mikuhop / java-util

一些常见的方法

java-util

一些常见的方法

• 【强制】避免用Apache Beanutils进行属性的copy，性能比较差。
• 说明：Apache BeanUtils性能较差，可以使用其他方案比如Spring BeanUtils, Cglib BeanCopier，注意均是浅拷贝。

apache-common 包中常见util

* IOUtils
* StringUtils
* RandomStringUtils
* FileUtils
* BeanUtils
* PropertyUtils
* ClassUtils
* SerializationUtils
* NumberUtils
* MethodUtils
* DateUtils

以下列表是通过分析50K的开源项目得出来的。

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 ( )