conditional.jsp

来自「达内JAVA培训-WEB课程部分项目源代码」· JSP 代码 · 共 30 行

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<c:if test="${!empty param.userName}" var="hasStudent">
	Hello,${param.userName}<br>
</c:if>
<c:if test="${!hasStudent}">
	The user is not found.<br>
</c:if>
<c:set var="color" value="red"/>
		
<c:choose>
	<c:when test="${param.age < 18}">
		<c:set var="color" value="green"/>
	</c:when>
	<c:when test="${param.age < 28}">
		<c:set var="color" value="yellow"/>
	</c:when>
	<c:when test="${param.age < 38}">
		<c:set var="color" value="brown"/>
	</c:when>
	<c:when test="${param.age < 68}">
		<c:set var="color" value="blue"/>
	</c:when>
	<c:when test="${param.age < 88}">
		<c:set var="color" value="gray"/>
	</c:when>
	<c:otherwise>
		<c:set var="color" value="black"/>
	</c:otherwise>
</c:choose>
<font color="${color}">welcome to JSTL</font>