Java与mysql的交互

 try {
                conn= DBConnection.getConnection();
                stmt=conn.createStatement();

                // 执行SQL语句并将查询结果放入结果集中
                ResultSet rs=stmt.executeQuery(sql);
                // 将结果集中的数据取出放入User类的对象中
                if (rs.next())
                {
                    user=new User();
                    user.setUsername(rs.getString("vcUsername"));
                    user.setPassword(rs.getString("vcPassword"));
                    user.setRegDate(rs.getDate("dtRegDate").toString());
                    stmt.close();
                    conn.close();
                                    System.out.println(user.属性);
                    return user;
                }
            }
        catch (SQLException e)
          {
            System.out.println(e.getMessage());
        }