booklistaction.java

模仿当当网基于struts+hierbernate与mysql的商务网站。

package org.whatisjava.dang.action;

import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.whatisjava.dang.dao.BookDao;
import org.whatisjava.dang.form.BookListForm;
import org.whatisjava.dang.service.CatalogService;

public class BookListAction extends Action {
	Logger logger = Logger.getLogger(this.getClass());

	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		CatalogService service = new CatalogService();
		
		BookListForm f=(BookListForm)form;
		logger.debug("form:"+f);
		int category_id =(Integer)f.getCategory3();
		Integer page = (Integer)f.getPage();
		if(page==null){
			page=1;
			f.setPage(page);
		}
		//logger.debug(page);
		Integer orderBy=(Integer)f.getSelect();
		if(orderBy==null){
			orderBy=BookDao.ADD_TIME_DESC;
		}
		List list = service.findBookByPage(category_id,orderBy, 10, page);
		int pageNum = service.getBookTotalPageNum(category_id, 10);
		//logger.debug(pageNum);
		request.setAttribute("list", list);
		request.setAttribute("pageNum", pageNum);
		return mapping.findForward("success");
	}
}