change

src/connector/jdbc/src/main/java/com/taosdata/jdbc/AbstractStatement.java

@@ -246,17 +246,17 @@ public abstract class AbstractStatement implements Statement {
         return this.closeOnCompletion;
     }
 
-    @Override
-    public <T> T unwrap(Class<T> iface) throws SQLException {
-        try {
-            return iface.cast(this);
-        } catch (ClassCastException cce) {
-            throw new SQLException("Unable to unwrap to " + iface.toString());
-        }
-    }
-
-    @Override
-    public boolean isWrapperFor(Class<?> iface) throws SQLException {
-        return iface.isInstance(this);
-    }
+//    @Override
+//    public <T> T unwrap(Class<T> iface) throws SQLException {
+//        try {
+//            return iface.cast(this);
+//        } catch (ClassCastException cce) {
+//            throw new SQLException("Unable to unwrap to " + iface.toString());
+//        }
+//    }
+//
+//    @Override
+//    public boolean isWrapperFor(Class<?> iface) throws SQLException {
+//        return iface.isInstance(this);
+//    }
 }

src/connector/jdbc/src/test/java/com/taosdata/jdbc/StatementTest.java

@@ -8,9 +8,6 @@ import org.junit.Test;
 import java.sql.*;
 import java.util.Properties;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-
 public class StatementTest {
     static Connection connection = null;
     static Statement statement = null;
@@ -60,10 +57,10 @@ public class StatementTest {
         statement.executeUpdate("insert into " + dbName + "." + tName + " values (" + ts + ", 1)");
         statement.executeQuery("select * from " + dbName + "." + tName);
         ResultSet resultSet = statement.getResultSet();
-        assertTrue(null != resultSet);
+        Assert.assertNotNull(resultSet);
 
         boolean isClosed = statement.isClosed();
-        assertEquals(false, isClosed);
+        Assert.assertEquals(false, isClosed);
     }
 
     @Test(expected = SQLException.class)