## org.springframework.web.servlet
Class ViewRendererServlet

    java.lang.Object
      javax.servlet.GenericServlet
          javax.servlet.http.HttpServlet
              org.springframework.web.servlet.ViewRendererServlet

All Implemented Interfaces:
  Serializable, Servlet, ServletConfig

    public class ViewRendererServlet

extends HttpServlet

ViewRendererServlet is a bridge servlet, mainly for the Portlet MVC support.

For usage with Portlets, this Servlet is necessary to force the portlet container to convert the PortletRequest to a ServletRequest, which it has to do when including a resource via the PortletRequestDispatcher. This allows for reuse of the entire Servlet-based View support even in a Portlet environment.

The actual mapping of the bridge servlet is configurable in the DispatcherPortlet, via a "viewRendererUrl" property. The default is "/WEB-INF/servlet/view", which is just available for internal resource dispatching.

Since:
  2.0
Author:
  William G. Thompson, Jr., John A. Lewis, Juergen Hoeller
See Also:
  Serialized Form

Field Summary
`static String` `MODEL_ATTRIBUTE` Name of request attribute that holds the model Map
`static String` `VIEW_ATTRIBUTE` Name of request attribute that holds the View object
`static String` `WEB_APPLICATION_CONTEXT_ATTRIBUTE` Request attribute to hold current web application context.

Constructor Summary
`ViewRendererServlet()`

Method Summary
`protected void` `doGet(HttpServletRequest request, HttpServletResponse response)`
`protected void` `doPost(HttpServletRequest request, HttpServletResponse response)`
`protected void` `processRequest(HttpServletRequest request, HttpServletResponse response)` Process this request, handling exceptions.
`protected void` `renderView(HttpServletRequest request, HttpServletResponse response)` Retrieve the View instance and model Map to render and trigger actual rendering.

Methods inherited from class javax.servlet.http.HttpServlet
`doDelete, doHead, doOptions, doPut, doTrace, getLastModified, service, service`

Methods inherited from class javax.servlet.GenericServlet
`destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### WEB_APPLICATION_CONTEXT_ATTRIBUTE

    public static final String WEB_APPLICATION_CONTEXT_ATTRIBUTE

  Request attribute to hold current web application context. Otherwise only the global web app context is obtainable by tags etc.

  See Also:
    `RequestContextUtils.getWebApplicationContext(javax.servlet.ServletRequest)`

### VIEW_ATTRIBUTE

    public static final String VIEW_ATTRIBUTE

  Name of request attribute that holds the View object

### MODEL_ATTRIBUTE

    public static final String MODEL_ATTRIBUTE

  Name of request attribute that holds the model Map

Constructor Detail

### ViewRendererServlet

    public ViewRendererServlet()

Method Detail

### doGet

    protected final void doGet(HttpServletRequest request,
                               HttpServletResponse response)
                        throws ServletException,
                               IOException

  Overrides:
    `doGet` in class `HttpServlet`
  Throws:
    `ServletException`
    `IOException`

### doPost

    protected final void doPost(HttpServletRequest request,
                                HttpServletResponse response)
                         throws ServletException,
                                IOException

  Overrides:
    `doPost` in class `HttpServlet`
  Throws:
    `ServletException`
    `IOException`

### processRequest

    protected final void processRequest(HttpServletRequest request,
                                        HttpServletResponse response)
                                 throws ServletException,
                                        IOException

  Process this request, handling exceptions. The actually event handling is performed by the abstract `renderView()` template method.

  Throws:
    `ServletException`
    `IOException`
  See Also:
    `renderView(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)`

### renderView

    protected void renderView(HttpServletRequest request,
                              HttpServletResponse response)
                       throws Exception

  Retrieve the View instance and model Map to render and trigger actual rendering.

  Parameters:
    `request` - current HTTP request
    `response` - current HTTP response
  Throws:
    `Exception` - in case of any kind of processing failure
  See Also:
    `View.render(java.util.Map<java.lang.String, ?>, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)`