activiti 根据模型ID导出、预览 xml文件

/**根据模型ID导出xml文件

* @param response

* @param modelId //模型ID

* @from  fhadmin.cn

*/

protected void exportXmlFromModelId(HttpServletResponse response, String modelId) throws Exception{

Model modelData = repositoryService.getModel(modelId); 

BpmnJsonConverter jsonConverter = new BpmnJsonConverter(); 

ObjectNode modelNode = (ObjectNode) new ObjectMapper().readTree(repositoryService.getModelEditorSource(modelData.getId()));

BpmnModel bpmnModel = jsonConverter.convertToBpmnModel(modelNode); 

BpmnXMLConverter xmlConverter = new BpmnXMLConverter(); 

byte[] bpmnBytes = xmlConverter.convertToXML(bpmnModel); 

ByteArrayInputStream in = new ByteArrayInputStream(bpmnBytes); 

//IOUtils.copy(in, response.getOutputStream()); 

String filename = bpmnModel.getMainProcess().getId() + ".bpmn20.xml"; 

/*response.setHeader("Content-Disposition", "attachment; filename=" + filename); 

response.flushBuffer(); */

FileUpload.copyFile(in,PathUtil.getProjectpath()+Const.FILEACTIVITI,filename); //把文件上传到文件目录里面

FileDownload.fileDownload(response, PathUtil.getProjectpath()+Const.FILEACTIVITI+filename, filename);

in.close();

}

/**根据模型ID预览xml文件

* @param response

* @param modelId //模型ID

* @from  fhadmin.org

*/

protected String viewXmlFromModelId(String modelId) throws Exception{

Model modelData = repositoryService.getModel(modelId); 

BpmnJsonConverter jsonConverter = new BpmnJsonConverter(); 

ObjectNode modelNode = (ObjectNode) new ObjectMapper().readTree(repositoryService.getModelEditorSource(modelData.getId()));

BpmnModel bpmnModel = jsonConverter.convertToBpmnModel(modelNode); 

BpmnXMLConverter xmlConverter = new BpmnXMLConverter(); 

byte[] bpmnBytes = xmlConverter.convertToXML(bpmnModel); 

ByteArrayInputStream in = new ByteArrayInputStream(bpmnBytes); 

InputStreamReader isr = new InputStreamReader(in,"utf-8");

BufferedReader bufferedReader = new BufferedReader(isr);

StringBuffer xmlContent = new StringBuffer();

String lineTxt = null;

while ((lineTxt = bufferedReader.readLine()) != null) {

xmlContent.append(lineTxt);

xmlContent.append("\n");

}

isr.close();

return xmlContent.toString();

}