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<div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62683f714c65f412597f20bf/bg1.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x1 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0">第<span class="ff2">15</span>章 网上书店实例</div><div class="t m0 x2 h4 y3 ff1 fs1 fc0 sc0 ls0 ws0">在本章中我们使用<span class="ff3">JSP</span>和<span class="ff3">Java Bean</span>来构建一个网上书店。本章介绍的例子可以分成两</div><div class="t m0 x3 h4 y4 ff1 fs1 fc0 sc0 ls0 ws0">大部分,第一部分是普通程序,用于客户在网上选购图书,第二部分是管理程序,用于</div><div class="t m0 x3 h4 y5 ff1 fs1 fc0 sc0 ls0 ws0">在服务器端处理客户的定单。客户端程序由以下几个部分构成:</div><div class="t m0 x2 h4 y6 ff3 fs1 fc0 sc0 ls0 ws0">default.jsp<span class="ff1">:会员登录界面</span>(<span class="ff1">首页</span>)<span class="ff1">;</span></div><div class="t m0 x2 h4 y7 ff3 fs1 fc0 sc0 ls0 ws0">checklogon.jsp<span class="ff1">:检测登录代码和密码是否一致,根据由</span>JavaBean<span class="ff1">返回的结果显示不同</span></div><div class="t m0 x3 h4 y8 ff1 fs1 fc0 sc0 ls0 ws0">的信息。</div><div class="t m0 x2 h4 y9 ff3 fs1 fc0 sc0 ls0 ws0">BuyerBean<span class="ff1">:会员的合法性检验所用的</span>Bean<span class="ff1">;</span></div><div class="t m0 x2 h4 ya ff3 fs1 fc0 sc0 ls0 ws0">booklist.jsp<span class="ff1">:给登录会员显示当前书店中可供选择的图书;</span></div><div class="t m0 x2 h4 yb ff3 fs1 fc0 sc0 ls0 ws0">addcart.jsp<span class="ff1">:将所选的图书加入购物车;</span></div><div class="t m0 x2 h4 yc ff3 fs1 fc0 sc0 ls0 ws0">shoppingcart.jsp<span class="ff1">:查看购物车的内容;</span></div><div class="t m0 x2 h4 yd ff1 fs1 fc0 sc0 ls0 ws0">本例的数据库采用<span class="ff3">Access</span>(<span class="ff3">.MDB</span>数据库),对数据库的访问采用便于理解的<span class="ff3">JDBC-</span></div><div class="t m0 x3 h4 ye ff3 fs1 fc0 sc0 ls0 ws0">ODBC<span class="ff1">方式,在使用本例前先在本地数据库建立一个</span>ODBC<span class="ff1">数据源:</span>bookstore<span class="ff1">。</span></div><div class="t m0 x2 h4 yf ff1 fs1 fc0 sc0 ls0 ws0">设置步骤如下:</div><div class="t m0 x2 h4 y10 ff1 fs1 fc0 sc0 ls0 ws0">(<span class="ff3">1<span class="_ _0"></span></span>)在<span class="_ _0"></span>开始<span class="_ _0"></span><span class="ff3">-<span class="_ _0"></span>></span>设置<span class="_ _0"></span><span class="ff3">-<span class="_ _0"></span>></span>控制<span class="_ _0"></span>面<span class="_ _0"></span>版(<span class="_ _0"></span><span class="ff3">Win98</span>、<span class="_ _0"></span><span class="ff3">N<span class="_ _0"></span>T4<span class="_ _0"></span>.0</span>)中选取<span class="_ _0"></span>“<span class="_ _0"></span>数据<span class="_ _0"></span>源(<span class="_ _0"></span><span class="ff3">O<span class="_ _0"></span>DB<span class="_ _0"></span>C</span>)”;在</div><div class="t m0 x3 h4 y11 ff3 fs1 fc0 sc0 ls0 ws0">W<span class="_ _1"></span>in 2000 Professional<span class="ff1">和</span>Server<span class="ff1">中分别位于“开始</span>-><span class="ff1">设置</span>-><span class="ff1">控制面版</span>-><span class="ff1">管理工具”和“开始</span>-><span class="ff1">程</span></div><div class="t m0 x3 h4 y12 ff1 fs1 fc0 sc0 ls0 ws0">序<span class="ff3">-></span>管理工具”下。</div><div class="t m0 x2 h4 y13 ff1 fs1 fc0 sc0 ls0 ws0">(<span class="ff3">2</span>)启动“数据源(<span class="ff3">ODBC</span>)”配置程序,界面如图<span class="_ _2"> </span><span class="ff3">15-1</span>所示。</div><div class="t m0 x4 h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">图<span class="ff2">15-1 ODBC</span>数据源管理界面</div><div class="t m0 x2 h4 y15 ff1 fs1 fc0 sc0 ls0 ws0">(<span class="_ _3"></span><span class="ff3">3<span class="_ _3"></span></span>)<span class="_ _3"></span>在<span class="_ _3"></span>图<span class="_ _4"></span><span class="ff3">1<span class="_ _3"></span>5<span class="_ _3"></span>-<span class="_ _3"></span>1<span class="_ _5"></span><span class="ff1">中<span class="_ _3"></span>“<span class="_ _3"></span>系<span class="_ _3"></span>统<span class="_ _4"></span><span class="ff3">D<span class="_ _3"></span>S<span class="_ _3"></span>N<span class="_ _5"></span><span class="ff2">”<span class="_ _3"></span><span class="ff1">选<span class="_ _3"></span>项<span class="_ _3"></span>下<span class="_ _3"></span>单<span class="_ _3"></span>击<span class="_ _4"></span>“<span class="_ _3"></span>添<span class="_ _3"></span>加<span class="_ _3"></span>”<span class="_ _3"></span>按<span class="_ _3"></span>钮<span class="_ _3"></span>,<span class="_ _4"></span>来<span class="_ _3"></span>添<span class="_ _3"></span>加<span class="_ _3"></span>一<span class="_ _3"></span>个<span class="_ _3"></span>系<span class="_ _4"></span>统<span class="_ _3"></span>的<span class="_ _3"></span>数<span class="_ _3"></span>据<span class="_ _3"></span>源</span></span></span></span></span></div><div class="t m0 x3 h4 y16 ff1 fs1 fc0 sc0 ls0 ws0">(<span class="ff3">DSN</span>),则出现如图<span class="_ _2"> </span><span class="ff3">15-2</span>所示数据源驱动程序选择界面:</div></div><div class="t m0 x5 h6 y17 ff3 fs1 fc0 sc0 ls0 ws0">382</div></div><div class="pi" data-data='{"ctm":[1.839080,0.000000,0.000000,1.839080,0.000000,0.000000]}'></div></div>
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<div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62683f714c65f412597f20bf/bg2.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x6 h5 y18 ff1 fs2 fc0 sc0 ls0 ws0">图<span class="ff2">15-2 </span>数据源驱动程序选择界面</div><div class="t m0 x2 h4 ya ff1 fs1 fc0 sc0 ls0 ws0">(<span class="ff3">4</span>)在图<span class="ff3">15-2</span>中选择“<span class="ff3">Microsoft <span class="_ _1"></span>Access Driv<span class="_ _1"></span>er (*.mdb)<span class="_ _0"></span><span class="ff2">”<span class="ff1">单击“完成”加载</span></span>Access<span class="ff1">数据库的</span></span></div><div class="t m0 x3 h4 yb ff1 fs1 fc0 sc0 ls0 ws0">驱动,则出现如图<span class="ff3">15-3</span>所示数据库<span class="ff3">ODBC</span>安装界面:</div><div class="t m0 x4 h5 y19 ff1 fs2 fc0 sc0 ls0 ws0">图<span class="ff2">15-3 </span>数据库<span class="ff2">ODBC</span>安装界面</div><div class="t m0 x2 h4 y1a ff1 fs1 fc0 sc0 ls0 ws0">(<span class="ff3">5</span>)在图<span class="ff3">15-3</span>中单击“选择(<span class="ff3">S</span>)…”按钮,启动一个类似资源管理器的界面来选择数</div><div class="t m0 x3 h4 y1b ff1 fs1 fc0 sc0 ls0 ws0">据库,如图<span class="ff3">15-4</span>所示,在图<span class="ff3">15-4</span>所示的界面中选择<span class="ff3">bookstore.mdb</span>。</div><div class="t m0 x7 h5 y1c ff1 fs2 fc0 sc0 ls0 ws0">图<span class="ff3">15-4 </span>数据库选择界面</div></div><div class="t m0 x8 h6 y17 ff3 fs1 fc0 sc0 ls0 ws0">383</div></div><div class="pi" data-data='{"ctm":[1.839080,0.000000,0.000000,1.839080,0.000000,0.000000]}'></div></div>
<div id="pf3" class="pf w0 h0" data-page-no="3"><div class="pc pc3 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62683f714c65f412597f20bf/bg3.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x9 h7 y1d ff2 fs3 fc0 sc0 ls0 ws0">15.1 <span class="ff1">会员登录</span></div><div class="t m0 x2 h4 y1e ff1 fs1 fc0 sc0 ls0 ws0">做一个网上书店,在顾客开始购书之前,必须要记录用户的一些信息以便用户在不</div><div class="t m0 x3 h4 y1f ff1 fs1 fc0 sc0 ls0 ws0">同的分类、不同的页面购书时,最后能够去收款台统一结帐,而且网上书店同时有许多</div><div class="t m0 x3 h4 y20 ff1 fs1 fc0 sc0 ls0 ws0">人在选购图书,也要求对不同的顾客进行区分,我们可以要求顾客在购书之前进行注册</div><div class="t m0 x3 h4 y21 ff1 fs1 fc0 sc0 ls0 ws0">成为会员,以后只用会员代码和密码即可登录。</div><div class="t m0 x2 h4 y22 ff1 fs1 fc0 sc0 ls0 ws0">为了便于说明现在的电子商务网站,由<span class="ff3">JSP</span>做页面表现,由<span class="ff3">Java Bean</span>做应用逻辑的结</div><div class="t m0 x3 h4 y23 ff1 fs1 fc0 sc0 ls0 ws0">构,在本例中将会员登录程序分成两大部分:一、<span class="ff3">Java Bean</span>用于对数据库的操作,验证</div><div class="t m0 x3 h4 y24 ff1 fs1 fc0 sc0 ls0 ws0">用户名和密码是否正确;二、<span class="ff3">JSP</span>页面部分,用于供用户会员代码和密码以及显示验证结</div><div class="t m0 x3 h4 y25 ff1 fs1 fc0 sc0 ls0 ws0">果。</div><div class="t m0 x3 h4 ya ff2 fs1 fc0 sc0 ls0 ws0">15.1.1 <span class="ff1">会员登录</span>Java Bean</div><div class="t m0 x2 h4 y26 ff1 fs1 fc0 sc0 ls0 ws0">我们网上书店中的会员信息的库结构如图<span class="ff3">15-5</span>所示:</div><div class="t m0 x7 h5 y27 ff1 fs2 fc0 sc0 ls0 ws0">图<span class="ff3">15-5 </span>会员信息库</div><div class="t m0 x2 h4 y28 ff1 fs1 fc0 sc0 ls0 ws0">其中<span class="ff3">memberID </span>是主键,用于区分不同的会员,新会员注册时只能使用没有被使用的</div><div class="t m0 x3 h4 y29 ff1 fs1 fc0 sc0 ls0 ws0">用户代码。</div><div class="t m0 x2 h4 y2a ff1 fs1 fc0 sc0 ls0 ws0">在验证时我们只要使用验证用户的<span class="ff3">memberID</span>和其<span class="ff3">pwd</span>是否一致即可判断该用户是否</div><div class="t m0 x3 h4 y2b ff1 fs1 fc0 sc0 ls0 ws0">合法,如果合法则其登录次数加<span class="ff3">1</span>。</div><div class="t m0 x2 h4 y2c ff1 fs1 fc0 sc0 ls0 ws0">下面是用户验证部分的<span class="ff3">Java Bean</span>的代码</div><div class="t m0 x2 h4 y2d ff1 fs1 fc0 sc0 ls0 ws0">清单<span class="ff3">15-1 BuyerBean.Java</span></div><div class="t m0 x2 h6 y2e ff3 fs1 fc0 sc0 ls0 ws0">/* *BuyerBean.Java 1.10.2001 </div><div class="t m0 x2 h8 y2f ff2 fs1 fc0 sc0 ls0 ws0">*Copyright © 2000, 2001 by<span class="_ _0"></span> cuug llp.</div><div class="t m0 x2 h4 y30 ff3 fs1 fc0 sc0 ls0 ws0">*<span class="ff1">本</span>Bean<span class="ff1">中有两个</span>set<span class="ff1">方法和两个</span>get <span class="ff1">方法</span>:</div><div class="t m0 x2 h4 y31 ff3 fs1 fc0 sc0 ls0 ws0">*setMemberID()— <span class="ff1">对</span>BuyerBean<span class="ff1">中的</span>memberID<span class="ff1">属性进行赋值;</span></div><div class="t m0 x2 h4 y32 ff3 fs1 fc0 sc0 ls0 ws0">*setPwd()—<span class="ff1">对</span>BuyerBean<span class="ff1">中的</span> pwd <span class="ff1">属性进行赋值;</span></div><div class="t m0 x3 h4 y33 ff3 fs1 fc0 sc0 ls0 ws0"> *getLogontimes()— <span class="ff1">取该会员登录的次数</span></div><div class="t m0 xa h4 y15 ff3 fs1 fc0 sc0 ls0 ws0">*getMenberName<span class="ff1">()获得该会员的真实姓名,用于显示欢迎信息。</span></div><div class="t m0 xa h4 y34 ff3 fs1 fc0 sc0 ls0 ws0">*main()<span class="ff1">方法用于将</span>BEAN<span class="ff1">作为一个</span> Application<span class="ff1">进行测试时使用,正式发布时可以删</span></div></div><div class="t m0 x5 h6 y17 ff3 fs1 fc0 sc0 ls0 ws0">384</div></div><div class="pi" data-data='{"ctm":[1.839080,0.000000,0.000000,1.839080,0.000000,0.000000]}'></div></div>
<div id="pf4" class="pf w0 h0" data-page-no="4"><div class="pc pc4 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62683f714c65f412597f20bf/bg4.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 x3 h4 y35 ff1 fs1 fc0 sc0 ls0 ws0">除。</div><div class="t m0 x3 h6 y36 ff3 fs1 fc0 sc0 ls0 ws0"> **/</div><div class="t m0 x3 h6 y37 ff3 fs1 fc0 sc0 ls0 ws0">package cuug;</div><div class="t m0 x3 h6 y3 ff3 fs1 fc0 sc0 ls0 ws0">import Java.sql.*;</div><div class="t m0 x3 h6 y38 ff3 fs1 fc0 sc0 ls0 ws0">public class BuyerBean {</div><div class="t m0 x2 h4 y6 ff3 fs1 fc0 sc0 ls0 ws0">private String memberID = null ; //<span class="ff1">会员</span>ID</div><div class="t m0 x2 h4 y7 ff3 fs1 fc0 sc0 ls0 ws0">private String memberName = null; //<span class="ff1">会员姓名</span></div><div class="t m0 x2 h4 y8 ff3 fs1 fc0 sc0 ls0 ws0">private String pwd = null;<span class="_ _6"> </span>//<span class="ff1">密码</span></div><div class="t m0 x2 h4 y9 ff3 fs1 fc0 sc0 ls0 ws0">private int logontimes = -1;<span class="_ _7"> </span>//<span class="ff1">登录的次数</span></div><div class="t m0 x2 h6 y39 ff3 fs1 fc0 sc0 ls0 ws0">p<span class="_ _8"> </span>r<span class="_ _8"> </span>i<span class="_ _8"> </span>v<span class="_ _8"> </span>a<span class="_ _8"> </span>t<span class="_ _8"> </span>e<span class="_ _8"> </span> <span class="_ _8"> </span>s<span class="_ _8"> </span>t<span class="_ _8"> </span>a<span class="_ _8"> </span>t<span class="_ _8"> </span>i<span class="_ _8"> </span>c<span class="_ _8"> </span> <span class="_ _8"> </span>S<span class="_ _8"> </span>t<span class="_ _8"> </span>r<span class="_ _8"> </span>i<span class="_ _8"> </span>n<span class="_ _8"> </span>g<span class="_ _8"> </span><span class="fc1 sc0"> </span><span class="_ _8"> </span><span class="fc1 sc0">s</span><span class="_ _8"> </span><span class="fc1 sc0">t</span><span class="_ _8"> </span><span class="fc1 sc0">r</span><span class="_ _8"> </span><span class="fc1 sc0">D</span><span class="_ _8"> </span><span class="fc1 sc0">B</span><span class="_ _8"> </span><span class="fc1 sc0">D</span><span class="_ _8"> </span><span class="fc1 sc0">r</span><span class="_ _8"> </span><span class="fc1 sc0">i</span><span class="_ _8"> </span><span class="fc1 sc0">v</span><span class="_ _8"> </span><span class="fc1 sc0">e</span><span class="_ _8"> </span><span class="fc1 sc0">r</span><span class="_ _8"> </span><span class="fc1 sc0"> </span><span class="_ _8"> </span><span class="fc1 sc0">=</span><span class="_ _8"> </span><span class="fc1 sc0"> </span><span class="_ _8"> </span><span class="fc1 sc0">“</span><span class="_ _8"> </span><span class="fc1 sc0">s</span><span class="_ _8"> </span><span class="fc1 sc0">u</span><span class="_ _8"> </span><span class="fc1 sc0">n</span><span class="_ _8"> </span><span class="fc1 sc0">.</span><span class="_ _8"> </span><span class="fc1 sc0">j</span><span class="_ _9"> </span><span class="fc1 sc0">d</span><span class="_ _8"> </span><span class="fc1 sc0">b</span><span class="_ _8"> </span><span class="fc1 sc0">c</span><span class="_ _8"> </span><span class="fc1 sc0">.</span><span class="_ _8"> </span><span class="fc1 sc0">o</span><span class="_ _8"> </span><span class="fc1 sc0">d</span><span class="_ _8"> </span><span class="fc1 sc0">b</span><span class="_ _8"> </span><span class="fc1 sc0">c</span><span class="_ _8"> </span><span class="fc1 sc0">.</span><span class="_ _8"> </span><span class="fc1 sc0">J</span><span class="_ _8"> </span><span class="fc1 sc0">d</span><span class="_ _8"> </span><span class="fc1 sc0">b</span><span class="_ _8"> </span><span class="fc1 sc0">c</span><span class="_ _8"> </span><span class="fc1 sc0">O</span><span class="_ _8"> </span><span class="fc1 sc0">d</span><span class="_ _8"> </span><span class="fc1 sc0">b</span><span class="_ _8"> </span><span class="fc1 sc0">c</span><span class="_ _8"> </span><span class="fc1 sc0">D</span><span class="_ _8"> </span><span class="fc1 sc0">r</span><span class="_ _8"> </span><span class="fc1 sc0">i</span><span class="_ _8"> </span><span class="fc1 sc0">v</span><span class="_ _8"> </span><span class="fc1 sc0">e</span><span class="_ _8"> </span><span class="fc1 sc0">r</span><span class="_ _8"> </span><span class="fc1 sc0">”</span><span class="_ _8"> </span><span class="fc1 sc0">;</span></div><div class="t m0 x3 h4 yb ff3 fs1 fc0 sc0 ls0 ws0">//JDBC<span class="ff1">驱动</span></div><div class="t m0 x2 h4 yc ff3 fs1 fc0 sc0 ls0 ws0">private static String strDBUrl = “jdbc:odbc:bookstore”; //<span class="ff1">数据源</span> <span class="ff1">,</span></div><div class="t m0 x2 h4 yd ff3 fs1 fc0 sc0 ls0 ws0">private Connection conn =null; //<span class="ff1">连接</span></div><div class="t m0 x2 h4 ye ff3 fs1 fc0 sc0 ls0 ws0">private ResultSet rs = null;<span class="_ _a"> </span>//<span class="ff1">结果集</span></div><div class="t m0 x2 h6 y3a ff3 fs1 fc0 sc0 ls0 ws0">public BuyerBean (){</div><div class="t m0 xb h4 y11 ff3 fs1 fc0 sc0 ls0 ws0">//<span class="ff1">加载</span>JDBC-ODBC<span class="ff1">驱动</span></div><div class="t m0 xb h6 y3b ff3 fs1 fc0 sc0 ls0 ws0">try {</div><div class="t m0 xc h6 y13 ff3 fs1 fc0 sc0 ls0 ws0">Class.forName(strDBDriver );</div><div class="t m0 xb h6 y3c ff3 fs1 fc0 sc0 ls0 ws0">}</div><div class="t m0 xb h4 y3d ff3 fs1 fc0 sc0 ls0 ws0">//<span class="ff1">捕获异常</span></div><div class="t m0 xb h6 y3e ff3 fs1 fc0 sc0 ls0 ws0">catch(Java.lang.ClassNotFoundException e){</div><div class="t m0 xc h6 y3f ff3 fs1 fc0 sc0 ls0 ws0">System.err<span class="_ _1"></span>.prin<span class="_ _1"></span>tln(“BuyerBean():” + e.getMe<span class="_ _0"></span>ssage());</div><div class="t m0 xb h6 y40 ff3 fs1 fc0 sc0 ls0 ws0">}</div><div class="t m0 x2 h6 y1b ff3 fs1 fc0 sc0 ls0 ws0">}</div><div class="t m0 x2 h4 y41 ff3 fs1 fc0 sc0 ls0 ws0">//<span class="ff1">获得登录次数,登录的会员的名字也在该方法调用时获得</span></div><div class="t m0 x2 h6 y42 ff3 fs1 fc0 sc0 ls0 ws0">public int getLogontimes(){</div><div class="t m0 xb h6 y43 ff3 fs1 fc0 sc0 ls0 ws0">String strSql = null;</div><div class="t m0 xb h6 y44 ff3 fs1 fc0 sc0 ls0 ws0">try{</div><div class="t m0 xc h6 y45 ff3 fs1 fc0 sc0 ls0 ws0">conn = DriverManager<span class="_ _1"></span>.get<span class="_ _1"></span>Connection(strDBUrl);</div><div class="t m0 xc h6 y46 ff3 fs1 fc0 sc0 ls0 ws0">Statement stmt = conn.createStatement();</div><div class="t m0 xc h6 y47 ff3 fs1 fc0 sc0 ls0 ws0">str<span class="_ _0"></span>Sql<span class="_ _0"></span> = <span class="_ _0"></span>“S<span class="_ _0"></span>ele<span class="_ _0"></span>ct<span class="_ _0"></span> lo<span class="_ _0"></span>gon<span class="_ _0"></span>Times,m<span class="_ _0"></span>em<span class="_ _0"></span>ber<span class="_ _0"></span>nam<span class="_ _0"></span>e <span class="_ _0"></span>fr<span class="_ _0"></span>om b<span class="_ _0"></span>uy<span class="_ _0"></span>erI<span class="_ _0"></span>nf<span class="_ _0"></span>o wh<span class="_ _0"></span>er<span class="_ _0"></span>e m<span class="_ _0"></span>em<span class="_ _0"></span>ber<span class="_ _0"></span>ID <span class="_ _0"></span>= <span class="_ _0"></span>‘”</div><div class="t m0 xb h6 y48 ff3 fs1 fc0 sc0 ls0 ws0">+ </div><div class="t m0 xd h6 y49 ff3 fs1 fc0 sc0 ls0 ws0">memberID + “’<span class="_ _b"></span> and pwd =’” + pwd + “’”;</div><div class="t m0 xc h6 y4a ff3 fs1 fc0 sc0 ls0 ws0">rs = stmt.executeQuery(strSql);</div></div><div class="t m0 x8 h6 y17 ff3 fs1 fc0 sc0 ls0 ws0">385</div></div><div class="pi" data-data='{"ctm":[1.839080,0.000000,0.000000,1.839080,0.000000,0.000000]}'></div></div>
<div id="pf5" class="pf w0 h0" data-page-no="5"><div class="pc pc5 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62683f714c65f412597f20bf/bg5.jpg"><div class="c x0 y1 w2 h2"><div class="t m0 xc h6 y35 ff3 fs1 fc0 sc0 ls0 ws0">while (rs.next()){</div><div class="t m0 xe h4 y4b ff3 fs1 fc0 sc0 ls0 ws0">// <span class="ff1">登录的次数</span></div><div class="t m0 xe h6 y37 ff3 fs1 fc0 sc0 ls0 ws0">logontimes = rs.getInt(“logonT<span class="_ _1"></span>imes”);</div><div class="t m0 xe h4 y4c ff3 fs1 fc0 sc0 ls0 ws0">//<span class="ff1">会员姓名</span></div><div class="t m0 xe h6 y3 ff3 fs1 fc0 sc0 ls0 ws0"> memberName = rs.getString(“membername”); </div><div class="t m0 xc h6 y38 ff3 fs1 fc0 sc0 ls0 ws0">}</div><div class="t m0 xc h6 y5 ff3 fs1 fc0 sc0 ls0 ws0">rs.close();</div><div class="t m0 xc h4 y6 ff3 fs1 fc0 sc0 ls0 ws0">//<span class="ff1">如果是合法会员则将其登录次数加</span>1</div><div class="t m0 xc h6 y7 ff3 fs1 fc0 sc0 ls0 ws0">if (logontimes != -1 ) {</div><div class="t m0 xe h6 y4d ff3 fs1 fc0 sc0 ls0 ws0">strSql = “Update buyerInfo set </div><div class="t m0 xd h6 y9 ff3 fs1 fc0 sc0 ls0 ws0">logonT<span class="_ _1"></span>imes = logonT<span class="_ _1"></span>imes +1 where memberID = ‘” + memberID + “’”;</div><div class="t m0 xe h6 y39 ff3 fs1 fc0 sc0 ls0 ws0">stmt.executeUpdate(strSql);</div><div class="t m0 xc h6 yb ff3 fs1 fc0 sc0 ls0 ws0">}</div><div class="t m0 xc h6 y4e ff3 fs1 fc0 sc0 ls0 ws0">stmt.close();</div><div class="t m0 xc h6 yd ff3 fs1 fc0 sc0 ls0 ws0">conn.close();</div><div class="t m0 xb h6 yf ff3 fs1 fc0 sc0 ls0 ws0">}</div><div class="t m0 xb h4 y10 ff3 fs1 fc0 sc0 ls0 ws0">//<span class="ff1">捕获异常</span></div><div class="t m0 xb h6 y11 ff3 fs1 fc0 sc0 ls0 ws0">catch(SQLException e){</div><div class="t m0 xc h6 y3b ff3 fs1 fc0 sc0 ls0 ws0">System.err<span class="_ _b"></span>.println(“BuyerBean.getLogontimes():” + e.getMessage());</div><div class="t m0 xb h6 y13 ff3 fs1 fc0 sc0 ls0 ws0">}</div><div class="t m0 xb h6 y3c ff3 fs1 fc0 sc0 ls0 ws0">return logontimes ;</div><div class="t m0 x2 h6 y3d ff3 fs1 fc0 sc0 ls0 ws0">}</div><div class="t m0 xa h4 y4f ff3 fs1 fc0 sc0 ls0 ws0">//<span class="ff1">设置</span>memberID<span class="ff1">属性;</span></div><div class="t m0 x2 h6 y3f ff3 fs1 fc0 sc0 ls0 ws0">public void setMemberID(String ID){</div><div class="t m0 xb h6 y40 ff3 fs1 fc0 sc0 ls0 ws0">this.memberID = ID;</div><div class="t m0 x2 h6 y1b ff3 fs1 fc0 sc0 ls0 ws0">}</div><div class="t m0 xa h4 y50 ff3 fs1 fc0 sc0 ls0 ws0">//<span class="ff1">设置</span>pwd <span class="ff1">属性</span></div><div class="t m0 x2 h6 y41 ff3 fs1 fc0 sc0 ls0 ws0">public void setPwd(String password){</div><div class="t m0 xb h6 y42 ff3 fs1 fc0 sc0 ls0 ws0">this.pwd = password;</div><div class="t m0 x2 h6 y43 ff3 fs1 fc0 sc0 ls0 ws0">}</div><div class="t m0 xa h4 y51 ff3 fs1 fc0 sc0 ls0 ws0">//<span class="ff1">获得该会员的真实姓名,必须在取该会员登录的次数之后才能被赋予正确的值</span></div><div class="t m0 x2 h6 y45 ff3 fs1 fc0 sc0 ls0 ws0">public String getMemberName(){</div><div class="t m0 xb h6 y46 ff3 fs1 fc0 sc0 ls0 ws0">return memberName;</div><div class="t m0 x2 h6 y47 ff3 fs1 fc0 sc0 ls0 ws0">}</div><div class="t m0 x2 h4 y52 ff3 fs1 fc0 sc0 ls0 ws0">//<span class="ff1">测试</span>Bean<span class="ff1">中的各个方法是否能够正常工作</span></div><div class="t m0 x2 h8 y53 ff2 fs1 fc0 sc0 ls0 ws0">public static void main(String args[]){</div><div class="t m0 xb h8 y54 ff2 fs1 fc0 sc0 ls0 ws0">BuyerBean buyer = new BuyerBean();</div></div><div class="t m0 x5 h6 y17 ff3 fs1 fc0 sc0 ls0 ws0">386</div></div><div class="pi" data-data='{"ctm":[1.839080,0.000000,0.000000,1.839080,0.000000,0.000000]}'></div></div>