本文介绍了最常用的Java实用程序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中随机抽取的50,000个开源Java项目。希望浏览该列表可以让您对已经提供的和流行的功能有一些想法，这样您就知道您不需要自己实现它们。这些方法的名称通常表明它们的作用。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他们的开源项目中使用它们。1.org.apache.commons.io.IOUtilscloseQuietly()toString()copy()toByteArray()write()toInputStream()readLines()copyLarge()lineIterator()readFully()2.org.apache.commons.io。FileUtilsdeleteDirectory()readFileToString()deleteQuietly()copyFile()writeStringToFile()forceMkdir()write()listFiles()copyDirectory()forceDelete()3.org.apache.commons.lang.StringUtilsisBlank()isNotBlank()isEmpty()isNotEmpty()equals()join()split()EMPTYtrimToNull()replace()4.org.apache.http.util.EntityUtilstoString()consume()toByteArray()consumeQuietly()getContentCharSet()5.org.apache.commons。lang3.StringUtilsisBlank()isNotBlank()isEmpty()isNotEmpty()join()equals()split()EMPTYreplace()capitalize()6.org.apache.commons.io.FilenameUtilsgetExtension()getBaseName()getName()concat()removeExtension()normalize()wildcardMatch()separatorsToUnix()getFullPath()isExtension()7.org.springframework.util.StringUtilshasText()hasLength()isEmpty()commaDelimitedListToStringArray()collectionToDelimitedString()replace()delimitedListToStringArray()uncapitalize()collectionToCommaDelimitedString()tokenizeToStringArray()8.org.apache.commons.lang.ArrayUtilscontains()addAll()clone()isEmpty()add()EMPTY_BYTE_ARRAY子数组()indexOf()isEquals()toObject()9.org.apache.commons.lang.StringEscapeUtilsescapeHtml()unescapeHtml()escapeXml()escapeSql()unescapeJava()escapeJava()escapeJavaScript()unescapeXml()unescapeJavaScript()10.org.apache.http。client.utils.URLEncodedUtilsformat()parse()11.org.apache.commons.codec.digest.DigestUtilsmd5Hex()shaHex()sha256Hex()sha1Hex()sha()md5()sha512Hex()sha1()12.org。apache.commons.collections.CollectionUtilsisEmpty()isNotEmpty()select()transform()filter()find()collect()forAllDo()addAll()isEqualCollection()13.org.apache.commons.lang3.ArrayUtilscontains()isEmpty()isNotEmpty()add()clone()addAll()subarray()indexOf()EMPTY_OBJECT_ARRAYEMPTY_STRING_ARRAY14.org.apache.commons.beanutils.PropertyUtilsgetProperty()setProperty()getPropertyDescriptors()isReadable()copyProperties()getPropertyDescriptor()getSimpleProperty()isWriteable()setSimpleProperty()getPropertyType()15.org.apache.commons.lang3.StringEscapeUtilsunescapeHtml4()escapeHtml4()escapeXml()unescapeXml()escapeJava()escapeEcmaScript()unescapeJava()escapeJson()escapeXml10()16.org.apache.commons.beanutils.BeanUtilscopyProperties()getProperty()setProperty()describe()populate()copyProperty()cloneBean()
