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

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org.springframework.web.servlet.handler
Class HandlerInterceptorAdapter

java.lang.Object
  org.springframework.web.servlet.handler.HandlerInterceptorAdapter

All Implemented Interfaces:: HandlerInterceptor

Direct Known Subclasses:: LocaleChangeInterceptor, ThemeChangeInterceptor, UserRoleAuthorizationInterceptor

public abstract class HandlerInterceptorAdapter
extends Object
implements HandlerInterceptor
extends Object
implements HandlerInterceptor

Abstract adapter class for the HandlerInterceptor interface, for simplified implementation of pre-only/post-only interceptors.

Since:: 05.12.2003
Author:: Juergen Hoeller

Constructor Summary

HandlerInterceptorAdapter()


Method Summary

void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
          This implementation is empty.

void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView)
          This implementation is empty.

boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
          This implementation always returns true.

Methods inherited from class java.lang.Object

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

Constructor Summary
`HandlerInterceptorAdapter()`

Method Summary
`void`	`afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)` This implementation is empty.
`void`	`postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView)` This implementation is empty.
`boolean`	`preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)` This implementation always returns `true`.

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

Constructor Detail

HandlerInterceptorAdapter

public HandlerInterceptorAdapter()

Method Detail

preHandle

public boolean preHandle(HttpServletRequest request,
                         HttpServletResponse response,
                         Object handler)
                  throws Exception

This implementation always returns true.

Specified by:: preHandle in interface HandlerInterceptor

Parameters:: request - current HTTP request; response - current HTTP response; handler - chosen handler to execute, for type and/or instance evaluation
Returns:: true if the execution chain should proceed with the next interceptor or the handler itself. Else, DispatcherServlet assumes that this interceptor has already dealt with the response itself.
Throws:: Exception - in case of errors

postHandle

public void postHandle(HttpServletRequest request,
                       HttpServletResponse response,
                       Object handler,
                       ModelAndView modelAndView)
                throws Exception

This implementation is empty.

Specified by:: postHandle in interface HandlerInterceptor

Parameters:: request - current HTTP request; response - current HTTP response; handler - chosen handler to execute, for type and/or instance examination; modelAndView - the ModelAndView that the handler returned (can also be null)
Throws:: Exception - in case of errors

afterCompletion

public void afterCompletion(HttpServletRequest request,
                            HttpServletResponse response,
                            Object handler,
                            Exception ex)
                     throws Exception