web已连接oracle数据库但是无法进入验证

Question

1. 1. ****import javax.servlet.*;
      import java.io.*;
      import javax.servlet.http.*;
      import java.sql.*;
      public class Yz extends HttpServlet
      {
      public void doPost(HttpServletRequest req,HttpServletResponse res)throws IOException,ServletException
      {
      req.setCharacterEncoding("utf-8");

      PrintWriter out=res.getWriter();
      Connection ct=null;
      PreparedStatement ps=null;
      ResultSet rs=null;
      String id=req.getParameter("id");
      String mm=req.getParameter("mm");
      
      try
      {
          Class.forName("oracle.jdbc.driver.OracleDriver");
          ct=DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:oraclell","scott","qw123");
          ps=ct.prepareStatement("select * from users where id=? and pwod=? ");
          _//如果把上面改成ct.prepareStatement（”select * from users”） 的话就能用rs.getString（“id”）输出//_
          out.println("ss");
          ps.setString(1,id);
          ps.setString(2,mm);
          rs=ps.executeQuery();
          if(rs.next())
          {
              req.getRequestDispatcher("/Hy").forward(req, res);
      
          }else
          {
              req.getRequestDispatcher("/Tz").forward(req, res);
          }
          while(rs.next())
          {
              out.println(rs.getString("id"));
      
          }
      
      }catch(Exception e)
      {
      
      }finally
      {
      
      }
      

2. 1. }

}这是代码
如果ct.prepareStatement（”select * from users”） 的话就能用out.println（rs.getString（“id”））输出
貌似 ps=ct.prepareStatement("select * from users where id=? and pwod=? ");这句话有问题？ 请高手解答 我是自学的 没有老师可以问 谢谢了

Answer 1

出什么错？能否把错误贴出来