loginaction.java

只做是单选题！数据库表有三张：EUser,EItem,Score

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package com.exam.controller;

import com.exam.model.ExamService;
import com.exam.model.LoginService;
import com.exam.model.User;
import java.sql.SQLException;
import java.util.LinkedList;
import java.util.List;
import javax.ejb.ObjectNotFoundException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;

/**
 *
 * @author fyadmin
 */
public class LoginAction extends org.apache.struts.action.Action {

    /* forward name="success" path="" */
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request,
            HttpServletResponse response) throws SQLException, ObjectNotFoundException {
        List errorMsgs = new LinkedList();
        ExamService es = new ExamService();
        HttpSession session = request.getSession();
        try {
            String userName = request.getParameter("username");
            String passWord = request.getParameter("password");
            if (userName.length() == 0) {
                errorMsgs.add("请填写用户名");
            }
            if (passWord.length() == 0) {
                errorMsgs.add("请填写密码");
            }
            if (userName.length() != 0 && passWord.length() != 0) {
                LoginService loginSvc = new LoginService();
                User user = loginSvc.getRetriver(userName, passWord);

                if (user == null) {
                    errorMsgs.add("请填写正确的用户名和密码");
                } else {
                    session.setAttribute("question_list", es.getAllExam());
                    session.setAttribute("uid", user.getUID());
                    return mapping.findForward("success");
                }
            }
            if (!errorMsgs.isEmpty()) {
                request.setAttribute("errorMsgs", errorMsgs);
                return mapping.findForward("error");
            }
        } catch (RuntimeException e) {
            e.printStackTrace(System.err);
            errorMsgs.add(e.getMessage());
        }
        return mapping.findForward("error");
    }
}