sellshoppingdelete.java

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package com.jxc.servlet.sellshopping;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;

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

import com.jxc.dao.Conn;
import com.jxc.dao.SellshoppingTreat;
import com.jxc.dao.ShoppingTreat;
import com.jxc.dao.StockShoppingTreat;
import com.jxc.vo.Sellshopping;

public class SellShoppingDelete extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public SellShoppingDelete() {
		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 {

		this.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 {

		String id=request.getParameter("id");
		HttpSession session=request.getSession();
		Connection conn1=Conn.getConnection();
		Connection conn2=Conn.getConnection();
		Connection conn3=Conn.getConnection();
		
		if("".equals(id)){
			session.setAttribute("erro","null");
			
			response.sendRedirect("sellshoppingdelete.jsp");
		}else{
			int ID=Integer.parseInt(id);
			Sellshopping sell=(Sellshopping) new SellshoppingTreat().selectById(conn1, ID);
			String sid=sell.getSid();
			int num=sell.getOutnum();
			if(new SellshoppingTreat().deleteById(conn2, ID)&&new StockShoppingTreat().updateById(conn3, sid, num)){
							
				session.setAttribute("erro","succ");
				response.sendRedirect("sellshoppingdelete.jsp");
			}
			else{
				session.setAttribute("erro","flase");
				
					response.sendRedirect("sellshoppingdelete.jsp");
					
			}
		}
		
	}
		
	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}