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使用 J-Interop 在 Java 中调用WMI
5评/2834阅
发表于: 2011-06-16 07:12

有关WMI的小知识

Windows管理规范（WMI）是微软对来自分布式管理任务组（DMTF）的基于Web的企业管理（WBEM）和通用信息模型（CIM）标准的实现。WMI用于访问Windows系统、应用、网络、设备等组件，并管理它们。连接到一台机器通过DCOM进行管理。因此，有关DCOM的小知识将有助于本文的理解。你可以到MSDN了解有关WMI的更多细节。

J-Interop

市场上有一些在使用 JAVA 调用 WMI 的好库，包括 J-Interop、JACOB-Project 和 J-Integra。其中，我更喜欢J-Interop，因为它是完全免费和开源的API。它提供了没有任何依赖的纯DCOM桥，完全用Java编写的没有任何JNI代码。

使用WMI管理Windows服务

现在，来看一个使用JAVA调用WMI的例子。这个例子利用J-Interop的API使用Win32_Service类解释WMI操作，将启动和停止在这个例子中的窗口服务。

步骤1：连接到WBEM服务

下面的代码示例显示了使用J-Interop如何初始化DCOM会话，并连接到远程DCOM服务使。它使用SWbemLocator对象连接到SWbemServices，SWbemServices对象提供对本地或远程计算机WMI的访问，它调用“ConnectServer”方法连接到SWbemServices。在本例中，提供管理员级别的用户连接到远程计算机。

JISessiondcomSession=JISession.createSession(domainName,userName,password);
dcomSession.useSessionSecurity(false);
 
JIComServercomServer=newJIComServer(valueOf("WbemScripting.SWbemLocator"),hostIP,dcomSession);
IJIDispatchwbemLocator=(IJIDispatch)narrowObject(comServer.createInstance().queryInterface(IID));
//parameterstoconnecttoWbemScripting.SWbemLocator
Object[]params=newObject[]{
                          newJIString(hostIP),//strServer
                          newJIString(win32_namespace),//strNamespace
                          JIVariant.OPTIONAL_PARAM(),//strUser
                          JIVariant.OPTIONAL_PARAM(),//strPassword
                          JIVariant.OPTIONAL_PARAM(),//strLocale
                          JIVariant.OPTIONAL_PARAM(),//strAuthority
                          newInteger(0),//iSecurityFlags
                          JIVariant.OPTIONAL_PARAM()//objwbemNamedValueSet
                          };
 
JIVariantresults[]=wbemLocator.callMethodA("ConnectServer",params);
IJIDispatchwbemServices=(IJIDispatch)narrowObject(results[0].getObjectAsComObject());

（domainName=远程计算机域名，hostIP=远程计算机IP地址,用户名=管理员级别的用户，密码=密码）

第2步：获取Win32_Service实例

一旦你获得对SWbemServices对象的引用，就可以调用这个类的任何方法。其中WbemServices.InstancesOf方法获得任何Win32类的实例。

也可以使用WMI查询语言(WQL)达到同样的目的，如下所示：

finalintRETURN_IMMEDIATE=0x10;
finalintFORWARD_ONLY=0x20;
Object[]params=newObject[]{
newJIString("SELECT*FROMWin32_Service"),
JIVariant.OPTIONAL_PARAM(),
newJIVariant(newInteger(RETURN_IMMEDIATE+FORWARD_ONLY))
};
JIVariant[]servicesSet=wbemServices.callMethodA("ExecQuery",params);
IJIDispatchwbemObjectSet=(IJIDispatch)narrowObject(servicesSet[0].getObjectAsComObject());

第三步：执行方法

现在，已得到Win32_Service类的实例，可采用下述代码来调用同一类的方法，因为，它返回多个服务实例，要列举它们以便获取IJIDispatcher服务。

JIVariant newEnumvariant = wbemObjectSet.get("_NewEnum");
IJIComObject enumComObject = newEnumvariant.getObjectAsComObject();
IJIEnumVariant enumVariant = (IJIEnumVariant) narrowObject(enumComObject.queryInterface(IJIEnumVariant.IID));
 
Object[] elements = enumVariant.next(1);
JIArray aJIArray = (JIArray) elements[0];
 
JIVariant[] array = (JIVariant[]) aJIArray.getArrayInstance();
for (JIVariant variant : array) {
    IJIDispatch wbemObjectDispatch = (IJIDispatch) narrowObject(variant.getObjectAsComObject());
 
    JIVariant returnStatus = wbemObjectDispatch.callMethodA("StopService");
 
    System.out.println(returnStatus.getObjectAsInt());
}

现在，下面的代码显示了一个使用WMI启动和停止Windows服务的完整Java类。

packagecom.wmi.windows;
 
importstaticorg.jinterop.dcom.core.JIProgId.valueOf;
importstaticorg.jinterop.dcom.impls.JIObjectFactory.narrowObject;
importstaticorg.jinterop.dcom.impls.automation.IJIDispatch.IID;
importjava.util.logging.Level;
importorg.jinterop.dcom.common.JIException;
importorg.jinterop.dcom.common.JIRuntimeException;
importorg.jinterop.dcom.common.JISystem;
importorg.jinterop.dcom.core.IJIComObject;
importorg.jinterop.dcom.core.JIArray;
importorg.jinterop.dcom.core.JIComServer;
importorg.jinterop.dcom.core.JISession;
importorg.jinterop.dcom.core.JIString;
importorg.jinterop.dcom.core.JIVariant;
importorg.jinterop.dcom.impls.automation.IJIDispatch;
importorg.jinterop.dcom.impls.automation.IJIEnumVariant;
 
publicclassServiceManager{
 
         privatestaticStringdomainName="";
         privatestaticStringuserName="administrator";
         privatestaticStringpassword="";
         privatestaticStringhostIP="127.0.0.1";
         privatestaticfinalStringwin32_namespace="ROOT\\CIMV2";
 
         privatestaticfinalintSTOP_SERVICE=0;
         privatestaticfinalintSTART_SERVICE=1;
 
         privateJISessiondcomSession=null;
         /**
         *
         *@paramargs
         */
         publicstaticvoidmain(String[]args){
                 ServiceManagermanager=newServiceManager();
                  manager.stopService(domainName,hostIP,userName,password,"MySql");//stopsaservicenamedMySql
         }
         /**
         *Startsagivenserviceifitsstopped.
         *
         *@paramdomainName
         *@paramhostname
         *@paramusername
         *@parampassword
         *@paramserviceName
         */
   publicvoidstartService(StringdomainName,Stringhostname,Stringusername,Stringpassword,StringserviceName){
                 execute(domainName,hostname,username,password,serviceName,START_SERVICE);
         }
         /**
         *Stopsagivenserviceifitsrunning.
         *
         *@paramdomainName
         *@paramhostname
         *@paramusername
         *@parampassword
         *@paramserviceName
         */
    publicvoidstopService(StringdomainName,Stringhostname,Stringusername,Stringpassword,StringserviceName){
                 execute(domainName,hostname,username,password,serviceName,STOP_SERVICE);
         }
         /**
         *Starts/Stopsagivenserviceofremotemachineashostname.
         *
         *@paramdomainName
         *@paramhostname
         *@paramusername
         *@parampassword
         *@paramserviceName
         *@paramaction
         */
 publicvoidexecute(StringdomainName,Stringhostname,Stringusername,Stringpassword,StringserviceName,intaction){
 
                 try{
                          IJIDispatchwbemServices=createCOMServer();
 
                          finalintRETURN_IMMEDIATE=0x10;
                          finalintFORWARD_ONLY=0x20;
                          Object[]params=newObject[]{
                                            newJIString("SELECT*FROMWin32_ServiceWHEREName='"+serviceName+"'"),
                                            JIVariant.OPTIONAL_PARAM(),
                                            newJIVariant(newInteger(RETURN_IMMEDIATE+FORWARD_ONLY))
                          };
                          JIVariant[]servicesSet=wbemServices.callMethodA("ExecQuery",params);
                          IJIDispatchwbemObjectSet=(IJIDispatch)narrowObject(servicesSet[0].getObjectAsComObject());
 
                          JIVariantnewEnumvariant=wbemObjectSet.get("_NewEnum");
                          IJIComObjectenumComObject=newEnumvariant.getObjectAsComObject();
                   IJIEnumVariantenumVariant=(IJIEnumVariant)narrowObject(enumComObject.queryInterface(IJIEnumVariant.IID));
 
                          Object[]elements=enumVariant.next(1);
                          JIArrayaJIArray=(JIArray)elements[0];
 
                          JIVariant[]array=(JIVariant[])aJIArray.getArrayInstance();
                          for(JIVariantvariant:array){
                                   IJIDispatchwbemObjectDispatch=(IJIDispatch)narrowObject(variant.getObjectAsComObject());
 
                                   //Printobjectastext.
                                   JIVariant[]v=wbemObjectDispatch.callMethodA("GetObjectText_",newObject[]{1});
                                   System.out.println(v[0].getObjectAsString().getString());
 
                                   //StartorStoptheservice
                                   StringmethodToInvoke=(action==START_SERVICE)?"StartService":"StopService";
                                   JIVariantreturnStatus=wbemObjectDispatch.callMethodA(methodToInvoke);
                          System.out.println("Returnstatus:"+returnStatus.getObjectAsInt());//ifreturncode=0success.Seemsdnformoredetailsaboutthemethod.
                          }
                 }catch(Exceptione){
                          e.printStackTrace();
                 }finally{
                          if(dcomSession!=null){
                                   try{
                                            JISession.destroySession(dcomSession);
                                   }catch(Exceptionex){
                                            ex.printStackTrace();
                                   }
                          }
                 }
         }
         /**
         *InitializeDCOMsessionandconnecttoSWBEMserviceongivenhostmachine.
         *@return
         */
         privateIJIDispatchcreateCOMServer(){
                 JIComServercomServer;
                 try{
                          JISystem.getLogger().setLevel(Level.WARNING);
                          JISystem.setAutoRegisteration(true);
                          dcomSession=JISession.createSession(domainName,userName,password);
                          dcomSession.useSessionSecurity(false);
                          comServer=newJIComServer(valueOf("WbemScripting.SWbemLocator"),hostIP,dcomSession);
 
                          IJIDispatchwbemLocator=(IJIDispatch)narrowObject(comServer.createInstance().queryInterface(IID));
                          //parameterstoconnecttoWbemScripting.SWbemLocator
                          Object[]params=newObject[]{
                                            newJIString(hostIP),//strServer
                                            newJIString(win32_namespace),//strNamespace
                                            JIVariant.OPTIONAL_PARAM(),//strUser
                                            JIVariant.OPTIONAL_PARAM(),//strPassword
                                            JIVariant.OPTIONAL_PARAM(),//strLocale
                                            JIVariant.OPTIONAL_PARAM(),//strAuthority
                                            newInteger(0),//iSecurityFlags
                                            JIVariant.OPTIONAL_PARAM()//objwbemNamedValueSet
                          };
                          JIVariantresults[]=wbemLocator.callMethodA("ConnectServer",params);
                          IJIDispatchwbemServices=(IJIDispatch)narrowObject(results[0].getObjectAsComObject());
                          returnwbemServices;
                 }catch(JIExceptionjie){
                          System.out.println(jie.getMessage());
                          jie.printStackTrace();
                 }catch(JIRuntimeExceptionjire){
                          jire.printStackTrace();
                 }catch(Exceptione){
                          e.printStackTrace();
                 }finally{
                          if(dcomSession!=null){
                                   try{
                                            JISession.destroySession(dcomSession);
                                   }catch(JIExceptione){
                                            e.printStackTrace();
                                   }
                          }
                 }
                 returnnull;
         }
}

【原文】http://nikunjp.wordpress.com/

评论 (共 5 条评论)
匿名 (219.142.23.106), 362天前

j-interop 远程收集WIN7 的eventlog日志怎么不行啊，求助赵老师

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匿名 (219.142.23.106), 362天前

是啊，win7怎么不行呢。。

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匿名 (59.40.119.215), 384天前

xp的开始Remote Register 服务就可以了。 win7还在研究中

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匿名 (219.133.0.1), 387天前

win7平台为什么会用不了呢？ 我也测试过了，xp的机器可以成功运行。
有些xp的也不行，我觉得可能是有什么配置项没有配置而导致。

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匿名 (111.4.219.247), 609天前

我测试报错：The system cannot find the file specified. win7平台。

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