Top 16 Java 应用类 － 这些功能再也不用自己写了

Java中有许多应用类，这些类定义静态方法可以解决很多常见的问题。下面是通过5万个开源项目统计得到的最热门的16个应用类。 类按热门程序排列，类的方法也是按热门程序排序。

 

浏览这个类可以看看有哪些功能不用再自己写了。 非常有用。 点击尾部阅读原文链接可以看到具体使用的示例。 

 

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 ( )

 

* The utility classes from android are excluded since they are designed for Android apps. If you want to see more details, you can search "utils" in the search portal:http://www.programcreek.com/java-api-examples/index.php. If the name of a utility class does not contain "utils", the class is not selected.

 

Also org.apache.commons.lang is the old version of import org.apache.commons.lang3.