答：<c:if>、<c:choose>、<c: when>、<c: otherwise>、<c:forEach>、<c:set>。
答：<bean:message /> <html:errors />
<bean:include /> <html:messages />
<bean:define /> <html:html>
<bean:write /> <html:form>
<bean:resource /> <html:link>
<bean:cokkie /> <html:text>
<bean:heder /> <logic:present />
<bean:parameter /> <logic:equal />
<bean:size />
......
