用例描述:
A页面:http://localhost:8080/Houser/newsManage.action?categoryname=402880f5122bc83801122bd89fae0005
B页面:newsManage.ftl
在ftl页面这样写:
${request.getParameter("categoryname")}
但是假如你要用<#if 指令让${request.getParameter("categoryname")}参与比较呢?有一个小地方要注意一下:
正确写法:
1)
<#list pagesdatas as ls>
<#if ls.newscategory.id?default("") = ‘${request.getParameter("categoryname")}‘>
.....................
</#if>
</#list>
2)
<#list pagesdatas as ls>
<#if ls.newscategory.id?default("") = "${request.getParameter(‘categoryname‘)}">
.....................
</#if>
</#list>
3
<#list pagesdatas as ls>
<#if ls.newscategory.id?default("") = "${request.getParameter(\"categoryname\")}">
.....................
</#if>
</#list>
错误写法:
<#list pagesdatas as ls>
<#if ls.newscategory.id?default("") = "${request.getParameter("categoryname")}">
.....................
</#if>
</#list>
原因:估记应该是4个双引号冲突了
补充:把${request.getParameter("categoryname")}赋值给变量的正确写法:
1)<#assign var ="${request.getParameter(‘categoryname‘)}">
2) <#assign var =‘${request.getParameter(‘categoryname‘)}‘>
3)<#assign var ="${request.getParameter(\"categoryname\")}">