如何在Spring MVC中使用JDBC从数据库中检查用户名和密码？

Question

DAO代码

public List<UserBeans> authenticateUser(UserBeans userBean) 
    {
        List<UserBeans> userlist =new ArrayList<UserBeans>();
        UserBeans user = new UserBeans();
        //@SuppressWarnings("deprecation")
        java.sql.Connection con = null;
        try {
            con = dataSource.getConnection();
        } catch (SQLException e1) 
        {

            e1.printStackTrace();
        }
        try
        {
        java.sql.PreparedStatement pst=con.prepareStatement("select loginid, studentid, email from login " +
                " where email = "+userBean.getemail()+" and password = "+userBean.getpassword());
        ResultSet rs=pst.executeQuery();
        while(rs.next())
        {
            user.setloginid(rs.getInt("loginid"));
            user.setstudentid(rs.getInt("studentid"));
            user.setemail(rs.getString("email"));
            userlist.add(user);
        }
        rs.close();
        }
        catch(Exception e)
        {
            System.out.print(e);
        }
        return userlist;        
    }

控制器代码

@RequestMapping(value="/doLogin", method = RequestMethod.GET)
    public ModelAndView doLoginn(@ModelAttribute @Valid UserBeans userBean,BindingResult result, HttpSession session)
    {
        ModelAndView view = null;
        List<UserBeans> bean=new ArrayList<UserBeans>();
         bean=eventlogins.authenticateUser(userBean);
         if(!result.hasFieldErrors())
         {
        if(bean!=null && userBean.getemail()!=null && userBean.getpassword()!=null) 
        {   
            session.setAttribute("bean",bean);
            System.out.println("username and password are correct");
            view =new ModelAndView("studentdashboard"); 
        } 
        else
        {
            view=new ModelAndView("login");
            system.out.println("username and password are wrong");
        }
         }
        return view;
    }

如何检查电子邮件和密码是否正确。实际上，DAO将列表返回给控制器，然后将其与控制器代码中的电子邮件和密码匹配。如果电子邮件和密码正确，则用于学生仪表板，否则仅保留在登录页面中。