Class SimpleServletHandlerAdapter
- java.lang.Object
- org.springframework.web.servlet.handler.SimpleServletHandlerAdapter
- All Implemented Interfaces:
HandlerAdapter
public class SimpleServletHandlerAdapter extends Object implements HandlerAdapter
Adapter to use the Servlet interface with the generic DispatcherServlet. Calls the Servlet'sservicemethod to handle a request.Last-modified checking is not explicitly supported: This is typically handled by the Servlet implementation itself (usually deriving from the HttpServlet base class).
This adapter is not activated by default; it needs to be defined as a bean in the DispatcherServlet context. It will automatically apply to mapped handler beans that implement the Servlet interface then.
Note that Servlet instances defined as bean will not receive initialization and destruction callbacks, unless a special post-processor such as SimpleServletPostProcessor is defined in the DispatcherServlet context.
Alternatively, consider wrapping a Servlet with Spring's ServletWrappingController. This is particularly appropriate for existing Servlet classes, allowing to specify Servlet initialization parameters etc.
- Since:
- 1.1.5
- Author:
- Juergen Hoeller
- See Also:
Servlet,HttpServlet,SimpleServletPostProcessor,ServletWrappingController
Constructor Summary
Constructors Constructor Description SimpleServletHandlerAdapter()
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description longgetLastModified(HttpServletRequest request, Object handler)Same contract as for HttpServlet'sgetLastModifiedmethod.ModelAndViewhandle(HttpServletRequest request, HttpServletResponse response, Object handler)Use the given handler to handle this request.booleansupports(Object handler)Given a handler instance, return whether or not thisHandlerAdaptercan support it.
Constructor Detail
SimpleServletHandlerAdapter
public SimpleServletHandlerAdapter()
Method Detail
supports
public boolean supports(Object handler)
Description copied from interface:HandlerAdapterGiven a handler instance, return whether or not thisHandlerAdaptercan support it. Typical HandlerAdapters will base the decision on the handler type. HandlerAdapters will usually only support one handler type each.A typical implementation:
return (handler instanceof MyHandler);- Specified by:
supportsin interfaceHandlerAdapter- Parameters:
handler- handler object to check- Returns:
- whether or not this object can use the given handler
handle
public ModelAndView handle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception
Description copied from interface:HandlerAdapterUse the given handler to handle this request. The workflow that is required may vary widely.- Specified by:
handlein interfaceHandlerAdapter- Parameters:
request- current HTTP requestresponse- current HTTP responsehandler- handler to use. This object must have previously been passed to thesupportsmethod of this interface, which must have returnedtrue.- Returns:
- ModelAndView object with the name of the view and the required model data, or
nullif the request has been handled directly - Throws:
Exception- in case of errors
getLastModified
public long getLastModified(HttpServletRequest request, Object handler)
Description copied from interface:HandlerAdapterSame contract as for HttpServlet'sgetLastModifiedmethod. Can simply return -1 if there's no support in the handler class.- Specified by:
getLastModifiedin interfaceHandlerAdapter- Parameters:
request- current HTTP requesthandler- handler to use- Returns:
- the lastModified value for the given handler
- See Also:
HttpServlet.getLastModified(javax.servlet.http.HttpServletRequest),LastModified.getLastModified(javax.servlet.http.HttpServletRequest)