當咱們想要本身開發一個工具時先在網上找找有沒有大廠已經幫咱們實現好的工具類。畢竟重複造輪子不是什麼好事~html
Apache Commons是一個很是有用的工具包,爲解決各類實際的問題提供了通用現成的代碼,不須要咱們程序員再重複造輪子。關於這個類庫的詳細介紹能夠訪問官網介紹。下面表格列出了部分的工具包。咱們平時開發過程當中能夠根據本身的須要挑選合適的工具包。java
Components | Description | Latest Version | Released |
---|---|---|---|
BCEL | Byte Code Engineering Library - analyze, create, and manipulate Java class files | 6.3.1 | 2019/3/24 |
BeanUtils | Easy-to-use wrappers around the Java reflection and introspection APIs. | 1.9.3 | 2016/9/26 |
BSF | Bean Scripting Framework - interface to scripting languages, including JSR-223 | 3.1 | 2010/6/24 |
Chain | Chain of Responsibility pattern implemention. | 1.2 | 2008/6/2 |
CLI | Command Line arguments parser. | 1.4 | 2017/3/9 |
Codec | General encoding/decoding algorithms (for example phonetic, base64, URL). | 1.12 | 2019/2/16 |
Collections | Extends or augments the Java Collections Framework. | 4.3 | 2019/2/5 |
Compress | Defines an API for working with tar, zip and bzip2 files. | 1.18 | 2018/8/16 |
Configuration | Reading of configuration/preferences files in various formats. | 2.4 | 2018/10/29 |
Crypto | A cryptographic library optimized with AES-NI wrapping Openssl or JCE algorithm implementations. | 1.0.0 | 2016/7/22 |
CSV | Component for reading and writing comma separated value files. | 1.6 | 2018/9/25 |
Daemon | Alternative invocation mechanism for unix-daemon-like java code. | 1.0.15 | 2013/4/3 |
DBCP | Database connection pooling services. | 2.6.0 | 2019/2/19 |
DbUtils | JDBC helper library. | 1.7 | 2017/7/20 |
Digester | XML-to-Java-object mapping utility. | 3.2 | 2011/12/13 |
Library for sending e-mail from Java. | 1.5 | 2017/8/1 | |
Exec | API for dealing with external process execution and environment management in Java. | 1.3 | 2014/11/6 |
FileUpload | File upload capability for your servlets and web applications. | 1.4 | 2019/1/16 |
Functor | A functor is a function that can be manipulated as an object, or an object representing a single, generic function. | 1 | 2011-??-?? |
Geometry | Space and coordinates. | 1 | 2018-??-?? |
Imaging (previously called Sanselan) | A pure-Java image library. | 0.97-incubator | 2009/2/20 |
IO | Collection of I/O utilities. | 2.6 | 2017/10/15 |
JCI | Java Compiler Interface | 1.1 | 2013/10/14 |
JCS | Java Caching System | 2.2,1 | 2018/8/23 |
Jelly | XML based scripting and processing engine. | 1.0.1 | 2017/9/27 |
Jexl | Expression language which extends the Expression Language of the JSTL. | 3.1 | 2017/4/14 |
JXPath | Utilities for manipulating Java Beans using the XPath syntax. | 1.3 | 2008/8/14 |
Lang | Provides extra functionality for classes in java.lang. | 3.9 | 2019/4/15 |
Logging | Wrapper around a variety of logging API implementations. | 1.2 | 2014/7/11 |
Math | Lightweight, self-contained mathematics and statistics components. | 3.5 | 2015/4/17 |
Net | Collection of network utilities and protocol implementations. | 3.6 | 2017/2/15 |
Numbers | Number types (complex, quaternion, fraction) and utilities (arrays, combinatorics). | 1 | 2017-??-?? |
OGNL | An Object-Graph Navigation Language | 4 | 2013-??-?? |
Pool | Generic object pooling component. | 2.6.2 | 2019/4/11 |
Proxy | Library for creating dynamic proxies. | 1 | 2008/2/28 |
RDF | Common implementation of RDF 1.1 that could be implemented by systems on the JVM. | 0.3.0-incubating | 2016/11/15 |
RNG | Implementations of random numbers generators. | 1.2 | 2018/12/12 |
SCXML | An implementation of the State Chart XML specification aimed at creating and maintaining a Java SCXML engine.It is capable of executing a state machine defined using a SCXML document, and abstracts out the environment interfaces. | 0.9 | 2008/12/1 |
Statistics | Statistics. | 0.1 | ????-??-?? |
Text | Apache Commons Text is a library focused on algorithms working on strings. | 1.6 | 2018/10/16 |
Validator | Framework to define validators and validation rules in an xml file. | 1.6 | 2017/2/21 |
VFS | Virtual File System component for treating files, FTP, SMB, ZIP and such like as a single logical file system. | 2.3 | 2019/2/4 |
Weaver | Provides an easy way to enhance (weave) compiled bytecode. | 2 | 2018/9/7 |
除了上面表格中的工具包,Apache Common項目還包括如下幾個工具包,其中的http-client是咱們平時很是經常使用的。程序員
Guava工程包含了若干被Google的 Java項目普遍依賴 的核心庫,例如:集合 [collections] 、緩存 [caching] 、原生類型支持 [primitives support] 、併發庫 [concurrency libraries] 、通用註解 [common annotations] 、字符串處理 [string processing] 、I/O 等等。下面列出Guava工具包中的經常使用功能點,以便須要的時候查閱使用。web
Guava對JDK集合的擴展,這是Guava最成熟和爲人所知的部分spring
Guava Cache:本地緩存實現,支持多種緩存過時策略。apache
Guava的函數式支持能夠顯著簡化代碼,但請謹慎使用它。編程
強大而簡單的抽象,讓編寫正確的併發代碼更簡單緩存
很是有用的字符串工具,包括分割、鏈接、填充等操做服務器
擴展 JDK 未提供的原生類型(如int、char)操做, 包括某些類型的無符號形式網絡
可比較類型的區間API,包括連續和離散類型
簡化I/O尤爲是I/O流和文件的操做,針對Java5和6版本
提供比Object.hashCode()更復雜的散列實現,並提供布魯姆過濾器的實現
發佈-訂閱模式的組件通訊,但組件不須要顯式地註冊到其餘組件中
優化的、充分測試的數學工具類
Guava 的 Java 反射機制工具類
參考下面博客:
http://www.javashuo.com/article/p-fiabltva-a.html
https://www.jb51.net/article/125424.htm