hi，
Thanks for your help, the proble is solved.
I create a jbpm.properties file under the resources directory in my jbpm project.
But when i run my project, an error has occured,like this:
3 17/03 21:45:37,601[main] ERROR drools.persistence.SingleSessionCommandService.rollbackTransaction - Could not commit session
java.lang.IllegalArgumentException: Could not connect task client
at org.jbpm.process.workitem.wsht.CommandBasedWSHumanTaskHandler.connect(CommandBasedWSHumanTaskHandler.java:84)
at org.jbpm.process.workitem.wsht.CommandBasedWSHumanTaskHandler.executeWorkItem(CommandBasedWSHumanTaskHandler.java:97)
at org.drools.persistence.jpa.processinstance.JPAWorkItemManager.internalExecuteWorkItem(JPAWorkItemManager.java:53)
at org.jbpm.workflow.instance.node.WorkItemNodeInstance.internalTrigger(WorkItemNodeInstance.java:105)
at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:122)
at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerConnection(NodeInstanceImpl.java:185)
at org.jbpm.workflow.instance.impl.NodeInstanceImpl.triggerCompleted(NodeInstanceImpl.java:150)
at org.jbpm.workflow.instance.node.StartNodeInstance.triggerCompleted(StartNodeInstance.java:49)
at org.jbpm.workflow.instance.node.StartNodeInstance.internalTrigger(StartNodeInstance.java:41)
at org.jbpm.workflow.instance.impl.NodeInstanceImpl.trigger(NodeInstanceImpl.java:122)
at org.jbpm.ruleflow.instance.RuleFlowProcessInstance.internalStart(RuleFlowProcessInstance.java:35)
at org.jbpm.process.instance.impl.ProcessInstanceImpl.start(ProcessInstanceImpl.java:188)
at org.jbpm.workflow.instance.impl.WorkflowProcessInstanceImpl.start(WorkflowProcessInstanceImpl.java:303)
at org.jbpm.process.instance.ProcessRuntimeImpl.startProcessInstance(ProcessRuntimeImpl.java:168)
at org.jbpm.process.instance.ProcessRuntimeImpl.startProcess(ProcessRuntimeImpl.java:138)
at org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1079)
at org.drools.impl.StatefulKnowledgeSessionImpl.startProcess(StatefulKnowledgeSessionImpl.java:306)
at org.drools.command.runtime.process.StartProcessCommand.execute(StartProcessCommand.java:119)
at org.drools.command.runtime.process.StartProcessCommand.execute(StartProcessCommand.java:38)
at org.drools.command.impl.DefaultCommandService.execute(DefaultCommandService.java:36)
at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:345)
at org.drools.command.impl.CommandBasedStatefulKnowledgeSession.startProcess(CommandBasedStatefulKnowledgeSession.java:223)
at org.drools.command.impl.CommandBasedStatefulKnowledgeSession.startProcess(CommandBasedStatefulKnowledgeSession.java:214)
at com.sample.ProcessMain.main(ProcessMain.java:22)