Adding json plugin to GAE struts2 project in intellij

[user2054833 via StackOverflow]

I create a GAE application and included the Struts2 Framework using Intellij Ultimate. Intellij downloaded the dependencies and everything worked ok. I now need to add the struts2-json-plugin-2.3.12.jar to use within my app because intellij didn't download it as one of struts2 dependencies. I copy the jar to my projects lib folder and then navigate to file > project structure > struts2 > edit > and add the jar. The problem I am having is that when I go to my struts.xml file and add extends="json-default" I'm getting:

 Cannot result Struts Package 'json-default'

How can I fix this problem?

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http://stackoverflow.com/questions/15993176/adding-json-plugin-to-gae-struts2-project-in-intellij

[user2054833 via StackOverflow]

I create a GAE application and included the Struts2 Framework using Intellij Ultimate. Intellij downloaded the dependencies and everything worked ok. I now need to add the struts2-json-plugin-2.3.12.jar to use within my app because intellij didn't download it as one of struts2 dependencies. I copy the jar to my projects lib folder and then navigate to file > project structure > struts2 > edit > and add the jar. The problem I am having is that when I go to my struts.xml file and add extends="json-default" I'm getting:

 Cannot result Struts Package 'json-default'

How can I fix this problem?

Jars in my lib folder:

• asm.jar
• asm-commons.jar
• asm-tree.jar
• commons-fileupload.jar
• commons-io.jar
• commons-lang.jar
• commons-lang3-3.1.jar
• commons-lang-2.4.jar
• commons-logging-1.1.1.jar
• freemarker.jar
• javassist.jar
• ognl.jar
• struts2-core.jar
• struts2-json-plugin-2.3.12.jar
• struts2-junit-plugin-2.3.12.jar
• xwork-core.jar