By Alain Trottier
This certification is for sunlight qualified Programmers for Java 2 Platform who're utilizing servlet and JavaServer Pages (JSP) APIs to advance net purposes utilizing the Java 2 Platform, company version (J2EE). The certification contains one examination and calls for sunlight qualified Programmer for Java 2 Platform prestige. This booklet isn't really meant to coach new fabric. as an alternative it assumes that you've a fantastic starting place of information yet can use a refresher on vital suggestions in addition to a advisor to examination themes and ambitions. This booklet focuses precisely on what you want to cross the examination - it beneficial properties test-taking options, time-saving examine guidance, and a unique Cram Sheet that incorporates suggestions, acronyms, and reminiscence joggers now not to be had at any place else. The sequence is supported on-line at numerous websites: examcram.com, informit.com, and cramsession.com.
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Additional info for Java 2 Enterprise Edition (J2EE) Web Component Developer Exam Cram 2 (Exam Cram 310-080)
Servlet . . Methods . . and . Life . Cycle . . ➤ getContext(String uripath)—Returns a ServletContext object that corresponds to a specified URL on the server ➤ getInitParameter(String name)—Returns a string containing the value of the named context-wide initialization parameter, or null if the parameter does not exist ➤ getInitParameterNames()—Returns the names of the context’s initializa- tion parameters as an Enumeration of string objects, or an empty Enumeration if the context has no initialization parameters ➤ getNamedDispatcher(String name)—Returns a RequestDispatcher ob- ject that acts as a wrapper for the named servlet ➤ getRequestDispatcher(String path)—Returns a RequestDispatcher ob- ject that acts as a wrapper for the resource located at the given path Servlet Life Cycle A few guaranteed exam questions will be on the life-cycle methods init, service, and destroy.
15 16 Chapter . . 1. . . . . . . . . . . . . . . . . . . . . . Session A session is made up of multiple hits from the same browser across some period of time. The session scope includes all hits from a single machine (multiple browser windows, if they share cookies). Servlets maintain state with sessions. The following code snippet demonstrates how you can use session attributes. println(name + “ = “ + value + “
”); } To summarize, you can use sessions to track a single user over a short time.
3. security-role. , role-name)> . . . . . . . . . . . . . . . . . Deploying . . . Web . Applications . . . . The order of elements is important. If you place these elements in the wrong order, the container will choke. More to the point, the exam expects you to know the order. 1 is a deployment descriptor example. TesterException
Java 2 Enterprise Edition (J2EE) Web Component Developer Exam Cram 2 (Exam Cram 310-080) by Alain Trottier