public void closeAll() {
        try {
            // SQLSERVER AND ORACLE is not support rs and st close
            // if (rs != null && !rs.isClosed()) {
            // rs.close();
            // }
            rs = null;

            // if (st != null && !st.isClosed()) {
            // st.close();
            // }
            st = null;
            if (con != null && !con.isClosed()) {
                con.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }