排名前 16 的 Java 工具類，哪個你沒用過？

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這篇文章展示了最常用的Java實用工具類及其最常用的方法。類列表及其方法列表均按受歡迎程度排序。數(shù)據(jù)基于從GitHub隨機選擇的50,000個開源Java項目。

希望您可以通過瀏覽列表來了解已經(jīng)提供和流行的功能的一些想法，以使您知道不需要自己實現(xiàn)。這些方法的名稱通常指示它們的作用。如果方法名稱不夠直觀，您還可以查看其他開發(fā)人員如何在其開源項目中使用它們。

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()??