bookcategoryaction.java

来自「一个基本的图书馆管理系统」· Java 代码 · 共 93 行

package c18.struts.action;

import java.util.List;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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 c18.entity.Category;
import c18.helper.PageBean;
import c18.helper.PageResult;
import c18.service.BookService;
import c18.service.BookServiceImpl;
import c18.session.UserSession;
import c18.struts.action.exception.ActionException;
import c18.util.ConvertUtil;

/** 
 * 
 * 分类浏览Action类
 * @struts.action path="/book_category" scope="request"
 * @struts.action-forward name="success" path="/book_category.jsp"
 */
public class BookCategoryAction extends Action{
	/**
	 * 日志操作对象
	 */
    private static final Log log = LogFactory.getLog(BookCategoryAction.class);

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		//判断是否登陆,未登陆，回首页
		if(!UserSession.isLogin(request, response)){
			return mapping.findForward("/main");
		}
		
		//得到分类号
		int categoryNo =0;
		String scategoryNo = request.getParameter("categoryNo");
		if(scategoryNo != null && !scategoryNo.equals("")){
			categoryNo = ConvertUtil.convertInt(scategoryNo);
		}
		PageBean pageBean = PageBean.getPageBean(request, response);
		
		try {
			//创建BookService对象
			BookService bookservice = new BookServiceImpl();
			
			//查询分类全路径名称
			String categoryfullname = bookservice.getCategoryFullName(categoryNo);
			
			//父分类号
			int parentNo = 0;
			Category category = bookservice.getCategory(categoryNo);
			if(category != null){
				parentNo = category.getParentNo();
			}
			
			//查询分类信息
			List categorylist = bookservice.getCategorysBooks(categoryNo);
			
			//查询图书
			PageResult pageresult = bookservice.getBooksByCategory(categoryNo, pageBean);
			
			//在Request中放入查询结果
			request.setAttribute("categoryfullname", categoryfullname);
			request.setAttribute("parentcategoryno", parentNo);
			request.setAttribute("categoryno", categoryNo);
			request.setAttribute("categorylist", categorylist);
			request.setAttribute("pageresult", pageresult);
			
		} catch (ActionException e) {
			log.error(e);
		}
		
		return mapping.findForward("success");
	}
}