在Java中,实用程序类是定义一组执行通用功能的方法的类。
这篇文章展示了最常用的Java实用工具类及其最常用的方法。类列表及其方法列表均按受欢迎程度排序。数据基于从GitHub随机选择的50,000个开源Java项目。
希望您可以通过浏览列表来了解已经提供和流行的功能的一些想法,以使您知道不需要自己实现。这些方法的名称通常指示它们的作用。如果方法名称不够直观,您还可以查看其他开发人员如何在其开源项目中使用它们。
1 org.apache.commons.io.IOUtils
1 2 3 4 5 6 7 8 9 10
| closeQuietly() toString() copy() toByteArray() write() toInputStream() readLines() copyLarge() lineIterator() readFully()
|
2 org.apache.commons.io.FileUtils
1 2 3 4 5 6 7 8 9 10
| deleteDirectory() readFileToString() deleteQuietly() copyFile() writeStringToFile() forceMkdir() write() listFiles() copyDirectory() forceDelete()
|
3 org.apache.commons.lang.StringUtils
1 2 3 4 5 6 7 8 9 10
| isBlank() isNotBlank() isEmpty() isNotEmpty() equals() join() split() EMPTY trimToNull() replace()
|
4 org.apache.http.util.EntityUtils
1 2 3 4 5
| toString() consume() toByteArray() consumeQuietly() getContentCharSet()
|
5 org.apache.commons.lang3.StringUtils
1 2 3 4 5 6 7 8 9 10
| isBlank() isNotBlank() isEmpty() isNotEmpty() join() equals() split() EMPTY replace() capitalize()
|
6 org.apache.commons.io.FilenameUtils
1 2 3 4 5 6 7 8 9 10
| getExtension() getBaseName() getName() concat() removeExtension() normalize() wildcardMatch() separatorsToUnix() getFullPath() isExtension()
|
7 org.springframework.util.StringUtils
1 2 3 4 5 6 7 8 9 10
| hasText() hasLength() isEmpty() commaDelimitedListToStringArray() collectionToDelimitedString() replace() delimitedListToStringArray() uncapitalize() collectionToCommaDelimitedString() tokenizeToStringArray()
|
8 org.apache.commons.lang.ArrayUtils
1 2 3 4 5 6 7 8 9 10
| contains() addAll() clone() isEmpty() add() EMPTY_BYTE_ARRAY subarray() indexOf() isEquals() toObject()
|
9 org.apache.commons.lang.StringEscapeUtils
1 2 3 4 5 6 7 8 9
| escapeHtml() unescapeHtml() escapeXml() escapeSql() unescapeJava() escapeJava() escapeJavaScript() unescapeXml() unescapeJavaScript()
|
10 org.apache.http.client.utils.URLEncodedUtils
11 org.apache.commons.codec.digest.DigestUtils
1 2 3 4 5 6 7 8
| md5Hex() shaHex() sha256Hex() sha1Hex() sha() md5() sha512Hex() sha1()
|
12 org.apache.commons.collections.CollectionUtils
1 2 3 4 5 6 7 8 9 10 11
| isEmpty() isNotEmpty() select () transform() filter() find() collect() forAllDo() addAll() isEqualCollection()
|
13 org.apache.commons.lang3.ArrayUtils
1 2 3 4 5 6 7 8 9 10
| contains() isEmpty() isNotEmpty() add() clone() addAll() subarray() indexOf() EMPTY_OBJECT_ARRAY EMPTY_STRING_ARRAY
|
14 org.apache.commons.beanutils.PropertyUtils
1 2 3 4 5 6 7 8 9 10
| getProperty() setProperty() getPropertyDescriptors() isReadable() copyProperties() getPropertyDescriptor() getSimpleProperty() isWriteable() setSimpleProperty() getPropertyType()
|
15 org.apache.commons.lang3.StringEscapeUtils
1 2 3 4 5 6 7 8 9
| unescapeHtml4() escapeHtml4() escapeXml() unescapeXml() escapeJava() escapeEcmaScript() unescapeJava() escapeJson() escapeXml10()
|
16 org.apache.commons.beanutils.BeanUtils
1 2 3 4 5 6 7
| copyProperties() getProperty() setProperty() describe() populate() copyProperty() cloneBean()
|
From