使用eclipse 远程调试java 应用程序

DEBUGJAVAAPPLICATIONSREMOTELYWITHECLIPSEUSETHEPOWEROFTHEECLIPSEIDETOSPREADAROUNDYOURJAVAAPPLICATIONDEBUGGINGLEVELINTERMEDIATECHARLESLUCHARLESLUTWIBMCOM,SOFTWAREENGINEER,IBM09DEC2008YOUDONTNEEDTODEBUGJAVAAPPLICATIONSONJUSTYOURLOCALDESKTOPLEARNHOWTOSPREADAROUNDYOURDEBUGGINGUSINGDIFFERENTCONNECTIONTYPESTHATMAKEUPREMOTEDEBUGGINGTHISARTICLEEXPLAINSTHEFEATURESANDEXAMPLESTHATSHOWHOWTOSETUPREMOTEAPPLICATIONDEBUGGINGREMOTEDEBUGGINGCANBEUSEFULFORAPPLICATIONDEVELOPMENT,SUCHASDEVELOPINGAPROGRAMFORALOWENDMACHINETHATCANNOTHOSTTHEDEVELOPMENTPLATFORM,ORDEBUGGINGPROGRAMSONDEDICATEDMACHINESLIKEWEBSERVERS,WHOSESERVICESCANNOTBESHUTDOWNOTHEREXAMPLESINCLUDEJAVAAPPLICATIONSRUNNINGWITHLIMITEDMEMORYORCPUPOWER,SUCHASMOBILEDEVICES,ORDEVELOPERSWANTINGTOSEPARATETHEAPPLICATIONANDDEVELOPMENTENVIRONMENTS,ETCPREREQUISITESIFYOUDONTHAVEITALREADY,DOWNLOADECLIPSEV34GANYMEDEINGANYMEDE,THESOCKETLISTENINGCONNECTORHASBEENADDEDTOTHEREMOTEJAVAAPPLICATIONLAUNCHCONFIGURATIONTYPEECLIPSESNEWSOCKETLISTENINGCONNECTORALLOWSYOUTOSTARTTHEJAVADEBUGGER,WHICHLISTENSFORACONNECTIONONASPECIFICSOCKETTHEPROGRAMBEINGDEBUGGEDCANTHENBESTARTEDWITHCOMMANDLINEOPTIONSTOCONNECTTOTHEDEBUGGERPRIORTOTHEGANYMEDERELEASE,ONLYASOCKETATTACHINGCONNECTORWASPROVIDED,ANDTHEPROGRAMBEINGDEBUGGEDHADTOBEADEBUGHOSTTHATWASCONNECTEDBYTHEDEBUGGERITISIMPRACTICALFORMOBILEDEVICESTOBEAHOSTDUETOINSUFFICIENTMEMORYANDCPUPOWERTOUSEREMOTEDEBUGGING,JAVAVIRTUALMACHINEJVMV50ORLATERMUSTBEUSED,SUCHASIBMJ9ORSUNMICROSYSTEMSJAVASEDEVELOPMENTKITJDKINTHISARTICLE,WEFOCUSONREMOTEDEBUGGING,RATHERTHANDETAILEACHOFECLIPSESDEBUGGINGFEATURESSEERESOURCESFORMOREINFORMATIONABOUTDEBUGGINGWITHECLIPSEANDWHERETOFINDTHEAFOREMENTIONEDSOFTWAREJPDAINTRODUCTIONSUNMICROSYSTEMSJAVAPLATFORMDEBUGGERARCHITECTUREJPDATECHNOLOGYISAMULTITIEREDARCHITECTURETHATALLOWSYOUTODEBUGJAVAAPPLICATIONSINALLSITUATIONSEASILYTHEJPDACONSISTSOFTWOINTERFACESTHEJVMTOOLINTERFACEANDJDI,RESPECTIVELY,APROTOCOLJAVADEBUGWIREPROTOCOL,ANDTWOSOFTWARECOMPONENTSTHATTIETHEMTOGETHERBACKENDANDFRONTENDITSDESIGNEDFORUSEBYDEBUGGERSINANYENVIRONMENTJPDAISNOTONLYFORDESKTOPSYSTEMSBUTWORKSWELLWITHEMBEDDEDSYSTEMS,TOOTHEJVMTOOLINTERFACEJVMTIDEFINESTHATAVMMUSTPROVIDEFORDEBUGGINGEDITORSNOTESTARTINGWITHJAVAV5,JVMTIREPLACEDJVMDI,WHICHWASUSEDINJAVAV14THEJAVADEBUGWIREPROTOCOLJDWPDESCRIBESTHEFORMATOFDEBUGGINGINFORMATIONANDREQUESTSTRANSFERREDBETWEENTHEPROCESSBEINGDEBUGGEDANDADEBUGGERLAUNCHCONFIGURATIONTYPEALAUNCHCONFIGURATIONKEEPSASETOFATTRIBUTESTHATCANBEUSEDTOLAUNCHAPROGRAMTHELAUNCHCONFIGURATIONTYPEISAUNIQUETYPEOFPROGRAMTHATCANBELAUNCHEDINTHEECLIPSEPLATFORMFREQUENTLYUSEDACRONYMSJDIJAVADEBUGINTERFACEJDTJAVADEVELOPMENTTOOLSJDWPJAVADEBUGWIREPROTOCOLJPDAJAVAPLATFORMDEBUGGERARCHITECTUREJVMJAVAVIRTUALMACHINEJVMDIJVMDEBUGINTERFACEJVMTIJVMTOOLINTERFACEVMVIRTUALMACHINEFRONTEND,WHICHIMPLEMENTSTHEJDI,SUCHASECLIPSE,BORLANDJBUILDER,ANDMANYOTHERSTHEPROGRAMBEINGDEBUGGEDISOFTENCALLEDTHEDEBUGGEEINSUNSJPDASPECIFICATIONTHEJDIISAHIGHLEVELINTERFACETODEFINETHEINFORMATIONANDREQUESTSUSEDFORREMOTEDEBUGGINGTHEARCHITECTUREISSTRUCTUREDASFOLLOWSLISTING1THEJAVAPLATFORMDEBUGGERARCHITECTURECOMPONENTSDEBUGGERINTERFACES/|/|VM|DEBUGGEE|LOADSTHEIMPLEMENTATIONOFJDWPINTHETARGETVMITUSESATRANSPORTANDTHEJDWPPROTOCOLTOCOMMUNICATEWITHASEPARATEDEBUGGERAPPLICATIONSPECIFICSUBOPTIONSAREDESCRIBEDBELOWSTARTINGFROMJAVAV5,YOUCANUSETHEAGENTLIBJDWPOPTION,INSTEADOFXDEBUGANDXRUNJDWPBUTIFYOUHAVETOCONNECTTOTHEVMPRIORTOV5,XDEBUGANDXRUNJDWPWILLBETHEONLYCHOICEFOLLOWINGAREBRIEFDESCRIPTIONSOFTHEXRUNJDWPSUBOPTIONSTRANSPORTGENERALLY,SOCKETTRANSPORTISUSEDBUTSHAREDMEMORYTRANSPORTCANALSOBEUSEDONTHEWINDOWSPLATFORM,IFAVAILABLESERVERIFTHEVALUEISY,THETARGETAPPLICATIONLISTENSFORADEBUGGERAPPLICATIONTOATTACHOTHERWISE,ITATTACHESTOADEBUGGERAPPLICATIONATTHESPECIFIEDADDRESSADDRESSTHISISTHETRANSPORTADDRESSFORTHECONNECTIONIFTHESERVERISN,ATTEMPTTOATTACHTOADEBUGGERAPPLICATIONATTHISADDRESSOTHERWISE,LISTENFORACONNECTIONATTHISPORTSUSPENDIFTHEVALUEISY,THETARGETVMWILLBESUSPENDEDUNTILTHEDEBUGGERAPPLICATIONCONNECTSFORDETAILEDEXPLANATIONSFOREACHDEBUGSETTING,REFERTOTHEJPDADOCUMENTATIONSEERESOURCESLISTING2SHOWSANEXAMPLEOFHOWTOLAUNCHAVMINDEBUGMODEANDLISTENFORASOCKETCONNECTIONATPORT8765LISTING2TARGETVMACTSASADEBUGSERVERXDEBUGXRUNJDWPTRANSPORTDT_SOCKET,SERVERY,ADDRESS8765LISTING3SHOWSHOWTOATTACHTOARUNNINGDEBUGGERAPPLICATIONUSINGASOCKETONHOST127001ATPORT8000LISTING3TARGETVMACTSASADEBUGCLIENTXDEBUGXRUNJDWPTRANSPORTDT_SOCKET,ADDRESS1270018000REMOTEDEBUGGINGFEATURESINECLIPSEECLIPSEISAGRAPHICALJAVADEBUGGERFRONTENDTHEJDIISIMPLEMENTEDINORGECLIPSEJDTDEBUGBUNDLEINTHISARTICLE,WEDONTDISCUSSTHEDETAILSOFJDIIMPLEMENTATIONSEERESOURCESFORINFORMATIONABOUTECLIPSEJDTANDJAVAJDITECHNOLOGYTHEFIRSTTHINGWEWANTTOKNOWISWHICHECLIPSECONNECTORTOUSETOLEARNTHEREMOTECONNECTIONTYPESPROVIDEDBYECLIPSE,YOUCANADDALAUNCHCONFIGURATIONINREMOTEJAVAAPPLICATIONBYGOINGTOTHEECLIPSEMENUANDSELECTINGRUNDEBUGCONFIGURATIONS,THENSELECTINGTHECONNECTORFROMTHEDROPDOWNLISTTWOCONNECTORSAREPROVIDEDINGANYMEDESOCKETATTACHSOCKETLISTENFORTHESOCKETLISTENINGCONNECTOR,THEECLIPSEVMWILLBETHEHOSTTOBECONNECTEDBYTHEREMOTEJAVAAPPLICATIONFORTHESOCKETAT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UGGERARCHITECTUREDOCUMENTATIONTOLEARNMOREABOUTJPDAREADTHEJAVADEBUGINTERFACEDOCUMENTATIONTOLEARNMOREABOUTJDITHEJDTPROJECTPROVIDESTHETOOLPLUGINSTHATIMPLEMENTAJAVAIDESUPPORTINGTHEDEVELOPMENTOFANYJAVAAPPLICATION,INCLUDINGECLIPSEPLUGINSCHECKOUTTHE“RECOMMENDEDECLIPSEREADINGLIST“BROWSEALLTHEECLIPSECONTENTONDEVELOPERWORKSNEWTOECLIPSEREADTHEDEVELOPERWORKSARTICLE“GETSTARTEDWITHECLIPSEPLATFORM“TOLEARNITSORIGINANDARCHITECTURE,ANDHOWTOEXTENDECLIPSEWITHPLUGINSEXPANDYOURECLIPSESKILLSBYCHECKINGOUTIBMDEVELOPERWORKSECLIPSEPROJECTRESOURCESTOLISTENTOINTERESTINGINTERVIEWSANDDISCUSSIONSFORSOFTWAREDEVELOPERS,CHECKOUTCHECKOUTDEVELOPERWORKSPODCASTSSTAYCURRENTWITHDEVELOPERWORKSTECHNICALEVENTSANDWEBCASTSWATCHANDLEARNABOUTIBMANDOPENSOURCETECHNOLOGIESANDPRODUCTFUNCTIONSWITHTHENOCOSTDEVELOPERWORKSONDEMANDDEMOSCHECKOUTUPCOMINGCONFERENCES,TRADESHOWS,WEBCASTS,ANDOTHEREVENTSAROUNDTHEWORLDTHATAREOFINTERESTTOIBMOPENSOURCEDEVELOPERSVISITTHEDEVELOPERWORKSOPENSOURCEZONEFOREXTENSIVEHOWTOINFORMATION,TOOLS,ANDPROJECTUPDATESTOHELPYOUDEVELOPWITHOPENSOURCETECHNOLOGIESANDUSETHEMWITHIBMSPRODUCTSGETPRODUCTSANDTECHNOLOGIESTHEJAVA2STANDARDEDITIONV5ORGREATERISAVAILABLEFROMSUNMICROSYSTEMSCHECKOUTTHELATESTECLIPSETECHNOLOGYDOWNLOADSATIBMALPHAWORKSDOWNLOADECLIPSEPLATFORMANDOTHERPROJECTSFROMTHEECLIPSEFOUNDATIONDOWNLOADIBMPRODUCTEVALUATIONVERSIONS,ANDGETYOURHANDSONAPPLICATIONDEVELOPMENTTOOLSANDMIDDLEWAREPRODUCTSFROMDB2,LOTUS,RATIONAL,TIVOLI,ANDWEBSPHEREINNOVATEYOURNEXTOPENSOURCEDEVELOPMENTPROJECTWITHIBMTRIALSOFTWARE,AVAILABLEFORDOWNLOADORONDVDABOUTTHEAUTHORCHARLESLUISASOFTWAREDEVELOPERATTHEIBMCHINASOFTWAREDEVELOPMENTLABANDCURRENTLYWORKSONIBMLOTUSEXPEDITORDEVELOPMENTHEISINTERESTEDINDEVICEPROGRAMMING,INSTANTMESSAGING,ANDVOICETECHNOLOGY本文来自于HTTP/WWWIBMCOM/DEVELOPERWORKS/JAVA/LIBRARY/OSECLIPSEJAVADEBUG/INDEXHTMLS_TACT105AGX02PUBLICCLASSTESTPUBLICSTATICVOIDMAINSTRINGARGSSYSTEMOUTPRINTLN“THISISATEST“2设置一个断点在代码中设置一个断点。在这个例子中，我们在SYSTEMOUTPRINTLN“THISISATEST“这行中设置断点。图2在ECLIPSE中设置断点3从本地调试应用程序在调试应用程序之前，确保已经为项目启用图1中描述的调试选项。从本地调试应用程序是没有必要的，但是这可以确保是否所有调试信息都可用。右键单击JAVA项目，并选择DEBUGAS，然后选择JAVAAPPLICATION（参见图3）。如果应用程序在断点处停止执行，则表明调试信息正确显示。这时，可以继续使用这些调试特性，比如显示调试堆栈、变量或断点管理等等。图3从本地调试应用程序4导出JAVA项目我们将使用这个应用程序作为调试目标。右键单击JAVA项目，选择EXPORT，然后选择JAVA，最后选择JARFILE或RUNNABLEJARFILE导出项目。将在指定的位置生成JAR文件。注意，如果JAVA源代码与目标应用程序不匹配，调试特性将不能正常工作。5手动运行JAVA应用程序打开控制台手动启动应用程序，确保正确配置了JAVA运行时环境。清单5调用JAVA应用程序的示例JAVAJARTESTJAR6远程调试应用程序将JAR文件复制到远程计算机或同一台计算机上的适当位置，调用调试服务器，然后为它添加一个客户机。简单的JAVA应用程序就可以充当调试服务器或客户机。您可以在ECLIPSE中选择SOCKETATTACH或SOCKETLISTEN连接类型，这取决于特定的配置。接下来的两个小节将学习如何将应用程序作为服务器或客户机运行。作为调试服务器的目标VM下面这个示例远程调用JAVA应用程序作为调试服务器，并在端口8000监听套接字连接。目标VM将暂停，直到调试器连接。清单6ECLIPSE连接套接字模式下的VM调用示例JAVAXDEBUGXRUNJDWPTRANSPORTDT_SOCKET,SERVERY,ADDRESS“8000“JARTESTJAR使用远程启动配置启动ECLIPSE，并指定远程应用程序的目标VM地址。为此，单击RUNDEBUGCONFIGURATIONS，然后在ECLIPSE菜单中双击REMOTEJAVAAPPLICATION。从最新创建的启动配置中为目标应用程序指定IP和端口。为了在同一台机器上运行远程应用程序，仅需将主机IP指定为LOCALHOST或127001。图4连接套接字连接的配置选择ALLOWTERMINATIONOFREMOTEVM选项终止在应用程序调试期间连接的VM。图5ECLIPSE中的TERMINATE按钮作为调试客户机的目标VM第二个示例使用一个简单的JAVA应用程序作为调试客户机，并且调试器前端作为调试服务器。ECLIPSE使用套接字监听模式连接类型进行监听。必须先启动调试前端来监听特定的端口。图6给出一个用于设置监听的示例配置。图6监听套接字连接的配置单击ECLIPSEDEBUG按钮，状态栏将显示消息“WAITINGFORVMTOCONNECTATPORT8000”。看到这个消息后，启动远程应用程序。清单7显示了如何将JAVA应