Apache Common - The Commons Proper(Apache Commons 正式项目)

组件AttributesRuntime API to metadata attributes such as doclet tags. 
元数据属性（如文件标签）的运行时APIBCELByte Code Engineering Library - analyze, create, and manipulate Java class files
字节码工程库 - 分析，创建和操作 Java Class文件BeanUtilsEasy-to-use wrappers around the Java reflection and introspection APIs.
易于使用的包装器API的Java反射和内省BetwixtServices for mapping JavaBeans to XML documents, and vice versa.
在服务映射的JavaBeans到XML文档，反之亦然BSFBean Scripting Framework - interface to scripting languages, including JSR-223
Bean脚本框架 -  包含JSR-223 在内的脚本语言的接口ChainChain of Responsibility pattern implemention.
责任链模式的实现CLICommand Line arguments parser.
命令行参数分析器CodecGeneral encoding/decoding algorithms (for example phonetic, base64, URL).
通用编码/解码算法（例如语音，Base64，URL）CollectionsExtends or augments the Java Collections Framework.
扩展或增强Java集合框架CompressDefines an API for working with tar, zip and bzip2 files.
定义了一组API用于处理tar，zip和bzip2文件ConfigurationReading of configuration/preferences files in various formats.
各种格式的 configuration/preferences 文件的读取CSVComponent for reading and writing comma separated value files.
读写CSV（逗号分隔值文件）的组件DaemonAlternative invocation mechanism for unix-daemon-like java code.
UNIX的守护进程daemon的Java版本替代调用机制DBCPDatabase connection pooling services.
数据库连接池服务DbUtilsJDBC helper library.
JDBC帮助库DigesterXML-to-Java-object mapping utility.
XML到Java对象映射工具DiscoveryTools for locating resources by mapping service/reference names 
to resource names.
通过对资源名称映射服务/引用名称定位资源的工具ELInterpreter for the Expression Language defined by the JSP 2.0 specification.
JSP 2规范中定义的表达式语言的解释器EmailLibrary for sending e-mail from Java.
从Java发送电子邮件的电子邮件库ExecAPI for dealing with external process execution and environment management in Java.
用Java处理外部流程执行和环境管理的APIFileUploadFile upload capability for your servlets and web applications.
为你的Servlet的Web应用程序添加上传文件的能力FunctorA functor is a function that can be manipulated as an object, or an object representing a single, generic function.
一个仿函数是可以作为一个对象操作的函数，或者说是一个单一的，通用的函数的对象Imaging              (Sanselan)A pure-Java image library.
纯Java的图像库IOCollection of I/O utilities.
I/O工具集合JCIJava Compiler Interface
Java编译器接口 JCSJava Caching System
Java缓存系统JellyXML based scripting and processing engine.
基于XML的脚本和处理引擎JexlExpression language which extends the Expression Language of the JSTL.
表达式语言，它扩展了JSTL表达式语言JXPathUtilities for manipulating Java Beans using the XPath syntax.
使用XPath语法操纵Java Beans的工具LangProvides extra functionality for classes in java.lang.
为java.lang中的类提供了额外的功能LauncherCross platform Java application launcher.
跨平台的Java应用程序 launcherLoggingWrapper around a variety of logging API implementations.
对各种日志API实现的包装MathLightweight, self-contained mathematics and statistics components.
轻量级的，自包含的数学和统计组件ModelerMechanisms to create Model MBeans compatible with JMX specification.
建立JMX规范兼容的 Model MBeans 的机制NetCollection of network utilities and protocol implementations.
网络工具和协议实现的集合OGNLAn Object-Graph Navigation Language
OGNL对象图导航语言 PoolGeneric object pooling component.
通用对象池组件PrimitivesSmaller, faster and easier to work with types supporting Java primitive types.
小的，快速的，简单的处理对Java的原生类型支持ProxyLibrary for creating dynamic proxies.
用于创建动态代理的库SCXMLAn 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.
状态图XML的实现旨在创建和维护一个Java的SCXML引擎。
它是能够使用SCXML文档执行状态机定义，并抽象出环境接口TransactionImplementations for multi level locks,
transactional collections and transactional file access.
交易实现多级锁，事务集合和事务性文件访问ValidatorFramework to define validators and validation rules in an xml file.
框架在一个XML文件中定义的验证和验证规则VFSVirtual File System component for treating files, FTP, SMB, ZIP and such like as a single logical file system.
VFS虚拟文件系统组件，能将文件，FTP，SMB，ZIP等作为一个单一的逻辑文件系统处理WeaverProvides an easy way to enhance (weave) compiled bytecode.
提供一个简单的途径来增强（编织）编译字节码