<c:choose>标签

<c:choose>
	<c:when test="${param.action=='changeLanguage'}"><jsp:forward page="install/install_change_language.jsp"/></c:when>
	<c:when test="${param.action=='license'}"><jsp:forward page="install/install.jsp"/></c:when>
	<c:when test="${param.action=='check'}"><jsp:forward page="install/install_check.jsp"/></c:when>
	<c:when test="${param.action=='config'}"><jsp:forward page="install/install_config.jsp"/></c:when>
	<c:when test="${param.action=='admin'}"><jsp:forward page="install/install_admin.jsp"/></c:when>
	<c:when test="${param.action=='install'}"><jsp:forward page="install/install_install.jsp"/></c:when>
	<c:when test="${param.action=='showMessage'}"><jsp:forward page="install/install_message.jsp"/></c:when>
	<c:otherwise><jsp:forward page="install/install_language.jsp"/></c:otherwise>
</c:choose>

当test为true时，则执行<c:when ></c:when>之间的代码，

如果所有的test都为false，则执行<c:otherwise></c:otherwise>之间的代码。