public List getUserByName(String name,String password){
        ResultSet rs = null;
        PreparedStatement stat = null;
        Connection conn = null;
        List list = new ArrayList();
        try {
            conn = createConnection();
            
            String sql = "select name,password from manager where  name=? and password=?";
            stat = conn.prepareStatement(sql);
            stat.setString(1, name);
            stat.setString(2, password);
            rs = stat.executeQuery(sql);
            while (rs.next()) {
                System.out.println(rs.getString(1));
                String []user = new String[2];
                user[0] = rs.getString(1);
                user[1] = rs.getString(2);
                list.add(user);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            closeAll(rs, stat, conn);
        }
        return list;
    }