private static List<HttpMessageReader<?>> getReaders() {
        return SpringBeanUtils.getInstance().getBean(ServerCodecConfigurer.class).getReaders();
    }
Gets reads from ServerCodecConfigurer with custom the codec.
@return ServerCodecConfigurer readers
shenyu-plugin/shenyu-plugin-base/src/main/java/org/apache/shenyu/plugin/base/utils/ResponseUtils.java