spingboot获得ioc容器

迈不过友情╰ 2023-06-26 12:16 2阅读 0赞

[本博客参考链接][Link 1]

> https://www.cnblogs.com/nongzihong/p/11350308.html

### 我的工具类 ###

package com.iot.donation.util;
    
    import org.springframework.beans.BeansException;
    import org.springframework.beans.factory.InitializingBean;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.ApplicationContextAware;
    import org.springframework.stereotype.Component;
    
    /** * @Author 张满 * @Description 获得ApplicationContext * @Date 2020/1/1 0:08 * @vsersion 1.0.0 **/
    @Component
    public final class SpringUtils implements ApplicationContextAware, InitializingBean { 
    
        private static ApplicationContext applicationContext;
    
    
        /** * @Author 张满 * @Description 启动时获得spring容器 * @Date 2020/1/1 14:43 * @Param [applicationContext] * @return void **/
        @Override
        public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { 
                SpringUtils.applicationContext = applicationContext;
        }
    
    
        public static ApplicationContext getApplicationContext(){ 
            return applicationContext;
        }
    
        public static Object getBean(String beanName){ 
            return getApplicationContext().getBean(beanName);
        }
    
        public static <T> T getBean(Class<T> clazz){ 
            return getApplicationContext().getBean(clazz);
        }
    
    
        /** * @Author 张满 * @Description 打印ioc容器中所有bean名称 * @Date 2020/1/1 14:34 * @Param [] * @return void **/
        @Override
        public void afterPropertiesSet() throws Exception { 
    // String[] names = applicationContext.getBeanDefinitionNames();
    // for (String name : names) { 
    // System.out.println(">>>>>>>>>>>>>>>>>>"+name);
    // }
    // System.out.println("<<<<<<<<<<<<<bean总数为"+applicationContext.getBeanDefinitionCount());
        }
    }

## 使用 ##

AlumniService alumniService = SpringUtils.getBean(AlumniServiceImpl.class);

[Link 1]: https://www.cnblogs.com/nongzihong/p/11350308.html