public void executeUpdate(String s)
    {
        try
        {
            conn = DriverManager.getConnection(sConnStr,"sa","123");
            Statement statement = conn.createStatement();
            statement.executeUpdate(s);
        }
        catch(SQLException sqlexception)
        {
            System.err.println("aq.executeUpdate: " + sqlexception.getMessage());
            System.err.println("aq.executeUpadatestrSQL: " + s);
        }
    }   public void dbclose() throws SQLException{ //关闭数据库
         if(conn!=null) conn.close();
         if(rs!=null) rs.close();
    }}