To be used on @ Configuration classes; the simplest possible example of which follows:

 @Configuration
 @EnableLoadTimeWeaving
 public class AppConfig {
     // application-specific @Bean definitions ...
 The example above is equivalent to the following Spring XML configuration:
 
 <beans>
     <context:load-time-weaver/>
     <!-- application-specific <bean> definitions -->
 </beans>
 
The LoadTimeWeaverAware interface
 Any bean that implements the LoadTimeWeaverAware interface
 will then receive the LoadTimeWeaver reference automatically; for example,
 Spring's JPA bootstrap support.
 
Customizing the LoadTimeWeaver
 The default weaver is determined automatically: see DefaultContextLoadTimeWeaver.
 
To customize the weaver used, the @Configuration class annotated with
 @EnableLoadTimeWeaving may also implement the LoadTimeWeavingConfigurer
 interface and return a custom LoadTimeWeaver instance through the
 #getLoadTimeWeaver method:
 
 @Configuration
 @EnableLoadTimeWeaving
 public class AppConfig implements LoadTimeWeavingConfigurer {
     @Override
     public LoadTimeWeaver getLoadTimeWeaver() {
         MyLoadTimeWeaver ltw = new MyLoadTimeWeaver();
         ltw.addClassTransformer(myClassFileTransformer);
         // ...
         return ltw;
 
The example above can be compared to the following Spring XML configuration:
 
 <beans>
     <context:load-time-weaver weaverClass="com.acme.MyLoadTimeWeaver"/>
 </beans>
 
The code example differs from the XML example in that it actually instantiates the
 MyLoadTimeWeaver type, meaning that it can also configure the instance, e.g.
 calling the #addClassTransformer method. This demonstrates how the code-based
 configuration approach is more flexible through direct programmatic access.
 
Enabling AspectJ-based weaving
 AspectJ load-time weaving may be enabled with the aspectjWeaving()
 attribute, which will cause the AspectJ class transformer to
 be registered through LoadTimeWeaver.addTransformer(java.lang.instrument.ClassFileTransformer). AspectJ weaving will be
 activated by default if a "META-INF/aop.xml" resource is present on the classpath.
 Example:
 
 @Configuration
 @EnableLoadTimeWeaving(aspectjWeaving=ENABLED)
 public class AppConfig {
 
The example above can be compared to the following Spring XML configuration:
 
 <beans>
     <context:load-time-weaver aspectj-weaving="on"/>
 </beans>
 
The two examples are equivalent with one significant exception: in the XML case,
 the functionality of <context:spring-configured> is implicitly enabled when
 aspectj-weaving is "on".  This does not occur when using
 @EnableLoadTimeWeaving(aspectjWeaving=ENABLED). Instead you must explicitly add
 @EnableSpringConfigured (included in the spring-aspects module)