struts2 action 中操作request
HttpServletRequest request = ServletActionContext.getRequest();
request.setAttribute("msg", msg);
//遍历maps
<c:forEach var="map" items="${showMap}">
<td>${map.key}</td>
<td>${map.value}</td>
</c:forEach>
//for循环
<c:forEach var="number" begin="1" end="9" step="1">
${number}
</c:forEach>