43 lines
1.1 KiB
Plaintext
43 lines
1.1 KiB
Plaintext
<%@ page contentType="text/html;charset=GB2312" %>
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<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
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<html>
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<head>
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<title>表达式相关的标签</title>
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</head>
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<body>
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<h2>使用<c:out value="<c:out> <c:set> <c:remove>" />的例子</h2>
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<hr>
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<c:set scope="page" var="number">
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<c:out value="${5}"/>
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</c:set>
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<br>
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<c:set scope="request" var="number">
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<c:out value="${15}"/>
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</c:set>
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<br>
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<c:set scope="session" var="number">
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<c:out value="${25}"/>
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</c:set>
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不同作用域的number变量的初始值</p>
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pageScope.number =<c:out value="${pageScope.number}" default="No Data" />
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<br>
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requestScope.number =<c:out value="${requestScope.number}"
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default="No Data" />
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<br>
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sessionScope.number =<c:out value="${sessionScope.number}"
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default="No Data" />
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<br>
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<p><c:out value='执行<c:remove var="number" />之后'/></p>
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<c:remove var="number" scope="request" />
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pageScope.number =<c:out value="${pageScope.number}"
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default="No Data" />
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<br>
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requestScope.number =<c:out value="${requestScope.number}"
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default="No Data" />
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<br>
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sessionScope.number =<c:out value="${sessionScope.number}"
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default="No Data" />
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<br>
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</body>
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</html>
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