0A-Servlet+JSP-Revie.. - Custom Training Courses - Coreservlets.com

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© 2008 Marty HallJSP Scripting32Customized Java EE Training: http://courses.coreservlets.com/Servlets, JSP, Struts, JSF/MyFaces/Facelets, Ajax, GWT, Spring, Hibernate, Java 5 & 6.Developed and taught by well-known author and developer. At public venues or onsite at your location.Uses of JSP Constructs33SimpleApplicationComplexApplication• Scripting elements calling servletcode directly• Scripting elements calling servletcode indirectly (by means of utilityclasses)• Beans• Servlet/JSP combo (MVC)• MVC with JSP expression language• Custom tags• MVC with beans, custom tags, anda framework like Struts or JSFJava EE training: http://courses.coreservlets.com
34JSP Scripting Design Strategy:Limit Java Code in JSP Pages• You have two options– Put 25 lines of Java code directly in the JSP page– Put those 25 lines in a separate Java class and put 1 linein the JSP page that invokes it• Why is the second option much better?– Development. You write the separate class in a Javaenvironment (editor or IDE), not an HTML environment– Debugging. If you have syntax errors, you see themimmediately at compile time. Simple print statements canbe seen.– Testing. You can write a test routine with a loop thatdoes 10,000 tests and reapply it after each change.– Reuse. You can use the same class from multiple pages.Java EE training: http://courses.coreservlets.comJSP Expressions35• Format– • Result– Expression evaluated, converted to String, and placedinto HTML page at the place it occurred in JSP page– That is, expression placed in _jspService inside out.print• Examples– Current time: – Your hostname: • XML-compatible syntax– Java Expression– You cannot mix versions within a single page. You mustuse XML for entire page if you use jsp:expression.Java EE training: http://courses.coreservlets.com
Page 1 and 2: © 2008 Marty HallServlet and JSPRe
Page 4 and 5: A Sample Servlet (Code)package core
Page 6 and 7: Configuring Eclipse12• Make sure
Page 8 and 9: Deploying App in Eclipse• Deploy
Page 10 and 11: Defining Custom URLs: Result20• E
Page 12 and 13: An HTML Form With ThreeParameters u
Page 16 and 17: Predefined Variables36• request-
Page 18 and 19: Why Two Versions?40• Classic synt
Page 20 and 21: Sample HTML 4 Page: ClassicSyntax (
Page 22 and 23: © 2008 Marty Halljsp:include48Cust
Page 24 and 25: A News Headline Page: Result52Java
Page 26 and 27: Request-Based Sharing: Beanpackage
Page 28 and 29: Request-Based Sharing:Input Form...
Page 30: © 2008 Marty HallQuestions?64Custo

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