Springboot 如何获取上下文对象

package it.benjamin.aspirinweb.mem; 
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component; 
 
/**
 * 获取Springboot上下文，通过上下文可以拿到配置文件中的配置参数
 */
@Component
public class AppContextTool implements ApplicationContextAware {
    private static ApplicationContext context;
 
    public String getConfig(String key) {
        return context.getEnvironment().getProperty(key);
    }
 
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.context = applicationContext;
    } 
}
 

public class AppUtil {
    public static ConfigurableApplicationContext CONTEXT;
}

public static void main(String[] args) {
        AppUtil.CONTEXT = SpringApplication.run(RedisFlinkApplication.class, args);
}

@Component
public class SpringContextUtils implements ApplicationContextAware { 
    private static ApplicationContext applicationContext;
 
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtils.applicationContext = applicationContext;
    }
 
    public static <T> T getBean(Class<T> cls) {
        if (applicationContext == null) {
            throw new RuntimeException("applicationContext注入失败");
        }
        return applicationContext.getBean(cls);
    }
 
    public static Object getBean(String name) {
        if (applicationContext == null) {
            throw new RuntimeException("applicationContext注入失败");
        }
        return applicationContext.getBean(name);
    }
 
    public static <T> T getBean(String name, Class<T> cls) {
        if (applicationContext == null) {
            throw new RuntimeException("applicationContext注入失败");
        }
        return applicationContext.getBean(name, cls);
    }
 
    public static HttpServletRequest getRequest() {
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder
            .getRequestAttributes();
        return requestAttributes == null ? null : requestAttributes.getRequest();
    }
}

@Slf4j
public class SpringUtils { 
    private SpringUtils() {
    } 
    private static ApplicationContext context = null;
 
    /**
     * 初始化Spring上下文
     *
     * @param ctx 上下文对象
     */
    public static void initContext(ApplicationContext ctx) {
        if(ctx == null) {
            log.warn("ApplicationContext is null.");
            return;
        }
        context = ctx;
    } 
 
    /**
     * 根据类型获取Bean
     *
     * @param cls Bean类
     * @param <T> Bean类型
     * @return Bean对象
     */
    public static <T> T getBean(Class<T> cls) {
        return context == null ? null : context.getBean(cls);
    }
 
    /**
     * 根据名称获取Bean
     *
     * @param name Bean名称
     * @return Bean对象
     */
    public static Object getBean(String name) {
        return context == null ? null : context.getBean(name);
    }
 
    /**
     * 根据Bean名称和类获取Bean对象
     *
     * @param name Bean名称
     * @param cls Bean类
     * @param <T> Bean类型
     * @return Bean对象
     */
    public static <T> T getBean(String name, Class<T> cls) {
        return context == null ? null : context.getBean(name, cls);
    }
}

    public static void main(String[] args) {
        ApplicationContext context = SpringApplication.run(YCloudsServiceBApplication.class, args);
        SpringUtils.initContext(context);
    }