实现ApplicationContextAware得到自己的bean工具

标签：string   ext.get   void   except   err   private   pre   context   member   

public class SpringContextHolder implements ApplicationContextAware {

    private static ApplicationContext applicationContext;

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

    public static ApplicationContext getApplicationContext() {
        assertApplicationContext();
        return applicationContext;
    }

    @SuppressWarnings("unchecked")
    public static <T> T getBean(String beanName) {
        assertApplicationContext();
        return (T) applicationContext.getBean(beanName);
    }

    public static <T> T getBean(Class<T> requiredType) {
        assertApplicationContext();
        return applicationContext.getBean(requiredType);
    }

    private static void assertApplicationContext() {
        if (SpringContextHolder.applicationContext == null) {
            throw new RuntimeException("applicaitonContext属性为null,请检查是否注入了SpringContextHolder!");
        }
    }

}

在使用的时候 SpringContextHolder.getBean(MembersService.class)得到spring托管的bean

实现ApplicationContextAware得到自己的bean工具

标签：string   ext.get   void   except   err   private   pre   context   member   

原文地址：https://www.cnblogs.com/imjamin/p/10627284.html