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MSAJSP

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More Servlets and JavaServer Pages


Chapter 2: A Fast Introduction to Basic Servlet Programming

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Source Code from Chapter

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  • ServletTemplate.java. Basic template for packageless servlet.
  • HelloWorld.java. Simple packageless servlet that generates plain text output.
  • HelloServlet.java. Simple packageless servlet that generates HTML output.
  • HelloServlet2.java. Simple servlet that demonstrates the use of packages. Remember to put this and all remaining Chapter 2 classes in the moreservlets directory.
  • ServletUtilities.java. A utility class that simplifies the generation of the DOCTYPE and TITLE. Note: most of the remaining servlets in this chapter use this class.
  • HelloServlet3.java. A servlet that uses the ServletUtilities class. If you get "unresolved symbol" errors when compiling this servlet, review Section 1.6, especially the CLASSPATH settings on pages 19 and 20.
  • web.xml. Deployment descriptor illustrating how to set servlet initialization parameters. See Chapter 5 for specific examples of the use of various web.xml elements, including the setting of initialization parameters for both servlets and JSP pages.
  • ThreeParams.java. Simple servlet that reads three parameters from the form data.
  • ThreeParamsForm.html. Form that sends data to the three-params servlet.
  • ServletUtilities.java. Same utility class shown earlier. The point here is the filter method that replaces the special HTML characters.
  • ShowRequestHeaders.java. Servlet that shows all the request headers sent in the current request.
  • SearchEngines.java. Servlet that takes a search string, number of results per page, and a search engine name, sending the query to that search engine. Illustrates manipulating response status codes. Requires the SearchSpec and ServletUtilities classes.
  • SearchSpec.java. Small class that encapsulates how to construct a search string for a particular search engine.
  • SearchEngines.html. Form that collects data for the search engine servlet.
  • SetCookies.java. Servlet that sets six cookies: three that apply only to the current session (regardless of how long that session lasts) and three that persist for an hour (regardless of whether the browser is restarted).
  • ShowCookies.java. Servlet that creates a table of the cookies associated with the current page.
  • ServletUtilities.java. Same utility class shown earlier. The point here is the getCookieValue and getCookie methods.
  • LongLivedCookie.java. Cookie that persists 1 year. Default cookie doesn't persist past current session.
  • ShowSession.java. Simple example of session tracking.
  • ShowItems.java. Servlet that displays a list of items being ordered. Accumulates them in an ArrayList with no attempt at detecting repeated items. Used to demonstrate basic session tracking.
  • OrderForm.html. HTML form that collects values of the newItem parameter and submits them to the ShowItems servlet.

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