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THE SPRING FRAMEWORK, release 1.0 (March 2004) ---------------------------------------------- http://www.springframework.org 1. INTRODUCTION Spring is a layered Java/J2EE application framework, based on code published in "Expert One-on-One J2EE Design and Development" by Rod Johnson (Wrox, 2002). Spring includes: * Powerful JavaBeans-based configuration management, applying Inversion-of-Control principles. This makes wiring up applications quick and easy. No more singletons littered throughout your codebase, no more arbitrary properties files: one consistent and elegant approach everywhere. This core bean factory can be used in any environment, from applets to J2EE containers. * Generic abstraction layer for transaction management, allowing for pluggable transaction managers, and making it easy to demarcate transactions without dealing with low-level issues. Generic strategies for JTA and a single JDBC DataSource are included. In contrast to plain JTA or EJB CMT, Spring's transaction support is not tied to J2EE environments. * JDBC abstraction layer that offers a meaningful exception hierarchy (no more pulling vendor codes out of SQLException), simplifies error handling, and greatly reduces the amount of code you'll need to write. You'll never need to write another finally block to use JDBC again. The JDBC-oriented exceptions comply to Spring's generic DAO exception hierarchy. * Integration with Hibernate, JDO, and iBATIS SQL Maps: in terms of resource holders, DAO implementation support, and transaction strategies. First-class Hibernate support with lots of IoC convenience features, addressing many typical Hibernate integration issues. All of these comply to Spring's generic transaction and DAO exception hierarchies. * AOP functionality, fully integrated into Spring configuration management. You can AOP-enable any object managed by Spring, adding aspects such as declarative transaction management. With Spring, you can have declarative transaction management without EJB... even without JTA, if you're using a single database in Tomcat or another web container without JTA support. * Flexible MVC web application framework, built on core Spring functionality. This framework is highly configurable via strategy interfaces, and accommodates multiple view technologies like JSP, Tiles, Velocity, FreeMarker, iText, and POI. Note that a Spring middle tier can easily be combined with a web tier based on any other web MVC framework, like Struts, WebWork, or Tapestry. You can use all of Spring's functionality in any J2EE server, and most of it also in non-managed environments. A central focus of Spring is to allow for reusable business and data access objects that are not tied to specific J2EE services. Such objects can be reused across J2EE environments (web or EJB), standalone applications, test environments, etc without any hassle. Spring has a layered architecture; all its functionality builds on lower levels. So you can e.g. use the JavaBeans configuration management without using the MVC framework or AOP support. But if you use the web MVC framework or AOP support, you'll find they build on the configuration framework, so you can apply your knowledge about it immediately. 2. RELEASE INFO The Spring Framework requires J2SE 1.3 and J2EE 1.3 (Servlet 2.3, JSP 1.2, JTA 1.0, EJB 2.0). J2SE 1.4 is required for building the framework. Note that J2EE 1.2 (Servlet 2.2, JSP 1.1) is good enough if not using Spring's web MVC or EJB support. Integration is provided with Log4J 1.2, CGLIB 1.0, Jakarta Commons Attributes, Hibernate 2.1, JDO 1.0, iBATIS SQL Maps 1.3/2.0, JAX-RPC 1.1, Caucho's Hessian and Burlap 2.1/3.0, Quartz 1.3, JSTL 1.0, Velocity 1.3, FreeMarker 2.3, Struts-Tiles 1.1, Jakarta Commons FileUpload, Jason Hunter's COS, etc. Release contents: * "src" contains the Java source files for the framework * "test" contains the Java source files for Spring's test suite * "dist" contains various Spring distribution JAR files * "lib" contains all third-party libraries needed for running the samples and/or building the framework * "docs" contains general documentation and API javadocs * "samples" contains demo applications and skeletons The "lib" directory is just included in the "-with-dependencies" download. Make sure to download this full distribution ZIP file if you want to run the sample applications and/or build the framework yourself. Ant build scripts for the framework and the samples are provided. The standard samples can be built with the included Ant runtime by invoking the corresponding "build.bat" files (see samples subdirectories). Latest info is available at the public website: http://www.springframework.org Project info at the SourceForge site: http://sourceforge.net/projects/springframework The Spring Framework is released under the terms of the Apache Software License (see license.txt). All libraries included in the "-with-dependencies" download are subject to their respective licenses. This product includes software developed by the Apache Software Foundation (http://www.apache.org). This product includes software developed by Clinton Begin (http://www.ibatis.com). 3. DISTRIBUTION JAR FILES The "dist" directory contains the following distinct JAR files for use in applications. Both module-specific JAR files and a JAR file with all of Spring are provided. The following list specifies the respective contents and third-party dependencies. Libraries in brackets are optional, i.e. just necessary for certain functionality. * "spring-core" (~185 KB) - Contents: bean container, core utilities - Dependencies: Commons Logging, (Log4J) * "spring-aop" (~110 KB) - Contents: AOP framework, source-level metadata support - Dependencies: spring-core, AOP Alliance, (CGLIB, Commons Attributes) * "spring-context" (~160 KB) - Contents: application context, validation framework, UI support, JNDI, mail, EJB, remoting, scheduling - Dependencies: spring-core, (Velocity, FreeMarker, JavaMail, EJB, JAX-RPC, Hessian, Burlap, Quartz) * "spring-dao" (~175 KB) - Contents: DAO support, transaction infrastructure, JDBC support - Dependencies: spring-core, (spring-aop, JTA) * "spring-orm" (~110 KB) - Contents: Hibernate support, JDO support, iBATIS SQL Maps support - Dependencies: spring-dao, (Hibernate, JDO, iBATIS SQL Maps) * "spring-web" (~70 KB) - Contents: web application context, multipart resolver, web utilities - Dependencies: spring-context, Servlet, (Commons FileUpload, COS) * "spring-webmvc" (~135 KB) - Contents: web MVC framework, web controllers, web views - Dependencies: spring-web, (JSP, JSTL, Tiles, iText, POI) * "spring" (~935 KB) - Contents: all of the above - Dependencies: all of the above Note: The above lists of third-party libraries assume J2SE 1.4 as foundation. For J2SE 1.3, an XML parser like Xerces, the JDBC 2.0 standard extension interfaces, and JNDI have to be added when using XML bean definitions, JDBC DataSource setup, and JNDI lookups, respectively. Note: To use the JSP expression language for arguments of Spring's web MVC tags, the Jakarta implementation of the JSTL (standard.jar) has to be available in the class path. Else, any JSTL implementation will do. 4. WHERE TO START? Documentation can be found in the "docs" directory: * the Spring reference documentation * various configuration and integration tutorials * various Spring-related articles Documented sample applications and skeletons can be found in "samples": * "countries" * "imagedb" * "jpetstore" * "petclinic" * "tiles-example" * "webapp-minimal" * "webapp-typical" Petclinic features alternative DAO implementations and application configurations for JDBC and Hibernate, on HSQL and MySQL. The default Petclinic configuration is Hibernate on HSQL; to be able to build and run it, the Spring distribution comes with Hibernate JAR files. The Spring JPetStore is an adapted version of Clinton Begin's JPetStore (available from http://www.ibatis.com). It leverages Spring's support for the iBATIS SQL Maps to improve the original JPetStore in terms of internal structure and wiring. On top of a Spring-managed middle tier, it offers two alternative web tier implementations: one using Spring's web MVC plus JSTL, and one using Struts 1.1 plus JSTL. The Image Database sample is a simple one-screen image management web app that illustrates various Spring-integrated technologies: BLOB/CLOB handling with MySQL and Oracle, Velocity and FreeMarker for web views, scheduling via Quartz and Timer, and mail sending via JavaMail. "Expert One-on-One J2EE Design and Development" discusses many of Spring's design ideas in detail. Note: The code examples in the book refer to the original framework version that came with the book. Thus, they need to be adapted for the current Spring release.
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