类 AbstractController

构造器详细资料

• AbstractController

  public AbstractController()

  Create a new AbstractController which supports HTTP methods GET, HEAD and POST by default.

• AbstractController

  public AbstractController​(boolean restrictDefaultSupportedMethods)

  Create a new AbstractController.

  参数:

  restrictDefaultSupportedMethods - true if this controller should support HTTP methods GET, HEAD and POST by default, or false if it should be unrestricted

  从以下版本开始:

  4.3

方法详细资料

• setSynchronizeOnSession

  public final void setSynchronizeOnSession​(boolean synchronizeOnSession)

  Set if controller execution should be synchronized on the session, to serialize parallel invocations from the same client.

  More specifically, the execution of the handleRequestInternal method will get synchronized if this flag is "true". The best available session mutex will be used for the synchronization; ideally, this will be a mutex exposed by HttpSessionMutexListener.

  The session mutex is guaranteed to be the same object during the entire lifetime of the session, available under the key defined by the SESSION_MUTEX_ATTRIBUTE constant. It serves as a safe reference to synchronize on for locking on the current session.

  In many cases, the HttpSession reference itself is a safe mutex as well, since it will always be the same object reference for the same active logical session. However, this is not guaranteed across different servlet containers; the only 100% safe way is a session mutex.

  另请参阅:

  handleRequestInternal(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse), HttpSessionMutexListener, WebUtils.getSessionMutex(javax.servlet.http.HttpSession)

• isSynchronizeOnSession

  public final boolean isSynchronizeOnSession()

  Return whether controller execution should be synchronized on the session.

• handleRequest

  @Nullable
  public ModelAndView handleRequest​(HttpServletRequest request,
                                    HttpServletResponse response)
                             throws Exception

  从接口复制的说明: Controller
  Process the request and return a ModelAndView object which the DispatcherServlet will render. A null return value is not an error: it indicates that this object completed request processing itself and that there is therefore no ModelAndView to render.

  指定者:

  handleRequest 在接口中 Controller

  参数:

  request - current HTTP request

  response - current HTTP response

  返回:

  a ModelAndView to render, or null if handled directly

  抛出:

  Exception - in case of errors

• handleRequestInternal

  @Nullable
  protected abstract ModelAndView handleRequestInternal​(HttpServletRequest request,
                                                        HttpServletResponse response)
                                                 throws Exception

  Template method. Subclasses must implement this. The contract is the same as for handleRequest.

  抛出:

  Exception

  另请参阅:

  handleRequest(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)