Jsp jstl

jsp jstl uses
1.jar package import and page import
jstl-1.2.jar
page to add <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>


2. Usage of <c:forEach> The
items parameter is the traversed object, and var is the current traversed element

<c:forEach items="${employeeList}" var="user">
	<tr style="border: 1px solid #ccc;">
		<td align="center">${user.id}</td>
		<td align="center">${user.name}</td>
		<td align="center">
			<c:choose>
				<c:when test="${user.sex == 0}">Male</c:when> //The double quotes here are required
				<c:otherwise>女</c:otherwise>
			</c:choose></td>
		<td align="center"><c:out value="${user.name }"></c:out>${user.height}</td>
	</tr>
</c:forEach>

2. Usage of <c:if else>, if the value in ${} in <c:when> is true, execute (1), otherwise execute (2)

<c:choose>
	<c:when test="${user.sex == 0}">(1)</c:when>
	<c:otherwise>(2)</c:otherwise>
</c:choose>

3. <C:if> If if is true, execute, otherwise do not execute
<c:if test="${1==1}">.....</c:if> //Double quotes here It's required