/**查询流程定义**/
@Test
public void findProcess(){
    /***act_re_procdef 流程定义表 **/
    ProcessDefinition processDefinition = processEngine.getRepositoryService()
                        .createProcessDefinitionQuery()//创建一个流程定义查询
                        .deploymentId("2501")//部署对象deployment_id查询
            //			.processDefinitionId("myProcess_1:1:4")//流程定义ID查询
            //			.processDefinitionKey()//根据Key查询，返回集合

            //			.list();//集合
                        .singleResult();//单个对象
            //			.count();//count

    System.out.println(processDefinition.getCategory());
    System.out.println(processDefinition.getName()); //对应.bpmn中的name属性值
	processDefinition.getKey();//对应.bpmn中的id属性值
}

/**删除流程定义**/
	@Test
	public void deleteProcess() {
		String deploymentId = "1";
		processEngine.getRepositoryService()
				//.deleteDeployment(deploymentId);//不带级联的删除,只能删除没有启动的流程，
                //如果流程启动，就会抛出异常
				.deleteDeployment(deploymentId,true);//级联删除，启动也能删除
	}

/**查看流程图**/
	@Test
	public void viewPic()throws Exception{
		String deploymentId = "2501";//act_ge_bytearray 的deploymentId值
		String name = "diagrams/hello.png"; //act_ge_bytearray 的name值
		/**将生成文件放到文件夹下**/
		InputStream in = processEngine.getRepositoryService()
				.getResourceAsStream(deploymentId, name);
		/**写入D盘下**/
		File file = new File("D:/"+name);
        //commons-io jar
        FileUtils.copyInputStreamToFile(in,file);
	}

/**查询最新版本的流程定义**/
@Test
public void findLastVersion(){
/***act_re_procdef key相同的最新version **/
List<ProcessDefinition> list = processEngine.getRepositoryService()
                                    .createProcessDefinitionQuery()
                                    .orderByProcessDefinitionVersion()//version
                                    .asc()//使用流程定义的升序排序
                                    .list();

Map<String,ProcessDefinition> processDefinitionMap = new LinkedHashMap<>();
if (!CollectionUtils.isEmpty(list)){
    for (ProcessDefinition pd : list) {
        processDefinitionMap.put(pd.getKey(),pd);
    }
}
List<ProcessDefinition> arrayList = new ArrayList<>(processDefinitionMap.values());
for (ProcessDefinition processDefinition : arrayList) {
    System.out.println(processDefinition.getId());
}
}

 /**删除key相同的不同版本流程定义**/
@Test
public void deleteByKey(){
    /***act_re_procdef key相同的最新**/
    List<ProcessDefinition> list = processEngine.getRepositoryService()
                                    .createProcessDefinitionQuery()
                                    .processDefinitionKey("key")
                                    .list();
    if (!CollectionUtils.isEmpty(list)){
        for (ProcessDefinition pd : list) {
            String deploymentId = pd.getDeploymentId();
            processEngine.getRepositoryService().deleteDeployment(deploymentId,true);
        }
    }
}