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详解JSP文件的创建过程及步骤

2024-01-31 20:41:24 0浏览 收藏

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JSP文件的创建方法和步骤详解

1. 准备工作

在创建JSP文件之前,您需要确保已经安装了以下软件:

  • Java开发工具包(JDK)
  • Apache Tomcat服务器
  • 文本编辑器(如记事本、Notepad++或Sublime Text)

2. 创建JSP文件

  1. 打开文本编辑器,新建一个文件。
  2. 将文件另存为.jsp,例如index.jsp。
  3. 在文件中输入以下代码:
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>



  JSP Example


  

Hello, JSP!

3. 运行JSP文件

  1. 启动Apache Tomcat服务器。
  2. 将JSP文件复制到Tomcat的webapps目录下。
  3. 在浏览器中输入http://localhost:8080/index.jsp。

4. JSP文件详解

  • <%@ page ... %>:这是JSP指令,用于指定JSP文件的语言、内容类型和字符编码。
  • :这是HTML文档类型声明。
  • :这是HTML根元素。
  • :这是HTML头部元素,用于放置元数据。
  • </code>:这是HTML标题元素,用于指定网页的标题。</li><li><code><body></code>:这是HTML主体元素,用于放置网页的内容。</li><li><code><h1></code>:这是HTML一级标题元素,用于显示网页的标题。</li></ul><h3>5. JSP中的Java代码</h3><p>JSP文件可以包含Java代码,这使得JSP文件可以动态地生成HTML代码。Java代码可以使用<code><% %></code>标签包裹起来,例如:</p><pre class="brush:jsp;toolbar:false;"><% int x = 10; int y = 20; int sum = x + y; %> <h1>The sum of x and y is <%= sum %></h1></pre><h3>6. JSP中的表达式</h3><p>JSP文件可以使用表达式来计算值,表达式可以使用<code><%= %></code>标签输出,例如:</p><pre class="brush:jsp;toolbar:false;"><h1>The current time is <%= new java.util.Date() %></h1></pre><h3>7. JSP中的动作</h3><p>JSP文件可以使用动作来执行某些操作,动作可以使用<code><jsp:action ... %></code>标签指定,例如:</p><pre class="brush:jsp;toolbar:false;"><jsp:forward page="login.jsp"/></pre><h3>8. JSP中的标签库</h3><p>JSP文件可以使用标签库来简化代码,标签库可以使用<code><jsp:useBean ... %></code>和<code><jsp:setProperty ... %></code>标签指定,例如:</p><pre class="brush:jsp;toolbar:false;"><jsp:useBean id="user" class="com.example.User"/> <jsp:setProperty name="user" property="name" value="John Doe"/> <h1>Hello, <%= user.getName() %>!</h1></pre><h3>9. JSP中的错误处理</h3><p>JSP文件可以使用<code><jsp:errorPage ... %></code>标签指定错误页面,例如:</p><pre class="brush:jsp;toolbar:false;"><jsp:errorPage page="error.jsp"/></pre><h3>10. 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class="selfTabCont loginFormBox" style="display: block;"> <form name="form" id="login-form" class="form-vertical form" method="POST" action="/index/user/login"> <input type="hidden" name="url" value="//www.17golang.com/article/92892.html"/> <input type="hidden" name="__token__" value="28eaa7a1f1e8bbc6d43323f3a3b1b105" /> <div class="form-group" style="height:70px;"> <input class="form-control" id="account" type="text" name="account" value="" data-rule="required" placeholder="邮箱/用户名" autocomplete="off"> </div> <div class="form-group" style="height:70px;"> <input class="form-control" id="password" type="password" name="password" data-rule="required;password" placeholder="密码" autocomplete="off"> </div> <div class="codeBox" style="height:70px;"> <div class="form-group" style="height:70px; width:205px; float: left;"> <input type="text" name="captcha" class="form-control" placeholder="验证码" data-rule="required;length(4)" /> </div> <span class="input-group-btn" style="padding:0;border:none;"> <img src="/captcha.html" width="100" height="45" onclick="this.src = '/captcha.html?r=' + Math.random();"/> </span> </div> <div class="other"> <a href="#" class="forgetPwd aGray" onclick="$('.loginInfo').hide();$('.passwordForget').show();" title="忘记密码">忘记密码</a> </div> <div class="loginBtn mt25"> <button type="submit">登录</button> </div> </form> </div> <div class="selfTabCont registerFormBox" style="display: none;"> <form name="form1" id="register-form" class="form-vertical form" method="POST" action="/index/user/register"> <input type="hidden" name="invite_user_id" value="0"/> <input type="hidden" name="url" value="//www.17golang.com/article/92892.html"/> <input type="hidden" name="__token__" value="28eaa7a1f1e8bbc6d43323f3a3b1b105" /> <div class="form-group" style="height:70px;"> <input type="text" name="email" id="email2" data-rule="required;email" class="form-control" placeholder="邮箱"> </div> <div class="form-group" style="height:70px;"> <input type="text" id="username" name="username" data-rule="required;username" class="form-control" placeholder="用户名必须3-30个字符"> </div> <div class="form-group" style="height:70px;"> <input type="password" id="password2" name="password" data-rule="required;password" class="form-control" placeholder="密码必须6-30个字符"> </div> <div class="codeBox" style="height:70px;"> <div class="form-group" style="height:70px; width:205px; float: left;"> <input type="text" name="captcha" class="form-control" placeholder="验证码" data-rule="required;length(4)" /> </div> <span class="input-group-btn" style="padding:0;border:none;"> <img src="/captcha.html" width="100" height="45" onclick="this.src = '/captcha.html?r=' + Math.random();"/> </span> </div> <div class="loginBtn"> <button type="submit">注册</button> </div> </form> </div> </div> </div> <div class="beforeLoginTip">登录即同意 <a href="https://www.17golang.com/about/3.html" target="_blank" class="aBlue" title="用户协议">用户协议</a> 和 <a href="https://www.17golang.com/about/4.html" target="_blank" class="aBlue" title="隐私政策">隐私政策</a></div> </div> <!-- 重置密码 --> <div class="loginInfo passwordForget"> <div class="closeIcon" onclick="$('.popupBg').hide();"></div> <div class="returnLogin cursorPointer" onclick="$('.passwordForget').hide();$('.passwordLogin').show();">返回登录</div> <div class="passwordInfo"> <ul class="logintabs selfTabMenu"> <li class="selfTabItem">重置密码</li> </ul> <div class="selfTabContBox"> <div class="selfTabCont"> <form id="resetpwd-form" class="form-horizontal form-layer nice-validator n-default n-bootstrap form" method="POST" action="/api/user/resetpwd.html" novalidate="novalidate"> <div style="height:70px;"> <input type="text" class="form-control" id="email" name="email" value="" placeholder="输入邮箱" aria-invalid="true"> </div> <div class="codeBox" style="height:70px;"> <div class="form-group" style="height:70px; width:205px; float: left;"> <input type="text" name="captcha" class="form-control" placeholder="验证码" /> </div> <span class="input-group-btn" style="padding:0;border:none;"> <a href="javascript:;" class="btn btn-primary btn-captcha cursorPointer" style="background: #2080F8; border-radius: 4px; color: #fff; padding: 12px; position: absolute;" data-url="/api/ems/send.html" data-type="email" data-event="resetpwd">发送验证码</a> </span> </div> <input type="password" class="form-control" id="newpassword" name="newpassword" value="" placeholder="请输入6-18位密码"> <div class="loginBtn mt25"> <button type="submit">重置密码</button> </div> </form> </div> </div> </div> </div> </div> </div> <script src="/assets/js/juejin-theme.js?v=20260613b" defer></script> <script> var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?e34c3e8ab31ba35d7e1c48ea8d77315f"; var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(hm, s); })(); </script> <script src="/assets/js/frontend/common.js"></script> </body> </html>