Figure 2-1. Spring Framework libraries upon extraction
Spring Modules
As of Spring version 3.1, Spring comes with 20 modules, packaged into 20 JAR files. Table 2-1 describes
these JAR files and their corresponding modules. The actual JAR file format is, for example,
org.springframework.aop-3.1.0.RELEASE.jar, though we have included only the specific module
portion for simplicity (as in aop, for example).
Table 2-1. Spring Modules
JAR File
Description
This module contains all the classes you need to use Spring's AOP features within
aop
your application. You also need to include this JAR in your application if you plan to
use other features in Spring that use AOP, such as declarative transaction
management. Moreover, classes that support integration with AspectJ are packed in
this module too.
ASM (asm.ow2.org) is a Java bytecode manipulation framework. Spring depends on
asm
this library to analyze the bytecode of Spring beans, dynamically modify them, and
generate new bytecode during runtime.
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