thshowuploadaction.java

在线考试功能

package com.onlinestudy.action.teacher;

import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;

import com.onlinestudy.domain.Download;
import com.onlinestudy.service.UploadService;


public class ThShowUploadAction extends DispatchAction {
	
	UploadService uplService;
	
	//显示上传分类列表
	public ActionForward showClasses(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		List list = uplService.selectClasses();
		
		request.setAttribute("list",list);
		request.getRequestDispatcher("upload_class_list.jsp").forward(request, response);
		return null;
	}

	
	//分页显示资源列表
	public ActionForward showFileList(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws Exception{
			int currentPage = 1;
			currentPage = Integer.parseInt(request.getParameter("nextpage"));
			System.out.println(currentPage);
			int totalNews = uplService.selectFileCount(); 
			int length = 10;       //读取数据记录数
			String hql = "from Download order by uploadDate desc";
			int totalPages = (totalNews-1)/length+1;
			if(currentPage < 1){
					currentPage = 1;
				}										
			if(currentPage > totalPages){
				currentPage = totalPages;
			}
			int offset = (currentPage-1)*length;  //开始取数据的下标
			List list = uplService.selectFilesForPage(hql, offset, length);
			request.setAttribute("totalStudents", Integer.toString(totalNews));
			request.setAttribute("totalPages", Integer.toString(totalPages));
			request.setAttribute("currentPage", Integer.toString(currentPage));
			request.setAttribute("list", list);

		request.getRequestDispatcher("upload_list.jsp").forward(request, response);
		return null;
	}
	
	
	//显示添加上传页面
	public ActionForward showAdd(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		List list = uplService.selectClasses();
		
		request.setAttribute("list",list);
		request.getRequestDispatcher("upload_add.jsp").forward(request, response);
		return null;
	}
	
	//显示修改页面
	public ActionForward showUpdate(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		int id = Integer.parseInt(request.getParameter("id"));
		Download files = uplService.selectFilesByid(id);
		
		List list = uplService.selectClasses();
		request.setAttribute("list",list);
		request.setAttribute("files", files);
		
		request.getRequestDispatcher("upload_update.jsp").forward(request, response);
		return null;
	}

	public void setUplService(UploadService uplService) {
		this.uplService = uplService;
	}

}