类 WebRequestHandlerInterceptorAdapter

构造器详细资料

• WebRequestHandlerInterceptorAdapter

  public WebRequestHandlerInterceptorAdapter​(WebRequestInterceptor requestInterceptor)

  Create a new WebRequestHandlerInterceptorAdapter for the given WebRequestInterceptor.

  参数:

  requestInterceptor - the WebRequestInterceptor to wrap

方法详细资料

• preHandle

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

  从接口复制的说明: HandlerInterceptor
  Intercept the execution of a handler. Called after HandlerMapping determined an appropriate handler object, but before HandlerAdapter invokes the handler.

  DispatcherServlet processes a handler in an execution chain, consisting of any number of interceptors, with the handler itself at the end. With this method, each interceptor can decide to abort the execution chain, typically sending a HTTP error or writing a custom response.

  Note: special considerations apply for asynchronous request processing. For more details see AsyncHandlerInterceptor.

  指定者:

  preHandle 在接口中 HandlerInterceptor

  参数:

  request - current HTTP request

  response - current HTTP response

  handler - chosen handler to execute, for type and/or instance evaluation

  返回:

  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.

  抛出:

  Exception - in case of errors

• postHandle

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

  从接口复制的说明: HandlerInterceptor
  Intercept the execution of a handler. Called after HandlerAdapter actually invoked the handler, but before the DispatcherServlet renders the view. Can expose additional model objects to the view via the given ModelAndView.

  DispatcherServlet processes a handler in an execution chain, consisting of any number of interceptors, with the handler itself at the end. With this method, each interceptor can post-process an execution, getting applied in inverse order of the execution chain.

  Note: special considerations apply for asynchronous request processing. For more details see AsyncHandlerInterceptor.

  指定者:

  postHandle 在接口中 HandlerInterceptor

  参数:

  request - current HTTP request

  response - current HTTP response

  handler - handler (or HandlerMethod) that started asynchronous execution, for type and/or instance examination

  modelAndView - the ModelAndView that the handler returned (can also be null)

  抛出:

  Exception - in case of errors

• afterCompletion

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

  从接口复制的说明: HandlerInterceptor
  Callback after completion of request processing, that is, after rendering the view. Will be called on any outcome of handler execution, thus allows for proper resource cleanup.

  Note: Will only be called if this interceptor's preHandle method has successfully completed and returned true!

  As with the postHandle method, the method will be invoked on each interceptor in the chain in reverse order, so the first interceptor will be the last to be invoked.

  Note: special considerations apply for asynchronous request processing. For more details see AsyncHandlerInterceptor.

  指定者:

  afterCompletion 在接口中 HandlerInterceptor

  参数:

  request - current HTTP request

  response - current HTTP response

  handler - handler (or HandlerMethod) that started asynchronous execution, for type and/or instance examination

  ex - exception thrown on handler execution, if any

  抛出:

  Exception - in case of errors

• afterConcurrentHandlingStarted

  public void afterConcurrentHandlingStarted​(HttpServletRequest request,
                                             HttpServletResponse response,
                                             Object handler)

  从接口复制的说明: AsyncHandlerInterceptor
  Called instead of postHandle and afterCompletion, when the a handler is being executed concurrently.

  Implementations may use the provided request and response but should avoid modifying them in ways that would conflict with the concurrent execution of the handler. A typical use of this method would be to clean up thread-local variables.

  指定者:

  afterConcurrentHandlingStarted 在接口中 AsyncHandlerInterceptor

  参数:

  request - the current request

  response - the current response

  handler - the handler (or HandlerMethod) that started async execution, for type and/or instance examination