JavaWeb程序设计任务教程第2版课后题答案 394.99KB

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<link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/base.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/88745730/raw.css" rel="stylesheet"/><div id="sidebar" style="display: none"><div id="outline"></div></div><div class="pf w0 h0" data-page-no="1" id="pf1"><div class="pc pc1 w0 h0"><img alt="" class="bi x0 y0 w1 h1" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/88745730/bg1.jpg"/><div class="c x0 y1 w2 h0"><div class="t m0 x1 h2 y2 ff1 fs0 fc0 sc0 ls0 ws0">第<span class="_ _0"> </span><span class="ff2">1<span class="_"> </span></span>章<span class="ff3"> </span></div><div class="t m0 x1 h2 y3 ff2 fs0 fc0 sc0 ls0 ws0">1.HTML <span class="_ _0"> </span><span class="ff1">中文译为</span>_____<span class="ff1 fc1">超<span class="_ _1"></span>文本标记语言<span class="ff2 fc0">___<span class="_ _1"></span>___<span class="ff1">，主要作用是<span class="_ _1"></span>通过<span class="ff2"> <span class="_ _0"> </span>HTML <span class="_ _2"> </span></span>标签对网页中<span class="_ _1"></span>的文</span></span></span></div><div class="t m0 x1 h2 y4 ff1 fs0 fc0 sc0 ls0 ws0">本、图片、声音<span class="_ _1"></span>等内容进<span class="_ _1"></span>行描述。<span class="ff3"> </span></div><div class="t m0 x1 h2 y5 ff2 fs0 fc0 sc0 ls1 ws0">2.<span class="ff1 ls0">表单主<span class="_ _1"></span>要由<span class="_ _0"> </span><span class="ff2 ls1">3 <span class="_"> </span></span>部分组成，分别是表<span class="_ _1"></span>单控件、<span class="_ _1"></span>提示信息和<span class="ff2 ls2">__<span class="_ _1"></span><span class="ff1 fc1 ls0">表单域<span class="ff2 fc0">___<span class="_ _1"></span><span class="ff1">。<span class="ff3"> </span></span></span></span></span></span></div><div class="t m0 x1 h2 y6 ff2 fs0 fc0 sc0 ls0 ws0">3.CS<span class="_ _1"></span>S <span class="_ _0"> </span><span class="ff1">中<span class="_ _3"></span>文译为</span>____<span class="ff1 fc1">层叠样<span class="_ _3"></span>式表</span>___<span class="ff1">，用<span class="_ _3"></span>于控制网页样式并<span class="_ _3"></span>允许将样式信息与网<span class="_ _3"></span>页内容分离</span></div><div class="t m0 x1 h2 y7 ff1 fs0 fc0 sc0 ls0 ws0">的一种标签性语<span class="_ _1"></span>言。<span class="ff3"> </span></div><div class="t m0 x1 h2 y8 ff2 fs0 fc0 sc0 ls1 ws0">4.<span class="ls0">_____<span class="ff4 fc1"> <span class="_ _4"></span>JavaScri<span class="_ _1"></span>pt<span class="ff2 fc0">___<span class="ff1">是<span class="_ _0"> </span></span>W<span class="_ _5"></span>eb<span class="_"> </span><span class="ff1">中一种功能强大的脚<span class="_ _1"></span>本语言，<span class="_ _6"></span>常用来为网页<span class="_ _1"></span>添加各式各<span class="_ _1"></span>样的动</span></span></span></span></div><div class="t m0 x1 h2 y9 ff1 fs0 fc0 sc0 ls0 ws0">态功能，<span class="_ _7"></span>它不需要进<span class="_ _1"></span>行编译，<span class="_ _7"></span>直接嵌<span class="_ _1"></span>入在<span class="_ _0"> </span><span class="ff2">HTML<span class="_"> </span></span>页面中，<span class="_ _7"></span>就可以把<span class="_ _1"></span>静态的页<span class="_ _1"></span>面转变成支持用</div><div class="t m0 x1 h2 ya ff1 fs0 fc0 sc0 ls0 ws0">户交互并响应事<span class="_ _1"></span>件的动态<span class="_ _1"></span>页面。<span class="ff3"> </span></div><div class="t m0 x1 h2 yb ff2 fs0 fc0 sc0 ls0 ws0">5.<img <span class="_ _5"></span>/><span class="ff1">标<span class="_ _1"></span>签表示一个图<span class="_ _1"></span>像信息，<span class="_ _8"></span>它有一个必须要<span class="_ _1"></span>指定<span class="ff2 ls2">__</span><span class="ff4 fc1">s<span class="_ _1"></span>rc<span class="ff5"> <span class="ff2 fc0">___<span class="ff1">的<span class="_ _1"></span>属性，<span class="_ _8"></span>用来指定图片路径<span class="_ _1"></span>。<span class="_ _9"></span><span class="ff3"> </span></span></span></span></span></span></div><div class="t m0 x1 h2 yc ff2 fs0 fc0 sc0 ls1 ws0">6.<span class="ls0">______ <span class="_"> </span><span class="ff1">外链式</span>(<span class="ff1">或称外部式</span>)_<span class="_ _1"></span>_____<span class="ff1">是指将<span class="_ _a"> </span></span>Jav<span class="_ _1"></span>aScri<span class="_ _1"></span>pt<span class="_ _a"> </span><span class="ff1">代码写在一个单独<span class="_ _1"></span>的文件中，一<span class="_ _1"></span>般使</span></span></div><div class="t m0 x1 h2 yd ff1 fs0 fc0 sc0 ls0 ws0">用“<span class="ff2 ls3">js</span>”作为<span class="_ _1"></span>文件的扩展名<span class="_ _1"></span><span class="ff2">,<span class="ff1">在<span class="_ _0"> </span></span>HTML<span class="_"> </span><span class="ff1">文件中使用<span class="_ _1"></span><span class="ff2"><scrip<span class="_ _1"></span>t><span class="ff1">标签进行引入<span class="_ _0"> </span></span>J<span class="_ _5"></span>avaScript<span class="_"> </span><span class="ff1">文件。<span class="ff3"> </span></span></span></span></span></div><div class="t m0 x1 h2 ye ff1 fs0 fc0 sc0 ls0 ws0">第二章<span class="ff3"> </span></div><div class="t m0 x1 h2 yf ff2 fs0 fc0 sc0 ls0 ws0">1.XML<span class="_ _b"> </span><span class="ff1 ls4">称为</span>_________<span class="ff1 fc1">可扩<span class="_ _1"></span>展标记语言<span class="ff2 fc0">___<span class="_ _1"></span>_____<span class="ff1">，用于提供<span class="_ _1"></span>数据描述格<span class="_ _1"></span>式，适用于不同应用</span></span></span></div><div class="t m0 x1 h2 y10 ff1 fs0 fc0 sc0 ls0 ws0">程序之间的数据<span class="_ _1"></span>交换，<span class="_ _9"></span>而且这种交换不以预<span class="_ _1"></span>先定义的一组数<span class="_ _1"></span>据结构为<span class="_ _1"></span>前提，<span class="_ _9"></span>增强了可扩展性。<span class="_ _9"></span><span class="ff3"> </span></div><div class="t m0 x1 h2 y11 ff2 fs0 fc0 sc0 ls0 ws0">2.XML <span class="_ _0"> </span><span class="ff1">文档中有且仅有<span class="_ _1"></span>一个顶层元素<span class="_ _1"></span>，称为文<span class="_ _1"></span>档元素或<span class="ff2 ls5">__</span><span class="fc1">根元素</span><span class="ff2">__<span class="_ _1"></span>_<span class="ff1">。<span class="ff3"> </span></span></span></span></div><div class="t m0 x1 h2 y12 ff2 fs0 fc0 sc0 ls1 ws0">3.<span class="ff1 ls0">在<span class="ff2"> <span class="_ _0"> </span>XML<span class="_ _a"> </span></span>声明中，可以通<span class="_ _1"></span>过<span class="_ _a"> </span><span class="ff2">standa<span class="_ _1"></span>lone<span class="_ _a"> </span><span class="ff1">属性来声明这个文<span class="_ _1"></span>档是否为<span class="_ _1"></span>独立的文档。默<span class="_ _1"></span>认情况</span></span></span></div><div class="t m0 x1 h2 y13 ff1 fs0 fc0 sc0 ls0 ws0">下，<span class="ff2">st<span class="_ _1"></span>andalone<span class="_"> </span><span class="ff1">属性的值<span class="_ _1"></span>为<span class="ff2 ls2">__</span><span class="ff5 fc1"> <span class="ff4 ls6">no</span></span><span class="ff2">___</span>。<span class="ff3"> </span></span></span></div><div class="t m0 x1 h2 y14 ff2 fs0 fc0 sc0 ls1 ws0">4.<span class="ff1 ls0">在<span class="_ _0"> </span><span class="ff2">D<span class="_ _1"></span>TD <span class="_ _0"> </span><span class="ff1">中定义元素的属<span class="_ _1"></span>性时，<span class="_ _c"></span><span class="ff2">______<span class="ff4 fc1">C<span class="_ _1"></span>DA<span class="_ _4"></span>T<span class="_ _4"></span>A<span class="ff2 fc0">__________<span class="ff1">是<span class="_ _1"></span>最常用的<span class="_ _1"></span>一种属性类型<span class="_ _1"></span>，<span class="_ _c"></span>表明属</span></span></span></span></span></span></span></div><div class="t m0 x1 h2 y15 ff1 fs0 fc0 sc0 ls0 ws0">性类型是字符数<span class="_ _1"></span>据，与<span class="ff2">#PC<span class="_ _1"></span>DA<span class="_ _4"></span>T<span class="_ _4"></span>A<span class="_"> </span><span class="ff1">相同。<span class="ff3"> </span></span></span></div><div class="t m0 x1 h2 y16 ff2 fs0 fc0 sc0 ls0 ws0">5.<span class="_ _4"></span>T<span class="_ _4"></span>omcat <span class="_ _0"> </span><span class="ff1">的端口号可<span class="_ _1"></span>在其安装目录下<span class="_ _1"></span>的<span class="ff2">_____<span class="_ _1"></span><span class="ff4 fc1">conf<span class="ff2 fc0">___<span class="ff1">文件夹下<span class="_ _1"></span>的<span class="_ _0"> </span><span class="ff2">serv<span class="_ _1"></span>er<span class="_ _4"></span>.xml<span class="_"> </span><span class="ff1">文件中配<span class="_ _1"></span>置。<span class="ff3"> </span></span></span></span></span></span></span></span></div><div class="t m0 x1 h2 y17 ff1 fs0 fc0 sc0 ls0 ws0">第三章<span class="ff3"> </span></div><div class="t m0 x1 h2 y18 ff2 fs0 fc0 sc0 ls0 ws0">1.HTTP<span class="_ _0"> </span><span class="ff1">即</span>______<span class="ff1 fc1">超文<span class="_ _1"></span>本传输协议<span class="_ _1"></span><span class="ff2 fc0">_________<span class="_ _1"></span>_<span class="ff1">协议，它是一<span class="_ _1"></span>种请求<span class="ff2">/</span>响应<span class="_ _1"></span>式的协<span class="_ _1"></span>议。<span class="ff3"> </span></span></span></span></div><div class="t m0 x1 h2 y19 ff2 fs0 fc0 sc0 ls1 ws0">2.<span class="ff1 ls0">在<span class="ff2"> <span class="_ _0"> </span>HT<span class="_ _3"></span>TP<span class="_ _b"> </span></span>协议中，一个完整的请求消息是由请求<span class="_ _1"></span>行、<span class="ff2 ls2">__</span><span class="fc1">请求头</span><span class="ff2 ls2">__</span>和实体内容三部分组成。<span class="_ _9"></span><span class="ff3"> </span></span></div><div class="t m0 x1 h2 y1a ff2 fs0 fc0 sc0 ls0 ws0">3.HTTP <span class="_ _2"> </span><span class="ff1">请求消息的<span class="_ _1"></span>请求行<span class="_ _1"></span>的构成，<span class="_ _9"></span>包括<span class="fc1">请求方式<span class="ff4"> <span class="_ _d"> </span></span></span>、<span class="_ _e"></span>资源路径以及<span class="_ _1"></span>所使用<span class="_ _1"></span>的<span class="_ _0"> </span><span class="ff2 ls2">HTTP<span class="_"> </span></span>协议版本。<span class="ff3"> </span></span></div><div class="t m0 x1 h2 y1b ff2 fs0 fc0 sc0 ls0 ws0">4.HTTP <span class="_ _2"> </span><span class="ff1">专门用于定<span class="_ _1"></span>义浏览<span class="_ _1"></span>器与<span class="ff2 ls5">__</span><span class="fc1">服务器</span><span class="ff2">_____<span class="_ _1"></span>_<span class="ff1">之间交换数<span class="_ _1"></span>据的过程以及<span class="_ _1"></span>数据本身的<span class="_ _1"></span>格式。<span class="ff3"> </span></span></span></span></div><div class="t m0 x1 h2 y1c ff2 fs0 fc0 sc0 ls0 ws0">5.Accept<span class="_ _5"></span>-Encoding<span class="_"> </span><span class="ff1">头字段可以使<span class="_ _1"></span>用<span class="_ _0"> </span><span class="ff2">gzip<span class="_"> </span></span>和<span class="ff2">_____<span class="ff4 fc1">deflate</span>_<span class="_ _1"></span>__<span class="ff1">这两种最<span class="_ _1"></span>常见的数据编码<span class="_ _1"></span>格式。<span class="_ _1"></span><span class="ff3"> </span></span></span></span></div><div class="t m0 x1 h2 y1d ff1 fs0 fc0 sc0 ls0 ws0">第四章<span class="ff3"> </span></div><div class="t m0 x1 h2 y1e ff2 fs0 fc0 sc0 ls1 ws0">1.<span class="ff1 ls0">如果当<span class="_ _1"></span>前<span class="_ _0"> </span><span class="ff2">W<span class="_ _5"></span>eb<span class="_ _0"> </span><span class="ff1">资源不想<span class="_ _1"></span>处理请求，<span class="_ _6"></span><span class="ff2"> <span class="_ _2"> </span>R<span class="_ _1"></span>equestDi<span class="_ _1"></span>spat<span class="_ _5"></span>cher<span class="_ _0"> </span><span class="ff1">接口提供了一个</span> <span class="_ _0"> </span>forw<span class="_ _1"></span>ar<span class="_ _1"></span>d()<span class="ff1">方法，<span class="_ _6"></span>该</span></span></span></span></span></div><div class="t m0 x1 h2 y1f ff1 fs0 fc0 sc0 ls0 ws0">方法可以将当前<span class="_ _1"></span>请求传递<span class="_ _1"></span>给其他<span class="_ _d"> </span><span class="ff2">W<span class="_ _5"></span>eb<span class="_"> </span><span class="ff1">资源对这些<span class="_ _1"></span>信息进行<span class="_ _1"></span>处理并响应给<span class="_ _1"></span>客户端<span class="ff2">,</span>这<span class="_ _1"></span>种方式称</span></span></div><div class="t m0 x1 h2 y20 ff1 fs0 fc0 sc0 ls0 ws0">为<span class="ff2">___</span><span class="fc1">请求转<span class="_ _1"></span>发<span class="ff2 fc0">_________<span class="_ _1"></span>__<span class="ff1">。<span class="ff3"> </span></span></span></span></div><div class="t m0 x1 h2 y21 ff2 fs0 fc0 sc0 ls0 ws0">2.Servlet API<span class="_"> </span><span class="ff1">中，专门用<span class="_ _1"></span>来封装<span class="_ _0"> </span><span class="ff2">HTTP<span class="_"> </span></span>响应消息的接口<span class="_ _1"></span>是<span class="ff2">____<span class="ff5 fc1"> <span class="ff4">Http<span class="_ _1"></span>ServletR<span class="_ _5"></span>esponse<span class="ff2 fc0">_<span class="ff1">。<span class="ff3"> </span></span></span></span></span></span></span></div><div class="t m0 x1 h2 y22 ff2 fs0 fc0 sc0 ls0 ws0">3. <span class="_ _5"></span>__<span class="ff1 fc1">请求重<span class="_ _1"></span>定向<span class="ff2 fc0">_<span class="ff1">指的是<span class="_ _0"> </span></span>W<span class="_ _5"></span>eb<span class="_"> </span><span class="ff1">服务器接收到客<span class="_ _1"></span>户端的请求后<span class="_ _1"></span>，<span class="_ _7"></span>可能由<span class="_ _1"></span>于某些条件限制<span class="_ _1"></span>，<span class="_ _7"></span>不能</span></span></span></div><div class="t m0 x1 h2 y23 ff1 fs0 fc0 sc0 ls0 ws0">访问当前请求<span class="_ _0"> </span><span class="ff2">URL<span class="_"> </span></span>所指向的<span class="_ _0"> </span><span class="ff2">W<span class="_ _1"></span>eb<span class="_ _0"> </span><span class="ff1">资源，而是指定了<span class="_ _1"></span>一个新的资<span class="_ _1"></span>源路径，让客<span class="_ _1"></span>户端重新发<span class="_ _1"></span>送</span></span></div><div class="t m0 x1 h2 y24 ff1 fs0 fc0 sc0 ls0 ws0">请求。<span class="ff3"> </span></div><div class="t m0 x1 h2 y25 ff2 fs0 fc0 sc0 ls1 ws0">4.<span class="_ _f"></span><span class="ff1 ls0">在<span class="_ _f"></span><span class="ff2"> <span class="_ _a"> </span>Servlet<span class="_ _10"> </span></span>开<span class="_ _f"></span>发<span class="_ _f"></span>中<span class="_ _f"></span>，<span class="_ _f"></span>当<span class="_ _f"></span>我<span class="_ _f"></span>们<span class="_ _f"></span>要<span class="_ _f"></span>自<span class="_ _11"></span>定<span class="_ _f"></span>义<span class="_ _f"></span>一<span class="_ _f"></span>个<span class="_ _11"></span><span class="ff2"> <span class="_ _a"> </span>Servlet <span class="_ _a"> </span></span><span class="ls7">时，可以继承</span></span><span class="ls5">__<span class="ff4 fc1 ls0">GenericServle<span class="_ _1"></span>t<span class="ff2 fc0 ls2">__<span class="_ _f"></span><span class="ff1 ls0">或</span></span></span></span></div><div class="t m0 x1 h2 y26 ff2 fs0 fc0 sc0 ls0 ws0">HttpS<span class="_ _1"></span>ervlet<span class="_"> </span><span class="ff1">类。<span class="ff3"> </span></span></div><div class="t m0 x1 h2 y27 ff2 fs0 fc0 sc0 ls0 ws0">5.Servlet <span class="_ _12"> </span><span class="ff1">的<span class="_ _d"> </span>配<span class="_ _13"> </span>置<span class="_ _13"> </span>主<span class="_ _d"> </span>要<span class="_ _13"> </span>有<span class="_ _d"> </span>两<span class="_ _13"> </span>种<span class="_ _d"> </span>方<span class="_ _13"> </span>式<span class="_ _d"> </span>，<span class="_ _13"> </span>分<span class="_ _d"> </span>别<span class="_ _13"> </span>是<span class="_ _d"> </span>使<span class="_ _13"> </span>用<span class="_ _14"> </span></span>web.xm<span class="_ _1"></span>l<span class="_ _15"> </span><span class="ff1">文<span class="_ _13"> </span>件<span class="_ _d"> </span>来<span class="_ _13"> </span>完<span class="_ _d"> </span>成<span class="_ _13"> </span>配<span class="_ _d"> </span>置<span class="_ _13"> </span>和<span class="_ _d"> </span>使<span class="_ _13"> </span>用</span></div><div class="t m0 x1 h2 y28 ff2 fs0 fc0 sc0 ls0 ws0">_<span class="ff4 fc1">@W<span class="_ _5"></span>ebServlet<span class="ff2 fc0 ls2">__<span class="ff1 ls0">注<span class="_ _1"></span>解的方式完成<span class="_ _1"></span>配置。<span class="_ _1"></span><span class="ff3"> </span></span></span></span></div><div class="t m0 x1 h2 y29 ff2 fs0 fc0 sc0 ls0 ws0">6.Servlet <span class="_ _0"> </span><span class="ff1">的生命周期大致<span class="_ _1"></span>可以分为三<span class="_ _1"></span>个阶段<span class="ff2">,</span>分别<span class="_ _1"></span>是初始化<span class="_ _1"></span>阶段、<span class="_ _16"></span>运行阶段和<span class="ff2 ls5">__</span><span class="fc1">销毁阶段<span class="_ _1"></span><span class="ff2 fc0">___<span class="ff1">。<span class="_ _9"></span><span class="ff3"> </span></span></span></span></span></div><div class="t m0 x1 h2 y2a ff1 fs0 fc0 sc0 ls0 ws0">第五章<span class="ff3"> </span></div><div class="t m0 x1 h2 y2b ff2 fs0 fc0 sc0 ls1 ws0">1.<span class="ff1 ls0">服务器<span class="_ _1"></span>向客户端发送<span class="_ _13"> </span><span class="ff2">Co<span class="_ _1"></span>okie<span class="_ _13"> </span><span class="ff1">时，<span class="_ _9"></span>会在<span class="ff2"> <span class="_ _0"> </span><span class="ls2">HTTP<span class="_ _d"> </span></span></span>响<span class="_ _1"></span>应头字<span class="_ _1"></span>段中增加<span class="ff2 ls5">__</span><span class="ff5 fc1"> <span class="ff4">Set-Coo<span class="_ _1"></span>kie<span class="ff5"> <span class="ff1 fc0">响应头字段。<span class="_ _5"></span><span class="ff3"> </span></span></span></span></span></span></span></span></div><div class="t m0 x1 h2 y2c ff2 fs0 fc0 sc0 ls0 ws0">2.<span class="_ _4"></span>W<span class="_ _1"></span>eb <span class="_ _2"> </span><span class="ff1">应用中的<span class="_ _3"></span>会话指的是<span class="_ _3"></span>一个客户端<span class="_ _3"></span></span>(<span class="_ _3"></span><span class="ff1">浏览器</span>)<span class="_ _3"></span><span class="ff1">与</span><span class="ls5">__<span class="_ _3"></span></span>WEB<span class="_ _b"> </span><span class="ff1 ls8">服务器</span><span class="ls2">__</span><span class="ff1">之间连续发生<span class="_ _3"></span>的一系列</span></div><div class="t m0 x1 h2 y2d ff1 fs0 fc0 sc0 ls0 ws0">请求和响应过程<span class="_ _1"></span>。<span class="ff3"> </span></div></div></div><div class="pi" data-data='{"ctm":[1.611792,0.000000,0.000000,1.611792,0.000000,0.000000]}'></div></div>

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