private static boolean isBaseType(final String paramType) {
        return BASE_TYPE_CACHE.get(paramType, key -> {
            try {
                return ReflectUtils.isPrimitives(ClassUtils.getClass(key));
            } catch (ClassNotFoundException e) {
                return false;
            }
        });
    }
isBaseType.

@param paramType the parameter type.
@return whether the base type is.
shenyu-plugin/shenyu-plugin-api/src/main/java/org/apache/shenyu/plugin/api/utils/BodyParamUtils.java