SpringBoot中SpringContextHolder工具类使用

SpringContextHolder作用：
以静态变量保存Spring ApplicationContext, 可在任何代码任何地方任何时候取出ApplicaitonContext。

SpringContextHolder

@Component
public class SpringContextHolder implements ApplicationContextAware {

    /**
     * 以静态变量保存ApplicationContext,可在任意代码中取出ApplicaitonContext.
     */
    private static ApplicationContext context;

    /**
     * 实现ApplicationContextAware接口的context注入函数, 将其存入静态变量.
     */

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

    /**
     * 获取applicationContext
     * @return
     */
    public ApplicationContext getApplicationContext() {
        return context;
    }

    /**
     * 通过name获取 Bean.
     * @param name
     * @return
     */
    public static Object getBean(String name){
        return context.getBean(name);
    }

    /**
     * 通过class获取Bean.
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> Map<String, T> getBeans(Class<T> clazz){
        return context.getBeansOfType(clazz);
    }

    /**
     * 通过class获取Bean.
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T getBean(Class<T> clazz){
        return context.getBean(clazz);
    }

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

使用

    protected TaskPushModeContext taskPushModeContext;

    @Override
    public void init(Task task) {
        taskPushModeContext  = (TaskPushModeContext) SpringContextHolder.getBean("taskPushModeContext");
    }

TaskPushModeContext

@Slf4j
@Setter
@AllArgsConstructor
@NoArgsConstructor
@Component
public class TaskPushModeContext {
    private ITaskPushMode pushTaskMode;
    @Autowired
    private CmsEnvironmentConfig cmsEnvironmentConfig;
}

参考文章
https://blog.youkuaiyun.com/weixin_30892037/article/details/96457618
https://blog.youkuaiyun.com/weixin_46082526/article/details/108759113
https://blog.youkuaiyun.com/Jamel_LiToo/article/details/86443766