ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
	
	/**部署流程定义（从inputStream）*/
	@Test
	public void deploymentProcessDefinition_inputStream(){
		InputStream inputStreamBpmn = this.getClass().getResourceAsStream("start.bpmn");
		InputStream inputStreamPng = this.getClass().getResourceAsStream("start.png");
		Deployment deployment = processEngine.getRepositoryService()//与流程定义和部署对象相关的Service
						.createDeployment()//创建一个部署对象
						.name("开始活动")//添加部署的名称
						.addInputStream("start.bpmn", inputStreamBpmn)//
						.addInputStream("start.png", inputStreamPng)//
						.deploy();//完成部署
		System.out.println("部署ID："+deployment.getId());//
		System.out.println("部署名称："+deployment.getName());//
	}
	
	/**启动流程实例+判断流程是否结束+查询历史*/
	@Test
	public void startProcessInstance(){
		//流程定义的key
		String processDefinitionKey = "start";
		ProcessInstance pi = processEngine.getRuntimeService()//与正在执行的流程实例和执行对象相关的Service
						.startProcessInstanceByKey(processDefinitionKey);//使用流程定义的key启动流程实例，key对应helloworld.bpmn文件中id的属性值，使用key值启动，默认是按照最新版本的流程定义启动
		System.out.println("流程实例ID:"+pi.getId());//流程实例ID    101
		System.out.println("流程定义ID:"+pi.getProcessDefinitionId());//流程定义ID   helloworld:1:4
		
		/**判断流程是否结束，查询正在执行的执行对象表*/
		ProcessInstance rpi = processEngine.getRuntimeService()//
						.createProcessInstanceQuery()//创建流程实例查询对象
						.processInstanceId(pi.getId())
						.singleResult();
		//说明流程实例结束了
		if(rpi==null){
			/**查询历史，获取流程的相关信息*/
			HistoricProcessInstance hpi = processEngine.getHistoryService()//
						.createHistoricProcessInstanceQuery()//
						.processInstanceId(pi.getId())//使用流程实例ID查询
						.singleResult();
			System.out.println(hpi.getId()+"    "+hpi.getStartTime()+"   "+hpi.getEndTime()+"   "+hpi.getDurationInMillis());
		}
	}
	

3、总结