是考试作业，做一个连接数据库的查询程序。程序没错，但点查询后出现java.sql.SQLException: [Microsoft][ODBC 驱动程序管理器] 无效的游标状态的错误。高手帮忙，谢谢！部分代码：class RunDemand implements ActionListener { public void actionPerformed (ActionEvent e) { if(e.getSource() == demand) { try{ Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String ls = "select * from S where sno ="+snotf.getText(); Connection con = DriverManager.getConnection(url, user, password); Statement sta = con.createStatement(); ResultSet rs = sta.executeQuery(ls); sname1.setText(rs.getString("sname")); sex1.setText(rs.getString("sex")); birthday1.setText(rs.getString("birthday")); nation1.setText(rs.getString("nation")); place1.setText(rs.getString("place")); address1.setText(rs.getString("address")); post1.setText(rs.getString("post")); clname1.setText(rs.getString("clname")); dorm1.setText(rs.getString("dorm")); phone1.setText(rs.getString("phone")); email1.setText(rs.getString("email")); remark1.setText(rs.getString("remark")); }catch(SQLException sqle) { System.out.println(sqle.toString()); }catch(Exception ex){ System.out.println(ex.toString()); } } } }