Struts2.5.16无法调用Action问题咨询（附Eclipse中web.xml片段）

Since your provided web.xml content cuts off at the filter section, that’s the most likely culprit for your action not being called. Here are the key checks and fixes to resolve this:

1. Verify Struts2 Filter Configuration in web.xml #

Struts2.5.x uses an updated filter class—this is a common source of issues when upgrading from older versions. Ensure your filter is defined correctly like this:

<filter>
    <filter-name>struts2</filter-name>
    <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

Note: Older Struts2 versions used org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter, but this was deprecated in 2.5.x. Switch to the new class above if you’re still using the old one.

2. Confirm Correct Struts2 Core Dependency #

Make sure your project includes the right core library for 2.5.16:

• For Maven projects, add this dependency to your pom.xml:

  <dependency>
      <groupId>org.apache.struts</groupId>
      <artifactId>struts2-core</artifactId>
      <version>2.5.16</version>
  </dependency>
  

• For non-Maven projects, check that struts2-core-2.5.16.jar is present in your WEB-INF/lib directory.

3. Validate struts.xml Configuration #

Double-check your action mapping in struts.xml for typos or misconfigurations:

<package name="default" namespace="/" extends="struts-default">
    <action name="myAction" class="com.yourpackage.MyActionClass">
        <result name="success">/success.jsp</result>
    </action>
</package>

• Ensure the action name, fully qualified class path, and namespace match your request URL.
• Confirm struts.xml is placed in the correct location: src/main/resources (Maven) or WEB-INF/classes (non-Maven).

4. Check URL Pattern Matching #

If your filter mapping uses a specific pattern (not /*), make sure your request URL aligns with it. For example, if you use *.action, your request should look like http://localhost:8080/Struts2Starter/myAction.action.

5. Enable Debug Logging for Detailed Insights #

Turn on debug logging for Struts2 to catch hidden errors. Add this to your log4j2.xml (or equivalent logging config):

<Logger name="org.apache.struts2" level="debug" additivity="false">
    <AppenderRef ref="Console"/>
</Logger>

This will log whether the filter is processing your request, if the action is being located, or if there are configuration mismatches.

If you can share the full web.xml and struts.xml content, I can help pinpoint the exact issue more precisely.

内容的提问来源于stack exchange，提问作者awnish3