解决Activiti Modeler 部署中文流程 报错问题

我的Activti 版本是5.13

在画流程图的时候 含有中文的流程图无法部署，看了半天源代码。直接把流程图转成base64来解决。

1.在Modeler 保存流程是调用方法org.activiti.editor.rest.model.ModelSaveRestResource

下面是修改后的完整代码 json_xml传递过来发现是gbk的，这里我转成utf8 然后在进行base64编码。

/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.editor.rest.model;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import org.activiti.editor.constants.ModelDataJsonConstants;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Model;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.PNGTranscoder;
import org.codehaus.jackson.map.ObjectMapper;
import org.codehaus.jackson.node.ObjectNode;
import org.restlet.data.Form;
import org.restlet.data.Status;

import org.restlet.resource.Put;
import org.restlet.resource.ServerResource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import sun.misc.BASE64Encoder;
/**
 * @author Tijs Rademakers
 */
public class ModelSaveRestResource extends ServerResource implements
		ModelDataJsonConstants {

	protected static final Logger LOGGER = LoggerFactory
			.getLogger(ModelSaveRestResource.class);

	@Put
	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"));

					
			byte[] svg_xml=modelForm.getFirstValue("svg_xml").getBytes("UTF-8");
		
			
			//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(svg_xml);
			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();
				
			repositoryService.saveModel(model);
			
		} catch (Exception e) {
			LOGGER.error("Error saving model", e);
			setStatus(Status.SERVER_ERROR_INTERNAL);
		}
	}
}

2.取流程图的时候调用的是 org.activiti.engine.impl.RepositoryServiceImpl 下面是修改后的代码

  public byte[] getModelEditorSource(String modelId) {
        //修改
        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;
  }

3.发布的时候 String又成了默认编码

org.activiti.editor.ui.EditorProcessDefinitionDetailPanel

String bmpnString=new String(bmpnBytes) 改为String bmpnString=new String(bmpnBytes，“utf-8”)

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, new String(bpmnBytes))
		        .addString(processName, bpmnString)
		        .deploy();

		ExplorerApp.get().getViewManager().showDeploymentPage(deployment.getId());
	} catch (UnsupportedEncodingException e) {
		LOGGER.debug("发布流程xml编码错误");
		e.printStackTrace();
	}
  }

下面是我部署的含有中文的流程