delbookaction.java

该系统的主要功能是

package com.laoniu.web.action;

import java.util.Map;

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

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 com.laoniu.bean.Book;
import com.laoniu.common.BeanFactory;
import com.laoniu.common.exception.OrderServiceException;
import com.laoniu.service.IOrderService;

public class DelBookAction extends Action
{

	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
	{
		String bookid=request.getParameter("id");
		IOrderService service=(IOrderService) BeanFactory.getBean(BeanFactory.ORDERSERVICE);
		Map<Long,Book> map=null;
		HttpSession session=request.getSession();
		ServletContext context=session.getServletContext();
		try {
			map=(Map<Long, Book>)context.getAttribute("books");
			//删除数据库中的信息
			service.deleteBook(new Long(bookid));
			//删除全局作用中的信息
			map.remove(new Long(bookid));
			context.setAttribute("books",map);
			return mapping.findForward("success");
		} catch (Exception e) {
			e.printStackTrace();
			request.setAttribute("message",e.getMessage());
			return mapping.findForward("success");
		}
	}
	
}