一、实现效果

前端使用LogicFlow框架绘制流程图，可以导出为xml工作流标准格式数据，通过xml文件传递到后端进行Flowable流程注册，并保存到数据库中。

二、BPM传输文件格式（.xml）

如需添加承办人的话，需要在LogicFlow导出文件的基础上手动添加xmlns:flowable="http://flowable.org/bpmn"flowable插件，不然后台无法识别flowable:candidateUsers。

<bpmn:definitions xmlns:flowable="http://flowable.org/bpmn" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" id="Definitions_5588fe5_6" targetNamespace="http://logic-flow.org" exporter="logicflow" exporterVersion="1.2.0">	
  <bpmn:process isExecutable="true" id="Process_2a9c067_6">	
    <bpmn:startEvent id="Event_14efe0e" name="开始节点" flowable:candidateUsers="admin,admin1,admin2">	
      <bpmn:outgoing>Flow_a3e7d0c</bpmn:outgoing>	
    </bpmn:startEvent>	
    <bpmn:userTask id="Activity_602107f" name="普通节点" flowable:candidateUsers="uesr,uesr1,uesr2">	
      <bpmn:incoming>Flow_a3e7d0c</bpmn:incoming>	
      <bpmn:outgoing>Flow_3f9a386</bpmn:outgoing>	
    </bpmn:userTask>	
    <bpmn:endEvent id="Event_49a11b4" name="结束节点">	
      <bpmn:incoming>Flow_3f9a386</bpmn:incoming>	
    </bpmn:endEvent>	
      <bpmn:sequenceFlow id="Flow_a3e7d0c" sourceRef="Event_14efe0e" targetRef="Activity_602107f"/>	
      <bpmn:sequenceFlow id="Flow_3f9a386" sourceRef="Activity_602107f" targetRef="Event_49a11b4"/>	
  </bpmn:process>	
  <bpmndi:BPMNDiagram id="BPMNDiagram_1">	
    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Process_2a9c067">	
        <bpmndi:BPMNEdge id="Flow_a3e7d0c_di" bpmnElement="Flow_a3e7d0c">	
            <di:waypoint x="343" y="164"/>	
            <di:waypoint x="448" y="164"/>	
        </bpmndi:BPMNEdge>	
        <bpmndi:BPMNEdge id="Flow_3f9a386_di" bpmnElement="Flow_3f9a386">	
            <di:waypoint x="548" y="164"/>	
            <di:waypoint x="665" y="164"/>	
        </bpmndi:BPMNEdge>	
        <bpmndi:BPMNShape id="Event_14efe0e_di" bpmnElement="Event_14efe0e">	
          <dc:Bounds x="305" y="144" width="40" height="40"/>	
          <bpmndi:BPMNLabel>	
            <dc:Bounds x="305" y="197" width="40" height="14"/>	
          </bpmndi:BPMNLabel>	
        </bpmndi:BPMNShape>	
        <bpmndi:BPMNShape id="Activity_602107f_di" bpmnElement="Activity_602107f">	
          <dc:Bounds x="448" y="124" width="100" height="80"/>	
          <bpmndi:BPMNLabel>	
            <dc:Bounds x="478" y="157" width="40" height="14"/>	
          </bpmndi:BPMNLabel>	
        </bpmndi:BPMNShape>	
        <bpmndi:BPMNShape id="Event_49a11b4_di" bpmnElement="Event_49a11b4">	
          <dc:Bounds x="663" y="144" width="40" height="40"/>	
          <bpmndi:BPMNLabel>	
            <dc:Bounds x="663" y="197" width="40" height="14"/>	
          </bpmndi:BPMNLabel>	
        </bpmndi:BPMNShape>	
    </bpmndi:BPMNPlane>	
  </bpmndi:BPMNDiagram>	
</bpmn:definitions>

三、前端框架（LogicFlow）

1. LogicFlow.vue

<template>
    <div class="container" ref="container"></div>
    <BpmnNodePanel :lf="lf"></BpmnNodePanel>
    <div class="node-item">
      <div class="node-item-icon bpmn-save" @click="saveNode()"></div>
      <span class="node-label">保存</span>
      <div class="node-item-icon bpmn-save" @click="cleanNode()"></div>
      <span class="node-label">清空</span>
      <div class="node-item-icon bpmn-save" @click="reloadNode()"></div>
      <span class="node-label">加载</span>
      <div class="node-item-icon bpmn-save" @click="deleteNode()"></div>
      <span class="node-label">删除</span>
      <div class="node-item-icon bpmn-save" @click="getList()"></div>
      <span class="node-label">获取定义流程</span>
      <div class="node-item-icon bpmn-save" @click="flowRun()"></div>
      <span class="node-label">工作流实例</span>
    </div>
</template>
<script>
import LogicFlow from '@logicflow/core'
import '@logicflow/core/dist/style/index.css'
import { BpmnElement, BpmnXmlAdapter, Menu } from '@logicflow/extension'
import '@logicflow/extension/lib/style/index.css'
import BpmnNodePanel from "./BpmnNodePanel.vue"
import { addFlow, infoFlow, deleteFlow, getDeployList, flowRun } from "../api/server"
import { addFlowable, addProp, getTypeNameByTag, setValueByTag } from '../utils/xml'

export default {
    data() {
        return {
            lf: void 0,
            xmlData: void 0,
            definitionsId: void 0,
            processId: void 0,
        }
    },
    components: { BpmnNodePanel },
    created() {},
    mounted() {
        this.loadFlow()
    },
    methods: {
        loadFlow() {
            LogicFlow.use(BpmnElement)
            LogicFlow.use(BpmnXmlAdapter)
            LogicFlow.use(Menu)

            //初始化
            this.lf = new LogicFlow({
                container: this.$refs.container,
                stopScrollGraph: true,
                stopZoomGraph: true,
                grid: false,
                keyboard: {
                    enabled: true,
                },
            });
            // this.lf.setDefaultEdgeType('bezier')
            this.lf.render();
        },
        // 保存
        saveNode() { 
            // 获取xml数据
            this.xmlData = this.lf.getGraphData();

            // 添加flowable扩展
            this.xmlData = addFlowable(this.xmlData)

            // 判断是否为文档编辑
            if (this.processId) {
                // 修改为原流程id
                this.xmlData = setValueByTag(this.xmlData, 'bpmn:definitions', 'id', this.definitionsId)
                this.xmlData = setValueByTag(this.xmlData, 'bpmn:process', 'id', this.processId)
            } else { 
                // 添加节点用户 个人assignee  候选人candidateUsers 候选组候选人candidateGroups 动态设置${employee}
                // this.xmlData = addProp(this.xmlData, 'bpmn:startEvent', 'flowable:candidateUsers', 'zhao,qian,sun')
                this.xmlData = addProp(this.xmlData, 'bpmn:userTask', 'flowable:candidateUsers', 'li,zhou,wang')
            }

            const data = {
                name: '测试流程',
                xml: this.xmlData
            }
            
            // 请求后台接口（添加工作流）
            addFlow(data)
                .then(res => {
                    console.log(res)
                })
                .catch(err => {
                    console.log(err)
                })
        },
        // 清除
        cleanNode() {
            this.lf.clearData()
        },
        // 重新加载
        reloadNode() {
            // 查询数据
            const data = {
                id: 'ff292b5d-4193-11ee-8e48-502b73dc5fce',
                name: '测试流程'
            }
            infoFlow(data)
                .then(res => {
                    if (res.result) {
                        // 获取processId
                        const definitionsNodes = getTypeNameByTag(res.result, 'bpmn:definitions')
                        const processNodes = getTypeNameByTag(res.result, 'bpmn:process')
                        this.definitionsId = definitionsNodes.id
                        this.processId = processNodes.id
                        // 渲染数据
                        this.lf.render(res.result);
                    }
                    console.log(res)
                })
                .catch(err => {
                    console.log(err)
                })
        },
        // 删除数据
        deleteNode() { 
            // 查询数据
            const data = {
                id: ''
            }
            deleteFlow(data)
                .then(res => {
                    console.log(res)
                })
                .catch(err => {
                    console.log(err)
                })
        }, 
        // 获取数据
        getList() { 
            getDeployList()
                .then(res => {
                    console.log(res)
                })
                .catch(err => {
                    console.log(err)
                })
        },
        // 流程实例
        flowRun() { 
            flowRun()
                .then(res => {
                    console.log(res)
                })
                .catch(err => {
                    console.log(err)
                })
        },
    },
}
</script>
<style scoped>
.container{
    width: 100%;
    height: 100%;
}

.node-item {
  position: absolute;
  top: 350px;
  left: 10px;
  width: 50px;
  padding: 10px;
  background-color: white;
  box-shadow: 0 0 10px 1px rgb(228, 224, 219);
  border-radius: 6px;
  text-align: center;
  z-index: 101;
}
.node-item-icon {
  width: 30px;
  height: 30px;
  margin-left: 10px;
  background-size: cover;
}
.node-label {
  font-size: 12px;
  margin-top: 5px;
  user-select: none;
}

.bpmn-save {
  background: url(data:image/png;base64,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)
    center center no-repeat;
  cursor: grab;
}
</style>

2.BpmnNodePanel.vue

<template>
  <div class="node-panel">
    <!-- <div class="node-item" @mousedown="openSelection()">
      <div class="node-item-icon bpmn-selection"></div>
      <span class="node-label">选区</span>
    </div> -->
    <div class="node-item" @mousedown="addStartNode()">
      <div class="node-item-icon bpmn-start"></div>
      <span class="node-label">开始节点</span>
    </div>
    <div class="node-item" @mousedown="addUserTask()">
      <div class="node-item-icon bpmn-user"></div>
      <span class="node-label">普通节点</span>
    </div>
    <!-- <div class="node-item" @mousedown="addServiceTask()">
      <div class="node-item-icon bpmn-service"></div>
      <span class="node-label">系统</span>
    </div> -->
    <!-- <div class="node-item" @mousedown="addGateWay()">
      <div class="node-item-icon bpmn-gateway"></div>
      <span class="node-label">判断</span>
    </div> -->
    <div class="node-item" @mousedown="addEndNode()">
      <div class="node-item-icon bpmn-end"></div>
      <span class="node-label">结束节点</span>
    </div>
  </div>
</template>
<script>
import LogicFlow from '@logicflow/core';
export default {
  name: "BpmnNodePanel",
  data() {
    return {}
  },
  props: {
    lf: Object,
  },

  mounted() {
    //选区框选使用的
    let lf = this.$props.lf
    lf &&
      lf.on("selection:selected", () => {
          lf.updateEditConfig({
          stopMoveGraph: false,
        });
      });
  },
  methods: {
    openSelection() {
      (this.$props.lf).updateEditConfig({
        stopMoveGraph: true
      });
    },
    addStartNode() {
      (this.$props.lf).dnd.startDrag({
        type: "bpmn:startEvent",
        text: "开始节点",
      });
    },
    addUserTask() {
      (this.$props.lf).dnd.startDrag({
        type: "bpmn:userTask",
        text: "普通节点", 
      });
    },
    addServiceTask() {
      (this.$props.lf).dnd.startDrag({
        type: "bpmn:serviceTask",
        text: "系统",
      });
    },
    addGateWay() {
      (this.$props.lf).dnd.startDrag({
        type: "bpmn:exclusiveGateway",
        text: "判断",
      });
    },
    addEndNode() {
      (this.$props.lf).dnd.startDrag({
        type: "bpmn:endEvent",
        text: "结束节点",
      });
    },
  },
};
</script>
<style>
.node-panel {
  position: absolute;
  top: 100px;
  left: 10px;
  width: 50px;
  padding: 10px;
  background-color: white;
  box-shadow: 0 0 10px 1px rgb(228, 224, 219);
  border-radius: 6px;
  text-align: center;
  z-index: 101;
}
.node-item {
  margin-bottom: 10px;
}
.node-item-icon {
  width: 30px;
  height: 30px;
  margin-left: 10px;
  background-size: cover;
}
.node-label {
  font-size: 12px;
  margin-top: 5px;
  user-select: none;
}

.bpmn-selection {
  background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAAH6ji2bAAAABGdBTUEAALGPC/xhBQAAAOVJREFUOBGtVMENwzAIjKP++2026ETdpv10iy7WFbqFyyW6GBywLCv5gI+Dw2Bluj1znuSjhb99Gkn6QILDY2imo60p8nsnc9bEo3+QJ+AKHfMdZHnl78wyTnyHZD53Zzx73MRSgYvnqgCUHj6gwdck7Zsp1VOrz0Uz8NbKunzAW+Gu4fYW28bUYutYlzSa7B84Fh7d1kjLwhcSdYAYrdkMQVpsBr5XgDGuXwQfQr0y9zwLda+DUYXLaGKdd2ZTtvbolaO87pdo24hP7ov16N0zArH1ur3iwJpXxm+v7oAJNR4JEP8DoAuSFEkYH7cAAAAASUVORK5CYII=)
    center center no-repeat;
  cursor: grab;
}

.bpmn-start {
  background: url(data:image/png;base64,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)
    center center no-repeat;
  cursor: grab;
}
.bpmn-end {
  background: url(data:image/png;base64,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)
    center center no-repeat;
  cursor: grab;
}
.bpmn-user {
  background: url(data:image/png;base64,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)
    center center no-repeat;
  cursor: grab;
}
.bpmn-gateway {
  background: url(data:image/png;base64,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)
    center center no-repeat;
  cursor: grab;
}

.bpmn-service {
  background: url(data:image/png;base64,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)
    center center no-repeat;
  cursor: grab;
}
</style>

3.xml.js

/**
 * 添加flowable扩展
 * @param {*} xmlstr 
 * @returns 
 */
export function addFlowable(xmlstr) {
    const part1 = xmlstr.slice(0, 43); // 从开头到指定位置之前的部分
    const part2 = xmlstr.slice(43); // 从指定位置到末尾的部分
    const newString = part1 + 'xmlns:flowable="http://flowable.org/bpmn" ' + part2; // 拼接成新的字符串
    
    return newString
}

/**
 * 添加属性信息
 * @param {*} xmlstr 
 * @returns 
 */
export function addProp(xmlstr, Elements, key, value) {
    // 创建一个XML文档对象
    const parser = new DOMParser();
    const xmlDoc = parser.parseFromString(xmlstr, 'application/xml');

    // 查找元素
    const userTaskElement = xmlDoc.getElementsByTagName(Elements);
    for (let i = 0; i < userTaskElement.length; i++) {
        if (!userTaskElement[i].attributes[key]) {
            userTaskElement[i].setAttribute(key, value);
        }
    }

    // 将修改后的XML文档转换回字符串
    const xmlSerializer = new XMLSerializer();
    const modifiedXmlString = xmlSerializer.serializeToString(xmlDoc);

    return modifiedXmlString;
}

/**
 *根据标签名称返回xml内容，标签名必须唯一，若不满足，修改方法
 * @param {*} xmlstr xml字符串
 * @param {element} tagName 标签名称，如<Name>
 */
export function getTypeNameByTag(xmlstr, tagName) {
    const parser = new DOMParser()
    const xmlDoc = parser.parseFromString(xmlstr, 'application/xml')
    const nameNodes = xmlDoc.getElementsByTagName(tagName)[0]
    if (nameNodes) {
        return nameNodes
    } else {
        return false
    }
}

/**
 * 根据标签名称修改内容
 * @param {*} xmlstr xml字符串
 * @param {element} tagName 标签名称，如<Name>
 * @param {*} key 修改对应key
 * @param {*} value 修改值value
 * @returns 
 */
export function setValueByTag(xmlstr, tagName, key, value) {
    // 字符串转xml
    const parser = new DOMParser()
    const xmlDoc = parser.parseFromString(xmlstr, 'application/xml')
    const nameNodes = xmlDoc.getElementsByTagName(tagName)[0]
    nameNodes.setAttribute(key, value);
    // xml转字符串
    const s = new XMLSerializer();
    const xml = s.serializeToString(xmlDoc);

    return xml;
}

4.server.js

import request from '../utils/request';
const url = 'http://localhost:8088'

/**
 * 添加（编辑）工作流
 * @param {*} data
 * @returns
 */
export function addFlow(data) {
    return request({
        url: url + '/flow/addFlow',
        method: 'post',
        data,
    });
}

/**
 * 查询工作流
 * @param {*} data
 * @returns
 */
export function infoFlow(data) {
    return request({
        url: url + '/flow/infoFlow',
        method: 'post',
        data,
    });
}

/**
 * 删除工作流
 * @param {*} data
 * @returns
 */
export function deleteFlow(data) {
    return request({
        url: url + '/flow/deleteFlow',
        method: 'post',
        data,
    });
}

/**
 * 获取工作流定义
 * @param {*} data
 * @returns
 */
export function getDeployList(data) {
    return request({
        url: url + '/flow/getDeployList',
        method: 'post',
        data,
    });
}

/**
 * 工作流实例
 * @param {*} data
 * @returns
 */
export function flowRun(data) {
    return request({
        url: url + '/flow/deploymentRun',
        method: 'post',
        data,
    });
}

5.request.js

import axios from 'axios';
const service = axios.create({});
service.defaults.timeout = 20000;
// 请求拦截器
service.interceptors.request.use(
    (config) => {
        return config;
    },
    (error) => {
        console.log(error);
        return Promise.reject(error);
    }
);
// 响应拦截器
service.interceptors.response.use(
    (response) => {
        return response.data;
    },
    (error) => {
        return Promise.reject(error);
    }
);

export default service;

四、后端代码（Flowable）

1.FlowController .java

@RestController
public class FlowController {
    @Autowired
    FlowService flowService;

    // 工作流部署（添加、编辑）
    @CrossOrigin
    @PostMapping("/flow/addFlow")
    public Result addFlow(@RequestBody Map<String,String> map){
        return flowService.AddFlow(map.get("id"), map.get("name"), map.get("xml"), map.get("key"));
    }

    // 工作流返回
    @CrossOrigin
    @PostMapping("/flow/infoFlow")
    public Result infoFlow(@RequestBody Map<String,String> map) {
        return flowService.InfoFlow(map.get("id"), map.get("name"));
    }

    // 工作流删除
    @CrossOrigin
    @PostMapping("/flow/deleteFlow")
    public Result deleteFlow(@RequestBody Map<String,String> map) {
        return flowService.DeleteFlow(map.get("id"));
    }

    // 工作流查询
    @CrossOrigin
    @PostMapping("/flow/getDeployList")
    public Result getDeployList() {
        return flowService.GetDeployList();
    }

    // 流程实例
    @CrossOrigin
    @PostMapping("/flow/deploymentRun")
    public Result deploymentRun(@RequestBody Map<String,String> map) {
        return flowService.DeploymentRun(map.get("userId"), map.get("key"));
    }

    // 流程查询
    @CrossOrigin
    @PostMapping("/flow/infoTask")
    public Result InfoTask(@RequestBody Map<String,String> map) {
        return flowService.InfoTask(map.get("userId"));
    }

    // 流程执行
    @CrossOrigin
    @PostMapping("/flow/makeTask")
    public Result MakeTask(@RequestBody Map<String,String> map) {
        return flowService.MakeTask(map.get("userId"));
    }

    // 流程历史
    @CrossOrigin
    @PostMapping("/flow/taskHistory")
    public Result TaskHistory() {
        return flowService.TaskHistory();
    }

    // 测试
    @CrossOrigin
    @PostMapping("/test")
    public Result test(@RequestBody AskForLeaveVO test) {
        return flowService.test(test);
    }


}

2.FlowService .java

@Service
public class FlowService {
    @Autowired
    ProcessEngine processEngine;
    @Autowired
    FlowTreeService flowTreeService;

    /**
     * 工作流部署（添加、编辑）
     * @param name 名称
     * @param xml xml
     * @return
     */
    @Transactional
    public Result AddFlow(String id, String name, String xml, String key){
        try {
            RepositoryService repositoryService = processEngine.getRepositoryService();
            // 创建新流程
            Deployment deployment = repositoryService.createDeployment()
                    .addString(name + ".bpmn", xml)
                    .deploy();

            // 将工作流信息保存到流程树表
            flowTreeService.AutoSave(id, deployment.getId(), key);
            System.out.println("id : " + id);
            System.out.println("添加id : " + deployment.getId());
            System.out.println("添加key : " + key);
            return Result.ok("添加成功", deployment.getId());

        } catch (Exception e) {
            e.printStackTrace();
            return Result.error("添加失败");
        }
    }

    /**
     * 工作流返回（返回xml）
     * @param id 查询id
     * @param name 名称
     * @return
     */
    @Transactional
    public Result InfoFlow(String id, String name) {
        try {
            // 流程查询
            RepositoryService repositoryService = processEngine.getRepositoryService();
            InputStream resourceAsStream = repositoryService.getResourceAsStream(id, name + ".bpmn");
            // Java流转String
            String resultXml = new BufferedReader(new InputStreamReader(resourceAsStream,"utf-8"))
                    .lines().collect(Collectors.joining(System.lineSeparator()));

            return Result.ok("查询成功", resultXml);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return Result.error("查询失败");
    }

    /**
     * 工作流删除
     * @param id
     * @return
     */
    @Transactional
    public  Result DeleteFlow(String id){
        try {
            RepositoryService repositoryService = processEngine.getRepositoryService();
            // 设置为TRUE 级联删除流程定义，及时流程有实例启动，也可以删除，设置为false 非级联删除操作。
            repositoryService.deleteDeployment(id);
            System.out.println("删除id : " + id);
            return Result.ok("删除成功", id);
        } catch (Exception e) {
            e.printStackTrace();
            return Result.error("删除失败");
        }
    }

    /**
     * 工作流部署列表查询
     * @return
     */
    @Transactional
    public Result GetDeployList() {
        try {
            RepositoryService repositoryService = processEngine.getRepositoryService();
            List<ProcessDefinition> list = repositoryService.createProcessDefinitionQuery().list();
            System.out.println("list : " + list);
            return Result.ok("查询成功");
        } catch (Exception e) {
            e.printStackTrace();
            return Result.error("查询失败");
        }
    }

    /**
     * 启动流程实例
     * @param userId 发起人
     * @param key 流程key
     * @return
     */
    @Transactional
    public Result DeploymentRun(String userId, String key){
        try {
//          Map<String, Object> variables = new HashMap<String, Object>();
//          variables.put("employee", userId);

            RuntimeService runtimeService = processEngine.getRuntimeService();
            ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(key);
            //获取流程实例的相关信息
            System.out.println("流程定义的id = " + processInstance.getProcessDefinitionId());
            System.out.println("流程实例的id = " + processInstance.getId());
            return Result.ok("成功", "流程实例id = " + processInstance.getId());
        } catch (Exception e) {
            e.printStackTrace();
            return Result.error("失败");
        }
    }

    /**
     * 查询流程任务
     * @param userId
     * @return
     */
    @Transactional
    public Result InfoTask(String userId){
        try {
            TaskService taskService = processEngine.getTaskService();
            // 查询多人任务
            List<Task> taskList = taskService.createTaskQuery().taskCandidateUser(userId).list();
            System.out.println("taskList" + taskList);
            //遍历任务列表
            for(Task task:taskList){
                System.out.println("流程定义id = " + task.getProcessDefinitionId());
                System.out.println("流程实例id = " + task.getProcessInstanceId());
                System.out.println("任务id = " + task.getId());
                System.out.println("任务名称 = " + task.getName());
            }
            return Result.ok("成功");
        } catch (Exception e) {
            e.printStackTrace();
            return Result.error("失败");
        }
    }

    /**
     * 执行流程任务
     * @param userId
     * @return
     */
    @Transactional
    public Result MakeTask(String userId){
        try {
            TaskService taskService = processEngine.getTaskService();
            // 查询个人任务
            List<Task> list = taskService.createTaskQuery().taskCandidateUser(userId).list();
            System.out.println("taskList" + list);
            for (Task task : list) {
                taskService.complete(task.getId());
                System.out.println("task.getId()" + task.getId());
            }
            return Result.ok("成功");
        } catch (Exception e) {
            e.printStackTrace();
            return Result.error("失败");
        }
    }

    /**
     * 查询历史流程
     * @param
     * @return
     */
    @Transactional
    public Result TaskHistory(){
        try {
            HistoryService historyService = processEngine.getHistoryService();
            List<HistoricActivityInstance> activities = historyService.createHistoricActivityInstanceQuery()
                    // .processInstanceId("12501") // 特定的实例
                    .finished() // 完成的
                            // .orderByHistoricActivityInstanceEndTime().asc() // 根据实例完成时间升序排列
                    .list();

            for (HistoricActivityInstance activity : activities) {
                System.out.println("id:" + activity.getActivityId() + "  任务名：" + activity.getActivityName() + "  类型：" + activity.getActivityType() + "  持续时间:" + activity.getDurationInMillis());
            }
            return Result.ok("成功");
        } catch (Exception e) {
            e.printStackTrace();
            return Result.error("失败");
        }
    }
}