REPORT-11437 调整druid源码

fine-druid/src/com/fr/third/alibaba/druid/pool/DruidDataSourceFactory.java

@@ -425,11 +425,11 @@ public class DruidDataSourceFactory implements ObjectFactory {
         }
 
         value = (String) properties.get(PROP_VALIDATIONQUERY);
-        if (value != null) {
+        if (value != null && value.length() > 0) {
             dataSource.setValidationQuery(value);
         } else {
             value = (String) properties.get(HB_PROP_VALIDATIONQUERY);
-            if (value != null) {
+            if (value != null && value.length() > 0) {
                 dataSource.setValidationQuery(value);
             }
         }