loginaction.java

这个是j2eejava web 编程精要十五讲的全部源码。对学习java web编程的人来说是很能得的资料

package login;

import org.apache.struts.action.*;
import org.apache.struts.validator.DynaValidatorForm;
import javax.servlet.http.*;
import java.util.*;

public class loginAction extends Action {
  public ActionForward execute(ActionMapping actionMapping,
                               ActionForm form,
                               HttpServletRequest request,
                               HttpServletResponse response)
  {

  //从form bean中取出表单数据
    DynaValidatorForm loginActionForm = (DynaValidatorForm)form;
    String username = (String)loginActionForm.get("username");
   String password = (String)loginActionForm.get("password");

//生成一个Session 对象
      HttpSession session = request.getSession(true);
      session.removeAttribute("username");
      session.setAttribute("username",username);

//生成一个ArrayList对象，并把用户名和密码的值存入该对象中
      ArrayList arr = new ArrayList();
      arr.add(username);
       arr.add(password);

       String prompt;

      //调用模型组件loginHandler，检查该用户是否已注册
       loginHandler login = new loginHandler();
       boolean mark = login.checkLogin(arr);

       if(mark)  prompt = "Success";
         else {
          // ActionMessages errors = new ActionMessages();
           //errors.add(ActionMessages.GLOBAL_MESSAGE,
             //         new ActionMessage("lable.deny"));
           //if (!errors.isEmpty()) saveErrors(request,errors);
           prompt = "Fail";
         }
      return actionMapping.findForward(prompt);
  }
}