change

tests/examples/JDBC/JDBCDemo/src/main/java/com/taosdata/example/JDBCDemo.java

@@ -5,7 +5,7 @@ import java.util.Properties;
 
 public class JDBCDemo {
     private static String host;
-    private static String driverType;
+    private static String driverType = "jni";
     private static final String dbName = "test";
     private static final String tbName = "weather";
     private Connection connection;