SpringBoot 五种获取ApplicationContext的方式

1.直接通过@Resource注解注入

@Resource

ApplicationContext applicationContext;

2.实现ApplicationContextAware接口

@Component

public class SpringBeanUtils implements ApplicationContextAware {

private static ApplicationContext applicationContext;

@Override

public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {

SpringBeanUtils.applicationContext = applicationContext;

}

public ApplicationContext getApplicationContext(){

return applicationContext;

}

}

3.在启动类main方法中设置

ConfigurableApplicationContext run = SpringApplication.run(DemoApplication.class, args);

SpringBeanUtils.applicationContext = run;

4.实现ApplicationListener接口

@Component

public class CustomApplicationListener implements ApplicationListener<ApplicationContextEvent> {

@Override

public void onApplicationEvent(ApplicationContextEvent event) {

SpringBeanUtils.applicationContext = event.getApplicationContext();

}

}

5.实现ApplicationContextInitializer接口

@Component

public class CustomApplicationContextInitializer implements ApplicationContextInitializer {

@Override

public void initialize(ConfigurableApplicationContext applicationContext) {

SpringBeanUtils.applicationContext = applicationContext;

}

}