@Autowired
private ProcessEngine processEngine;@Autowired
private ModelService modelService;
//核心代码块
Model model = modelService.getModel(modelId);
ObjectMapper mapper = new ObjectMapper();JsonNode jsonNode = mapper.readTree(model.getModelEditorJson());BpmnModel bpmnModel = new BpmnJsonConverter().convertToBpmnModel(jsonNode);byte[] bpmnBytes = new BpmnXMLConverter().convertToXML(bpmnModel);String processName = "*.bpmn20.xml";Deployment deployment = processEngine.getRepositoryService().createDeployment().addString(processName, new String(bpmnBytes,"UTF-8")).name(model.getName()).key(model.getKey()).category("").tenantId(appid).deploy();org.activiti.engine.repository.Model repModel = processEngine.getRepositoryService().newModel();repModel.setKey(model.getKey());repModel.setName(model.getName());repModel.setDeploymentId(deployment.getId());repModel.setTenantId(appid);processEngine.getRepositoryService().saveModel(repModel);