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

2、show.ReaderswithpreviousexperienceinnetworkprogramminginaUnix,Windows,orMacintoshenvironmentshouldbepleasantlysurprisedathowmucheasieritistowriteequivalentprogramsinJava.That'sbecausetheJavacoreAPIincludeswell-designedinterfacestomostnetworkfeatures.Indeed,thereisverylittleapplicationlayernetworks

3、oftwareyoucanwriteinCorC++thatyoucan'twritemoreeasilyinJava.JavaNetworkProgrammingendeavorstoshowyouhowtotakeadvantageofJava'snetworkclasslibrarytoquicklyandeasilywriteprogramsthataccomplishmanycommonnetworkingtasks.Theseinclude:?BrowsingpagesontheWeb?ParsingandrenderingHTML?SendingemailwithSMTP?R

4、eceivingemailwithPOPandIMAP?Writingmultithreadedservers?Installingnewprotocolandcontenthandlersintobrowsers?Encryptingcommunicationsforconfidentiality,authentication,andguaranteedmessageintegrity?DesigningGUIclientsfornetworkservices?PostingdatatoCGIprograms?LookinguphostsusingDNS?Downloadingfiles

5、withanonymousFTP?Connectingsocketsforlow-levelnetworkcommunication?DistributingapplicationsacrossmultiplesystemswithRemoteMethodInvocationJavaisthefirstlanguagetoprovidesuchapowerfulcross-platformnetworklibrarythathandlesallthesediversetasks.JavaNetworkProgrammingexposesthepowerandsophisticationof

6、thislibrary.Thisbook'sgoalistoenableyoutostartusingJavaasaplatformforseriousnetworkprogramming.Todoso,thisbookprovidesageneralbackgroundinnetworkfundamentalsaswellasdetaileddiscussionsofJava'sfacilitiesforwritingnetworkprograms.You'lllearnhowtowriteJavaappletsandapplicationsthatsharedataacrosstheI

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