Spring 获取自定义注解所有类

Posted 2022-11-30 醇氧

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.ApplicationListener;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.core.annotation.AnnotationUtils;

import java.lang.annotation.Annotation;
import java.util.Map;
import java.util.Set;


public class ComponentScannerConfigurerBk implements ApplicationListener<ContextRefreshedEvent>, ApplicationContextAware 
    private ComponentScannerConfigurer registrationCenter;


    private ApplicationContext applicationContext;
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException 
        this.applicationContext = applicationContext;
    

    @Override
    public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) 
        Class<? extends Annotation> annotationClass = ComponentDesc.class;
        Map<String,Object> beanWhithAnnotation = applicationContext.getBeansWithAnnotation(annotationClass);
        Set<Map.Entry<String,Object>> entitySet = beanWhithAnnotation.entrySet();
        for (Map.Entry<String,Object> entry :entitySet)
            Class<? extends Object> clazz = entry.getValue().getClass();//获取bean对象
            System.out.println("================"+clazz.getName());
            ComponentDesc componentDesc = AnnotationUtils.findAnnotation(clazz,ComponentDesc.class);
            System.out.println("==================="+componentDesc.channel());