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1、PrefaceJava?'sgrowthoverthelastfiveyearshasbeennothingshortofphenomenal.GivenJava'srapidrisetoprominenceandthegeneralinterestinnetworking,it'salittlesurprisingthatnetworkprogramminginJavaisstillsomysterioustosomany.Thisdoesn'thavetobe.Infact,writingnetworkprogramsinJavaisquitesimple,asthisbookwillsh

2、ow.ReaderswithpreviousexperienceinnetworkprogramminginaUnix,Windows,orMacintoshenvironmentshouldbepleasantlysurprisedathowmucheasieritistowriteequivalentprogramsinJava.That'sbecausetheJavacoreAPIincludeswell-designedinterfacestomostnetworkfeatures.Indeed,thereisverylittleapplicationlayernetworksoftw

3、areyoucanwriteinCorC++thatyoucan'twritemoreeasilyinJava.JavaNetworkProgrammingendeavorstoshowyouhowtotakeadvantageofJava'snetworkclasslibrarytoquicklyandeasilywriteprogramsthataccomplishmanycommonnetworkingtasks.Theseinclude:?BrowsingpagesontheWeb?ParsingandrenderingHTML?SendingemailwithSMTP?Receivi

4、ngemailwithPOPandIMAP?Writingmultithreadedservers?Installingnewprotocolandcontenthandlersintobrowsers?Encryptingcommunicationsforconfidentiality,authentication,andguaranteedmessageintegrity?DesigningGUIclientsfornetworkservices?PostingdatatoCGIprograms?LookinguphostsusingDNS?Downloadingfileswithanon

5、ymousFTP?Connectingsocketsforlow-levelnetworkcommunication?DistributingapplicationsacrossmultiplesystemswithRemoteMethodInvocationJavaisthefirstlanguagetoprovidesuchapowerfulcross-platformnetworklibrarythathandlesallthesediversetasks.JavaNetworkProgrammingexposesthepowerandsophisticationofthislibrar

6、y.Thisbook'sgoalistoenableyoutostartusingJavaasaplatformforseriousnetworkprogramming.Todoso,thisbookprovidesageneralbackgroundinnetworkfundamentalsaswellasdetaileddiscussionsofJava'sfacilitiesforwritingnetworkprograms.You'lllearnhowtowriteJavaappletsandapplicationsthatsharedataacrosstheInternetforga

7、mes,collaboration,softwareupdates,filetransferandmore.You'llalsogetabehind-the-sceneslookatHTTP,CGI,TCP/IP,andtheotherprotocolsthatsupporttheInternetandtheWeb.Whenyoufinishthisbook,you'llhavetheknowle