public class LoginAction extends Action {
 public ActionForward execute(ActionMapping mapping, ActionForm form,
   HttpServletRequest request, HttpServletResponse response) {
  // TODO Auto-generated method stub
  LoginForm form1=(LoginForm )form;
  UserPo po=new UserPo();
  po.setName(form1.getName());
  po.setPassword(form1.getPassword());
  ApplicationContext con=new ClassPathXmlApplicationContext("applicationContext.xml");
  UserDao dao=(UserDao)con.getBean("userDao");
  if(dao.selectUser(po))
  {
   return mapping.findForward("success");
  }
  else
  {
   System.out.println("不存在");
   return mapping.findForward("error");
  }
 
 }
}

public class LoginForm extends ActionForm {

  private int id;
 private String name;
 private String password;

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}