Apache Struts 2 is an elegant, extensible framework for creating enterprise-ready Java web applications. The framework is designed to streamline the full development cycle, from building, to deploying, to maintaining applications over time.

Apache Struts 2 was originally known as WebWork 2. After working independently for several years, the WebWork and Struts communities joined forces to create Struts2. This new version of Struts is simpler to use and closer to how Struts was always meant to be.

concepts

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Site, http://struts.apache.org/

• Filter Dispatcher
• 處理使用者請求
  
• Interceptors
• 
  
• Actions
• Results
• Plug-ins
  

Setting web.xml

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Setting Struts.xml

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• WEB-INF/classes/struts.xml

http://struts.apache.org/2.1.8.1/docs/hello-world-using-struts-2.html

ActionSupports

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extends ActionSupport

Action

• Default: execute(), public String execute()
• 
  

TextProvider

• Message