resultviewaction.java

J2EE电子商务系统开发从入门到精通---基于Struts和Hibernate技术实现

/*
 * ResultViewAction.java
 *
 * Created on 2006年8月19日, 下午7:49
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package action.vote;

import dbservice.hibernate.HibernateService;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import model.hr.hibernate.Department;
import model.hr.hibernate.DepartmentUtil;
import model.vote.hibernate.*;
import java.util.*;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
/**
 *
 * @author Administrator
 * @version
 */

public class ResultViewAction extends Action {
    
    /* forward name="success" path="" */
    private final static String SUCCESS = "success";
    
    /**
     * This is the action called from the Struts framework.
     * @param mapping The ActionMapping used to select this instance.
     * @param form The optional ActionForm bean for this request.
     * @param request The HTTP Request we are processing.
     * @param response The HTTP Response we are processing.
     * @throws java.lang.Exception
     * @return
     */
    public ActionForward execute(ActionMapping mapping, ActionForm  form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        // 从用户Http请求中得到参数themeid的值，即当前议题信息的编号
        String themeId = request.getParameter("themeid");
        
        // 根据编号，从数据库读取对应的议题信息
        Theme theme = ThemeUtil.find(themeId);
        if (theme == null) {
            return new ActionForward(mapping.getInput());
        }
        
        // 根据议题编号，从数据库读取对应议题中的选项信息
        List list = ChoiceUtil.findAll(themeId);
        if (list == null) {
            return new ActionForward(mapping.getInput());
        }
        
        // 获得HttpSession缓存
        HttpSession httpSession = request.getSession();
        // 将议题信息存入缓存
        httpSession.setAttribute("theme", theme);
        // 将议题选项信息存入缓存
        httpSession.setAttribute("choicelist", list);
        
        String type = request.getParameter("type");
        if (type.equals("result")) {
            // 根据议题信息编号，从数据库中读取对应的投票信息
            list = ResultUtil.getResultByTheme(themeId);
            if (list == null) {
                return new ActionForward(mapping.getInput());
            }
            // 将投票信息存入缓存
            httpSession.setAttribute("resultbytheme", list);
            
            // 从数据库读取当前所有的部门信息
            List depList = DepartmentUtil.findAll();
            if (list == null) {
                return new ActionForward(mapping.getInput());
            }
            // 将部门信息存入缓存
            httpSession.setAttribute("departmentlist", depList);
            
            // 根据议题信息编号，从数据库中读取对应议题在各部门中的投票情况
            list = new ArrayList();
            for (int i=0; i<depList.size(); i++) {
                Department dep = (Department)depList.get(i);
                List l = ResultUtil.getResultByDepartment(themeId, dep);
                list.add(l);
            }
            
            // 将部门投票信息存入缓存
            httpSession.setAttribute("resultbydepartment", list);            
        }
        
        return mapping.findForward(type);
    }
}