WebSocket 中使用 @Autowired 注入对应为null的解决方案

@Component
public class WebSocketHandlerMessage implements WebSocketHandler {
    @Autowired
    private BarrageMessageService barrageMessageService;
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@Component
public class WebSocketHandlerMessage implements WebSocketHandler {
    /**
     *  这里使用静态，让 service 属于类
     */
    private static BarrageMessageService barrageMessageService;
    /**
     *  注入的时候，给类的 service 注入
     */
    @Autowired
    public void setBarrageMessageService(BarrageMessageService barrageMessageService) {
        WebSocketHandlerMessage.barrageMessageService = barrageMessageService;
    }
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@Component
public class WebSocketHandlerMessage implements WebSocketHandler {
    /**
     * 获取 barrageMessageService 对象方法
     *
     * @return
     */
    public BarrageMessageService getMessageService() {
        return SpringContext.getBean(BarrageMessageService.class);
    }
    /**
     * 获取 stringRedisTemplate 对象方法
     *
     * @return
     */
    public StringRedisTemplate getStringRedisTemplate() {
        return SpringContext.getBean(StringRedisTemplate.class);
    }
｝

/**
 * @Description: SpringContext  获取 Spring 上下文信息
 * @Author: mingtian
 * @CreateDate: 2020/6/8 14:59
 * @Version: 1.0
 */
@Component
public class SpringContext implements ApplicationContextAware {
    /**
     * 打印日志
     */
    private Logger logger = LoggerFactory.getLogger(getClass());
    /**
     * 获取上下文对象
     */
    private static ApplicationContext applicationContext;
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContext.applicationContext = applicationContext;
        logger.info("set applicationContext");
    }
    /**
     * 获取 applicationContext
     *
     * @return
     */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }
    /**
     * 通过 name 获取 bean 对象
     *
     * @param name
     * @return
     */
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }
    /**
     * 通过 class 获取 bean 对象
     *
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }
    /**
     * 通过 name，clazz  获取指定的 bean 对象
     *
     * @param name
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }
}