【二三方】_SpringUtil工具类

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SpringUtil工具类

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/**
 * Spring 工具类
 */
@Component
public class SpringUtil implements ApplicationContextAware {
    private static ApplicationContext context;

    @Override
    public void setApplicationContext(ApplicationContext context) throws BeansException {
        SpringUtil.context = context;
    }

    /**
     * 获取 Spring Bean
     *
     * @param clazz 类
     * @param <T>   泛型
     * @return 对象
     */
    public static <T> T getBean(Class<T> clazz) {
        if (clazz == null) {
            return null;
        }
        return context.getBean(clazz);
    }

    /**
     * 获取 Spring Bean
     *
     * @param bean 名称
     * @param <T>  泛型
     * @return 对象
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String bean) {
        if (bean == null) {
            return null;
        }
        return (T) context.getBean(bean);
    }

    /**
     * 获取 Spring Bean
     *
     * @param beanName 名称
     * @param clazz    类
     * @param <T>      泛型
     * @return 对象
     */
    public static <T> T getBean(String beanName, Class<T> clazz) {
        if (null == beanName || "".equals(beanName.trim())) {
            return null;
        }
        if (clazz == null) {
            return null;
        }
        return (T) context.getBean(beanName, clazz);
    }

    /**
     * 获取上下文
     *
     * @return 上下文
     */
    public static ApplicationContext getContext() {
        if (context == null) {
            throw new RuntimeException("There has no Spring ApplicationContext!");
        }
        return context;
    }

    /**
     * 发布事件
     *
     * @param event 事件
     */
    public static void publishEvent(ApplicationEvent event) {
        if (context == null) {
            return;
        }
        try {
            context.publishEvent(event);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
}