1 org.apache.commons.io.IOUtils

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

2 org.apache.commons.io.FileUtils
deleteDirectory()
readFileToString()
deleteQuietly()
copyFile()
writeStringToFile()
forceMkdir()
write()
listFiles()
copyDirectory()
forceDelete()

3 org.apache.commons.lang.StringUtils

isBlank()  
isNotBlank()  
isEmpty()  
isNotEmpty()  
equals()  
join()  
split()  
EMPTY  
trimToNull()  
replace()  

4 org.apache.http.util.EntityUtils

toString()  
consume()  
toByteArray()  
consumeQuietly()  
getContentCharSet()  

5 org.apache.commons.lang3.StringUtils

isBlank()  
isNotBlank()  
isEmpty()  
isNotEmpty()  
join()  
equals()  
split()  
EMPTY  
replace()  
capitalize()  

6 org.apache.commons.io.FilenameUtils

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

7 org.springframework.util.StringUtils

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

8 org.apache.commons.lang.ArrayUtils

contains()  
addAll()  
clone()  
isEmpty()  
add()  
EMPTY_BYTE_ARRAY  
subarray()  
indexOf()  
isEquals()  
toObject() 

9 org.apache.commons.lang.StringEscapeUtils

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

10 org.apache.http.client.utils.URLEncodedUtils

format()  
parse() 

11 org.apache.commons.codec.digest.DigestUtils

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

12 org.apache.commons.collections.CollectionUtils

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

13 org.apache.commons.lang3.ArrayUtils

contains()  
isEmpty()  
isNotEmpty()  
add()  
clone()  
addAll()  
subarray()  
indexOf()  
EMPTY_OBJECT_ARRAY  
EMPTY_STRING_ARRAY 

14 org.apache.commons.beanutils.PropertyUtils

getProperty()  
setProperty()  
getPropertyDescriptors()  
isReadable()  
copyProperties()  
getPropertyDescriptor()  
getSimpleProperty()  
isWriteable()  
setSimpleProperty()  
getPropertyType() 

15 org.apache.commons.lang3.StringEscapeUtils

unescapeHtml4()  
escapeHtml4()  
escapeXml()  
unescapeXml()  
escapeJava()  
escapeEcmaScript()  
unescapeJava()  
escapeJson()  
escapeXml10()  

16 org.apache.commons.beanutils.BeanUtils

copyProperties()  
getProperty()  
setProperty()  
describe()  
populate()  
copyProperty()  
cloneBean()