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HttpRequestHandlerAdapter (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.web.servlet.mvc
Class HttpRequestHandlerAdapter

java.lang.Object
  org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter

All Implemented Interfaces:

HandlerAdapter

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public class HttpRequestHandlerAdapter
extends Object
implements HandlerAdapter

Adapter to use the plain HttpRequestHandler interface with the generic DispatcherServlet. Supports handlers that implement the LastModified interface.

This is an SPI class, not used directly by application code.

Since:

2.0

Author:

Juergen Hoeller

See Also:

DispatcherServlet, HttpRequestHandler, LastModified, SimpleControllerHandlerAdapter

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Constructor Summary
HttpRequestHandlerAdapter()

 

Method Summary
long	getLastModified(HttpServletRequest request, Object handler)           Same contract as for HttpServlet's getLastModified method.
ModelAndView	handle(HttpServletRequest request, HttpServletResponse response, Object handler)           Use the given handler to handle this request.
boolean	supports(Object handler)           Given a handler instance, return whether or not this HandlerAdapter can support it.

 

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

 

Constructor Detail

HttpRequestHandlerAdapter

public HttpRequestHandlerAdapter()

Method Detail

supports

public boolean supports(Object handler)

Description copied from interface: HandlerAdapter

Given a handler instance, return whether or not this HandlerAdapter can 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:

supports in interface HandlerAdapter

Parameters:

handler - handler object to check

Returns:

whether or not this object can use the given handler

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handle

public ModelAndView handle(HttpServletRequest request,
                           HttpServletResponse response,
                           Object handler)
                    throws Exception

Description copied from interface: HandlerAdapter

Use the given handler to handle this request. The workflow that is required may vary widely.

Specified by:

handle in interface HandlerAdapter

Parameters:

request - current HTTP request

response - current HTTP response

handler - handler to use. This object must have previously been passed to the supports method of this interface, which must have returned true.

Returns:

ModelAndView object with the name of the view and the required model data, or null if the request has been handled directly

Throws:

Exception - in case of errors

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getLastModified

public long getLastModified(HttpServletRequest request,
                            Object handler)

Description copied from interface: HandlerAdapter

Same contract as for HttpServlet's getLastModified method. Can simply return -1 if there's no support in the handler class.

Specified by:

getLastModified in interface HandlerAdapter

Parameters:

request - current HTTP request

handler - 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)

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