图例

环境

软件	版本
SpringBoot	1.5.10
activiti-spring-boot-starter-basic	6.0

生成代码

以下是简化代码：

/**     * 查看实例流程图，根据流程实例ID获取流程图     */    @RequestMapping(value="traceprocess/{instanceId}",method=RequestMethod.GET)    public void traceprocess(HttpServletResponse response,@PathVariable("instanceId")String instanceId) throws Exception{        InputStream in = flowUtils.getResourceDiagramInputStream(instanceId);        ServletOutputStream output = response.getOutputStream();        IOUtils.copy(in, output);    }

Flow 工具类：

/** * Flow 工具类 * @author zhipeng.zhang */@Componentpublic class FlowUtils {        @Autowired    RuntimeService runservice;    @Autowired    private HistoryService historyService;    @Autowired    private RepositoryService repositoryService;    @Autowired    private ProcessEngineFactoryBean processEngine;    /**     * 获取历史节点流程图     * @param id     * @return     */    public  InputStream getResourceDiagramInputStream(String id) {        try {            // 获取历史流程实例            HistoricProcessInstance historicProcessInstance = historyService.createHistoricProcessInstanceQuery().processInstanceId(id).singleResult();            // 获取流程中已经执行的节点，按照执行先后顺序排序            List
    
      historicActivityInstanceList = historyService.createHistoricActivityInstanceQuery().processInstanceId(id).orderByHistoricActivityInstanceId().asc().list();            // 构造已执行的节点ID集合            List
     
       executedActivityIdList = new ArrayList
      
       ();            for (HistoricActivityInstance activityInstance : historicActivityInstanceList) {                executedActivityIdList.add(activityInstance.getActivityId());            }            // 获取bpmnModel            BpmnModel bpmnModel = repositoryService.getBpmnModel(historicProcessInstance.getProcessDefinitionId());            // 获取流程已发生流转的线ID集合            List
       
         flowIds = this.getExecutedFlows(bpmnModel, historicActivityInstanceList);            // 使用默认配置获得流程图表生成器，并生成追踪图片字符流            ProcessDiagramGenerator processDiagramGenerator = processEngine.getProcessEngineConfiguration().getProcessDiagramGenerator();            //你也可以 new 一个            //DefaultProcessDiagramGenerator processDiagramGenerator = new DefaultProcessDiagramGenerator();            InputStream imageStream = processDiagramGenerator.generateDiagram(bpmnModel, "png", executedActivityIdList, flowIds, "宋体", "微软雅黑", "黑体", null, 2.0);            return imageStream;        } catch (Exception e) {            e.printStackTrace();            return null;        }    }        private List
        
          getExecutedFlows(BpmnModel bpmnModel, List
         
           historicActivityInstances) { // 流转线ID集合 List
          
            flowIdList = new ArrayList
           
            (); // 全部活动实例 List
            
              historicFlowNodeList = new LinkedList
             
              (); // 已完成的历史活动节点 List
              
                finishedActivityInstanceList = new LinkedList
               
                (); for (HistoricActivityInstance historicActivityInstance : historicActivityInstances) { historicFlowNodeList.add((FlowNode) bpmnModel.getMainProcess().getFlowElement(historicActivityInstance.getActivityId(), true)); if (historicActivityInstance.getEndTime() != null) { finishedActivityInstanceList.add(historicActivityInstance); } } // 遍历已完成的活动实例，从每个实例的outgoingFlows中找到已执行的 FlowNode currentFlowNode = null; for (HistoricActivityInstance currentActivityInstance : finishedActivityInstanceList) { // 获得当前活动对应的节点信息及outgoingFlows信息 currentFlowNode = (FlowNode) bpmnModel.getMainProcess().getFlowElement(currentActivityInstance.getActivityId(), true); List
                
                  sequenceFlowList = currentFlowNode.getOutgoingFlows(); /** * 遍历outgoingFlows并找到已已流转的 * 满足如下条件认为已已流转： * 1.当前节点是并行网关或包含网关，则通过outgoingFlows能够在历史活动中找到的全部节点均为已流转 * 2.当前节点是以上两种类型之外的，通过outgoingFlows查找到的时间最近的流转节点视为有效流转 */ FlowNode targetFlowNode = null; if (BpmsActivityTypeEnum.PARALLEL_GATEWAY.getType().equals(currentActivityInstance.getActivityType()) || BpmsActivityTypeEnum.INCLUSIVE_GATEWAY.getType().equals(currentActivityInstance.getActivityType())) { // 遍历历史活动节点，找到匹配Flow目标节点的 for (SequenceFlow sequenceFlow : sequenceFlowList) { targetFlowNode = (FlowNode) bpmnModel.getMainProcess().getFlowElement(sequenceFlow.getTargetRef(), true); if (historicFlowNodeList.contains(targetFlowNode)) { flowIdList.add(sequenceFlow.getId()); } } } else { List
                 
                
               
              
             
            
           
          
         
        
       
      
     
    

UtilMisc 工具类：

public class UtilMisc {    public static 
    
      Map
     
       toMap(String name1, V1 value1, String name2, V2 value2) {        return populateMap(new HashMap
      
       (), name1, value1, name2, value2);    }    @SuppressWarnings("unchecked")    private static 
       
         Map
        
          populateMap(Map
         
           map, Object... data) { for (int i = 0; i < data.length;) { map.put((String) data[i++], (V) data[i++]); } return map; }}
         
        
       
      
     
    

工作流枚举类：

/** * 工作流枚举类 * @author zhipeng.zhang */public enum BpmsActivityTypeEnum {        START_EVENT("startEvent", "开始事件"),    END_EVENT("endEvent", "结束事件"),    USER_TASK("userTask", "用户任务"),    EXCLUSIVE_GATEWAY("exclusiveGateway", "排他网关"),    PARALLEL_GATEWAY("parallelGateway", "并行网关"),    INCLUSIVE_GATEWAY("inclusiveGateway", "包含网关");        private String type;    private String name;        private BpmsActivityTypeEnum(String type, String name) {        this.type = type;        this.name = name;    }        public String getType() {        return type;    }    public void setType(String type) {        this.type = type;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }}

浏览器直接发送以下格式请求，就可以查看实时流程图：

# traceprocess 后面追加流程IDhttp://localhost:8080/traceprocess/20190214