liststudentaction.java

本在线考试系统分成前台和后天

package org.yeeku.action;

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

import org.yeeku.action.base.BaseAction;
import org.yeeku.service.ExamService;
/**
 * @author  yeeku.H.lee [e-mail]
 * @version  1.0
 * <br>Copyright (C), 2005-2008, yeeku.H.Lee
 * <br>This program is protected by copyright laws.
 * <br>Program Name:
 * <br>Date: 
 */
public class ListStudentAction extends BaseAction
{
	public ActionForward execute(ActionMapping mapping,ActionForm form,
		HttpServletRequest request, HttpServletResponse response)throws Exception
	{
		int studentCount = examService.getStudentCount();
		if (studentCount < 1)
		{
			request.setAttribute("msg" , "暂时没有任何学生");
			return mapping.findForward("success");
		}
		int pageCount = examService.getPageCount(studentCount , ExamService.STUDENT_PAGE_SIZE);

		int pageNo;
		if (request.getParameter("pageNo") == null || request.getParameter("pageNo").trim().equals(""))
		{
			pageNo = 1;
		}
		try
		{
			pageNo = Integer.parseInt(request.getParameter("pageNo").trim());
		}
		catch (Exception e)
		{
			pageNo = 1;
		}
		//如果请求页已经超出了最大页
		if (pageNo > pageCount)
		{
			pageNo = pageCount;
		}
		request.setAttribute("pageCount" , pageCount);
		request.setAttribute("currentPage" , pageNo);
		request.setAttribute("studentList" , examService.listStudent(pageNo));

		return mapping.findForward("success");
	}
}