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https://issues.apache.org/jira/browse/WW-4701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15659970#comment-15659970
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Hudson commented on WW-4701:
----------------------------
SUCCESS: Integrated in Jenkins build Struts-JDK7-master #552 (See
[https://builds.apache.org/job/Struts-JDK7-master/552/])
WW-4701 Drop parameter if not defined (lukaszlenart: rev
986b43f3147c73611fdb3956fdbd4fe01a06e550)
* (edit) core/src/main/java/org/apache/struts2/components/Param.java
> Can no longer clear parameter on a <s:url> tag.
> -----------------------------------------------
>
> Key: WW-4701
> URL: https://issues.apache.org/jira/browse/WW-4701
> Project: Struts 2
> Issue Type: Bug
> Affects Versions: 2.5.5
> Reporter: Adam Greenfield
> Assignee: Lukasz Lenart
> Fix For: 2.5.6
>
>
> Consider the following:
> {noformat}
> <s:url action=“init” includeParams=“get”>
> <s:param name="param1" value="" />
> </s:url>
> {noformat}
> Before 2.5.5, this would have removed “param1” from the generated url if it
> was present. (The evaluated value would have been null, and so
> Component.addParameter(name, value) would have removed the parameter).
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