springboot注解@Configuration属性proxyBeanMethods详解

╰+哭是因爲堅強的太久メ 2022-12-01 05:26 144阅读 0赞

> proxyBeanMethods属性默认值是true,也就是说该配置类会被代理（CGLIB），在同一个配置文件中调用其它被@Bean注解标注的方法获取对象时会直接从IOC容器之中获取；

##### 1.看下源码注解 #####

/** * Specify whether {@code @Bean} methods should get proxied in order to enforce * bean lifecycle behavior, e.g. to return shared singleton bean instances even * in case of direct {@code @Bean} method calls in user code. This feature * requires method interception, implemented through a runtime-generated CGLIB * subclass which comes with limitations such as the configuration class and * its methods not being allowed to declare {@code final}. * <p>The default is {@code true}, allowing for 'inter-bean references' via direct * method calls within the configuration class as well as for external calls to * this configuration's {@code @Bean} methods, e.g. from another configuration class. * If this is not needed since each of this particular configuration's {@code @Bean} * methods is self-contained and designed as a plain factory method for container use, * switch this flag to {@code false} in order to avoid CGLIB subclass processing. * <p>Turning off bean method interception effectively processes {@code @Bean} * methods individually like when declared on non-{@code @Configuration} classes, * a.k.a. "@Bean Lite Mode" (see {@link Bean @Bean's javadoc}). It is therefore * behaviorally equivalent to removing the {@code @Configuration} stereotype. * @since 5.2 */
    	boolean proxyBeanMethods() default true;

注解的意思是proxyBeanMethods配置类是用来指定@Bean注解标注的方法是否使用代理，默认是true使用代理，直接从IOC容器之中取得对象；如果设置为false,也就是不使用注解，每次调用@Bean标注的方法获取到的对象和IOC容器中的都不一样，是一个新的对象，所以我们可以将此属性设置为false来提高性能；

GitHub地址：[https://github.com/mingyang66/spring-parent/tree/master/doc/base][https_github.com_mingyang66_spring-parent_tree_master_doc_base]

[https_github.com_mingyang66_spring-parent_tree_master_doc_base]: https://github.com/mingyang66/spring-parent/tree/master/doc/base