本文介紹了JSP編程技術(shù)實現(xiàn)一個簡單的購物車程序,具體如下:
1 問題描述
利用JSP編程技術(shù)實現(xiàn)一個簡單的購物車程序,具體要求如下。
(1)用JSP編寫一個登錄頁面,登錄信息中有用戶名和密碼,分別用兩個按鈕來提交和重置登錄信息。
(2)編寫一個JSP程序來獲取用戶提交的登錄信息并查詢數(shù)據(jù)庫,如果用戶名為本小組成員的名字且密碼為對應(yīng)的學(xué)號時,采用JSP內(nèi)置對象的方法跳轉(zhuǎn)到訂購頁面(顯示店中商品的種類和單價等目錄信息);否則采用JSP動作提示用戶重新登錄(注:此頁面上要包含前面的登錄界面)。
(3)當顧客填好所需商品的數(shù)量并點擊提交按鈕時,將前面訂購的商品放入購物車中并顯示購物車里的相關(guān)信息,包括商品的名稱和數(shù)量以及所有商品的總價格。
(4)將商品信息寫入數(shù)據(jù)庫,計算價格時通過查找數(shù)據(jù)庫來完成。
以下功能選做:
(5) 實現(xiàn)一個簡單的注冊功能,使新用戶能夠?qū)⒆约旱男畔ⅲㄐ彰蛯W(xué)號)寫進數(shù)據(jù)庫,以供后面登錄時使用
(6)將數(shù)據(jù)庫的相關(guān)操作改寫成一個JavaBean
2 解決方案
2.1 實現(xiàn)功能
(1)用戶登錄。(通過查詢MongoDB數(shù)據(jù)庫,完成登錄認證)
(2)用戶注冊。(通過寫入MongoDB數(shù)據(jù)庫,完成用戶注冊)
(3)記住密碼。(通過使用Cookie,實現(xiàn)記住首頁用戶名和密碼功能)
(4)查看商品。(通過查詢MongoDB數(shù)據(jù)庫,返回商品具體信息,并顯示在客戶端界面)
(5)購買商品。
(6)購物車。(顯示用戶購買商品具體信息,刪除已購買商品或添加已購買商品數(shù)量,計算用戶當前購買商品總價格)
2.2 最終運行效果圖
2.3 系統(tǒng)功能框架示意圖
圖一:系統(tǒng)功能框架示例圖
具體解釋:
(1)瀏覽器中打開首頁login.jsp用戶登錄頁面;
(2)點擊創(chuàng)建新用戶按鈕,進入register.jsp用戶注冊頁面;
(3)注冊失敗則停留在register.jsp原頁面;注冊成功則跳轉(zhuǎn)到register_success.jsp注冊成功提示頁面,點擊返回按鈕,返回到登陸首頁login.jsp頁面;
(4)在首頁login.jsp頁面輸入用戶名和密碼,請求發(fā)送到login_action.jsp登陸處理腳本頁,數(shù)據(jù)匹配成功跳轉(zhuǎn)到welcome.jsp購物首頁頁面,否則跳轉(zhuǎn)到登陸視頻login_Fail.jsp頁面;
(5)進入welcome.jsp購物首頁頁面后,點擊下一頁和上一頁按鈕,可以查看當前商品信息;同一商品點擊一次購買按鈕實現(xiàn)購買一件商品,點擊多次則實現(xiàn)購買多件商品;點擊查看購物車按鈕,實現(xiàn)內(nèi)部跳轉(zhuǎn)到Cart.jsp購物車頁面,可以產(chǎn)看當前購買商品編號、名稱、價格、購買數(shù)目以及所有商品總價格信息,并提供刪除已購買商品和添加已購買商品數(shù)目功能;
(6)購物首頁welcom.jsp頁面由header.jsp、main_shop.jsp、bottom.jsp三個頁面組成,具體如下圖二所示:
圖二:購物首頁welcome.jsp頁面
2.4 有關(guān)MongoDB簡介及系統(tǒng)環(huán)境配置
MongoDB是NoSQL家族的一員,和當前普遍使用的關(guān)系型數(shù)據(jù)庫(例如,mysql、SQLserver等)相比來說,舍棄了其中復(fù)雜的關(guān)系及實體間的關(guān)聯(lián)。換句話說,MongoDB是一種文檔型數(shù)據(jù)庫,就和我們?nèi)粘懳臋n一樣,不用去擔心各類文檔的具體內(nèi)容也不用仔細分類整理,均可以存放在自己電腦的硬盤里。下面請看一張MongoDB與關(guān)系型數(shù)據(jù)庫名詞概念對照表:
關(guān)系型數(shù)據(jù)庫 |
MongoDB |
database(數(shù)據(jù)庫) |
database(數(shù)據(jù)庫) |
table(表) |
collection(集合) |
row(行) |
document(文檔) |
column(列) |
filed(域) |
index(索引) |
index(索引) |
table joins(表關(guān)系) |
無 |
primary key(主鍵) |
自動將_id字段設(shè)置為主鍵 |
由上表可知,在我們熟悉的關(guān)系型數(shù)據(jù)庫中,具體的實體表對應(yīng)MongoDB中的集合,表中的行對應(yīng)MongoDB集合中的文檔,表中的列對應(yīng)MongoDB文檔中的域,最關(guān)鍵的主鍵在MongoDB中是系統(tǒng)自動生成,MongoDB自動的生成的主鍵是按照特定的方法來生成,具體有12個字節(jié),12字節(jié)按照如下方式生成:
0|1|2|3 | 4|5|6 | 7|8 | 9|10|11
時間戳 | 機器 | PID | 計數(shù)器
以上是個人初步學(xué)習(xí)MongoDB的介紹,如有錯誤,歡迎各位圓友指正。
說完了概念,就要到具體運用,MongoDB中存入和讀取的數(shù)據(jù)格式均為BSON格式,BSON格式是一種類似JSON格式的數(shù)據(jù),其具體樣式如下所示:
/* 7 createdAt:2016/11/22 下午3:52:51*/ { "_id" : ObjectId("5833f953e9d60125601a8c8b"), "sid" : "7", "sname" : "紅米Note4", "sprice" : "899" }, /* 8 createdAt:2016/11/22 下午3:53:19*/ { "_id" : ObjectId("5833f96fe9d60125601a8c8c"), "sid" : "8", "sname" : "平凡的世界", "sprice" : "99" }, /* 9 createdAt:2016/11/22 下午3:53:43*/ { "_id" : ObjectId("5833f987e9d60125601a8c8d"), "sid" : "9", "sname" : "斗羅大陸", "sprice" : "199" },
當我們從MongoDB數(shù)據(jù)庫查詢獲取數(shù)據(jù)后,其格式為BSON格式,不能直接與客戶端獲取的數(shù)據(jù)進行匹配。在這里,我在獲取數(shù)據(jù)庫中BSON格式數(shù)據(jù)后,調(diào)用MongoDB驅(qū)動包中BSON.toMap()方法,把BSON格式轉(zhuǎn)換為Map鍵值對格式的字符串,然后調(diào)用Map中Map.get(“name”)方法,獲取其中具體鍵值對的值,從而實現(xiàn)與客戶端頁面中數(shù)據(jù)的匹配。
最后,最關(guān)鍵的一點就是,在新建項目中導(dǎo)入MongoDB驅(qū)動包,方便客戶端和業(yè)務(wù)層操作數(shù)據(jù)庫。這里我使用的是mongo-java-driver-3.3.0.jar包,其各版本驅(qū)動包下載鏈接:http://central.maven.org/maven2/org/mongodb/mongo-java-driver/
2.5 核心功能代碼講解
(1)用戶登錄功能
實現(xiàn)用戶登錄,主要是由login_action.jsp腳本中代碼來實現(xiàn),代碼中已給出具體注釋,具體如下:
%@ page language="java" import="java.util.*,com.mongodb.*" pageEncoding="UTF-8"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>My JSP 'login_action.jsp' starting page/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="description" content="This is my page"> !-- link rel="stylesheet" type="text/css" href="styles.css"> --> /head> body> % response.setContentType("text/html;charset=utf-8"); //確保顯示的漢字信息以正確編碼方式顯示 request.setCharacterEncoding("utf-8"); //確保獲取的漢字信息以正確編碼方法獲取 String userName=(String)request.getParameter("username"); //獲取登錄頁面用戶名 String passWord=(String)request.getParameter("password");//獲取登陸頁面密碼 String checkBox = request.getParameter("save_password");//獲取登陸頁面記住密碼選擇框?qū)傩灾? boolean login_test = false; //設(shè)定登陸布爾值,若用戶名和密碼成功匹配,則為true try{ // 連接到 mongodb 服務(wù) MongoClient mongoClient = new MongoClient( "localhost" , 27017 ); //此處采用無用戶名和密碼驗證方式登陸 @SuppressWarnings("deprecation") DB db = mongoClient.getDB( "library" ); //連接到數(shù)據(jù)庫library DBCollection coll = db.getCollection("userInfo"); //獲取library數(shù)據(jù)庫中集合userInfo System.out.println("Collection userInfo selected successfully"); DBCursor cursor = coll.find(); //查詢集合userInfo中文檔信息 int i=1; while (cursor.hasNext()) { //檢索集合userInfo中所有文檔信息 System.out.println("userInfo Document: "+i); DBObject show = cursor.next(); System.out.println(show); @SuppressWarnings("rawtypes") Map show1 = show.toMap(); //將檢索結(jié)果show(Bson類型)轉(zhuǎn)換為Map類型 String toname = (String)show1.get("username"); //提取Map中字段名為username的屬性值 String topassword = (String)show1.get("password"); //提取Map中字段名為password的屬性值 if(toname.equals(userName) topassword.equals(passWord)){ //將從數(shù)據(jù)庫中獲取的用戶名和密碼與表單中獲取的數(shù)據(jù)進行驗證,匹配成功則使login_test值為true System.out.println("登陸成功?。。。?!"+"username:"+toname+" password:"+topassword); //request.getRequestDispatcher("welcome.jsp").forward(request, response); login_test = true; } System.out.println(show1.get("username")); i++; } }catch(Exception e){ System.err.println( e.getClass().getName() + ": " + e.getMessage() ); } if(login_test) { if ("save".equals(checkBox)) { //Cookie存取時用URLEncoder.encode進行編碼(PS:讀取時URLDecoder.decode進行解碼) String name1 = java.net.URLEncoder.encode(userName,"UTF-8"); //創(chuàng)建兩個Cookie對象 Cookie nameCookie = new Cookie("username", name1); //設(shè)置Cookie的有效期為3天 nameCookie.setMaxAge(60 * 60 * 24 * 3); String pwd = java.net.URLEncoder.encode(passWord,"UTF-8"); Cookie pwdCookie = new Cookie("password", pwd); pwdCookie.setMaxAge(60 * 60 * 24 * 3); response.addCookie(nameCookie); response.addCookie(pwdCookie); } // request.getRequestDispatcher("welcome.jsp").forward(request, response); response.sendRedirect("welcome.jsp"); } else{ response.sendRedirect("login_Fail.jsp"); // request.getRequestDispatcher("loginFail.jsp").forward(request, response); } %> /body> /html>
(2)用戶注冊功能
用戶注冊功能實現(xiàn)原理基本和用戶登錄一致,唯一的區(qū)別在于用戶登錄是查詢數(shù)據(jù)庫,而用戶注冊是寫入數(shù)據(jù)庫,此處就不貼具體代碼,在下面具體編碼中展示。
(3)記住密碼功能
實現(xiàn)記住密碼,此處使用兩個Cookie,當用戶正確登錄時,Cookie_one獲取用戶名,并添加到當前瀏覽器Cookie中,Cookie_two獲取密碼,也添加到當前瀏覽器Cookie中。在登錄首頁用戶名和密碼兩個輸入框中的value值填寫系統(tǒng)從Cookie中獲取的用戶名和密碼,從而實現(xiàn)記住密碼功能。具體如下:
if(login_test) { if ("save".equals(checkBox)) { //Cookie存取時用URLEncoder.encode進行編碼(PS:讀取時URLDecoder.decode進行解碼) String name1 = java.net.URLEncoder.encode(userName,"UTF-8"); //創(chuàng)建兩個Cookie對象 Cookie nameCookie = new Cookie("username", name1); //設(shè)置Cookie的有效期為3天 nameCookie.setMaxAge(60 * 60 * 24 * 3); String pwd = java.net.URLEncoder.encode(passWord,"UTF-8"); Cookie pwdCookie = new Cookie("password", pwd); pwdCookie.setMaxAge(60 * 60 * 24 * 3); response.addCookie(nameCookie); response.addCookie(pwdCookie); } // request.getRequestDispatcher("welcome.jsp").forward(request, response); response.sendRedirect("welcome.jsp"); } else{ response.sendRedirect("login_Fail.jsp"); // request.getRequestDispatcher("loginFail.jsp").forward(request, response); }
%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; String username = ""; String password = ""; //獲取當前站點的所有Cookie Cookie[] cookies = request.getCookies(); for (int i = 0; i cookies.length; i++) { //對cookies中的數(shù)據(jù)進行遍歷,找到用戶名、密碼的數(shù)據(jù) if ("username".equals(cookies[i].getName())) { //讀取時URLDecoder.decode進行解碼(PS:Cookie存取時用URLEncoder.encode進行編碼) username = java.net.URLDecoder.decode(cookies[i].getValue(),"UTF-8"); } else if ("password".equals(cookies[i].getName())) { password = java.net.URLDecoder.decode(cookies[i].getValue(),"UTF-8"); } } %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>登陸頁面/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="content-type" content="text/html; charset=UTF-8"> meta http-equiv="description" content="This is my page"> link rel="stylesheet" type="text/css" href="css/login.css"> /head> body> div class="content"> div class="head"> h1>簡單購物車/h1> /div> !-- 登錄面板 --> div class="panel"> form action="login_action.jsp" method="post"> !-- 賬號和密碼組 --> div class="group"> label>賬號/label> input type="text" placeholder="請輸入賬號" name="username" value="%=username%>"> /div> div class="group"> label>密碼/label> input type="password" placeholder="請輸入密碼" name="password" value="%=password%>"> /div> div> input type="checkbox" value="save" name="save_password"> label>記住密碼/label> /div> div class="group"> label>/label> /div> !-- 登錄按鈕 --> div class="login"> button type="submit" name="login">登陸/button> button type="reset" name="reset">重置/button> /div> /form> /div> !-- 注冊按鈕 --> div class="register"> button onclick="window.location.href='register.jsp'">創(chuàng)建新賬號/button> /div> /div> /body> /html>
(4)查詢商品和購買商品
此處功能主要是操作MongoDB數(shù)據(jù)庫,返回商品的具體信息,只要弄懂用戶登錄功能后,此處的功能代碼就會很快弄明白,具體代碼在后面展示。
(5)購物車
此處的功能也是主要操作MongoDB數(shù)據(jù),通過和客戶端的用戶交互,實現(xiàn)購物車相關(guān)功能,具體代碼在后面展示。
2.6 具體編碼
具體編碼的講解,就按照實現(xiàn)功能大致順序來介紹,具體如下:
2.6.1用戶登錄和記住密碼
首先看是登錄首頁login.jsp頁面,為了顯示美觀,此物使用一個login.css文件(后面多個頁面均是使用login.css文件)。login.css具體代碼如下:
@CHARSET "UTF-8"; /*按照樣圖要求,添加一個淺灰色背景*/ body{ background-color: #F2F2F2; } /*設(shè)置內(nèi)容模塊距離頂部一個有一段距離100px*/ .content { margin-top: 80px; } /*登錄和注冊按鈕的整體樣式*/ .content button { height: 30px;/*登錄和注冊按鈕的高度*/ color: white;/*登錄和注冊按鈕字體顏色為白色*/ font-size: 18px;/*登錄和注冊按鈕的字體大小*/ border: 0px;/*無邊框*/ padding: 0px;/*無內(nèi)邊距*/ cursor: pointer;/*登錄和注冊按鈕的選擇時為手形狀*/ } /*頭部名稱*/ .content .head { text-align: center;/*子內(nèi)容居中*/ } /*登錄面板*/ .content .panel { background-color: white;/*登錄面板背景顏色為白色*/ width: 302px;/*寬度為302px*/ text-align: center;/*子內(nèi)容居中*/ margin: 0px auto;/*自身居中*/ padding-top: 10px;/*頂部的內(nèi)邊距為20px*/ padding-bottom: 10px;/*底部的內(nèi)邊距為20px*/ border: 1px solid #ddd;/*邊框顏色為灰色*/ border-radius: 5px;/*邊框邊角有5px的弧度*/ } /*購物主頁購物面板*/ .content .panel1 { background-color: white;/*購物主頁面板背景顏色為白色*/ width: 1000px;/*寬度為600px*/ text-align: center;/*子內(nèi)容居中*/ margin: 0px auto;/*自身居中*/ border: 1px solid #ddd;/*邊框顏色為灰色*/ border-radius: 5px;/*邊框邊角有5px的弧度*/ } /*登錄和密碼組*/ .content .panel .group { text-align: left;/*子內(nèi)容居中*/ width: 262px;/*寬度為262px*/ margin: 0px auto 20px;/*自身居中,并距離底部有20px的間距*/ } .content .panel .group label { line-height: 30px;/*高度為30px*/ font-size: 18px;/*字體大小為18px*/ } .content .panel .group input { display: block;/*設(shè)置為塊,是為了讓輸入框獨占一行*/ width: 250px;/*寬度為250px*/ height: 30px;/*高度為30px*/ border: 1px solid #ddd;/*輸入框的邊框*/ padding: 0px 0px 0px 10px;/*左邊內(nèi)邊距為10px,顯得美觀*/ font-size: 16px;/*字體大小*/ } .content .panel .group input:focus{ border-left: 1px solid #CC865E;/*當輸入框成為焦點時,左邊框顏色編程褐色*/ } .content .panel .login button { background-color: #CC865E;/*按鈕的背景顏色*/ width: 130px;/*按鈕的寬度*/ } .content .panel .login button:hover { background-color: white;/*按鈕選中后背景顏色為白色*/ color: #CC865E;/*按鈕選中后字體顏色為褐色*/ border: 1px solid #CC865E;/*按鈕選中后邊框顏色為褐色*/ } /*注冊按鈕*/ .content .register { text-align: center;/*子內(nèi)容居中*/ margin-top: 20px;/*頂部的內(nèi)邊距為20px*/ } .content .register button { background-color: #466BAF;/*按鈕的背景顏色為藍色*/ width: 180px;/*按鈕的寬度*/ } .content .register button:hover { background-color: white;/*按鈕選中后背景顏色為白色*/ color: #466BAF;/*按鈕選中后字體顏色為藍色*/ border: 1px solid #466BAF;/*按鈕選中后邊框顏色為藍色*/ }
Login.jsp具體代碼如下:
%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; String username = ""; String password = ""; //獲取當前站點的所有Cookie Cookie[] cookies = request.getCookies(); for (int i = 0; i cookies.length; i++) { //對cookies中的數(shù)據(jù)進行遍歷,找到用戶名、密碼的數(shù)據(jù) if ("username".equals(cookies[i].getName())) { //讀取時URLDecoder.decode進行解碼(PS:Cookie存取時用URLEncoder.encode進行編碼) username = java.net.URLDecoder.decode(cookies[i].getValue(),"UTF-8"); } else if ("password".equals(cookies[i].getName())) { password = java.net.URLDecoder.decode(cookies[i].getValue(),"UTF-8"); } } %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>登陸頁面/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="content-type" content="text/html; charset=UTF-8"> meta http-equiv="description" content="This is my page"> link rel="stylesheet" type="text/css" href="css/login.css"> /head> body> div class="content"> div class="head"> h1>簡單購物車/h1> /div> !-- 登錄面板 --> div class="panel"> form action="login_action.jsp" method="post"> !-- 賬號和密碼組 --> div class="group"> label>賬號/label> input type="text" placeholder="請輸入賬號" name="username" value="%=username%>"> /div> div class="group"> label>密碼/label> input type="password" placeholder="請輸入密碼" name="password" value="%=password%>"> /div> div> input type="checkbox" value="save" name="save_password"> label>記住密碼/label> /div> div class="group"> label>/label> /div> !-- 登錄按鈕 --> div class="login"> button type="submit" name="login">登陸/button> button type="reset" name="reset">重置/button> /div> /form> /div> !-- 注冊按鈕 --> div class="register"> button onclick="window.location.href='register.jsp'">創(chuàng)建新賬號/button> /div> /div> /body> /html>
登錄處理腳本login_action.jsp代碼如下:
%@ page language="java" import="java.util.*,com.mongodb.*" pageEncoding="UTF-8"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>My JSP 'login_action.jsp' starting page/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="description" content="This is my page"> !-- link rel="stylesheet" type="text/css" href="styles.css"> --> /head> body> % response.setContentType("text/html;charset=utf-8"); //確保顯示的漢字信息以正確編碼方式顯示 request.setCharacterEncoding("utf-8"); //確保獲取的漢字信息以正確編碼方法獲取 String userName=(String)request.getParameter("username"); //獲取登錄頁面用戶名 String passWord=(String)request.getParameter("password");//獲取登陸頁面密碼 String checkBox = request.getParameter("save_password");//獲取登陸頁面記住密碼選擇框?qū)傩灾? boolean login_test = false; //設(shè)定登陸布爾值,若用戶名和密碼成功匹配,則為true try{ // 連接到 mongodb 服務(wù) MongoClient mongoClient = new MongoClient( "localhost" , 27017 ); //此處采用無用戶名和密碼驗證方式登陸 @SuppressWarnings("deprecation") DB db = mongoClient.getDB( "library" ); //連接到數(shù)據(jù)庫library DBCollection coll = db.getCollection("userInfo"); //獲取library數(shù)據(jù)庫中集合userInfo System.out.println("Collection userInfo selected successfully"); DBCursor cursor = coll.find(); //查詢集合userInfo中文檔信息 int i=1; while (cursor.hasNext()) { //檢索集合userInfo中所有文檔信息 System.out.println("userInfo Document: "+i); DBObject show = cursor.next(); System.out.println(show); @SuppressWarnings("rawtypes") Map show1 = show.toMap(); //將檢索結(jié)果show(Bson類型)轉(zhuǎn)換為Map類型 String toname = (String)show1.get("username"); //提取Map中字段名為username的屬性值 String topassword = (String)show1.get("password"); //提取Map中字段名為password的屬性值 if(toname.equals(userName) topassword.equals(passWord)){ //將從數(shù)據(jù)庫中獲取的用戶名和密碼與表單中獲取的數(shù)據(jù)進行驗證,匹配成功則使login_test值為true System.out.println("登陸成功?。。。?!"+"username:"+toname+" password:"+topassword); //request.getRequestDispatcher("welcome.jsp").forward(request, response); login_test = true; } System.out.println(show1.get("username")); i++; } }catch(Exception e){ System.err.println( e.getClass().getName() + ": " + e.getMessage() ); } if(login_test) { if ("save".equals(checkBox)) { //Cookie存取時用URLEncoder.encode進行編碼(PS:讀取時URLDecoder.decode進行解碼) String name1 = java.net.URLEncoder.encode(userName,"UTF-8"); //創(chuàng)建兩個Cookie對象 Cookie nameCookie = new Cookie("username", name1); //設(shè)置Cookie的有效期為3天 nameCookie.setMaxAge(60 * 60 * 24 * 3); String pwd = java.net.URLEncoder.encode(passWord,"UTF-8"); Cookie pwdCookie = new Cookie("password", pwd); pwdCookie.setMaxAge(60 * 60 * 24 * 3); response.addCookie(nameCookie); response.addCookie(pwdCookie); } // request.getRequestDispatcher("welcome.jsp").forward(request, response); response.sendRedirect("welcome.jsp"); } else{ response.sendRedirect("login_Fail.jsp"); // request.getRequestDispatcher("loginFail.jsp").forward(request, response); } %> /body> /html>
登錄失敗login_Fail.jsp頁面代碼如下:
%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>登陸失敗/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="description" content="This is my page"> link rel="stylesheet" type="text/css" href="css/login.css"> /head> body> div class="content"> div class="panel1"> h1>輸入用戶名和密碼不正確,請重新登陸!??!/h1> /div> div class="register"> button onclick="window.location.href='login.jsp'">返回/button> /div> /div> /body> /html>
2.6.2用戶注冊
注冊首頁register.jsp頁面代碼如下:
%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>注冊頁面/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="content-type" content="text/html; charset=UTF-8"> meta http-equiv="description" content="This is my page"> link rel="stylesheet" type="text/css" href="css/login.css"> Script Language="JavaScript"> function check() { var tmp,str; str=document.myform.password1.value; tmp=document.myform.password2.value; if(str != tmp) alert("兩次密碼輸入不一致,請重新確認密碼!??!"); } /Script> /head> body> div class="content"> div class="head"> h1>歡迎來到簡單購物車系統(tǒng)注冊頁面/h1> /div> !-- 注冊面板 --> div class="panel"> form name="myform" action="register_action.jsp" method="post"> !-- 賬號和密碼組 --> div class="group"> label>/label> input type="text" placeholder="請輸入注冊賬號" name="username1"> /div> div class="group"> label>/label> input type="password" placeholder="請輸入注冊密碼" name="password1"> /div> div class="group"> label>/label> input type="password" placeholder="請確認注冊密碼" name="password2"> /div> !-- 注冊按鈕 --> div class="login"> button type="submit" name="register" onclick="check()">注冊/button> button type="reset" name="reset1">重置/button> /div> /form> div class="register"> button onclick="window.location.href='login.jsp'">返回/button> /div> /div> /div> /body> /html>
注冊處理腳本register_action.jsp代碼如下;
%@ page language="java" import="java.util.*,com.mongodb.*" pageEncoding="UTF-8"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; String text_change = "等待注冊"; %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>My JSP 'register_action.jsp' starting page/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> meta http-equiv="description" content="This is my page"> /head> body> % response.setContentType("text/html;charset=utf-8"); //確保顯示的漢字信息以正確編碼方式顯示 request.setCharacterEncoding("utf-8"); //確保獲取的漢字信息以正確編碼方法獲取 String userName1=(String)request.getParameter("username1"); //獲取頁面用戶名 String passWord1=(String)request.getParameter("password1");//獲取注冊頁面密碼1 String passWord2=(String)request.getParameter("password2");//獲取注冊頁面密碼2 if(!passWord1.equals(passWord2)){ //如果用戶兩次輸入密碼不一致,則跳轉(zhuǎn)到注冊原頁面register.jsp,即實現(xiàn)未跳轉(zhuǎn)效果 response.sendRedirect("register.jsp"); } try{ // 連接到 mongodb 服務(wù) MongoClient mongoClient = new MongoClient( "localhost" , 27017 ); //此處采用無用戶名和密碼驗證方式登陸 @SuppressWarnings("deprecation") DB db = mongoClient.getDB( "library" ); //連接到數(shù)據(jù)庫library DBCollection coll = db.getCollection("userInfo"); //獲取library數(shù)據(jù)庫中集合userInfo System.out.println("Collection userInfo selected successfully"); DBObject user = new BasicDBObject();//定義一個Bson變量,用于存儲注冊的用戶名和密碼 user.put("username", userName1); user.put("password", passWord1); coll.insert(user); //向集合userInfo中插入注冊用戶信息 response.sendRedirect("register_success.jsp"); //注冊成功后,自動跳轉(zhuǎn)到注冊成功提示頁面 }catch(Exception e){ System.err.println( e.getClass().getName() + ": " + e.getMessage() ); } %> /body> /html>
成功注冊提示頁面register_success.jsp頁面代碼如下:
%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>注冊成功/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="description" content="This is my page"> link rel="stylesheet" type="text/css" href="css/login.css"> /head> body> div class="content"> div class="panel1"> h1>恭喜您,您已經(jīng)成功注冊簡單購物車系統(tǒng)/h1> /div> div class="register"> button onclick="window.location.href='login.jsp'">返回/button> /div> /div> /body> /html>
2.6.3查看商品
首先看一下購物首頁welcome.jsp頁面代碼:
%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>購物頁面/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="description" content="This is my page"> !-- link rel="stylesheet" type="text/css" href="styles.css"> --> /head> frameset rows="30%,60%,10%" cols="*" frameborder="no" border="0" framespacing="0"> frame src="header.jsp"> frame src="main_shop.jsp"> frame src="bottom.jsp"> /frameset> body> /body> /html>
首頁頭部header.jsp頁面代碼:
%@ page language="java" import="java.util.*" contentType="text/html;charset=gb2312" pageEncoding="gb2312"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="description" content="This is my page"> meta http-equiv="Content-Type" content="text/html;charset=gb2312"> /head> body topmargin="0" leftmargin="0" rightmargin="0" style="background-color: #F2F2F2;overflow-x:hidden;overflow-y:hidden"> form action=""> table width="100%" height="79" border="0" cellpadding="0" cellspacing="0" align=center> tr> td bgcolor="F9A859" valign="top"> table width="100%" height="100" border="0" align="center" cellpadding="0" cellspacing="0" bgcolor="#466BAF"> tr> td align="center" style="font-size:60px;color: white;"> 簡單購物車系統(tǒng) /td> /tr> /table> /td> /tr> tr> td bgcolor="F9A859" valign="top"> table width="100%" height="50" border="0" align="center" cellpadding="0" cellspacing="0" bgcolor="#CC865E"> tr> td align="center" style="font-size:20px;color: white;"> 歡迎你訪問!/td> /tr> /table> /td> /tr> /table> /form> /body> /html>
尾部bottom.jsp頁面代碼:
%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>My JSP 'bottom.jsp' starting page/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="description" content="This is my page"> /head> body style="background-color: #F2F2F2;overflow-x:hidden;overflow-y:hidden"> hr> h4 style="width:100%;text-align:center">Copyright @2016 舞動的心/h4> /body> /html>
首頁中間主體main_shop.jsp頁面代碼;
%@ page contentType="text/html;charset=GBK" import="java.util.*,com.liuzhen.shop.MongodbBean" %> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; String cp=request.getParameter("cp");//cp為分頁數(shù) //int page_number = DBBean.getTotalPage(); //int currpage = page_number; int currpage=(cp==null||cp=="")?1:Integer.parseInt(cp); String[][] ss = MongodbBean.getGoodList(currpage); int n = MongodbBean.getlength(ss); %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>購物頁面/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="description" content="This is my page"> link rel="stylesheet" type="text/css" href="css/login.css"> /head> body style="overflow-x:hidden;overflow-y:hidden"> div class="content"> div class="panel1"> table border="1" align="center"> tr> th width="30%" align="center">物品編號/th> th width="30%" align="center">物品名/th> th width="30%" align="center">定價/th> th width="50%" align="center">求購/th> /tr> % for(int i=0;in;i++) { %> tr> td height="30%" align="center">%= ss[i][0] %>/td> td height="30%" align="center">%= ss[i][1] %>/td> td height="30%" align="center">%= ss[i][2] %>/td> td height="30%" align="center">a href="Buy.jsp?sid=%= ss[i][0] %>action=buy">購買/a>/td> /tr> % } %> /table> % int tp=MongodbBean.getTotalPage(); if(currpage!=1) { %> a href="main_shop.jsp?cp=%=currpage-1%>">上一頁/a> % } if(currpage!=tp) { %> a href="main_shop.jsp?cp=%=currpage+1%>">下一頁/a> % } %> form action="main_shop.jsp" name="myform"> select name="cp" onchange="document.myform.submit()"> % for(int i=1;i=tp;i++) { %> option value="%=i%>" %= (i==currpage)?"selected":"" %>>第%=i%>頁/option> % } %> /select> /form> /div> div class="register"> button onclick="window.location.href='Cart.jsp'">查看購物車/button> /div> /div> /body> /html>
實現(xiàn)查看商品的功能,主要是通過調(diào)用MongodbBean.java類來實現(xiàn),其具體代碼如下:
package com.liuzhen.shop; import java.util.Map; import java.util.Vector; import com.mongodb.*; public class MongodbBean { static int span=5; //設(shè)定JSP頁面表單單頁顯示物品信息行數(shù)為5行 //返回數(shù)據(jù)庫中全部貨物編號sid public static String[] getGood_sid(){ String[] good_sid_temporary = new String[100]; //定義一個長度為100的暫時存放貨物編號的一維數(shù)組 // 連接到 mongodb 服務(wù) MongoClient mongoClient = new MongoClient( "localhost" , 27017 ); //此處采用無用戶名和密碼驗證方式登陸 @SuppressWarnings("deprecation") DB db = mongoClient.getDB( "library" ); //連接到數(shù)據(jù)庫library DBCollection coll = db.getCollection("good"); //獲取library數(shù)據(jù)庫中集合good System.out.println("Collection userInfo selected successfully"); DBCursor cursor = coll.find(); //查詢集合good中文檔信息 int i=0; while (cursor.hasNext()) { //檢索集合good中所有文檔信息 DBObject show = cursor.next(); @SuppressWarnings("rawtypes") Map show1 = show.toMap(); //將檢索結(jié)果show(Bson類型)轉(zhuǎn)換為Map類型 String tosid = (String)show1.get("sid"); //提取Map中字段名為sid的屬性值 good_sid_temporary[i] = tosid; //將數(shù)據(jù)庫中查詢的貨物編號存儲入數(shù)組good_sid i++; } String[] good_sid = new String[i]; //根據(jù)查詢數(shù)據(jù)遍歷集合中文檔信息i值來確定最終返回數(shù)組長度 for(int j=0;ji;j++){ good_sid[j] = good_sid_temporary[j]; } return good_sid; } //返回數(shù)據(jù)庫中全部貨物名稱sname public static String[] getGood_sname(){ String[] good_sname_temporary = new String[100]; //定義一個長度為100的暫時存放貨物名稱的一維數(shù)組 // 連接到 mongodb 服務(wù) MongoClient mongoClient = new MongoClient( "localhost" , 27017 ); //此處采用無用戶名和密碼驗證方式登陸 @SuppressWarnings("deprecation") DB db = mongoClient.getDB( "library" ); //連接到數(shù)據(jù)庫library DBCollection coll = db.getCollection("good"); //獲取library數(shù)據(jù)庫中集合good System.out.println("Collection userInfo selected successfully"); DBCursor cursor = coll.find(); //查詢集合good中文檔信息 int i=0; while (cursor.hasNext()) { //檢索集合good中所有文檔信息 DBObject show = cursor.next(); @SuppressWarnings("rawtypes") Map show1 = show.toMap(); //將檢索結(jié)果show(Bson類型)轉(zhuǎn)換為Map類型 String tosname = (String)show1.get("sname"); //提取Map中字段名為sname的屬性值 good_sname_temporary[i] = tosname; //將數(shù)據(jù)庫中查詢的貨物名稱存儲入數(shù)組good_sname i++; } String[] good_sname = new String[i]; //根據(jù)查詢數(shù)據(jù)遍歷集合中文檔信息i值來確定最終返回數(shù)組長度 for(int j=0;ji;j++){ good_sname[j] = good_sname_temporary[j]; } return good_sname; } //返回數(shù)據(jù)庫中全部貨物價格sprice public static String[] getGood_sprice(){ String[] good_sprice_temporary = new String[100]; //定義一個長度為100的暫時存放貨物價格的一維數(shù)組 // 連接到 mongodb 服務(wù) MongoClient mongoClient = new MongoClient( "localhost" , 27017 ); //此處采用無用戶名和密碼驗證方式登陸 @SuppressWarnings("deprecation") DB db = mongoClient.getDB( "library" ); //連接到數(shù)據(jù)庫library DBCollection coll = db.getCollection("good"); //獲取library數(shù)據(jù)庫中集合good System.out.println("Collection userInfo selected successfully"); DBCursor cursor = coll.find(); //查詢集合good中文檔信息 int i=0; while (cursor.hasNext()) { //檢索集合good中所有文檔信息 DBObject show = cursor.next(); @SuppressWarnings("rawtypes") Map show1 = show.toMap(); //將檢索結(jié)果show(Bson類型)轉(zhuǎn)換為Map類型 String tosprice = (String)show1.get("sprice"); //提取Map中字段名為sname的屬性值 good_sprice_temporary[i] = tosprice; //將數(shù)組庫中查詢的貨物價格存儲入數(shù)組good_sprice i++; } String[] good_sprice = new String[i]; //根據(jù)查詢數(shù)據(jù)遍歷集合中文檔信息i值來確定最終返回數(shù)組長度 for(int j=0;ji;j++){ good_sprice[j] = good_sprice_temporary[j]; } return good_sprice; } //根據(jù)分頁當前page數(shù),從數(shù)據(jù)庫中獲取當前單個頁面貨物種類的具體信息,并以二維數(shù)據(jù)返回具體信息 public static String[][] getGoodList(int page) { String[][] result=null; VectorString[]> v=new VectorString[]>(); //定義一個Vector集合,一個記錄存放一個貨物的具體信息 String[] good_sid = getGood_sid(); //獲取貨物編號 String[] good_sname = getGood_sname(); //獲取貨物名稱 String[] good_sprice = getGood_sprice(); //獲取貨物價格 int len = good_sid.length; for(int i=0;ispan;i++){ int t = (page-1)*span+i; //獲取貨物編號 if(t >= len){ //如果當前貨物編號大于數(shù)據(jù)庫中已有編號,則跳出循環(huán) break; } String[] good_temp=new String[3]; //定義一個長度為3的數(shù)組,用于存放一個物品的編號、名稱、價格信息 good_temp[0]=good_sid[t]; good_temp[1]=good_sname[t]; good_temp[2]=good_sprice[t]; v.add(good_temp); //將1個物品的信息存入Vector集合中 } int size = v.size(); result=new String[size][]; //根據(jù)Vercotr大小,給result指定行數(shù)大小 for(int j=0;jsize;j++) { //返回Vector中一個值(其中即表示一個物品的sid,名稱和價格),并賦值給result[j],即result二維數(shù)組一行表示一個物品具體信息 result[j]=(String[])v.elementAt(j); } return result; } //根據(jù)貨物sid,返回其價格信息 public static double getPrice(String sid) { double price = 0; //定義返回物品的價格 String[] good_sprice = getGood_sprice(); //獲取全部物品的價格 int i = Integer.parseInt(sid); //將String類型的物品編號sid轉(zhuǎn)換為int型 String sprice = good_sprice[i]; //根據(jù)sid獲取物品的價格 price = Double.parseDouble(sprice); //將String類型的價格信息轉(zhuǎn)換為double型,并賦值給price return price; } //根據(jù)貨物sid,返回貨物的名稱和價格,一一個長度為2的數(shù)組返回 public static String[] getDetail(String sid) { String[] good_detail=null; good_detail = new String[2]; String[] good_sname = getGood_sname(); //獲取全部物品名稱 String[] good_sprice = getGood_sprice(); //獲取全部物品價格 int i = Integer.parseInt(sid); //將String類型的物品編號sid轉(zhuǎn)換為int型 good_detail[0] = good_sname[i]; //根據(jù)物品編號sid,得到名稱存入數(shù)組good_detail中 good_detail[1] = good_sprice[i]; //根據(jù)物品編號sid,得到物品價格存入數(shù)組good_detail中 return good_detail; } //通過查詢數(shù)據(jù)庫中貨物種類數(shù)目,以5行為一頁,返回現(xiàn)有貨物頁數(shù) public static int getTotalPage() { int page = 0; String[] good_sid = getGood_sid(); int len = good_sid.length; page = len/span+((len%span==0)?0:1); //以span(span值為5)行為一頁,計算貨物具有的頁數(shù)page return page; } //返回一個二維數(shù)組的行數(shù)大小 public static int getlength(String[][] a){ return a.length; } public static void main(String args[]){ // String[] good_sid = getGood_sid(); //定義一個存放貨物編號的一維數(shù)組 // String[] good_sname = getGood_sname(); //定義一個存放貨物名稱的一維數(shù)組 // String[] good_sprice = getGood_sprice(); //定義一個存放貨物價格的一維數(shù)組 // // for(int j=0;j10;j++){ // System.out.println("貨物sid:"+good_sid[j]); // System.out.println("貨物sname:"+good_sname[j]); // System.out.println("貨物是price:"+good_sprice[j]); // System.out.println("**************************"); // System.out.println(); // } System.out.println("分頁數(shù)目(測試):"+MongodbBean.getTotalPage()); String[][] ss=MongodbBean.getGoodList(MongodbBean.getTotalPage()); for(int i=0;iss.length;i++) { System.out.println(ss[i][0]); System.out.println(ss[i][1]); System.out.println(ss[i][2]); System.out.println("***********"); } int n = ss.length; System.out.println("數(shù)組長度為:"+n); } }
2.6.4購買商品
實現(xiàn)購買商品,通過Buy.jsp業(yè)務(wù)處理腳本調(diào)用ShopCartBean.java類來實現(xiàn)。
ShopCartBean.java類代碼如下:
package com.liuzhen.shop; import java.util.HashMap; import java.util.Iterator; import java.util.Set; public class ShopCartBean { //ShopCartBean類構(gòu)造函數(shù) public ShopCartBean(){ } //定義一個存儲整形數(shù)值的鍵值對hashMap HashMapString, Integer> hm=new HashMapString, Integer>(); //定義購物車總物品總價格,初始值為0 double total=0; //添加購買的物品,存入哈希表hm中,并計算購買成功后的總價格 public void add(String sid) { if(hm.containsKey(sid)) { //如果hm中包含鍵值對sid,則獲取該鍵值對中的值,并加1 int xc=((Integer)hm.get(sid)).intValue()+1; //把上面獲取的xc值存入hm中 hm.put(sid,new Integer(xc));; } else { //如果hm中不包含鍵值對sid,則將該鍵值對存入hm中,并該鍵值對值為1 hm.put(sid,new Integer(1)); } total=total+MongodbBean.getPrice(sid); //購買物品后,計算物品總價格 } //獲取購物車當前物品總價格 public double getTotal() { return total; } //根據(jù)物品編號sid,設(shè)定購買物品數(shù)目,并將購買數(shù)目存入哈希表hm中,并更新當前購物車物品總價格 public void setCount(int c,String sid) { int yc=((Integer)hm.get(sid)).intValue(); total=total+(c-yc)*MongodbBean.getPrice(sid); hm.put(sid,new Integer(c)); } //根據(jù)物品編號sid,從購物車中刪除物品,并刪除存入哈希表hm中物品的數(shù)目,以及當前購物車物品總價格 public void deleteFromCart(String sid) { int yc=((Integer)hm.get(sid)).intValue(); total=total-yc*MongodbBean.getPrice(sid); hm.remove(sid); } //判斷當前哈希表hm是否為空 public boolean isEmpty() { return hm.isEmpty(); } //返回用戶購買物品的詳細信息(物品編號、物品名稱、物品價格、物品購買數(shù)量) public String[][] getCart() { //定義一個set集合,存放哈希表hm中鍵值對的鍵名稱 SetString> ks=hm.keySet(); //定義一個迭代器,用于遍歷set集合 IteratorString> ii=ks.iterator(); //獲取哈希表hm中鍵值對的個數(shù) int size=hm.size(); //定義二維數(shù)組,存放購買物品的信息 String rs[][]=new String[size][]; for(int i=0;isize;i++) { String sid=(String)ii.next(); //存放鍵值對的鍵名,即貨物的編號sid String[] sa=new String[4]; sa[0]=sid; //獲取購買貨物sid String[] sat=MongodbBean.getDetail(sid); //根據(jù)貨物sid,獲取購買貨物的名稱和價格 sa[1]=sat[0]; //獲取購買貨物名稱 sa[2]=sat[1]; //獲取購買貨物價格 sa[3]=((Integer)hm.get(sid)).toString(); //獲取購買貨物數(shù)量 rs[i]=sa; //將上述單個物品詳細存入二維數(shù)組rs中 } return rs; } }
Buy.jps購物處理腳本代碼如下:
%@ page language="java" import="java.util.*" contentType="text/html;charset=utf-8" pageEncoding="gb2312"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> jsp:useBean id="cart" scope="session" class="com.liuzhen.shop.ShopCartBean"/> % String action=request.getParameter("action"); if(action==null) { %> jsp:forward page="main_shop.jsp"/> % } else if(action.trim().equals("buy")) { String sid=request.getParameter("sid"); cart.add(sid.trim()); %> jsp:forward page="main_shop.jsp"/> % } else if(action.trim().equals("gc")) { String sid=request.getParameter("sid"); String count=request.getParameter("count"); cart.setCount(Integer.parseInt(count),sid); %> jsp:forward page="Cart.jsp"/> % } else if(action.trim().equals("del")) { String sid=request.getParameter("sid"); cart.deleteFromCart(sid); %> jsp:forward page="Cart.jsp"/> % } %> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="description" content="This is my page"> !-- link rel="stylesheet" type="text/css" href="styles.css"> --> /head> body> /body> /html>
2.6.5購物車
購物車功能,主要是用過Cart.jsp頁面調(diào)用ShopCartBean.java類來實現(xiàn),ShopCartBean.java類代碼在上面已給出,下面請看Cart.jsp購物車頁面代碼:
%@ page language="java" import="java.util.*" contentType="text/html;charset=gb2312" import="com.liuzhen.shop.MongodbBean" pageEncoding="gb2312"%> % String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> jsp:useBean id="cart" scope="session" class="com.liuzhen.shop.ShopCartBean"/> !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> html> head> base href="%=basePath%>"> title>購物車/title> meta http-equiv="pragma" content="no-cache"> meta http-equiv="cache-control" content="no-cache"> meta http-equiv="expires" content="0"> meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> meta http-equiv="description" content="This is my page"> meta http-equiv="Content-Type" content="text/html;charset=gb2312"> link rel="stylesheet" type="text/css" href="css/login.css"> /head> body> div class="content"> div class="panel1"> % if(cart.isEmpty()) { %> font color="red" size="20">購物車中沒有任何商品?。?!/Font> % } else { %> h2>購物車/h2> table border="1"> tr> td width="27%" align="center">物品編號/td> td width="27%" align="center">物品名/td> td width="27%" align="center">定價/td> td width="27%" align="center">數(shù)量/td> td width="27%" align="center">求購/td> /tr> % String[][] ssa=cart.getCart(); for(int i=0;issa.length;i++) { %> tr> td height="30%" align="center">%= ssa[i][0] %>/td> td height="30%" align="center">%= ssa[i][1] %>/td> td height="30%" align="center">%= ssa[i][2] %>/td> td> form action="Buy.jsp" method="post"> input type="text" name="count" value="%= ssa[i][3] %>"> input type="hidden" name="sid" value="%= ssa[i][0] %>"> input type="hidden" name="action" value="gc"> /form> /td> td>a href="Buy.jsp?sid=%= ssa[i][0] %>action=del">刪除/a>/td> /tr> % } %> /table> br> br> 本訂單總價為:%= Math.round(cart.getTotal()*100)/100.0%> % } %> br> div class="register"> button onclick="window.location.href='main_shop.jsp'">繼續(xù)購物/button> /div> /div> /div> /body> /html>
附:源碼下載:源碼
以上就是本文的全部內(nèi)容,希望對大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。