( )addAll ( )clone ( )isEmpty ( )add ( )EMPTY_BYTE_ARRAYsubarray ( )indexOf ( )isEquals ( )toObject ( )

org.apache.commons.lang.StringEscapeUtils

escapeHtml ( )unescapeHtml ( )escapeXml ( )escapeSql ( )unescapeJava ( )escapeJava ( )escapeJavaScript ( )unescapeXml ( )unescapeJavaScript ( )

org.apache.commons.codec.digest.DigestUtils

md5Hex ( )shaHex ( )sha256Hex ( )sha1Hex ( )sha ( )md5 ( )sha512Hex ( )sha1 ( )

org.apache.commons.collections.CollectionUtils

isEmpty ( )isNotEmpty ( )select ( )transform ( )filter ( )find ( )collect ( )forAllDo ( )addAll ( )isEqualCollection ( )

Joda-Time日期处理类

DateTimeLocalTime

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