慕课网--Java开发企业级权限管理系统（三）

@Component("applicationContextHelper")
public class ApplicationContextHelper implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext context) throws BeansException {
        applicationContext = context;
    }

    public static <T> T popBean(Class<T> clazz) {
        if (applicationContext == null) {
            return null;
        }
        return applicationContext.getBean(clazz);
    }

    public static <T> T popBean(String name, Class<T> clazz) {
        if (applicationContext == null) {
            return null;
        }
        return applicationContext.getBean(name, clazz);
    }
}

springboot中需要对其进行初始化

@SpringBootApplication
@ComponentScan({"xxx.**.*"})
public class xxxApplication {
 
    public static void main(String[] args) {
        ApplicationContext context =SpringApplication.run(xxxApplication.class, args);
        ApplicationContextHelper.setApplicationContext(context);
    }
 
}