自定义一个SpringUtil用于通过静态方法获取被spring管理的bean对象，用于在静态方法中使用IOC中的bean或者是没有被spring管理的类中使用IOC容器的bean

Posted 2022-12-14 Acmen-zym

@Component
public class SpringUtil implements ApplicationContextAware 

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException 
        if(SpringUtil.applicationContext == null) 
            SpringUtil.applicationContext = applicationContext;
        
    

    /**
     * 获取applicationContext
     *
     * @return applicationContext
     */
    public static ApplicationContext getApplicationContext() 
        return applicationContext;
    

    /**
     * 通过name获取 Bean.
     *
     * @param name
     * @return Object
     */
    public static Object getBean(String name)
        return getApplicationContext().getBean(name);
    
    
    /**
     * 通过class获取Bean.
     *
     * @param clazz
     * @param <T>
     * @return bean对象
     */
    public static <T> T getBean(Class<T> clazz)
        return getApplicationContext().getBean(clazz);
    

    /**
     * 通过name,以及Clazz返回指定的Bean
     *
     * @param name
     * @param clazz
     * @param <T>
     * @return bean对象
     */
    public static <T> T getBean(String name,Class<T> clazz)
        return getApplicationContext().getBean(name, clazz);