org.springframework.web.servlet.view.velocity

## Class VelocityViewResolver

- java.lang.Object
- - org.springframework.context.support.ApplicationObjectSupport
  - - org.springframework.web.context.support.WebApplicationObjectSupport
    - - org.springframework.web.servlet.view.AbstractCachingViewResolver
      - - org.springframework.web.servlet.view.UrlBasedViewResolver
        - - org.springframework.web.servlet.view.AbstractTemplateViewResolver
          - - org.springframework.web.servlet.view.velocity.VelocityViewResolver

- All Implemented Interfaces:
    Aware, ApplicationContextAware, Ordered, ServletContextAware, ViewResolver
  Direct Known Subclasses:
    VelocityLayoutViewResolver

      public class VelocityViewResolver
      extends AbstractTemplateViewResolver

  Convenience subclass of `UrlBasedViewResolver` that supports `VelocityView` (i.e. Velocity templates) and custom subclasses of it.

  The view class for all views generated by this resolver can be specified via the "viewClass" property. See UrlBasedViewResolver's javadoc for details.

  Note: When chaining ViewResolvers, a VelocityViewResolver will check for the existence of the specified template resources and only return a non-null View object if the template was actually found.

  Since:
    13.12.2003
  Author:
    Juergen Hoeller
  See Also:
    `UrlBasedViewResolver.setViewClass(java.lang.Class)`, `UrlBasedViewResolver.setPrefix(java.lang.String)`, `UrlBasedViewResolver.setSuffix(java.lang.String)`, `UrlBasedViewResolver.setRequestContextAttribute(java.lang.String)`, `AbstractTemplateViewResolver.setExposeSpringMacroHelpers(boolean)`, `setDateToolAttribute(java.lang.String)`, `setNumberToolAttribute(java.lang.String)`, `VelocityView`

- - ### Field Summary

    - ### Fields inherited from class org.springframework.web.servlet.view.UrlBasedViewResolver

      `FORWARD_URL_PREFIX, REDIRECT_URL_PREFIX`

    - ### Fields inherited from class org.springframework.web.servlet.view.AbstractCachingViewResolver

      `DEFAULT_CACHE_LIMIT`

    - ### Fields inherited from class org.springframework.context.support.ApplicationObjectSupport

      `logger`

    - ### Fields inherited from interface org.springframework.core.Ordered

      `HIGHEST_PRECEDENCE, LOWEST_PRECEDENCE`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `VelocityViewResolver()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected AbstractUrlBasedView` | `buildView(String viewName)` Creates a new View instance of the specified view class and configures it.
    `protected void` | `initApplicationContext()` Subclasses can override this for custom initialization behavior.
    `protected Class` | `requiredViewClass()` Requires `VelocityView`.
    `void` | `setDateToolAttribute(String dateToolAttribute)` Set the name of the DateTool helper object to expose in the Velocity context of this view, or `null` if not needed.
    `void` | `setNumberToolAttribute(String numberToolAttribute)` Set the name of the NumberTool helper object to expose in the Velocity context of this view, or `null` if not needed.
    `void` | `setToolboxConfigLocation(String toolboxConfigLocation)` Set a Velocity Toolbox config location, for example "/WEB-INF/toolbox.xml", to automatically load a Velocity Tools toolbox definition file and expose all defined tools in the specified scopes.

    - ### Methods inherited from class org.springframework.web.servlet.view.AbstractTemplateViewResolver

      `setAllowRequestOverride, setAllowSessionOverride, setExposeRequestAttributes, setExposeSessionAttributes, setExposeSpringMacroHelpers`

    - ### Methods inherited from class org.springframework.web.servlet.view.UrlBasedViewResolver

      `canHandle, createView, getAttributesMap, getCacheKey, getContentType, getOrder, getPrefix, getRequestContextAttribute, getSuffix, getViewClass, getViewNames, isRedirectContextRelative, isRedirectHttp10Compatible, loadView, setAttributes, setAttributesMap, setContentType, setExposePathVariables, setOrder, setPrefix, setRedirectContextRelative, setRedirectHttp10Compatible, setRequestContextAttribute, setSuffix, setViewClass, setViewNames`

    - ### Methods inherited from class org.springframework.web.servlet.view.AbstractCachingViewResolver

      `clearCache, getCacheLimit, isCache, isCacheUnresolved, removeFromCache, resolveViewName, setCache, setCacheLimit, setCacheUnresolved`

    - ### Methods inherited from class org.springframework.web.context.support.WebApplicationObjectSupport

      `getServletContext, getTempDir, getWebApplicationContext, initApplicationContext, initServletContext, isContextRequired, setServletContext`

    - ### Methods inherited from class org.springframework.context.support.ApplicationObjectSupport

      `getApplicationContext, getMessageSourceAccessor, requiredContextClass, setApplicationContext`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### VelocityViewResolver

          public VelocityViewResolver()

  - ### Method Detail

    - #### requiredViewClass

          protected Class requiredViewClass()

      Requires `VelocityView`.
      Overrides:
        `requiredViewClass` in class `AbstractTemplateViewResolver`
      See Also:
        `AbstractUrlBasedView`

    - #### setDateToolAttribute

          public void setDateToolAttribute(String dateToolAttribute)

      Set the name of the DateTool helper object to expose in the Velocity context of this view, or `null` if not needed. DateTool is part of Velocity Tools 1.0.
      See Also:
        `DateTool`, `VelocityView.setDateToolAttribute(java.lang.String)`

    - #### setNumberToolAttribute

          public void setNumberToolAttribute(String numberToolAttribute)

      Set the name of the NumberTool helper object to expose in the Velocity context of this view, or `null` if not needed. NumberTool is part of Velocity Tools 1.1.
      See Also:
        `NumberTool`, `VelocityView.setNumberToolAttribute(java.lang.String)`

    - #### setToolboxConfigLocation

          public void setToolboxConfigLocation(String toolboxConfigLocation)

      Set a Velocity Toolbox config location, for example "/WEB-INF/toolbox.xml", to automatically load a Velocity Tools toolbox definition file and expose all defined tools in the specified scopes. If no config location is specified, no toolbox will be loaded and exposed.

      The specfied location string needs to refer to a ServletContext resource, as expected by ServletToolboxManager which is part of the view package of Velocity Tools.

      Note: Specifying a toolbox config location will lead to VelocityToolboxView instances being created.

      See Also:
        `ServletToolboxManager.getInstance(javax.servlet.ServletContext, java.lang.String)`, `VelocityToolboxView.setToolboxConfigLocation(java.lang.String)`

    - #### initApplicationContext

          protected void initApplicationContext()

      Description copied from class: `ApplicationObjectSupport`
      Subclasses can override this for custom initialization behavior.

      The default implementation is empty. Called by `ApplicationObjectSupport.initApplicationContext(org.springframework.context.ApplicationContext)`.

      Overrides:
        `initApplicationContext` in class `UrlBasedViewResolver`
      See Also:
        `ApplicationObjectSupport.setApplicationContext(org.springframework.context.ApplicationContext)`

    - #### buildView

          protected AbstractUrlBasedView buildView(String viewName)
                                            throws Exception

      Description copied from class: `UrlBasedViewResolver`
      Creates a new View instance of the specified view class and configures it. Does not perform any lookup for pre-defined View instances.

      Spring lifecycle methods as defined by the bean container do not have to be called here; those will be applied by the `loadView` method after this method returns.

      Subclasses will typically call `super.buildView(viewName)` first, before setting further properties themselves. `loadView` will then apply Spring lifecycle methods at the end of this process.

      Overrides:
        `buildView` in class `AbstractTemplateViewResolver`
      Parameters:
        `viewName` - the name of the view to build
      Returns:
        the View instance
      Throws:
        `Exception` - if the view couldn't be resolved
      See Also:
        `UrlBasedViewResolver.loadView(String, java.util.Locale)`