viewitem.java

这是一个网站在线订单系统.可以删除,查询,修改

package com.bsw.order.servlet;

import java.io.IOException;
import java.io.PrintWriter;

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

import com.bsw.order.base.Orderitem;
import com.bsw.order.database.OrderitemDAO;

/**
 * @author 蜗牛
 * 实现item的查看
 *
 */
public class ViewItem extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public ViewItem() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		doPost(request,response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		//设置request,response参数
		response.setContentType("text/html");
		request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("utf-8");
		//获取当前查看的itemId与orderId
		String itemId=request.getParameter("itemId");
		String orderId=request.getParameter("orderId");
		//调用DAO,从数据库中查找
		OrderitemDAO od=new OrderitemDAO();
		Orderitem oi=od.queryItem(itemId);
		//创建session并且加入item各属性的值
		javax.servlet.http.HttpSession session=request.getSession();
		session.setAttribute("orderId",orderId);
		session.setAttribute("itemId",itemId);
		session.setAttribute("name",oi.getName() );
		session.setAttribute("discountType",oi.getDiscounttype() );
		session.setAttribute("num",oi.getUnitnum() );
		session.setAttribute("price",oi.getUnitprice() );
		session.setAttribute("sum",oi.getSum() );
		session.setAttribute("discount",oi.getDicount() );
		session.setAttribute("promotionNum",oi.getPromotionnum() );
		session.setAttribute("promotionPrice",oi.getPromotionprice() );
		//重定向显示到viewItem.jsp
		response.sendRedirect("/Order/com/bsw/order/jsp/viewItem.jsp");
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occure
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}