preborrowinfoaction.java

来自「一个基本的图书馆管理系统」· Java 代码 · 共 89 行

package c18.struts.action;

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.entity.PreBorrow;
import c18.entity.User;
import c18.service.BookService;
import c18.service.BookServiceImpl;
import c18.service.BorrowService;
import c18.service.BorrowServiceImpl;
import c18.service.UserService;
import c18.service.UserServiceImpl;
import c18.session.UserSession;
import c18.struts.action.exception.ActionException;
import c18.util.ConvertUtil;

/** 
 * 
 * 预借信息Action类
 * @struts.action path="/borrow_info" scope="request"
 * @struts.action-forward name="success" path="/borrow_info.jsp"
 */
public class PreBorrowInfoAction extends Action {
	private static final Log log = LogFactory.getLog(PreBorrowInfoAction.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");
		}
		
		//得到预借号
		int preBorrowNo =0;
		String spreBorrowNo = request.getParameter("preBorrowNo");
		if(spreBorrowNo != null && !spreBorrowNo.equals("")){
			preBorrowNo = ConvertUtil.convertInt(spreBorrowNo);
		}
		try {
			//创建BorrowService对象
			BorrowService borrowservice = new BorrowServiceImpl(); 
			//得到预借信息
			PreBorrow preBorrow = borrowservice.getPreBorrow(preBorrowNo);
			
			if(preBorrow == null){ //不存在预借信息
				log.debug("不存在预借信息");
				request.setAttribute("errorString", "不存在对应预借信息");
				return mapping.findForward("failure");
			}
			
			//创建BookService对象
			BookService bookservice = new BookServiceImpl(); 
			//得到图书信息
			Book book = bookservice.getBook(preBorrow.getBookNo());
			
			//得到相关用户信息
			UserService userservice = new UserServiceImpl();
			User user = userservice.getUser(preBorrow.getUserNo());
			
						
			//在Request中放入分类
			request.getSession().setAttribute("book", book);
			request.getSession().setAttribute("preBorrow", preBorrow);			
			request.getSession().setAttribute("borrowuser", user);
		} catch (ActionException e) {
			log.error(e);
		}
		
		return mapping.findForward("success");
	}
}