静态变量使用@Value获取不到值，应该如何解决

@Slf4j
@Configuration
public class GatewayRoutersConfiguration {

    public static final long DEFAULT_TIMEOUT = 30000;

    public static String SERVER_ADDR;

    public static String NAMESPACE;

    public static String DATA_ID;

    public static String ROUTE_GROUP;

    public static String USERNAME;

    public static String PASSWORD;

    /**
     * 路由配置文件数据获取方式yml,nacos,database
     */
    public static String DATA_TYPE;

    @Value("${spring.cloud.nacos.discovery.server-addr}")
    public void setServerAddr(String serverAddr) {
        SERVER_ADDR = serverAddr;
    }

    @Value("${spring.cloud.nacos.discovery.namespace}")
    public void setNamespace(String namespace) {
        NAMESPACE = namespace;
    }

    @Value("${jeecg.route.config.data-id:#{null}}")
    public void setRouteDataId(String dataId) {
        DATA_ID = dataId + ".json";
    }

    @Value("${jeecg.route.config.group:DEFAULT_GROUP:#{null}}")
    public void setRouteGroup(String routeGroup) {
        ROUTE_GROUP = routeGroup;
    }

    @Value("${jeecg.route.config.data-type}")
    public void setDataType(String dataType) { DATA_TYPE = dataType; }

    @Value("${spring.cloud.nacos.config.username}")
    public void setUsername(String username) {
        USERNAME = username;
    }
    @Value("${spring.cloud.nacos.config.password}")
    public void setPassword(String password) {
        PASSWORD = password;
    }


    /**
     * 路由断言
     * @return
     */
    @Bean
    public RouterFunction routerFunction() {
        return RouterFunctions.route(
                RequestPredicates.path("/globalFallback").and(RequestPredicates.accept(MediaType.TEXT_PLAIN)), hystrixFallbackHandler);

    }

    /**
     * 映射接口文档默认地址（通过9999端口直接访问）
     * @param indexHtml
     * @return
     */
    @Bean
    public RouterFunction<ServerResponse> indexRouter(@Value("classpath:/META-INF/resources/doc.html") final org.springframework.core.io.Resource indexHtml) {
        return route(GET("/"), request -> ok().contentType(MediaType.TEXT_HTML).syncBody(indexHtml));
    }

    @Resource
    private HystrixFallbackHandler hystrixFallbackHandler;

}