delorderservlet.java

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package shop;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

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

public final class DelOrderServlet extends HttpServlet{
	
	
	public DelOrderServlet(){
		super();
	}
	
	public void init(ServletConfig config)throws ServletException{
		super.init(config);
	}
	public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {      
		
		
		HttpSession session = req.getSession();
		if(session==null){
			System.out.println("no session");
			System.exit(1);
			
		}        
		String 	orderno = (String)req.getParameter("orderNo");
		
		Member member = (Member)session.getAttribute(Constants.LOGIN_USER_KEY);
		/*
		 * 判断用户是否登陆
		 */		
		if (member==null) {
			System.out.println("用户未登录！~！"); 
  			resp.sendRedirect("wrong.jsp");  //用户未登陆
		}
		else {
			//利用数据库中相关的操作
			DB db=new DB();
			shop sp=new shop();
			List orderList = null;
			try {
				Order order=sp.getOrder(db,orderno);
				sp.delete(order);
				orderList = sp.getOrders(db,member.getId());
			} catch (Exception e) {
				// TODO 自动生成 catch 块
				e.printStackTrace();
			}
			session.setAttribute(Constants.ORDER_LIST_KEY,orderList);
		   	resp.sendRedirect("orderList.jsp");					
		}
 	}	
}