activiti5.13.1在线流程设计器生成图片中文乱码

最近在学习工作流，在整合在线流程设计器的时候，发现在流程设计器编辑出的模型数据后，部署时生成图片会中文乱码。在这里记录一下我尝试过的方法。

方法一   修改相关源码一：

org.activiti.engine.impl包中的RepositoryServiceImpl类的getModelEditorSource方法

public byte[] getModelEditorSource(String modelId) {
byte[] json_byte= commandExecutor.execute(new GetModelEditorSourceCmd(modelId));
try {
if(!new String(json_byte).startsWith("{")){
json_byte=new BASE64Decoder().decodeBuffer(new String(json_byte));
return json_byte;
}
} catch (IOException e) {
e.printStackTrace();
}
return json_byte;
}

org.activiti.editor.rest.model包中的ModelSaveRestResource类的saveModel方法
public void saveModel(Form modelForm) {
ObjectMapper objectMapper = new ObjectMapper();
String modelId = (String) getRequest().getAttributes().get("modelId");
//System.out.println("json " + modelForm.getFirstValue("json_xml"));

try {

/*ObjectNode modelNode = (ObjectNode) objectMapper.readTree(modelForm.getFirstValue("json_xml"));
JsonToBpmnExport converter = new JsonToBpmnExport(modelNode);
byte[] bpmnBytes = converter.convert();
System.out.println("bpmn " + new String(bpmnBytes));*/

RepositoryService repositoryService = ProcessEngines.getDefaultProcessEngine().getRepositoryService();
Model model = repositoryService.getModel(modelId);

ObjectNode modelJson = (ObjectNode) objectMapper.readTree(model.getMetaInfo());

modelJson.put(MODEL_NAME, modelForm.getFirstValue("name"));
modelJson.put(MODEL_DESCRIPTION, modelForm.getFirstValue("description"));
model.setMetaInfo(modelJson.toString());
model.setName(modelForm.getFirstValue("name"));

repositoryService.saveModel(model);

//转成UTF-8 然后使用base64编码
String gbk=new String(modelForm.getFirstValue("json_xml").getBytes("GBK"));
String iso = new String(gbk.getBytes("UTF-8"),"ISO-8859-1");
String utf8=new String(iso.getBytes("ISO-8859-1"),"UTF-8");
byte[] json_xml=new BASE64Encoder().encode(utf8.getBytes("UTF-8")).getBytes();

repositoryService.addModelEditorSource(model.getId(), json_xml);

InputStream svgStream = new ByteArrayInputStream(modelForm.getFirstValue("svg_xml").getBytes("utf-8"));
TranscoderInput input = new TranscoderInput(svgStream);

PNGTranscoder transcoder = new PNGTranscoder();
// Setup output
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
TranscoderOutput output = new TranscoderOutput(outStream);

// Do the transformation
transcoder.transcode(input, output);
final byte[] result = outStream.toByteArray();
repositoryService.addModelEditorSourceExtra(model.getId(), result);
outStream.close();

} catch(Exception e) {
LOGGER.error("Error saving model", e);
setStatus(Status.SERVER_ERROR_INTERNAL);
}
}

org.activiti.editor.ui包中的EditorProcessDefinitionDetailPanel类的deployModelerModel方法
protected void deployModelerModel(final ObjectNode modelNode) {
try {
BpmnModel model = new BpmnJsonConverter()
.convertToBpmnModel(modelNode);
byte[] bpmnBytes = new BpmnXMLConverter().convertToXML(model);

String bpmnString = new String(bpmnBytes, "UTF-8");

String processName = modelData.getName() + ".bpmn20.xml";
Deployment deployment = repositoryService.createDeployment()
.name(modelData.getName())
.addString(processName, bpmnString)
.deploy();

ExplorerApp.get().getViewManager()
.showDeploymentPage(deployment.getId());
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

方法二    修改源码二：

org.activiti.engine.impl.bpmn.diagram.ProcessDiagramCanvas类中的 activityFontName 和 labelFontName的值为宋体。

方法三     在spring配置文件修改属性

<!-- 流程引擎的配置bean -->
<bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">

<!-- 以下两个属性解决流程图中文乱码 -->
<property name="activityFontName" value="宋体"></property>
<property name="labelFontName" value="宋体"></property>
</bean>

建议使用方法三，本人经过测试方法一和方法二并无效。