bug fix

src/main/java/cn/qg/holmes/service/auto/impl/AutoUtilsServiceImpl.java

@@ -113,7 +113,7 @@ public class AutoUtilsServiceImpl implements AutoUtilsService {
             Map<String, String> extractMap = JSON.parseObject(extract, Map.class);
             for (String key: extractMap.keySet()) {
                 String value = extractMap.get(key);
-                String extractValue = "";
+                Object extractValue = "";
                 // 如果以$开头，则使用JsonPath解析
                 if (value.startsWith("$")) {
                     extractValue = JsonPath.read(response, value);