标签应用
实现一个功能（根据下拉框的改变页面格式而改变）
前台：
<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
<script language="javascript">
function getValue()
{
$.ajax( {
cache : false,
url : "emsAction!edit.action",
async : false,
data: param,
type : 'post',
dataType : 'json',
success : function(data) {
} });
document.getElementById("system_ems_addNT2000_from").submit();
}
}
</script>
</head>
<body>
<form action="" id="system_ems_addNT2000_from" method="post">
<s:set name="showAccessDevice" value="isOrShowAccessDevice"></s:set>
<input type="hidden" id="enableAccess" value="<s:property value='isNoOrOff'/>">
<s:if test="#showAccessDevice == 'true'">
内容
</table>
</s:if>
<s:else></s:else>
</form>
</body>
</html>
后台action
public String edit()
{
if(null == strU2000Req)
{
strU2000Req = U2000V1R1;
}
HttpServletRequest requestEms = ServletActionContext.getRequest();
if(ISU2000.equals(requestEms.getAttribute("U2000ems"))
&& (!U2000V1R1.equals(strU2000Req)))
{
isOrShowEms = "true";
isOrShowAccessDevice = "true";
isNoOrOff="on";
}
else{
isOrShowEms = "false";
isOrShowAccessDevice = "false";
}
return returnValue;
}
xml配置：
<action name="emsAction" class="emsAction">
<result name="edit">emsAdd.jsp</result>
</action>