.....

src/main/java/cn/com/qmth/examcloud/web/mongodb/MongodbDetector.java

@@ -56,8 +56,8 @@ public class MongodbDetector implements ApplicationRunner {
 		}
 
 		try {
-			Method getDbMethod = mongoTemplateClass.getClass().getMethod("getDb");
-			Object mongoDatabaseObject = getDbMethod.invoke(getDbMethod);
+			Method getDbMethod = mongoTemplateClass.getMethod("getDb");
+			Object mongoDatabaseObject = getDbMethod.invoke(mongoTemplateObject);
 			Method getNameMethod = mongoDatabaseObject.getClass().getMethod("getName");
 			Object dbName = getNameMethod.invoke(mongoDatabaseObject);
 			LOG.info("mongo.db=" + dbName);