JAVA 認證心得 -- SCWCD 1.4 (3)

• SKIP_BODY EVAL_BODY_INCLUDE

##CONTINUE##

• SKIP_PAGE EVAL_PAGE
• String username = (String) request.getSession().getAttribute(“ttt”);
• ＜%@page isTreadSafe=”false”%＞
• the three type of JSP directive type are include , taglib , page
• In JSP , the default import list is

  java.lang.*

  java.servlet.http.*

  java.servlet.*

  java.servlet.jsp.*

• login-config (auth-method?,realm-name?,form-login-config?)
• servlet-mapping(servlet-name,url-pattern)
• setContentType() belong to ServletResponse
• res.sendRedirect(“dd”); req.getParameter(“dd”)
• ServletContext interface and GenericServlet class provide log method
• ServletOutputStream out = response.getOutputStream()

  OutputStream out = response.getOutputStream()

• GenericServlet is abstract class , so must implement service(req,res)
• getIntHeader(“xxx”) of HttpServletRequest
• all the sub element of ＜web-app＞ are optional
• HttpSessionActivationListener === session migrated

  HttpSessionAttributeListener === notify whether add remove replace method attributes in HttpSession objects

• Notified change attr in ServletContext. Must implement ServletContextAttributeListener

• HttpServletResponse setStatus(int c) sendError(int c)
• This.getServletContext().log() log()
• Notify objects add remove form session must implement HttpSessionBindingListener interface
• HttpSessionListener notify a session is created or destroyed

  sessionCreated(HttpSessionEvent se)

  sessionDestroyed(HttpSessionEvent se)