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1、CopyrightNoticeCopyright©2001–2002byLukeHohmannAllrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmitted,inanyformorbyanymeans,electronic,mechanical,photocopying,recording,orotherwise,withoutpriorwrittenpermissionoftheauthor.Acknowledgments[needtoaddmore]Thanks
2、toallofthepeoplethathavehelpedmecreatethisbook.IamespeciallyindebtedtoDonOlsen,HaimKilov,RebeccaWirfs-Brock,MyronAhn,RonLunde,ScottAmblerfortheirdetailedreviewoftheentirebook.Someofyouwereespeciallycritical,andthebookisbetterforyourcriticisms.SteveSweeting,CraigLarman,SandraCarrico,AdamJackson,Tony
3、Navarette,ChrisReavis,ElisabethHendrickson,andAlanShallowayallprovideddetailedreviewsofoneormorechapters.AveryspecialthanksgoestoBobGlassforworkingwithmetocreatethenewtitle.SteveDodds,LeeSigler,andawholehostofstudentsandcolleagueshaveprovidedmewithinspirationandfriendshipasIundertookthisproject.Spe
4、cialthankstomygoodfriendandpublisherPaulBecker,whopatientlywaitedformetowritethisbook.Paul,thanksforyourwillingnesstokeepwaitinguntilIhadsomethingtosay.Ihaveundoubtedlyforgottentomentiononeormoreindividualswhohavehelpedinthecreationofthisbook.Thiswas,bynomeans,intentional.Tellme,andI’llcorrecttheer
5、rorinthenextedition!HOHMANNi“Itisnotthecriticwhocounts,notthemanwhopointsouthowthestrongmanstumbled,orwherethedoerofdeedscouldhavedonethembetter.Thecreditbelongstothemanwhoisactuallyinthearena;whosefaceismarredbydustandsweatandblood;whostrivesvaliantly;whoerrsandcomesshortagainandagain;whoknowstheg
6、reatenthusiasms,thegreatdevotions;whospendshimselfinaworthycause;who,atthebest,knowsintheendthetriumphofhighachievement,andwho,attheworst,ifhefails,atleastfailswhiledaringgreatly;sothathisplaceshallneverbewiththosecoldandtimidsoulswhoknowneithervictorynordefeat.—TheodoreRooseveltContents1.SOFTWAREA
7、RCHITECTURE1-11.1DEFININGSOFTWAREARCHITECTURE__________________________________1-11.2ALTERNATIVETHOUGHTSOFSOFTWAREARCHITECTURE______________________1-21.3WHYSOFTWAREARCHITECTUREMATTERS______________________