package?com.hxw.controller;

import?java.io.IOException;
import?java.io.PrintWriter;
import?java.util.ArrayList;

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

import?com.hxw.domain.Users;
import?com.hxw.service.*;

public?class?GoHallUI?extends?HttpServlet?{

	public?void?doGet（HttpServletRequest?request?HttpServletResponse?response）
			throws?ServletException?IOException?{

		request.setCharacterEncoding（“utf-8“）;
		response.setContentType（“text/html;charset=utf-8“）;
		PrintWriter?out?=?response.getWriter（）;
		
		
		
		//得到從登陸傳遞過來的用戶名和密碼
		String?id=request.getParameter（“id“）;
		String?p=request.getParameter（“password“）;

		//先判斷該用戶是否登錄或此用戶曾登錄的session是否已經過期
				if（request.getSession（）.getAttribute（“loginUser“）!=null）{
					//給下一個頁面準備要顯示的數據
					BookService?bookservice=new?BookService（）;
					ArrayList?al=bookservice.getAllBook（）;
					
					//把要顯示的數據放在request，原因是request的生命周期最短
					request.setAttribute（“books“?al）;
					request.getRequestDispatcher（“/WEB-INF/Hall.jsp“）.forward（request?response）;
					return;//不要往下走了！
				}
					
		//創建一個users對象
		Users?loginuser=new?Users（Integer.parseInt（id）p）;
		//使用業務邏輯類完成驗證
		UsersService?userservice=new?UsersService（）;
		if（userservice.checkUser（loginuser））{
			//說明是合法用戶，跳轉到購物大廳
			
			//因為在其他頁面可以用到用戶信息，因此把用戶信息放入session中
			request.getSession（）.setAttribute（“loginUser“?loginuser）;
			
			////當用戶登陸成功后，為他創建一個購物車
			MyCart?myCart=new?MyCart（）;
			request.getSession（）.setAttribute（“myCart“?myCart）;
			
			
			//給下一個頁面準備要顯示的數據
			BookService?bookservice=new?BookService（）;
			ArrayList?al=bookservice.getAllBook（）;
			
			//把要顯示的數據放在request，原因是request的生命周期最短
			request.setAttribute（“books“?al）;
			request.getRequestDispatcher（“/WEB-INF/Hall.jsp“）.forward（request?response）;
		}else{
			//說明不合法，返回原頁面
			request.getRequestDispatcher（“/WEB-INF/Login.jsp“）.forward（request?response）;
			
		}
		
	}

	public?void?doPost（HttpServletRequest?request?HttpServletResponse?response）
			throws?ServletException?IOException?{

		this.doGet（request?response）;
	}

}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2014-05-26?21:00??MyShopping源代碼（筆記，數據庫）\
?????目錄???????????0??2014-05-26?21:00??MyShopping源代碼（筆記，數據庫）\MyShopping\
?????文件????????1163??2014-05-17?13:45??MyShopping源代碼（筆記，數據庫）\MyShopping\.classpath
?????文件????????1335??2014-05-16?18:50??MyShopping源代碼（筆記，數據庫）\MyShopping\.project
?????目錄???????????0??2014-05-26?21:00??MyShopping源代碼（筆記，數據庫）\MyShopping\.settings\
?????文件?????????522??2014-05-16?18:31??MyShopping源代碼（筆記，數據庫）\MyShopping\.settings\.jsdtscope
?????文件?????????364??2014-05-16?18:31??MyShopping源代碼（筆記，數據庫）\MyShopping\.settings\org.eclipse.jdt.core.prefs
?????文件?????????491??2014-05-17?13:44??MyShopping源代碼（筆記，數據庫）\MyShopping\.settings\org.eclipse.wst.common.component
?????文件?????????412??2014-05-16?18:31??MyShopping源代碼（筆記，數據庫）\MyShopping\.settings\org.eclipse.wst.common.project.facet.core.xml
?????文件??????????49??2014-05-16?18:31??MyShopping源代碼（筆記，數據庫）\MyShopping\.settings\org.eclipse.wst.jsdt.ui.superType.container
?????文件???????????6??2014-05-16?18:31??MyShopping源代碼（筆記，數據庫）\MyShopping\.settings\org.eclipse.wst.jsdt.ui.superType.name
?????目錄???????????0??2014-05-26?21:00??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\
?????目錄???????????0??2014-05-26?21:00??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\meta-INF\
?????文件??????????39??2014-05-16?18:31??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\meta-INF\MANIFEST.MF
?????目錄???????????0??2014-05-26?21:00??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\
?????文件????????1938??2014-05-25?17:39??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\Hall.jsp
?????文件????????1346??2014-05-24?10:44??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\Login.jsp
?????文件????????1200??2014-05-24?10:45??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\OrderOK.jsp
?????文件????????2227??2014-05-24?10:45??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\ShowMyCart.jsp
?????目錄???????????0??2014-05-26?21:00??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\classes\
?????目錄???????????0??2014-05-26?21:00??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\classes\com\
?????目錄???????????0??2014-05-26?21:00??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\classes\com\hxw\
?????目錄???????????0??2014-05-26?21:00??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\classes\com\hxw\controller\
?????文件????????2665??2014-05-23?15:26??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\classes\com\hxw\controller\GoHallUI.class
?????文件????????2011??2014-05-23?15:21??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\classes\com\hxw\controller\GoMyOrderServlet.class
?????文件????????1929??2014-05-24?10:01??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\classes\com\hxw\controller\GoShowMycart.class
?????文件????????2818??2014-05-24?10:23??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\classes\com\hxw\controller\ShoppingCLServlet.class
?????文件????????2124??2014-05-23?21:32??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\classes\com\hxw\controller\SubmitOrderServlet.class
?????目錄???????????0??2014-05-26?21:00??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\classes\com\hxw\domain\
?????文件????????1704??2014-05-17?19:26??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\classes\com\hxw\domain\Book.class
?????文件????????1508??2014-05-17?13:57??MyShopping源代碼（筆記，數據庫）\MyShopping\WebRoot\WEB-INF\classes\com\hxw\domain\Users.class
............此處省略46個文件信息