#1.14. 注册LoadTimeWeaver
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The `LoadTimeWeaver` is used by Spring to dynamically transform classes as they are loaded into the Java virtual
machine (JVM).
Spring 使用 `LoadTimeWeaver` 在类被加载到 Java 虚拟机（JVM）时动态转换类。
To enable load-time weaving, you can add the `@EnableLoadTimeWeaving` to one of your `@Configuration` classes, as the
following example shows:
要启用加载时织入，你可以将 `@EnableLoadTimeWeaving` 添加到你的 `@Configuration` 类之一中，如下例所示：
```
@Configuration @EnableLoadTimeWeaving public class AppConfig { }
```
@Configuration
@EnableLoadTimeWeaving
class AppConfig
Alternatively, for XML configuration, you can use the `context:load-time-weaver` element:
或者，对于 XML 配置，你可以使用 `context:load-time-weaver` 元素：
<beans>
<context:load-time-weaver/>
</beans>
Once configured for the `ApplicationContext`, any bean within that `ApplicationContext` may implement
`LoadTimeWeaverAware`, thereby receiving a reference to the load-time weaver instance. This is particularly useful in
combination
with [Spring’s JPA support](https://docs.spring.io/spring-framework/docs/5.3.39/reference/html/data-access.html#orm-jpa)
where load-time weaving may be necessary for JPA class transformation. Consult the [
`LocalContainerEntityManagerFactoryBean`](https://docs.spring.io/spring-framework/docs/5.3.39/javadoc-api/org/springframework/orm/jpa/LocalContainerEntityManagerFactoryBean.html)
javadoc for more detail. For more on AspectJ load-time weaving,
see [Load-time Weaving with AspectJ in the Spring Framework](#aop-aj-ltw).
一旦为 `ApplicationContext` 配置，该 `ApplicationContext` 内的任何 bean 都可以实现 `LoadTimeWeaverAware`
，从而获得对加载时编织实例的引用。这在与 Spring 的 JPA 支持结合使用时特别有用，因为 JPA 类转换可能需要加载时编织。有关更多详细信息，请参阅
`LocalContainerEntityManagerFactoryBean` javadoc。有关 AspectJ 加载时编织的更多信息，请参阅 Spring 框架中的“AspectJ
加载时编织”。
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