JAVA 認證心得 -- SCWCD 1.4 (2)

• getAuthType() method of HttpServletRequest returns name of the authenticating scheme used to protect the servlet

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• invalidate() is used to expunge or invalidate a session object

• The sendError method causes the server to generate and send an appropriate server-specific page describing the error

• UnavailableException exception indicates to the web container that the servlet is either temporarily or permanently available

• getLastModified method belongs to which HttpServlet interface
• sessionCreated and sessionDestroyed are the valid methods of HttpSessionListener
• HttpSessionActivationListener interface is designed to handle sessions that migrate from one server to another
• getInitParameterNames returns names of the context's initialization parameters as Enumeration of String objects
• ＜taglib＞

  ＜taglib-uri＞＜/taglib-uri＞

  ＜taglib-location＞＜/taglib-location＞

  ＜/taglib＞

  ＜! taglib id＞

• The getResource() and getResourceAsStream() belong to ServletContext interface
• ＜session-config＞

  ＜session-timeout＞1＜/session-timeout＞ 1 min

  ＜/session-config＞

  ＜session-timeout＞0＜/session-timeout＞ never expire