List of the Interceptors:-
Here are the list populated for the default interceptor of struts 2 framework.
Interceptor classes are also defined using a key-value pair specified
in the Struts configuration file. The names specified below come
specified in struts-default.xml. If you extend the
struts-default package, then you can use the names below. Otherwise,
they must be defined in your package with a name-class pair specified in
the <interceptors> tag.
| Interceptor | Name | Description |
|---|---|---|
| Alias Interceptor | alias | Converts similar parameters that may be named differently between requests. |
| Chaining Interceptor | chain | Makes the previous Action's properties available to the current Action. Commonly used together with <result type="chain"> (in the previous Action). |
| Checkbox Interceptor | checkbox | Adds automatic checkbox handling code that detect an unchecked checkbox and add it as a parameter with a default (usually 'false') value. Uses a specially named hidden field to detect unsubmitted checkboxes. The default unchecked value is overridable for non-boolean value'd checkboxes. |
| Cookie Interceptor | cookie | Inject cookie with a certain configurable name / value into action. (Since 2.0.7.) |
| CookieProvider Interceptor | cookieProvider | Transfer cookies from action to response (Since 2.3.15.) |
| Conversion Error Interceptor | conversionError | Adds conversion errors from the ActionContext to the Action's field errors |
| Create Session Interceptor | createSession | Create an HttpSession automatically, useful with certain Interceptors that require a HttpSession to work properly (like the TokenInterceptor) |
| DebuggingInterceptor | debugging | Provides several different debugging screens to provide insight into the data behind the page. |
| DeprecationInterceptor | deprecation | When devMode is on, logs all unknown or deprecated settings |
| Execute and Wait Interceptor | execAndWait | Executes the Action in the background and then sends the user off to an intermediate waiting page. |
| Exception Interceptor | exception | Maps exceptions to a result. |
| File Upload Interceptor | fileUpload | An Interceptor that adds easy access to file upload support. |
| I18n Interceptor | i18n | Remembers the locale selected for a user's session. |
| Logger Interceptor | logger | Outputs the name of the Action. |
| Message Store Interceptor | store | Store and retrieve action messages / errors / field errors for action that implements ValidationAware interface into session. |
| Model Driven Interceptor | modelDriven | If the Action implements
ModelDriven, pushes the getModel Result onto the Value Stack. |
| Scoped Model Driven Interceptor | scopedModelDriven | If the Action implements
ScopedModelDriven, the interceptor retrieves and stores the model from a
scope and sets it on the action calling setModel. |
| Parameters Interceptor | params | Sets the request parameters onto the Action. |
| Prepare Interceptor | prepare | If the Action implements
Preparable, calls its prepare method. |
| Scope Interceptor | scope | Simple mechanism for storing Action state in the session or application scope. |
| Servlet Config Interceptor | servletConfig | Provide access to Maps representing HttpServletRequest and HttpServletResponse. |
| Static Parameters Interceptor | staticParams | Sets the struts.xml
defined parameters onto the action. These are the <param> tags that are
direct children of the <action> tag. |
| Roles Interceptor | roles | Action will only be executed if the user has the correct JAAS role. |
| Timer Interceptor | timer | Outputs how long the Action takes to execute (including nested Interceptors and View) |
| Token Interceptor | token | Checks for valid token presence in Action, prevents duplicate form submission. |
| Token Session Interceptor | tokenSession | Same as Token Interceptor, but stores the submitted data in session when handed an invalid token |
| Validation Interceptor | validation | Performs validation using the validators defined in action-validation.xml |
| Default Workflow Interceptor | workflow | Calls the validate
method in your Action class. If Action errors are created then it returns
the INPUT view. |
| Parameter Filter Interceptor | N/A | Removes parameters from the list of those available to Actions |
| Profiling Interceptor | profiling | Activate profiling through parameter |
| Multiselect Interceptor | multiselect | Like the checkbox interceptor detects that no value was selected for a field with multiple values (like a select) and adds an empty parameter |