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  • Struts 2.3 to 2.5 migration
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Dependencies

Update Struts dependencies to 2.5.

Remove the following plugin dependencies because they were dropped and aren't supported anymore.

  • Dojo Plugin
  • Codebehind Plugin
  • JSF Plugin
  • Struts1 Plugin

Please be aware that the framework is using Log4j2 now as a main logging layer, the existing old logging layer is deprecated and will be removed soon. Log4j2 supports many different logging implementations, please check documentations for more details.

StrutsPrepareAndExecuteFilter

The org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter was moved to org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.

In web.xml replace this:

with that:

There were other package changes, please read Version Notes 2.5 for more details.

DTD

Struts DTD was updated to 2.5 version.

In struts.xml replace 2.3 DTD version:

with 2.5:

HTML 5

All the core themes are now HTML 5 compliant which means using a required attribute in your tags will produce a proper browser's validation.

Tags attributes

The id attribute was replaced with var attribute in the following tags.

  • <s:action>
  • <s:append>
  • <s:bean>
  • <s:date>
  • <s:generator>
  • <s:iterator>
  • <s:merge>
  • <s:number>
  • <s:set>
  • <s:sort>
  • <s:subset>
  • <s:text>
  • <s:url>


If you have something like that in your code: 

change it to:


The <s:set> tag name attribute is replaced with var attribute.

From:

to:

Also escape attribute was renamed to escapeHtml attribute.

From:

to:

Div tag

The <s:div> tag was dropped.

Replace <s:div> with plain HTML <div> tag.

Field names

If you have field names which starts with single lower case letter, for example:


change accessors to getsTrng and setsTrng.

Or better yet, change field names to not contain single lower case letter:


For additional info see WW-3909.

Tiles

Depending on from which version of struts you upgrade and whether you used tiles-plugin or tiles3-plugin you may need to do different steps.

Struts 2.5 just provides a tiles-plugin which uses Tiles3. So support for Tiles2 has been dropped as well as the name tiles3-plugin.

Now the only maven dependency looks like this:

maven dependecy for tiles-plugin

 

You may need to update DTD in your tiles.xml files to Tiles3:

tiles3 dtd

 

A Listener in web.xml is required. It is not necessary to configure paths to tiles.xml files here as they are picked up automatically.

StrutsTilesListener in web.xml

 

Optionally you may remove TilesDefinitions from XML and annotate actions instead. See Tiles Plugin for more details.

Temp/Work directory of ApplicationServer/ServletContainer

Users reported it was necessary for them to remove temp/work directory of their ApplicationServer/ServletContainer. Likely to force server to recompile JSPs.

New Locale aware conversion logic

As from Struts 2.5.12 a new conversion logic was introduced which can affect your applications when using uncommon solutions. One of these is to use a number literals in Freemarker template. In such case Freemarker treats them as numbers (as BigDecimals) and Struts logic converts them to a string with decimal zero, see the example below:

this snippet will produce the following Html control:

To resolves this problem you must add quotes around the value:

This is due how Freemarker treats a number literals.