JD_AutoBuy里面为PY脚本文件京东抢购Python爬虫，自动登录京东网站，查询商品库存，价格，显示购物车详情等。
可以指定抢购商品，自动购买下单，然后手动去京东付款就行。
changlog2020-03-30实现二维码扫码登陆2021-01-27Golang版JD_AutoBuy运行环境Python2.7第三方库Requests:简单好用，功能强大的Http请求库beautifulsoup4:HTML文档格式化及便签选择器环境配置pipinstallrequestspipinstallbeautifulsoup4

DistributedSystems(3rd)英文无水印原版pdf第3版pdf所有页面使用FoxitReader、PDF-XChangeViewer、SumatraPDF和Firefox测试都可以打开本资源转载自网络，如有侵权，请联系上传者或csdn删除查看此书详细信息请在美国亚马逊官网搜索此书Copyright@2017MaartenvanSteenandAndrewS.TanenbaumPublishedbyMaartenvanSteenThisbookwaspreviouslypublishedby:PearsonEducation,IncISBN:978-15-430573-8-6(printedversion)ISBN:978-90-815406-2-9(digitalversion)Edition:3.Version:01(February2017)AllrightstotextandillustrationsarereservedbyMaartenvanSteenandAndrewS.Tanenbaum.Thisworkmaynotbecopied,reproduced,ortranslatedinwholeorpartwithoutwrittenpermissionofthepublisher,exceptforbriefexcerptsinreviewsorscholanyformofinformationstorageadaptationorwhatever,computersoftware,orbysimilarordissimilarmethodsnowknownordevelopedinthefutureisstrictlyforbiddenwithoutwrittenpermissionofthepublisherToMarielle,max,andelkeMVSToSuzanneBarbara,Marvin,Aronnathan,olivia,andmirteASTCONTENTSPreface1Introduction1.1Whatisadistributedsystem?Characteristic1:Collectionofautonomouscomputingelements2Characteristic2:SinglecoherentsystemMiddlewareanddistributedsystems1.2DesigngoalsSupportingresourcesharingMakingdistributiontransparent12Beingscalable15Pitfalls243Typesofdistributedsystems24Highperformancedistributedcomputing25Distributedinformationsystems34Pervasivesystems1.4Summary522Architectures552.1Architecturalstyles56Layeredarchitectures.57Object-basedandservice-orientedarchitectures62Resource-basedarchitectures64Publish-subscribearchitectures2.2MiddlewareorganizationWrappersInterceptors垂番Modifiablemiddleware752.3SystemarchitectureCONTENTSCentralizedorganizations76Decentralizedorganizations:peer-to-peersystemsHybridarchitectures2.4Examplearchitectures94TheNetworkFilesystem94TheWeb982.5Summary3Processes1033.1Threads..104Introductiontothreads104Threadsindistributedsystems1113.2Virtualization116Principleofvirtualizationapplicationofvirtualmachinestodistributedsystems,1223.3Clients124Networkeduserinterfaces124Client-sidesoftwarefordistributiontransparency1273.4Servers128Generaldesignissues129Objectservers133Example:TheApacheWebserver139Serverclusters,,,,,,,1413.5Codemigration152Reasonsformigratingcode152Migrationinheterogeneoussystems1583.6Summary1614Communication4.1Foundations164LayeredProtocols164TypesofCommunication.1724.2Remoteprocedurecall..173Basicrpcoperation174Parameterpassing178RPC-basedapplicationsupport182VariationsonrPc185Example:dCErPc,.1884.3Message-orientedcommunication193Simpletransientmessagingwithsockets.193Advancedtransientmessaging198Message-orientedpersistentcommunication206Example:IBM'sWebSpheremessage-queuingsystem212Example:AdvancedMessageQueuingProtocol(AMQP)....218DS3.01DOWNLOADEDBYTEWIGOMIXMAIL.INFOCONTENTS4.4Multicastcommunication221Application-leveltree-basedmulticasting221Flooding-basedmulticasting225Gossip-baseddatadissemination2294.5Summary2345Naming2375.1Names,identifiersandaddresses2385.2Flatnaming.241Simplesolutions241Home-basedapproaches245Distributedhashtables246Hierarchicalapproaches2515.3Structurednaming256Namespaces.256Nameresolution259Theimplementationofanamespace264Example:TheDomainNameSystem271Example:TheNetworkFileSystem2785.4Attribute-basednaming283Directoryservices283Hierarchicalimplementations:LDAP285Decentralizedimplementations2885.5Summary2946Coordination2976.1Clocksynchronization.298Physicalclocks299Clocksynchronizationalgorithms3026.2Logicalclocks310Lamport'slogicalclocks310Vectorclocks3166.3Mutualexclusion321322acentralizedalgorithm.322adistributedalgorithm323atoken-ringalgorithm.325adecentralizedalgorithm3266.4Electionalgorithms329Thebullyalgorithm.,..330Aringalgorithm332Electionsinwirelessenvironments333Electionsinlarge-scalesystems.3356.5Locationsystems336DOWNLOADEDBYTEWIGOMIXMAIL.INFODS301VIllCONTENTSGPS:GlobalPositioningSystem337WhengPsisnotanoption339Logicalpositioningofnodes3396.6Distributedeventmatching..343Centralizedimplementations3436.7Gossip-basedcoordination349asgregation349Apeer-samplingservice350Gossip-basedoverlayconstruction3526.8Summary3537Consistencyandreplication3557.1Introduction356Reasonsforreplication356Replicationasscalingtechnique3577.2Data-centricconsistencymodels358Continuousconsistency359Consistentorderingofoperations364Eventualconsistency3737.3Client-centricconsistencymodels375MonotonicreadsMonotonicwrites.379Readyourwrite380Writesfollowreads3827.4ReplicamanagementFindingthebestserverlocation383Contentreplicationandplacement..385Contentdistribution..388Managingreplicatedobjects3937.5Consistencyprotocols.396Continuousconsistency..........396Primary-basedprotocols398Replicated-writeprotocolsCache-coherence403Implementingclient-centricconsistency,,...4077.6Example:CachingandreplicationintheWeb4097.7Summar4208Faulttoleran4238.1Introductiontofaulttolerance424Basicconcepts.424Failuodels427Failuremaskingbyredundancy8.2Processresilience432DS3.01DOWNLOADEDBYTEWIGOMIXMAIL.INFO

使用AbstractTableModel构建Table在表格中添加JButton按钮，之前在网上找了2天没有找到好用的程序，最终终于找到一个好用的例子。
不要使，我退你们分。
。
singtheSwingJTableclasscanquicklybecomeastickybusinesswhenyouwanttocustomizeittoyourspecificneeds.FirstyoumustbecomefamiliarwithhowtheJTableclassisorganized.IndividualcellsarerenderedbyTableCellRendererimplementations.ThetablecontentsarerepresentedbyanimplementationoftheTableModelinterface.Bydefault,JTableusesDefaultTableCellRenderertodrawitscells.DefaultTableCellRendererrecognizesafewprimitivetypes,renderingthemasstrings,andcanevendisplayBooleantypesascheckboxes.ButitdefaultstodisplayingthevaluereturnedbytoString()fortypesitdoesnotspecificallyhandle.YouhavetoprovideyourownTableCellRendererimplementationifyouwanttodisplaybuttonsinaJTable.TheTableCellRendererinterfacecontainsonlyonemethod,getTableCellRendererComponent(...),whichreturnsajava.awt.Componentthatknowshowtodrawthecontentsofaspecificcell.Usually,getTableCellRendererComponent()willreturnthesamecomponentforeverycellofacolumn,toavoidtheunnecessaryuseofextramemory.Butwhenthecontentsofacellisitselfacomponent,itisallrighttoreturnthatcomponentastherenderer.Therefore,thefirststeptowardshavingJButtonsdisplaycorrectlyinaJTableistocreateaTableCellRendererimplementationthatreturnstheJButtoncontainedinthecellbeingrendered.Intheaccompanyingcodelisting,JTableButtonRendererdemonstrateshowtodothis.EvenaftercreatingacustomTableCellRenderer,you'restillnotdone.TheTableModelassociatedwithagivenJTabledoesnotonlykeeptrackofthecontentsofeachcell,butitalsokeepstrackoftheclassofdatastoredineachcolumn.DefaultTableModelisdesignedtoworkwithDefaultTableCellRendererandwillreturnjava.lang.String.classforcolumnscontainingdatatypesthatitdoesnotspecificallyhandle.Theexact

发现问题最近在项目中用到了canvas的toDataURL方法来获取图片的base64格式数据，用以上传到后台。
由于之前也遇到过canvas被跨域图片污染不能获取数据的坑，因此这回一开始就机智的把crossOrigin属性值加上，代码大概如下：constcanvas=document.createElement("canvas");constcontext=canvas.getContext("2d");context.fillStyle="black";context.fillRect(0,0,canvas.width,canvas.h

关于r-shinyjqui主页：:软件包许可证：麻省理工学院原料许可证：BSD3-条款简介：Shiny的扩展，通过jQueryUI库提供交互和动画效果。
当前构建状态所有平台：当前发行信息姓名资料下载版本平台类安装r-shinyjqui安装r-shinyjqui从conda-forge通道可以通过添加可以实现conda-forge到您的频道：condaconfig--addchannelsconda-forge一旦conda-forge信道已被启用，r-shinyjqui可以安装有：condainstallr-shinyjqui可以列出您平台上可用的所有r-shinyjqui版本，其中包括：condasearchr-shinyjqui--channelconda-forge关于conda福奇conda-fo

ConvexAnalysisR.TYRREllRockAffellar学习凸分析的经典之作

OverviewThisOPCUAreferenceimplementationistargetingthe.NETStandardLibrary..NetStandardallowsdevelopingappsthatrunonallcommonplatformsavailabletoday,includingLinux,iOS,Android(viaXamarin)andWindows7/8/8.1/10(includingembedded/IoTeditions)withoutrequiringplatform-specificmodifications.Furthermore,cloudapplicationsandservices(suchasASP.Net,DNX,AzureWebsites,AzureWebjobs,AzureNanoServerandAzureServiceFabric)arealsosupported.Featuresincluded1. FullyportedCoreUAstackandSDK(Client,Server,Configuration&Sampleassemblies)2. SampleServersandClients,includingallrequiredcontrols,for.Net4.6,.NetCoreandUWP.3. X.509certificatesupportforclientandserverauthentication4. Anonymous,username,X.509certificate(experimental)andJWT(experimental)userauthentication5. UA-TCP&HTTPStransports(clientandserver)6. Foldercertificate-storesupport7. Sessions(includingUIsupportinthesamples)8. Subscriptions(includingUIsupportinthesamples)GettingStartedAllthetoolsyouneedfor.NetStandardcomewiththe.NetCoretools.Seehereforwhatyouneed.HowtocreateselfsignedcertificatesforthesampleapplicationsOnWindows1. Openacommandpromptintherootfolderofyourrepository2. RunthescriptCreateAllCerts.cmdintherootfolderofyourrepositorytocreatethecertificatesforallsampleapplications.3. Alternatively,youcanrunthescriptCreateCert.cmdineachsampleprojectfoldertocreatenewselfsignedcertificatesfortheapplication.4. TheselfsignedcertificatesarestoredinOPCFoundation/CertificateStores/MachineDefaultineachapplicationprojectfolderOnLinux1. Openacommandprompt2. Navigatetotheprojectfolderofthesampleapp,e.g.SampleApplications/Samples/NetCoreConsoleClient3. Runthescript./createcert.shtocreatethecertificatesforthesampleapplications.4. TheselfsignedcertificatesarestoredinOPCFoundati

DELLR720H310阵列卡驱动(win2003X64,win2008X64)本人安装过，好用，里边包含用U盘制作工具，相当好用

AsuswrtisthenameofthecommonfirmwareAsushasdevelopedfortheirvariousroutermodels.OriginallyforkedfromTomato,ithassincegrownintoaverydifferentproduct,removingsomemoretechnicalfeaturesthatwerepartofTomato,butalsoaddingneworiginalfeaturessuchassupportfordualWANs.Asuswrt-merlinisacustomizedversionofAsus'sfirmware.ThegoalistoprovidebugfixesandminorenhancementstoAsus'sfirmware,withalsoafewoccasionalfeatureadditions.Thisisdonewhileretainingthelookandfeeloftheoriginalfirmware,andalsoensuringthatthetwocodebasesremaincloseenoughsoitwillremainpossibletokeepupwithanynewfeaturesbroughtbyAsusintheoriginalfirmware.Thisproject'sgoalisNOTtodevelopyetanotherfirmwarefilledwithmanyfeaturesthatarerarelyusedbyhomeusers-thatisalreadycoveredbyotherexcellentprojectssuchasTomatoorDD-WRT.Thismoreconservativeapproachwillalsohelpensuringthehighestlevelofstabilitypossible.Priorityisgiventostabilityoverperformance,andperformanceoverfeatures.

ProfessionalExcelDevelopment:TheDefinitiveGuidetoDevelopingApplicationsUsingMicrosoftExcel,VBA,and.NET(2ndEdition)2ndEditionbyRobBovey(Author),DennisWallentin(Author),StephenBullen(Author),JohnGreen(Author)“AsExcelapplicationsbecomemorecomplexandtheWindowsdevelopmentplatformmorepowerful,Exceldevelopersneedbookslikethistohelpthemevolvetheirsolutionstothenextlevelofsophistication.ProfessionalExcelDevelopmentisabookfordeveloperswhowanttobuildpowerful,state-of-the-artExcelapplicationsusingthelatestMicrosofttechnologies.”–GabhanBerry,ProgramManager,ExcelProgrammability,Microsoft“ThefirsteditionofProfessionalExcelDevelopmentismymost-consultedandmost-recommendedbookonOfficedevelopment.Thesecondeditionexpandsboththedepthandrange.Itshinesbecauseittakeseveryissueonestepfurtherthanyouexpect.Thebookreliesontheauthors’current,real-worldexperiencetocovernotonlyhowafeatureworks,butalsothepracticalimplicationsofusingitinprofessionalwork.”–ShaunaKelly,Director,ThendaraGreen“Thisbookillustratestechniquesthatwillresultinwell-designed,robust,andmaintainableExcel-basedapplications.Theauthors’advicecomesfromdecadesofsolidexperienceofdesigningandbuildingapplications.Thepracticalityofthemethodsiswellillustratedbytheexampletimesheetapplicationthatisdevelopedstep-by-stepthroughthebook.EveryseriousExceldevelopershouldreadthisandlearnfromit.Idid.”–BillManville,ApplicationDeveloper,BillManvilleAssociatesTheStart-to-FinishGuidetoBuildingState-of-the-ArtSolutionswithExcel2007Inthisbook,fourworld-classMicrosoft®Exceldevelopersofferstart-to-finishguidanceforbuildingpowerful,robust,andsecureapplicationswithExcel.Theauthors—threeofwhomhavebeenhonoredbyMicrosoftasExcelMostValuableProfessionals(MVPs)—showhowtoconsist

在日常工作中，钉钉打卡成了我生活中不可或缺的一部分。然而，有时候这个看似简单的任务却给我带来了不少烦恼。 每天早晚，我总是得牢记打开钉钉应用，点击"工作台"，再找到"考勤打卡"进行签到。有时候因为工作忙碌，会忘记打卡，导致考勤异常，影响当月的工作评价。而且，由于我使用的是苹果手机，有时候系统更新后，钉钉的某些功能会出现异常，使得打卡变得更加麻烦。 另外，我的家人使用的是安卓手机，他们也经常抱怨钉钉打卡的繁琐。尤其是对于那些不太熟悉手机操作的长辈来说，每次打卡都是一次挑战。他们总是担心自己会操作失误，导致打卡失败。 为了解决这些烦恼，我开始思考是否可以通过编写一个全自动化脚本来实现钉钉打卡。经过一段时间的摸索和学习，我终于成功编写出了一个适用于苹果和安卓系统的钉钉打卡脚本。