如何遍历地图和struts 2中的地图值

Question

i need help here in resolving an issue. I am migrating an existing struts2 based web app to spring boot, I have managed to do that however the below piece of code is not working as expected. Any help would be appreciated.

<s:iterator value="{#session['user'].menu}" id = "item" status="rowStatus">
  <div class='menucontent_bg' id ='menumenucontent_<s:property value="#rowStatus.index"/>'>
    <s:iterator value="value" id = "menu"> 
      <div class=menucontent_heading>
        <a href='javascript:createTab("<s:property value ="#menu.menuOption"/>", <s:property value ="#menu.menuUrl"/>");'>

          <s:property value ="#menu.menuOption"/>
        </a>
      </div>
    </s:iterator>
  </div>
</s:iterator>

In the above code iteration is taking place as expected but the javascript method call to createTab is being done with empty parameters which means #menu.menuOption and other parameter passed is returning empty string, which

I am not sure why as I verified with a simple scriptlet and the values are not empty and also the same code is there in production. I upgraded struts version to 2.5.1 for migration purpose.

Answer 1

<a 
  href='javascript:createTab(". <s:property value ="#menu.menuOption"/>", 
        <s:property s:property value ="#menu.menuUrl"/>");'>

This is (at the very least):

• Missing a quote
• Has a spurious s:property in the middle of the second parameter

It's almost always better, and clearer, to use intermediate values and/or functions to do work like this, eg, move the JS into a support function, so you can read your own code.

Answer 2

I finally managed to find a solution. the problem was not just with iterating over a map but was with all the iteration related code in my project. So i searched with different options and finally got the answer in the link below

How do you iterate through a list of objects?

with struts 2.2.x id attribute has been deprecated and replaced with var for the iterator tag. so now the working code is as below

               <s:iterator value="{#session['user'].menu}" var= "item" status="rowStatus">
              <div class='menucontent_bg' id 
                     ='menumenucontent_<s:property 
                           value ="#rowStatus.index"/>'>
                     <s:iterator value="value" var = "menu"> 
                     <div class=menucontent_heading>
                        <a href='javascript:createTab("<s:property         value ="#menu.menuOption"/>", <s:property value 
                                                  ="#menu.menuUrl"/>");'>

                           <s:property value ="#menu.menuOption"/>
                       </a>
                    </div>
                    </s:iterator>
              </div>
              </s:iterator>