Struts2 Action被调用两次

Question

I am calling struts action like

<a href="someactionLink.action">Do action</a>

In Struts.xml

<action name="*Link" method="{1}" class="com.shashi.getalldata.LinkAction">

The problem is the action called twice. Once when i click the href and second time while page loading. Do any one have any idea on what's the case here?

Answer 1

Do you have anything on the page that could result in a subsequent request? Eg favicon/stylesheet/image/script. By favicon, I mean lack of, but the browser might be looking (most browsers only look in one place for them).

Check the access logs for a subsequent request.

Answer 2

Take a look at this link. It helped me figure out my issue with a double submit. It had nothing to do with my code, it was completely YSlow plug-in for FireFox 3.X and 4.X.

Double submit solution

Answer 3

Solution to my double submit issue.

first off: I was doing a form submit using javascript. Like:

<a href="#" onclick="save();">
      <input type="image" src="images/save.gif" alt="Save" title="Save" /></a>

where save() was:

function save() {
     ...
     document.form_name.action = "Struts2_action.action";
     document.forms[1].submit(); 
   }

Well I was NOT adding "return false;" after save() to do the following:

Return false follow three steps

• First It stops the browsers default behaviour.
• It prevents the event from propagating the DOM
• Stops callback execution and returns immediately when called.

So, my anchor became:

<a href="#" onclick="save();return false;">
          <input type="image" src="images/save.gif" alt="Save" title="Save" /></a>

and the double submit problem was resolved.