TA的每日心情 | 开心 2021-3-12 23:18 |
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签到天数: 2 天 [LV.1]初来乍到
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- 我们常用:
- request.getParameter(String name)和
- request.getParameterValues(String name)
- 取得用户在表单中输入的数据,但在EL中可以使用隐含对象param和
- paramValues来取得数据。如下所示:
- ${param.name}
- ${paramValues.name}
-
- 这里param的功能和request.getParameter(String name}相同,
- 而paramValues
- 和request.getParameterValues(String name)相同。
- 请看例子:
- 表单(Form.html)
- <html>
- <head>
- <title>Form.html</title>
复制代码
<meta http-equiv="Content-Type" content="text/HTML; charset=GB2312"> </head>
<body>
<form name="Example" method="post" action="Form.jsp">
<p> 姓名:<input type="text" name="Name" size="15" maxlength="15"></p>
<p> 密码:<input type="password" name="Password" size="15" maxlength="15"></p>
<p> 性别:<input type="radio" name="Sex" value="Male" checked>男
<input type="radio" name="Sex" value="Female">女</p>
<p> 年龄:
<select name="Old">
<option value="10">10 ~ 20</option>
<option value="20" selected>21 ~ 30</option>
<option value="30">31 ~ 40</option>
<option value="40">41 ~ 65</option>
</select>
</p>
<p> 兴趣:
<input type="checkbox" name="Habit" value="Read">
看书
<input type="checkbox" name="Habit" value="Game">
电玩
<input type="checkbox" name="Habit" value="Travel">
旅游
<input type="checkbox" name="Habit" value="Music">
听音乐
<input type="checkbox" name="Habit" value="Tv">
看电视</p>
<p>
<input type="submit" value="提交">
<input type="reset" value="清除">
</p>
</form>
</body>
</html> 二、处理表单的JSP文件 <%@ page contentType="text/html;charset=GB2312" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<html>
<head>
<title>CH9 - Form.jsp</title>
</head>
<body> <h2>使用 EL、JSTL 处理表单数据</h2>
<fmt:requestEncoding value="GB2312" /> 姓名:<c:out value="${param.Name}" default="Nothing" /> <br>
密码:<c:out value=" ${param.Password} " default="Nothing" /><br>
性别:<c:if test="${param.Sex == "Male"}">男<br></c:if>
<c:if test="${param.Sex == "Female"}">女<br></c:if>
年龄:<c:choose>
<c:when test="${param.Old == 10}">10 ~ 20<br></c:when>
<c:when test="${param.Old == 20}">21 ~ 30<br></c:when>
<c:when test="${param.Old == 30}">31 ~ 40<br></c:when>
<c:otherwise>41 ~ 65<br></c:otherwise>
</c:choose>
兴趣:<c:forEach items="${paramValues.Habit}" var="habit">
<c:choose>
<c:when test="${habit == "Read"}"><li>看书1</li></c:when>
<c:when test="${habit == "Game"}"><li>电玩</li></c:when>
<c:when test="${habit == "Travel"}"><li>旅游</li></c:when>
<c:when test="${habit == "Music"}"><li>听音乐</li></c:when>
<c:when test="${habit == "Tv"}"><li>看电视</li></c:when>
</c:choose>
</c:forEach>
</body>
</html>
源码下载:http://file.javaxxz.com/2014/10/29/235723609.zip |
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