Explain each function of the spring jar

 Spring.jaris a single jar package that contains a full publishing module. But not including Mock.jar, Aspects.jar, Spring-portlet.jar, and Spring-hibernate2.jar.

Spring-src.zipIs all the source code compression package.

In addition to the Spring.jar file, Spring includes 21 other separate jar packages, each containing a corresponding Spring component, which allows the user to choose to assemble their own jar packages, rather than having to introduce all of the Spring.jar's class files.

Spring-core.jar
This jar file contains the basic core tool classes of the spring framework. The other components of Spring use the classes in this package, which is the basic core of the others, and of course you can use them in your own application system.
Externally dependent Commons Logging, (log4j).

Spring-beans.jar
This jar file is used by all applications and contains all classes that access the configuration file, create and manage beans, and perform inversion of control/dependency injection (IOC/DI) operations. If the application requires only basic Ioc/di support, the introduction of Spring-core.jar and Spring-beans.jar files is possible.
Externally dependent Spring-core, (CGLIB).

Spring-aop.jar
This jar file contains the class and source-level metadata support required to use spring's AOP features in your app. Using the spring features based on AOP, such as declarative transaction management (declarative Transaction Management), also include this jar package in your application.
Externally dependent Spring-core, (Spring-beans,aop Alliance, Cglib,commons Attributes).

Spring-context.jar
This jar file provides a number of extensions to the spring core. You can find all the classes you need to use the Spring ApplicationContext feature, Jdni all the classes you need, instrumentation components, and related classes for validating validation.
Externally dependent Spring-beans, (SPRING-AOP).

Spring-dao.jar
This jar file contains all the classes of Spring DAO, spring Transaction for data access. In order to use declarative transaction support, you also need to include Spring-aop.jar in your own application.
Externally dependent Spring-core, (SPRING-AOP, Spring-context, JTA API).

Spring-jdbc.jar
This jar file contains all the classes that encapsulate spring's JDBC data access.
Externally dependent Spring-beans,spring-dao.

Spring-support.jar
This jar file contains classes that support UI templates (Velocity,freemarker,jasperreports), mail services, scripting Services (JRuby), cache caches (EHCache), Task Scheduler scheduling (Uartz).
Externally dependent Spring-context, (SPRING-JDBC, Velocity, Freemarker, JasperReports, BSH, Groovy, JRuby, Quartz, EHCache)

Spring-web.jar
This jar file contains the core classes required to use the spring framework when developing Web applications, including classes that automatically load Web application Context features, Struts and JSF integration classes, File upload support classes, Filter classes, and a large number of tool helper classes.
Externally dependent Spring-context, Servlet API, (JSP API, JSTL, Commons FileUpload, COS).

Spring-webmvc.jar
This jar file contains all the classes related to the Spring MVC framework. Includes framework for SERVLETS,WEB MVC Framework, controller and view support. Of course, if your app uses a stand-alone MVC framework, you don't need any classes in this jar file.
Externally dependent Spring-web, (spring-support,tiles,itext,poi).

Spring-portlet.jar
Spring's own implementation of a framework similar to spring MVC. Includes an MVC framework and controller.
External dependent spring-web, Portlet API, (SPRING-WEBMVC).

Spring-struts.jar
Struts framework support makes it easier and easier to integrate the struts framework.
Externally dependent spring-web,struts.

Spring-remoting.jar
This jar file contains classes that support EJBS, remotely invoke remoting (RMI, Hessian, Burlap, Http Invoker, Jax-RPC).
External dependent SPRING-AOP, (SPRING-CONTEXT,SPRING-WEB,HESSIAN,BURLAP,JAX-RPC,EJB API).

Spring-jmx.jar
This jar package provides support classes for JMX 1.0/1.2.
Externally dependent SPRING-BEANS,SPRING-AOP, JMX API.

Spring-jms.jar
This jar package provides support classes for JMS 1.0.2/1.1.
Externally dependent SPRING-BEANS,SPRING-DAO,JMS API.

Spring-jca.jar
Support for JCA 1.0.
Externally dependent Spring-beans,spring-dao, JCA API.

Spring-jdo.jar
Support for the JDO 1.0/2.0.
Externally dependent SPRING-JDBC, JDO API, (spring-web).

Spring-jpa.jar
Support for JPA 1.0.
Externally dependent SPRING-JDBC, JPA API, (spring-web).

Spring-hibernate2.jar
Support for Hibernate 2.1 is not recommended for use.
Externally dependent Spring-jdbc,hibernate2, (spring-web).

Spring-hibernate3.jar
Support for Hibernate 3.0/3.1/3.2.
Externally dependent spring-jdbc,hibernate3, (spring-web).

Spring-toplink.jar
Support for the TopLink framework.
Externally dependent Spring-jdbc,toplink.

Spring-ibatis.jar
Support for Ibatis SQL maps.
Externally dependent Spring-jdbc,ibatis SQL Maps.

The other two packages.

Spring-mock.jar
This jar file contains the spring set of mock classes to aid in the testing of the application. The Spring test suite uses a large number of these mock classes, which makes testing easier. Simulating the HttpServletRequest and HttpServletResponse classes is convenient for Web application unit testing. And it provides support for JUnit.
Externally dependent Spring-core.

Spring-aspects.jar
Provides support for ASPECTJ so that aspect-oriented features can be easily integrated into the IDE, such as Eclipse AJDT.
External dependencies.

WEAVER JARS (dist/weavers) description.

Spring-agent.jar
Spring's instrumentationsavingagent (for Instrumentationloadtimeweaver), a device agent package, can refer to JDK1.5 's instrumentation features for more information.
External dependent none (for use at JVM Startup: "-javaagent:spring-agent.jar").

Spring-tomcat-weaver.jar
Extend the ClassLoader of Tomcat so that it can use the instrumentation (device) class.
External dependent none (for deployment into Tomcat ' s "server/lib" directory).