http://www.kafeitu.me/activiti/2013/03/10/integrate-activiti-modeler.html
1. 为什么要整合
Activiti 5.10版本把原本独立的Activiti Modeler模块整合到了Activiti Explorer中，两者相结合使用起来很方便，通过Modeler设计的流程模型可以直接部署到引擎，也可以把已经部署的流程转换为Model从而在Modeler中编辑。
在实际应用中也有这样的需求，把Modeler整合到业务系统中可以供管理员使用，或者作为BPM平台的一部分存在，很遗憾官方没有给出如何整合Modeler的文档。
2. 整合工作
2.1 下载源码
首先需要从Github下载源码：https://github.com/Activiti/Activiti；可以直接用Git克隆，也可以下载zip格式的压缩包。
2.2 复制文件
复制的所有文件均在activiti-webapp-explorer2目录中。
- src/main/resources中的editor.html、stencilset.json、plugins.xml到项目源码的源码根目录，保证编译之后在classes根目录
- src/main/webapp中的api、editor、explorer、libs到项目的webapp目录（与WEB-INF目录同级）
2.3 添加依赖
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<dependency> <groupid>org.activiti</groupid> <artifactid>activiti-explorer</artifactid> <version>5.14</version> <exclusions> <exclusion> <artifactid>vaadin</artifactid> <groupid>com.vaadin</groupid> </exclusion> <exclusion> <artifactid>dcharts-widget</artifactid> <groupid>org.vaadin.addons</groupid> </exclusion> <exclusion> <artifactid>activiti-simple-workflow</artifactid> <groupid>org.activiti</groupid> </exclusion> </exclusions></dependency><dependency> <groupid>org.activiti</groupid> <artifactid>activiti-modeler</artifactid> <version>5.14</version></dependency> |
2.4 添加Java类
添加一个ExplorerRestApplication.java类保存到项目中，注册了一些REST路由。
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package org.activiti.explorer.rest.application;import org.activiti.editor.rest.application.ModelerServicesInit;import org.activiti.rest.api.DefaultResource;import org.activiti.rest.application.ActivitiRestApplication;import org.activiti.rest.filter.JsonpFilter;import org.restlet.Restlet;import org.restlet.routing.Router;public class ExplorerRestApplication extends ActivitiRestApplication { public ExplorerRestApplication() { super(); } /** * Creates a root Restlet that will receive all incoming calls. */ @Override public synchronized Restlet createInboundRoot() { Router router = new Router(getContext()); router.attachDefault(DefaultResource.class); ModelerServicesInit.attachResources(router); DiagramServicesInit.attachResources(router); JsonpFilter jsonpFilter = new JsonpFilter(getContext()); jsonpFilter.setNext(router); return jsonpFilter; }} |
2.5 配置web.xml
在web.xml文件中添加如下配置：
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<!-- Restlet adapter, used to expose modeler functionality through REST --><servlet> <servlet-name>RestletServlet</servlet-name> <servlet-class>org.restlet.ext.servlet.ServerServlet</servlet-class> <init-param> <!-- Application class name --> <param-name>org.restlet.application</param-name> <param-value>org.activiti.explorer.rest.application.ExplorerRestApplication</param-value> </init-param></servlet><!-- Catch all service requests --><servlet-mapping> <servlet-name>RestletServlet</servlet-name> <url-pattern>/service/*</url-pattern></servlet-mapping> |
2.6 控制器
使用Spring MVC做了一个简单的封装，也可以使用其他的MVC实现。
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package me.kafeitu.demo.activiti.web.workflow;import java.io.ByteArrayInputStream;import java.util.List;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.activiti.bpmn.converter.BpmnXMLConverter;import org.activiti.bpmn.model.BpmnModel;import org.activiti.editor.constants.ModelDataJsonConstants;import org.activiti.editor.language.json.converter.BpmnJsonConverter;import org.activiti.engine.RepositoryService;import org.activiti.engine.repository.Deployment;import org.activiti.engine.repository.Model;import org.apache.commons.io.IOUtils;import org.apache.commons.lang3.StringUtils;import org.codehaus.jackson.JsonNode;import org.codehaus.jackson.map.ObjectMapper;import org.codehaus.jackson.node.ObjectNode;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.PathVariable;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.mvc.support.RedirectAttributes;/** * 流程模型控制器 * * @author henryyan */@Controller@RequestMapping(value = "/workflow/model")public class ModelController { protected Logger logger = LoggerFactory.getLogger(getClass()); @Autowired RepositoryService repositoryService; /** * 模型列表 */ @RequestMapping(value = "list") public ModelAndView modelList() { ModelAndView mav = new ModelAndView("workflow/model-list"); List<model> list = repositoryService.createModelQuery().list(); mav.addObject("list", list); return mav; } /** * 创建模型 */ @RequestMapping(value = "create") public void create(@RequestParam("name") String name, @RequestParam("key") String key, @RequestParam("description") String description, HttpServletRequest request, HttpServletResponse response) { try { ObjectMapper objectMapper = new ObjectMapper(); ObjectNode editorNode = objectMapper.createObjectNode(); editorNode.put("id", "canvas"); editorNode.put("resourceId", "canvas"); ObjectNode stencilSetNode = objectMapper.createObjectNode(); editorNode.put("stencilset", stencilSetNode); Model modelData = repositoryService.newModel(); ObjectNode modelObjectNode = objectMapper.createObjectNode(); modelObjectNode.put(ModelDataJsonConstants.MODEL_NAME, name); modelObjectNode.put(ModelDataJsonConstants.MODEL_REVISION, 1); description = StringUtils.defaultString(description); modelObjectNode.put(ModelDataJsonConstants.MODEL_DESCRIPTION, description); modelData.setMetaInfo(modelObjectNode.toString()); modelData.setName(name); modelData.setKey(StringUtils.defaultString(key)); repositoryService.saveModel(modelData); repositoryService.addModelEditorSource(modelData.getId(), editorNode.toString().getBytes("utf-8")); response.sendRedirect(request.getContextPath() + "/service/editor?id=" + modelData.getId()); } catch (Exception e) { logger.error("创建模型失败：", e); } } /** * 根据Model部署流程 */ @RequestMapping(value = "deploy/{modelId}") public String deploy(@PathVariable("modelId") String modelId, RedirectAttributes redirectAttributes) { try { Model modelData = repositoryService.getModel(modelId); ObjectNode modelNode = (ObjectNode) new ObjectMapper().readTree(repositoryService.getModelEditorSource(modelData.getId())); byte[] bpmnBytes = null; BpmnModel model = new BpmnJsonConverter().convertToBpmnModel(modelNode); bpmnBytes = new BpmnXMLConverter().convertToXML(model); String processName = modelData.getName() + ".bpmn20.xml"; Deployment deployment = repositoryService.createDeployment().name(modelData.getName()).addString(processName, new String(bpmnBytes)).deploy(); redirectAttributes.addFlashAttribute("message", "部署成功，部署ID=" + deployment.getId()); } catch (Exception e) { logger.error("根据模型部署流程失败：modelId={}", modelId, e); } return "redirect:/workflow/model/list"; } /** * 导出model的xml文件 */ @RequestMapping(value = "export/{modelId}") public void export(@PathVariable("modelId") String modelId, HttpServletResponse response) { try { Model modelData = repositoryService.getModel(modelId); BpmnJsonConverter jsonConverter = new BpmnJsonConverter(); JsonNode editorNode = new ObjectMapper().readTree(repositoryService.getModelEditorSource(modelData.getId())); BpmnModel bpmnModel = jsonConverter.convertToBpmnModel(editorNode); 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(); } catch (Exception e) { logger.error("导出model的xml文件失败：modelId={}", modelId, e); } }}</pre>### 2.7 注意事项如果使用Spring代理引擎，并且在项目中同时有activiti.cfg.xml文件（不管在main/resources还是test/resources目录），在activiti.cfg.xml里面的引擎中添加下面的配置参数，否则会导致打开Modeler的编辑页面时读取数据返回**204**状态码。<pre class="brush:xml"><property name="processEngineName" value="test"></property></pre>引擎默认名称为default，ProcessEngines.getDefaultProcessEngine()查询时会先检索main/resources，然后再检索test/resources的activiti.cfg.xml和activiti-context.xml文件，所以当main/resources监测不到指定文件时就会导致该引擎被当做web应用的引擎对象，这样会导致有两个引擎，所以把引擎的名称改为非默认的“default”。## 3. 中文乱码问题解决办法在JVM参数中添加参数：> -Dsun.jnu.encoding=UTF-8 -Dfile.encoding=UTF-8**参考**：[在Activiti Modeler中设计的流程包含奇数个中文时不能部署问题](http://forums.activiti-cn.org/forum.php?mod=viewthread&tid=50&fromuid=2)## 4. 效果截图在最新的kft-activiti-demo版本（1.7.0）中已经集成了Activiti Modeler，可以在线访问，也可以下载源码学习如何配置。登录[http://demo.kafeitu.me/kft-activiti-demo](http://demo.kafeitu.me/kft-activiti-demo)后选择**流程管理**->**模型工作区**菜单项即可。![kft-activiti-demo中的效果截图](/f |