inshoppingselect.java

是一个企业的进销存系统。账号问1001密码为123456

package com.jxc.servlet.inshopping;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.util.ArrayList;
import java.util.List;

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.InShoppingTreat;
import com.jxc.dao.ShoppingTreat;
import com.jxc.page.ListPage;

public class InShoppingSelect extends HttpServlet {

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

		 Connection conn=Conn.getConnection();
	     HttpSession session=request.getSession();
	     int pagenumber = 0;
			if ("".equals(request.getParameter("pagenumber"))
					|| null == request.getParameter("pagenumber")) {
				pagenumber = 1;
			} else {
				pagenumber = Integer.parseInt((String) request
						.getParameter("pagenumber"));
			}
	     ArrayList list=new InShoppingTreat().selectAll(conn);
	     if(list.size()==0){
	     session.setAttribute("list", list);
	     response.sendRedirect("inshopping_all.jsp");
	     }else{
	    	 ListPage listpage = new ListPage(list, pagenumber, 15);
				int lastpagenumber = listpage.getLastPageNumber();
				if (pagenumber >= lastpagenumber) {
					pagenumber = lastpagenumber;
				}
				List list1 = (List) listpage.getThisPageElements();
				
				session.setAttribute("lastpagenumber", lastpagenumber);
				session.setAttribute("pagenumber", pagenumber);
				session.setAttribute("list", list1);
				 response.sendRedirect("inshopping_all.jsp");
	    	 
	     }
	}

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

}