【fix sonar】JeroElasticsearchTemplate文件

jero-boot/jero-boot-base/jero-boot-base-core/src/main/java/com/jero/common/es/JeroElasticsearchTemplate.java

@@ -144,7 +144,7 @@ public class JeroElasticsearchTemplate {
         if (found) {
             return result.getJSONObject("_source");
         } else {
-            return null;
+            return new JSONObject();
         }
     }
 
@@ -245,7 +245,7 @@ public class JeroElasticsearchTemplate {
         } catch (org.springframework.web.client.HttpClientErrorException e) {
             String message = e.getMessage();
             if (message != null && message.contains("404 Not Found")) {
-                return null;
+                return new JSONObject();
             }
             throw e;
         }
@@ -380,7 +380,7 @@ public class JeroElasticsearchTemplate {
             data.remove("id");
             bodySB.append(data.toJSONString()).append("\n");
         }
-        System.out.println("+-+-+-: bodySB.toString(): " + bodySB.toString());
+        log.info("+-+-+-: bodySB.toString(): " + bodySB.toString());
         HttpHeaders headers = RestUtil.getHeaderApplicationJson();
         RestUtil.request(url, HttpMethod.PUT, headers, null, bodySB, JSONObject.class);
         return true;
@@ -481,7 +481,7 @@ public class JeroElasticsearchTemplate {
      */
     public JSONObject buildQueryString(String field, String... args) {
         if (field == null) {
-            return null;
+            return new JSONObject();
         }
         StringBuilder sb = new StringBuilder(field).append(":(");
         if (args != null) {