Servlet Notes for OCEJWCD 6 Exam

  • Posted on: 4 August 2013
  • By: Zhijun Chen

Here are the main notes for Servlet part of Oracle Certified Expert, Java EE 6 Web Component Developer Exam.

javax.servlet.Servlet (Interface)

  • void init(ServletConfig)
  • void init()
  • void destroy()
  • void service(ServletRequest, ServletResponse)

 javax.servlet.GenericServlet (Class implements Servlet)

  • ServletConfig getServletConfig()
  • ServletContext getServletContext() [== getServletConfig().getServletContext()]
  • String getInitParameter(String name) [== getServletConfig().getInitParameter(String name)]
  • Enumeration getInitParameterNames() [== getServletConfig().getInitParameterNames()]
  • String getServletName() [== getServletConfig().getServletName()]

javax.servlet,http.HttpServlet (Class extends GenericServlet)

  • protected void service(HttpServletRequest, HttpServletResponse)
  • protected void doXxx(HttpServletRequest, HttpServletResponse) throws ServletException, IOException (doPost, doGet, doHead, doPut, doDelete, doTrace, doOptions)

javax.servlet.ServletContext (Interface)

  • Object getAttribute(String name)
  • Enumeration getAttributeNames()
  • void removeAttribute(String name)
  • void setAttribute(String name, Object value)
  • String getServletContextName()
  • String getRealPath(String path)
  • Set getResourcePaths(Sting path)
  • ServletContext getContext(String appUrl)
  • java.net.URL getResource(String path)
  • java.io.Inputstream getResourceAsStream(String path)
  • String getMimeType(String path)
  • RequestDispatcher getRequestDispatcher(String path)
  • RequestDispatcher getNamedDispatcher(String name)
  • String getInitParameter(String name)
  • Enumeration getInitParameterNames()
  • ServletRegistration.Dynamic addServlet(String name, String servletClass)
  • FilterRegistration.Dynamic addFilter(String name, String filterClass)
  • ServletRegistration.Dynamic addServlet(String name, Class<? extends Servlet> servletClass)
  • FilterRegistration.Dynamic addFilter(String name, Class<? extends Filter> filterClass)
  • <T extends Servlet> T createServlet(Class<T> servletClass)
  • <T extends Filter> T createFilter(Class<T> filterClass)
  • ServletRegistration.Dynamic addServlet(String name, Servlet s)
  • FilterRegistration.Dynamic addFilter(String name, Filter filter)
  • void addListener(Class<? extends java.util.EventListener> listenerImplementationClass)
  • void addListener(String listenerImplementationClassName)
  • FilterRegistration getFilterRegistration(String filterName)
  • Map<String, ? extends FilterRegistration> getFilterRegistrations()
  • ServletRegistration getServletRegistration(String servletName)
  • Map<String, ? extends ServletRegistration> getServletRegistrations()
  • boolean setInitParameters(String name, String value)
  • void declareRoles(String… roleNames)
  • JspConfigDescriptor getJspConfigDescriptor()
  • SessionCookieConfig getSessionCookieConfig()
  • Set<SessionTrackingMode> getDefaultSessionTrackingModes()
  • Set<SessionTrackingMode> getEffectiveSessionTrackingModes()
  • void setSessionTrackingModes(Set<SessionTrackingMode> modes)
  • int getEffectiveMajorVersion()
  • int getEffectiveMinorVersion()
  • int getMajorVersion()
  • int getMinorVersion()
  • String getServerInfo()

Note: SessionTrackingMode includes COOKIE, URL, SSL.

javax.servlet.Registration (Inteface)

  • String getClassName()
  • String getName()
  • String getInitParameter(String name)
  • Map<String, String> getInitParameters()
  • boolean setInitParameter(String name, String value)
  • Set<String> setInitParameters(Map<String, String> initParams)

javax.servlet.Registration.Dynamic (Interface extends Registration)

  • void setAsyncSupported(boolean isAsyncSupported)

javax.servlet.ServletRegistration (Interface extends Registration)

  • Set<String> addMapping(String… urlPatterns)
  • Collection<String> getMappings()
  • String getRunAsRole()

javax.servlet.FilterRegistration (Interface extends Registration)

  • void addMappingForServletNames(EnumSet<DispatcherType> dispatcherTypes, boolean isMatchAfter, String… servletNames)
  • void addMappingForUrlPatterns(EnumSet<DispatcherType> dispatcherTypes, boolean isMatchAfter, String… urlPatterns)
  • Collection<String> getServletNameMappings()
  • Collection<String> getUrlPatternMappings()

javax.servlet.FilterRegistration.Dynamic (Interface extends FilterRegistration and Registration.Dynamic) [No additional methods]

javax.servlet.ServletRegistration.Dynamic (Interface extends ServletRegistration and Registration.Dynamic)

  • void setLoadOnStartup(int loadOnStartup)
  • void setRunAsRole(String roleName)
  • void setMultipartConfig(MultipartConfigElement multipartConfig)
  • Set<String> setServletSecurity(ServletSecurityElement constraint)

javax.servlet.ServletConfig (Interface)

  • String getServletName()
  • ServletContext getServletContext()
  • String getInitParameter(String name)
  • Enumeration getInitParameterNames()

javax.servlet.ServletContextListener (Interface)

  • void contextInitialized(ServletContextEvent event)
  • void contextDestroyed(ServletContextEvent event)

javax.servlet.ServletContextEvent (Class)

  • ServletContext getServletContext()

javax.servlet.ServletContextAttributeListener (Interface)

  • void attributeAdded(ServletContextAttributeEvent event)
  • void attributeRemoved(ServletContextAttributeEvent event)
  • void attributeReplaced(ServletContextAttributeEvent event)

javax.servlet.ServletContextAttributeEvent (Class extends ServletContextEvent)

  • ServletContext getServletContext()
  • String getName()
  • Object getValue()

javax.servlet.ServletRequest (Interface)

  • Object getAttribute(String name)
  • Enumeration getAttributeNames()
  • void removeAttribute(String name)
  • void setAttribute(String name, Object value)
  • String[] getParameterValues(String name)
  • String getParameter(String name)
  • Enumeration getParameterNames()
  • Map getParameterMap()
  • ServletInputStream getInputStream()
  • Reader getReader()
  • RequestDispatcher getRequestDispatcher(String path)
  • boolean isAsyncSupported()
  • boolean isAsyncStarted()
  • AsyncContext startAsync(ServletRequest, ServletResponse)
  • AsyncContext startAsync()
  • AsyncContext getAsyncContext()

javax.servlet.http.HttpServletRequest (Interface extends ServletRequest)

  • Enumeration getHeaders(String name)
  • String getHeader(String name)
  • int getIntHeader(String name)
  • long getDateHeader(String name)
  • String getAuthType()
  • String getRemoteUser()
  • Principal getUserPrincipal()
  • boolean isUserInRole(String role)
  • Cookie[] getCookies()
  • String getRequestedSessionId()
  • HttpSession getSession()
  • HttpSession getSession(boolean create)
  • boolean isRequestedSessionIdFromCookie()
  • boolean isRequestedSessionIdFromURL()
  • boolean isRequestedSessionIdValid()
  • Collection<Part> getParts()
  • Part getPart(String name)

javax.servlet.http.Part (Interface)[a part or form item that was received within a multipart/form-data POST request]

  • String getName()
  • long getSize()
  • String getContentType()
  • String getHeader(String name)
  • Collection<String> getHeaders(String name)
  • Collection<String> getHeaderNames()
  • InputStream getInputStream()
  • void write(String path)
  • void delete()

javax.servlet.ServletResponse (Interface)

  • ServletOutputStream getOutputStream()
  • PrintWriter getWriter()
  • void flushBuffer()
  • int getBufferSize()
  • boolean isCommitted()
  • void reset()
  • void resetBuffer()
  • void setBufferSize(int size)
  • void setCharacterEncoding(String enc)
  • String getCharacterEncoding()
  • void setContentType(String type)
  • String getContentType()
  • void setLocale(Locale locale)
  • Locale getLocale()
  • void setContentLength(int size)

javax.servlet.http.HttpServletResponse (Interface extends ServletResponse)

  • void addHeader(String name, String value)
  • void setHeader(String name, String value)
  • boolean containsHeader(String name)
  • void addIntHeader(String name, int value)
  • void setIntHeader(String name, int value)
  • void addDateHeader(String name, int value)
  • void setDateHeader(String name, int value)
  • void setStatus(int status)
  • void sendError(int code)
  • void sendError(int code, String message)
  • void sendRedirect(String path)
  • String encodeURL(String url)
  • String encodeRedirectURL(String url)
  • void addCookie(Cookie cookie)

javax.servlet.ServletRequestListener (Interface)

  • void requestInitialized(ServletRequestEvent event)
  • void requestDestroyed(ServletRequestEvent event)

javax.servlet.ServletRequestEvent (Class)

  • ServletContext getServletContext()
  • ServletRequest getServletRequest()

javax.servlet.ServletRequestAttributeListener (Interface)

  • void attributeAdded(ServletRequestAttributeEvent event)
  • void attributeRemoved(ServletRequestAttributeEvent event)
  • void attributeReplaced(ServletRequestAttributeEvent event)

javax.servlet.ServletRequestAttributeEvent (Class extends ServletRequestEvent)

  • String getName()
  • Object getValue()

javax.servlet.RequestDispatcher (Interface)

  • void forward(ServletRequest req, ServletResponse resp)
  • void include(ServletRequest req, ServletResponse resp)

javax.servlet.ServletRequestWrapper (Class implements ServletRequest)

  • public ServletRequestWrapper(ServletRequest encapsulatedReq)
  • ServletRequest getRequest()
  • void setRequest(ServletRequest encapsulatedReq)

javax.servlet.http.HttpServletRequestWrapper (Class extends ServletRequestWrapper implements HttpServletRequest)

public HttpServletRequestWrapper(HttpServletRequest wrappedReq)

 

javax.servlet.ServletResponseWrapper (Class implements ServletResponse)

  • public ServletResponseWrapper(ServletResponse encapsulatedResp)
  • ServletResponse getResponse()
  • void setResponse(ServletResponse encapsulatedResp)

javax.servlet.http.HttpServletResponseWrapper (Class extends ServletResponseWrapper implements HttpServletResponse)

  • public HttpServletResponseWrapper(HttpServletResponse wrappedResp)

javax.servlet.Filter (Interface)

  • void init(FilterConfig)
  • void destroy()
  • void doFilter(ServletRequest, ServletResponse, FilterChain)

javax.servlet.FilterChain (Interface)

  • void doFilter(ServletRequest, ServletResponse)

javax.servlet.FilterConfig (Interface)

  • ServletContext getServletContext()
  • String getInitParameter(String name)
  • Enumeration getInitParameterNames()
  • String getFilterName()

javax.servlet.AsyncContext (Interface)

  • ServletRequest getRequest()
  • ServletResponse getResponse()
  • boolean hasOriginalRequestAndResponse()
  • void setTimeout(long milliseconds) [<=0 to disable]
  • long getTimeout()
  • void start(Runnable task)
  • void dispatch(String path)
  • void dispatch(ServletContext context, String path)
  • void dispatch()
  • void complete()
  • <T extends AyncListener> T createListener(Class<T> clazz)
  • void addListener(AsyncListener l)
  • void addListener(AsyncLisnter l, ServletRequest request, ServletResponse response)

javax.servlet.AsyncListener (Interface)

  • void onStartAsync(AsyncEvent event)
  • void onComplete(AsyncEvent event)
  • void onTimout(AsyncEvent event)
  • void onError(AsyncEvent event)

javax.servlet.AsyncEvent (Class)

  • AsyncContext getAsyncContext()
  • Throwable getThrowable()
  • SerlvetRequest getSuppliedRequest()
  • ServletResponse getSuppliedResponse()

javax.servlet.http.HttpSession (Interface)

  • Object getAttribute(String name)
  • Enumeration getAttributeNames()
  • void setAttribute(String name, Object value)
  • void removeAttribute(String name)
  • long getCreationTime()
  • String getId()
  • long getLastAccessedTime()
  • int getMaxInactiveInterval()
  • void invalidate()
  • boolean isNew()
  • void setMaxInactiveInterval(int timeoutSeconds) [0 times out at the end of req-res cycle, <0 never time out]
  • ServletContext getServletContext()

javax.servlet.http.HttpSessionListener (Interface)

  • void sessionCreated(HttpSessionEvent event)
  • void sessionDestroyed(HttpSessionEvent event)

javax.servlet.http.HttpSessionEvent (Class)

  • HttpSession getSession()

javax.servlet.http.HttpSessionActivationListener (Interface)

  • void sessionDidActivate(HttpSessionEvent event)
  • void sessionWillPassivate(HttpSessionEvent event)

javax.servlet.http.HttpSessionAttributeListener (Interface)

  • void attributeAdded(HttpSessionBindingEvent event)
  • void attributeRemoved(HttpSessionBindingEvent event)
  • void attributeReplaced(HttpSessionBindingEvent event)

javax.servlet.http.HttpSessionBindingEvent (Class extends HttpSessionEvent)

  • String getName()
  • Object getValue()

javax.servlet.http.HttpSessionBindingListener (Interface) [Implemented by classes bound into sessions as attributes]

  • void valueBound(HttpSessionBindingEvent event)
  • void valueUnbound(HttpSessionBindingEvent event)

javax.servlet.annotation.@WebServlet(

       boolean asyncSupported = false,

       String description = “”,

       String displayName = “”,

       String largeIcon = “”,

       String smallIcon = “”,

       int loadOnStartup = -1,

       String name = “”,

       String[] urlPatterns = {},

       String[] value = {},

       @WebInitParam[] initParams = {}

)

Note: value is the default element if no others are supplied, the same role as urlPatterns. (value XOR urlPatterns). If name is omitted, full qualified class name will apply

 

javax.servlet.annotation.@WebInitParam(

       String name,

       String value,

       String description = “”

)

 

javax.servlet.annotation.@MultiPartConfig(

       int fileSizeThreshold = 0,

long maxFileSize = -1L,

long maxRequestSize = -1L,

String location = “”

)

 

javax.servlet.annotation.@WebFilter(

       boolean asyncSupported = false,

       String description = “”,

String displayName = “”,

       String largeIcon = “”,

       String smallIcon = “”,

       String filterName = “”,

       String[] urlPatterns = {},

       String[] value = {},

       @WebInitParam[] initParams = {},

       String[] servletNames = {},

       DispatcherType[] dispatcherTypes = {DispatcherType.REQUEST}

)

Note: DispatcherType includes ASYNC, ERROR, FORWARD, INCLUDE, REQUEST

 

javax.servlet.annotation.@WebListener(

       value = “”

)

Note: value is the description of the listener

 

javax.annotation.@Resource(

       String description = “”,

       String name = “”,

       String mappedName = “”,

       Class type = Object.class,

       Resource.AuthenticationType authentication = CONTAINER,

       boolean shareable = true

)

Note: name is the JNDI name of the resource, appended to java:comp/env/; AuthenticationType includes CONTAINER, APPLICATION

 

javax.annotation.@PreDestroy, javax.annotation.@PostConstruct [used to annotate methods which run before an injection is removed or after a resource is injected.]

 

javax.ejb.@EJB(

       String description = “”,

       Class beanInterface = Object.class,

       String name = “”,

       String beanName = “”,

       String mappedName = “”,

       String lookup = “”

)

 

javax.persistence.@PersistenceUnit(

       String name = “”,

       String unitName = “”

)

Note: Expresses a dependency on an EntityManagerFactory and its associated persistence unit.

 

javax.persistence.@PersistenceContext(

       String name = “”,

       String unitName = “”

)

Note: Expresses a dependency on a container-managed EntityManager and its associated persistence context.

 

javax.servlet.annotation.@ServletSecurity(

       HttpConstraint value,

       HttpMethodConstraint[] httpMethodConstraints = {};

)

 

javax.servlet.annotation.@HttpMethodConstraint(

       String value, // required: the HTTP method name

       String[] rolesAllowed = {},

ServletSecurity.TransportGuarantee transportGuarantee = NONE | CONFIDENCIAL,

ServletSecurity.EmptyRoleSemantic emptyRoleSemantic = PERMIT | DENY;

)

 

javax.servlet.annotation.@HttpConstraint(

       String[] rolesAllowed = {},

ServletSecurity.TransportGuarantee transportGuarantee = NONE | CONFIDENCIAL,

ServletSecurity.EmptyRoleSemantic emptyRoleSemantic = PERMIT | DENY;

)

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