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Mini MVC Tutorial Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1/2004 User number: 747221 Copyright 2007, Safari Books Online, LLC. This PDF is exclusively for your use in accordance with the Safari Terms of Service. No part of it may be reproduced or transmitted in any form by any means without the prior written permission for reprints and excerpts from the publisher. Redistribution or other use that violates the fair use priviledge under U.S. copyright laws (see 17 USC107) or that otherwise violates the Safari Terms of Service is strictly prohibited.  FKDSWHU *]QTLQVOIVL\M[\QVO\PMUWLMTKTI[[  )N-6#THEMODELTENDSTOBETHEhBACKENDvOFTHEAPPLICATION)TSOFTENTHELEGACYSYSTEM THATSNOWBEINGEXPOSEDTOTHEWEB)NMOSTCASESITSJUSTPLAINOLD*AVACODEWITHNO KNOWLEDGEOFTHEFACTTHATITMIGHTBECALLEDBYSERVLETS4HEMODELSHOULDNTBETIEDDOWN TOBEINGUSEDBYONLYASINGLEWEBAPPSOITSHOULDBEINITSOWNUTILITYPACKAGES 7KHVSHFVIRUWKHPRGHO ,WVSDFNDJHVKRXOGEHFRPH[DPSOHPRGHO ,WVGLUHFWRU\VWUXFWXUHVKRXOGEH:(%,1)FODVVHVFRPPRGHO ,WH[SRVHVRQHPHWKRGJHW%UDQGVWKDWWDNHVDSUHIHUUHGEHHUFRORUDVD 6WULQJDQGUHWXUQVDQ$UUD\/LVWRIUHFRPPHQGHGEHHUEUDQGVDOVRDV6WULQJV %XLOGWKHWHVWFODVVIRUWKHPRGHO &UHDWHWKHWHVWFODVVIRUWKHPRGHO\HVEHIRUH\RXEXLOGWKHPRGHOLWVHOI<RX¶UHRQ \RXURZQKHUHZHGRQ¶WKDYHRQHLQWKLVWXWRULDO5HPHPEHUWKHPRGHOZLOOVWLOOEHLQWKH GHYHORSPHQWHQYLURQPHQWZKHQ\RX¿UVWWHVWLW²LW¶VMXVWOLNHDQ\RWKHU-DYDFODVVDQG \RXFDQWHVWLWZLWKRXW7RPFDW %XLOGDQGWHVWWKHPRGHO 0RGHOVFDQEHH[WUHPHO\FRPSOLFDWHG7KH\RIWHQLQYROYHFRQQHFWLRQVWROHJDF\ GDWDEDVHVDQGFDOOVWRFRPSOH[EXVLQHVVORJLF+HUH¶VRXUVRSKLVWLFDWHGUXOH EDVHGH[SHUWV\VWHPIRUWKHEHHUDGYLFH SDFNDJHFRPH[DPSOHPRGHO LPSRUWMDYDXWLO SXEOLFFODVV%HHU([SHUW^ SXEOLF/LVWJHW%UDQGV6WULQJFRORU^ /LVWEUDQGV QHZ$UUD\/LVW LIFRORUHTXDOV³DPEHU´^ EUDQGVDGG³-DFN$PEHU´ EUDQGVDGG³5HG0RRVH´ ` HOVH^ EUDQGVDGG³-DLO3DOH$OH´ EUDQGVDGG³*RXW6WRXW´ ` UHWXUQEUDQGV ` ` Notice how weÕve captured complex, expert knowledge of the beer paradigm using advanced conditional expressions. FGEHHU9 MDYDFFODVVSDWK8VHUVEHUW$SSOLFDWLRQVWRPFDWFRPPRQOLE VHUYOHWDSLMDUFODVVHVGFODVVHVVUFFRPH[DPSOHPRGHO%HHU([SHUWMDYD )LOH(GLW:LQGRZ+HOS6NDWHERDUG DonÕt forget to change this to use YOUR speciÞc path to the tomcat home. WKHPRGHOFODVV Chapter 3. Mini MVC Tutorial Chapter 3. Mini MVC Tutorial Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1/2004 User number: 747221 Copyright 2007, Safari Books Online, LLC. This PDF is exclusively for your use in accordance with the Safari Terms of Service. No part of it may be reproduced or transmitted in any form by any means without the prior written permission for reprints and excerpts from the publisher. Redistribution or other use that violates the fair use priviledge under U.S. copyright laws (see 17 USC107) or that otherwise violates the Safari Terms of Service is strictly prohibited. KDQGVRQ09& \RXDUHKHUH  -VPIVKQVO\PM[MZ^TM\\WKITT\PMUWLMT [W\PI\_MKIVOM\:-)4IL^QKM )NTHISVERSIONTWOSERVLETWELLENHANCETHEDO0OSTMETHODTO CALLTHEMODELFORADVICEVERSIONTHREEWILLMAKETHEADVICECOME FROMA*304HECODECHANGESARETRIVIALBUTTHEIMPORTANTPARTIS UNDERSTANDINGTHEREDEPLOYMENTOFTHEENHANCEDWEBAPP9OUCAN TRYTOWRITETHECODERECOMPILEANDDEPLOYONYOUROWNORYOU CANTURNTHEPAGEANDFOLLOWALONG (QKDQFHWKHVHUYOHWYHUVLRQWZR )RUJHWDERXWVHUYOHWVIRUDPLQXWHOHW·VMXVWWKLQN-DYD:KDW DUHWKHVWHSVZHKDYHWRWDNHWRDFFRPSOLVKWKHIROORZLQJ" (QKDQFHWKHGR3RVWPHWKRGWRFDOOWKHPRGHO &RPSLOHWKHVHUYOHW 'HSOR\DQGWHVWWKHXSGDWHGZHEDSS 6KDUSHQ \RXU SHQFLO public class BeerSelect extends HttpServlet { Chapter 3. Mini MVC Tutorial Chapter 3. Mini MVC Tutorial Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1/2004 User number: 747221 Copyright 2007, Safari Books Online, LLC. This PDF is exclusively for your use in accordance with the Safari Terms of Service. No part of it may be reproduced or transmitted in any form by any means without the prior written permission for reprints and excerpts from the publisher. Redistribution or other use that violates the fair use priviledge under U.S. copyright laws (see 17 USC107) or that otherwise violates the Safari Terms of Service is strictly prohibited.  FKDSWHU SDFNDJHFRPH[DPSOHZHE LPSRUWFRPH[DPSOHPRGHO LPSRUWMDYD[VHUYOHW LPSRUWMDYD[VHUYOHWKWWS LPSRUWMDYDLR LPSRUWMDYDXWLO SXEOLFFODVV%HHU6HOHFWH[WHQGV+WWS6HUYOHW^ SXEOLFYRLGGR3RVW+WWS6HUYOHW5HTXHVWUHTXHVW    +WWS6HUYOHW5HVSRQVHUHVSRQVH WKURZV,2([FHSWLRQ6HUYOHW([FHSWLRQ^  UHVSRQVHVHW&RQWHQW7\SH³WH[WKWPO´  3ULQW:ULWHURXW UHVSRQVHJHW:ULWHU RXWSULQWOQ³%HHU6HOHFWLRQ$GYLFHEU!´  6WULQJF UHTXHVWJHW3DUDPHWHU³FRORU´   %HHU([SHUWEH QHZ%HHU([SHUW /LVWUHVXOW EHJHW%UDQGVF ,WHUDWRULW UHVXOWLWHUDWRU ZKLOHLWKDV1H[W^ RXWSULQW³EU!WU\³LWQH[W ` ` ` ;MZ^TM\^MZ[QWV\_WKWLM 2EMEMBERTHEMODELISJUSTPLAINOLD*AVASOWECALLITLIKEWEDCALLANY OTHER*AVAMETHODINSTANTIATETHEMODELCLASSANDCALLITSMETHOD Instantiate the BeerExpert class and call getBrands(). Print out the advice (beer brand items in the ArrayList returned from the model). In the Þnal (third) version, the advice will be printed from a JSP instead of the servlet. DonÕt forget the import for the package that BeerExpert is in. WeÕre modifying the original servlet, not making a new class. FDOOLQJWKHPRGHOIURPWKHVHUYOHWFRQWUROOHU Chapter 3. Mini MVC Tutorial Chapter 3. Mini MVC Tutorial Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1/2004 User number: 747221 Copyright 2007, Safari Books Online, LLC. This PDF is exclusively for your use in accordance with the Safari Terms of Service. No part of it may be reproduced or transmitted in any form by any means without the prior written permission for reprints and excerpts from the publisher. Redistribution or other use that violates the fair use priviledge under U.S. copyright laws (see 17 USC107) or that otherwise violates the Safari Terms of Service is strictly prohibited. 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Service is strictly prohibited Chapter 3 Mini MVC Tutorial Chapter 3 Mini MVC Tutorial Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1 /20 04 User number: 74 722 1 Copyright 20 07, Safari Books Online, LLC This PDF is exclusively for your use in accordance with... of Service is strictly prohibited Chapter 4 Being a Servlet Chapter 4 Being a Servlet Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1 /20 04 User number: 74 722 1 Copyright 20 07, Safari Books Online, LLC This PDF is exclusively for your use in accordance with... of Service is strictly prohibited Chapter 4 Being a Servlet Chapter 4 Being a Servlet Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1 /20 04 User number: 74 722 1 Copyright 20 07, Safari Books Online, LLC This PDF is exclusively for your use in accordance with... of Service is strictly prohibited Chapter 4 Being a Servlet Chapter 4 Being a Servlet Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1 /20 04 User number: 74 722 1 Copyright 20 07, Safari Books Online, LLC This PDF is exclusively for your use in accordance with... of Service is strictly prohibited Chapter 4 Being a Servlet Chapter 4 Being a Servlet Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1 /20 04 User number: 74 722 1 Copyright 20 07, Safari Books Online, LLC This PDF is exclusively for your use in accordance with... of Service is strictly prohibited Chapter 4 Being a Servlet Chapter 4 Being a Servlet Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1 /20 04 User number: 74 722 1 Copyright 20 07, Safari Books Online, LLC This PDF is exclusively for your use in accordance with... of Service is strictly prohibited Chapter 4 Being a Servlet Chapter 4 Being a Servlet Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1 /20 04 User number: 74 722 1 Copyright 20 07, Safari Books Online, LLC This PDF is exclusively for your use in accordance with... of Service is strictly prohibited Chapter 4 Being a Servlet Chapter 4 Being a Servlet Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1 /20 04 User number: 74 722 1 Copyright 20 07, Safari Books Online, LLC This PDF is exclusively for your use in accordance with... of Service is strictly prohibited Chapter 4 Being a Servlet Chapter 4 Being a Servlet Head First Servlets and JSP By Bert Bates, Kathy Sierra, Bryan Basham ISBN: 0596005407 Publisher: O'Reilly Prepared for Stephen Goss, Safari ID: stephengoss@gmx.net Print Publication Date: 8/1 /20 04 User number: 74 722 1 Copyright 20 07, Safari Books Online, LLC This PDF is exclusively for your use in accordance with . the JSP to use. 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