activiti 添加流程模型并返回 modelId

/**添加流程模型并返回modelId
   * @param process_id    //流程唯一标识key
   * @param process_author  //流程作者
   * @param name        //流程名称
   * @param modelname     //模型名称
   * @param description     //模型描述
   * @param category      //模型分类
   * @from  fhadmin.cn
   * @throws UnsupportedEncodingException
   */
  protected String createModel(String process_id,String process_author,String name,String modelname,String description,String category) throws UnsupportedEncodingException{
    ObjectMapper objectMapper = new ObjectMapper();
        ObjectNode editorNode = objectMapper.createObjectNode();
        editorNode.put("id", "canvs");
        editorNode.put("resourceId", "canvs");
        ObjectNode stencilSetNode = objectMapper.createObjectNode();
        stencilSetNode.put("namespace", "http://b3mn.org/stencilset/bpmn2.0#");   //命名空间(禁止修改)
        stencilSetNode.put("author", "fhadmin.cn");                     //流程节点作者
        editorNode.set("stencilset", stencilSetNode);
        ObjectNode propertiesNode = objectMapper.createObjectNode();
        propertiesNode.put("process_id",process_id);                //流程唯一标识
        propertiesNode.put("process_author",process_author);            //流程作者
        propertiesNode.put("name",name);                      //流程名称
        editorNode.set("properties", propertiesNode);
        ObjectNode modelObjectNode = objectMapper.createObjectNode();
        modelObjectNode.put("name", modelname);         //模型名称
        modelObjectNode.put("revision", 1);           //模型版本
        modelObjectNode.put("description", description);    //模型描述
    Model modelData = repositoryService.newModel();
    modelData.setCategory(category);            //模型分类
    modelData.setDeploymentId(null);
    modelData.setKey(null);
    modelData.setMetaInfo(modelObjectNode.toString());
    modelData.setName(modelname);             //模型名称
    modelData.setTenantId("");
    modelData.setVersion(1);
    repositoryService.saveModel(modelData);         //保存模型,存储数据到表：act_re_model 流程设计模型部署表
        repositoryService.addModelEditorSource(modelData.getId(), editorNode.toString().getBytes("utf-8"));//保存资源,存储数据到表：act_ge_bytearray 二进制数据表
        return modelData.getId();
  }