Struts 2框架提供了良好的预配置，并准备使用的盒拦截。下面列出了几个重要的拦截器：
| SN | Interceptor & 描述 |
|---|---|
| 1 | alias Allows parameters to have different name aliases across requests. |
| 2 | checkbox Assists in managing check boxes by adding a parameter value of false for check boxes that are not checked. |
| 3 | conversionError Places error information from converting strings to parameter types into the action's field errors. |
| 4 | createSession Automatically creates an HTTP session if one does not already exist. |
| 5 | debugging Provides several different debugging screens to the developer. |
| 6 | execAndWait Sends the user to an intermediary waiting page while the action executes in the background. |
| 7 | exception Maps exceptions that are thrown from an action to a result, allowing automatic exception handling via redirection. |
| 8 | fileUpload Facilitates easy file uploading. |
| 9 | i18n Keeps track of the selected locale during a user's session. |
| 10 | logger Provides simple logging by outputting the name of the action being executed. |
| 11 | params Sets the request parameters on the action. |
| 12 | prepare This is typically used to do pre-processing work, such as setup database connections. |
| 13 | profile Allows simple profiling information to be logged for actions. |
| 14 | scope Stores and retrieves the action's state in the session or application scope. |
| 15 | ServletConfig Provides the action with access to various servlet-based information. |
| 16 | timer Provides simple profiling information in the form of how long the action takes to execute. |
| 17 | token Checks the action for a valid token to prevent duplicate formsubmission. |
| 18 | validation Provides validation support for actions |
完整的细节上面提到的拦截，请loook到Struts2文档。但我会告诉你如何使用拦截器，一般在你的Struts应用程序。