springboot 通过ApplicationContextAware接口方式去获取上下文报NUllPointerException

springboot 通过ApplicationContextAware接口方式去获取上下文报NUllPointerException

ApplicationContextAware接口方式去获取上下文NUllPointerException

根据网上各路帖子可以知道写法这里不再重复，更关键的一步是 一定要把定义的工具类加载顺序放到调用类的前面 ，不然启动就会报错

好吧 各路群众对不再重复怨念极大.....补充下

nfig;import org.springframework.beans.BeansException;
import t.ApplicationContext;
import t.ApplicationContextAware;
import org.springframework.stereotype.Service;@Service
public class ASpringUtil implements ApplicationContextAware {private static ApplicationContext applicationContext = null;@Overridepublic void setApplicationContext(ApplicationContext applicationContext) throws BeansException {if(ASpringUtil.applicationContext == null) {ASpringUtil.applicationContext = applicationContext;}}//获取applicationContextpublic static ApplicationContext getApplicationContext() {return applicationContext;}//通过name获取 Bean.public static Object getBean(String name){return getApplicationContext().getBean(name);}//通过class获取Bean.public static <T> T getBean(Class<T> clazz){return getApplicationContext().getBean(clazz);}//通过name,以及Clazz返回指定的Beanpublic static <T> T getBean(String name,Class<T> clazz){return getApplicationContext().getBean(name, clazz);}}