struts 2, tiles 2 dynamic title

问题

I am using tiles 2.0.6 as my template framework together with struts 2.1.6. I am writing a simple cms page and want to let the user to define the title of each html page.

I have a title definition like this

    <definition name="base" template="/WEB-INF/jsp/templates/base.jsp">
        <put-attribute name="title" value=" "/>
        <put-attribute name="header" value="/WEB-INF/jsp/templates/header.jsp"/>  
        <put-attribute name="content" value="dummy"/>
        <put-attribute name="footer" value="/WEB-INF/jsp/templates/footer.jsp"/>   
        <put-attribute name="search" value="/WEB-INF/jsp/search.jsp"/>
    </definition>    
    <definition name="staticview" extends="base">
        <put-attribute name="title" value=" - Static"/>
        <put-attribute name="content" value="/WEB-INF/jsp/static/view.jsp"/>
    </definition>

Instead of making the title a jsp, is there a way to dynamically override the title (String) on my header.jsp in the later jsp attribute, for example view.jsp. Or even 1 step further using EL

<put-attribute name="title" value="%{title}"/>

and have it pick up the title on the struts ognl dynamically.

Please advise

Thanks in advance

回答1:

In the view page we need to have this -

<title><tiles:getAsString name="title" /></title>

Above will get you the title for the page. Except, since we want the page title to be dynamic, in the tiles.xml configuration, I added

<definition name="page1" extends="base">
    <put-attribute name="title" value="Page 1"/>
    <put-attribute name="content" value="/WEB-INF/jsp/page1.jsp"/>
</definition>
<definition name="page2" extends="base">
    <put-attribute name="title" value="Page 2"/>
    <put-attribute name="content" value="/WEB-INF/jsp/page2.jsp"/>
</definition>

Now this may seem like typing it will make it look like it is static. But every time you view that page, the title should be the same for that page. What better place to have this information that on tiles.xml.

For me it was not the title itself, but I needed different page headings. I didn't want to look at the context attribute to get the path of the page and determine the heading for the page. So, this worked for me and kept everything loosely coupled.

This works if you want a different dynamic heading for each page or anything similar.

回答2:

Keep the tiles definition like this:

    <put-attribute name="title" value=""/>

Add title as a property of in your action class.

And in view.jsp page use this:

    <tiles:insertDefinition name="staticview">
        <tiles:putAttribute name="title"> 
            ${title} <%--OR, <s:property value="title"/>--%>
        </tiles:putAttribute>
        <%--Remainning content--%>
    </tiles:insertDefinition>

回答3:

I tried this, and it works.

Code1

<tiles:putAttribute name="title"> 
          You String
</tiles:putAttribute>

Code 2

<tiles:insertAttribute name="title" />

But code1 must execute before code2.

回答4:

The best solution in my opinion is to use expression instead of value in the tiles definition and pass ${title}. But you would have to do it in each view explicitly, unfortunately. See more at http://symfony-world.blogspot.com/2013/02/dynamic-attribute-values-with-apache.html

回答5:

Found this simple solution elsewhere:

Tiles attribute definition as usual:

 <put-attribute name="title"  value="welcome.title"/>

On an jsp page the attribute is first imported and then it can be used with struts tags:

<tiles:importAttribute name="title" />
<title><s:text name="%{#attr['title']}"/></title>

回答6:

I add the title to the request in the action class, here's my JSP code for the template (tiles 1):

<title>
    <tiles:getAsString name="title"/>
    <%-- add additional title (if found) --%>
    <logic:present scope="request" name="title"><bean:write scope="request" name="title"/></logic:present>
</title>

来源：https://stackoverflow.com/questions/1552094/struts-2-tiles-2-dynamic-title

标签

jsp

struts2

ognl

tiles2