一共提供了9个接口
//获取RepositoryService
RepositoryService getRepositoryService();
//获取RuntimeService
RuntimeService getRuntimeService();
//获取FormService
FormService getFormService();
//获取TaskService
TaskService getTaskService();
//获取HistoryService
HistoryService getHistoryService();
//获取IdentityService
IdentityService getIdentityService();
//获取ManagementService
ManagementService getManagementService();
//获取DynamicBpmnService
DynamicBpmnService getDynamicBpmnService();
//获取流程引擎配置
ProcessEngineConfiguration getProcessEngineConfiguration();
其中8个接口是用来获取其他Service的，1个接口用来获取流程引擎配置
用引擎获取其他service方法
ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();//获取引擎
DynamicBpmnService dbService = processEngine.getDynamicBpmnService();//获取需要的Service