activiti7.1.0.m6java代码导入、导出流程

可以使用 Activiti 提供的 API 进行流程的导入和导出，具体实现步骤如下：

1. 导出流程

public void exportProcess(String processDefinitionId, HttpServletResponse response) throws Exception {
    ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().processDefinitionId(processDefinitionId).singleResult();
    InputStream bpmnStream = repositoryService.getResourceAsStream(processDefinition.getDeploymentId(), processDefinition.getResourceName());
    byte[] buffer = new byte[bpmnStream.available()];
    bpmnStream.read(buffer);
    bpmnStream.close();
    ByteArrayInputStream in = new ByteArrayInputStream(buffer);
    IOUtils.copy(in, response.getOutputStream());
    response.setContentType("application/octet-stream");
    response.setHeader("Content-Disposition", "attachment; filename=" + processDefinition.getResourceName());
    response.flushBuffer();
}

2. 导入流程

public void importProcess(MultipartFile file) throws Exception {
    InputStream inputStream = file.getInputStream();
    Deployment deployment = repositoryService.createDeployment().addInputStream(file.getOriginalFilename(), inputStream).deploy();
    ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId(deployment.getId()).singleResult();
    repositoryService.addCandidateStarterUser(processDefinition.getId(), "userId");
}

其中，`exportProcess` 方法用于导出指定流程定义的 BPMN 文件，`importProcess` 方法用于将上传的 BPMN 文件部署到 Activiti 中。需要注意的是，在导入流程时，需要为流程定义指定候选用户或组，以便在启动流程时能够选择合适的用户或组。