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
StrutsPrepareAndExecuteFilter
The org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter was moved to org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter.
In web.xml replace this:
<filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class></filter> |
with that:
<filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class></filter> |
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:
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" |
with 2.5:
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN" |
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:
<s:url id="url" action="login"> |
change it to:
<s:url var="url" action="login"> |
The <s:set> tag name attribute is replaced with var attribute.
From:
<s:set id="str1" value="'string1 value'" /><s:set name="str2" value="'string2 value'" /> |
to:
<s:set var="str1" value="'string1 value'" /><s:set var="str2" value="'string2 value'" /> |
Also escape attribute was renamed to escapeHtml attribute.
From:
<s:property escape="true" var="someProperty"/> |
to:
<s:property escapeHtml="true" var="someProperty"/> |
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:
private String sTrng;public String getSTrng() {...}public void setSTrng(String str) {...} |
change accessors to getsTrng and setsTrng.
Or better yet, change field names to not contain single lower case letter:
private String strng;public String getStrng() {...}public void setStrng(String str) {...} |
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:
<dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-tiles-plugin</artifactId> <version>${struts2.version}</version></dependency> |
You may need to update DTD in your tiles.xml files to Tiles3:
<!DOCTYPE tiles-definitions PUBLIC "-//Apache Software Foundation//DTD Tiles Configuration 3.0//EN" |
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.
<listener> <listener-class>org.apache.struts2.tiles.StrutsTilesListener</listener-class></listener> |
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.
来源:https://cwiki.apache.org/confluence/display/WW/Struts%202.3%20to%202.5%20migration