bookinfoaction.java

来自「一个基本的图书馆管理系统」· Java 代码 · 共 78 行

package c18.struts.action;

import java.util.ArrayList;
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.Book;
import c18.service.BookService;
import c18.service.BookServiceImpl;
import c18.session.UserSession;
import c18.struts.action.exception.ActionException;
import c18.util.ConvertUtil;

/** 
 * 
 * 图书信息Action类
 * @struts.action path="/book_info" scope="request"
 * @struts.action-forward name="success" path="/book_info.jsp"
 */
public class BookInfoAction extends Action {
	private static final Log log = LogFactory.getLog(BookInfoAction.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
		if(!UserSession.isLogin(request, response)){
			return mapping.findForward("/main");
		}
		
		//得到图书号
		int bookNo =0;
		String sbookNo = request.getParameter("bookNo");
		if(sbookNo != null && !sbookNo.equals("")){
			bookNo = ConvertUtil.convertInt(sbookNo);
		}
		try {
			//创建BookService对象
			BookService bookservice = new BookServiceImpl(); 
			//得到图书信息
			Book book = bookservice.getBook(bookNo);
						
			//在Request中放入图书信息
			request.getSession().setAttribute("book", book);

			//得到分类信息
			List sortList = bookservice.getSortCategorys();
			if(sortList == null){
				sortList = new ArrayList();
			}
						
			//在Request中放入分类信息
			request.getSession().setAttribute("sortCategorys", sortList);
			
		} catch (ActionException e) {
			log.error(e);
		}
		
		return mapping.findForward("success");
	}
}