排名前 16 的 Java 工具类

org.apache.commons.io.IOUtils
org.apache.commons.io.FileUtils
org.apache.commons.lang.StringUtils
org.apache.http.util.EntityUtils
org.apache.commons.lang3.StringUtils
org.apache.commons.io.FilenameUtils
org.springframework.util.StringUtils
org.apache.commons.lang.ArrayUtils
org.apache.commons.lang.StringEscapeUtils
org.apache.http.client.utils.URLEncodedUtils
org.apache.commons.codec.digest.DigestUtils
org.apache.commons.collections.CollectionUtils
org.apache.commons.lang3.ArrayUtils
org.apache.commons.beanutils.PropertyUtils
org.apache.commons.lang3.StringEscapeUtils
org.apache.commons.beanutils.BeanUtils

• 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()  
EMPTY  
trimToNull()  
replace()  

• org.apache.http.util.EntityUtils

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

• org.apache.commons.lang3.StringUtils

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

• 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_ARRAY  
subarray()  
indexOf()  
isEquals()  
toObject()  

• org.apache.commons.lang.StringEscapeUtils

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

• org.apache.http.client.utils.URLEncodedUtils

format()  
parse()  

• 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()  

• org.apache.commons.lang3.ArrayUtils

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

• org.apache.commons.beanutils.PropertyUtils

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

• org.apache.commons.lang3.StringEscapeUtils

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

• org.apache.commons.beanutils.BeanUtils

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