[Fix-16786][Datasource] Fix jdbc connect parameters json validation question (#16787)

dolphinscheduler-ui/src/utils/json.ts

@@ -19,18 +19,12 @@
  * Verify if it is in json format
  */
 const isJson = (str: string) => {
-  if (typeof str === 'string') {
   try {
     const obj = JSON.parse(str)
-      if (typeof obj === 'object' && obj) {
-        return true
-      } else {
-        return false
-      }
+    return !!(typeof obj === 'object' && obj && !Array.isArray(obj))
   } catch (e) {
     return false
   }
-  }
 }
 
 export default isJson