更多nbcio-boot功能请看演示系统
gitee源代码地址
后端代码： https://gitee.com/nbacheng/nbcio-boot
前端代码：https://gitee.com/nbacheng/nbcio-vue.git
在线演示（包括H5） ： http://122.227.135.243:9888
今天我们实现nbcio-boot的flowable的流程加签功能。
一、加签的几个概念
1、向前加签
任务在 A 这里，A 这个时候需要 B 核对一下，等 B 核对之后又回到 A 这里，这时 A 才能继续自己的任务
2、向后加签
任务在 A 这里，A 这个时候需要 B 处理这个事情，处理完毕之后就不用管了，继续后面的审批环节
3、多实例加签
任务只能对多实例任务进行加签，其它无效
二、前端实现
界面代码如下：
<!--加签流程--><a-modal :z-index="100" :title="addSignTitle" @cancel="addSignOpen = false" :visible.sync="addSignOpen" :width="'40%'" append-to-body><el-form ref="addSignForm" :model="addSignForm" label-width="160px"><el-form-item label="加签类型" prop="addSignType" :rules="[{ required: true, message: '请选择加签类型', trigger: 'blur' }]"><el-radio-group v-model="addSignForm.addSignType" @change="changeAddSignType"><el-radio :label="0">前加签</el-radio><el-radio :label="1">后加签</el-radio><el-radio :label="2">多实例加签</el-radio></el-radio-group></el-form-item><el-form-item label="用户选择" prop="addSignUsers" :rules="[{ required: true, message: '请选择用户', trigger: 'blur' }]"><j-select-user-by-dep v-model="addSignForm.addSignUsers" /></el-form-item><el-form-item label="处理意见" prop="comment" :rules="[{ required: true, message: '请输入处理意见', trigger: 'blur' }]"><el-input type="textarea" v-model="addSignForm.comment" placeholder="请输入处理意见" /></el-form-item><el-form-item label="附件" prop="commentFileDto.fileurl"><j-upload v-model="addSignForm.commentFileDto.fileurl" ></j-upload></el-form-item></el-form><span slot="footer" class="dialog-footer"><el-button @click="addSignOpen = false">取 消</el-button><el-button type="primary" @click="addSignComplete(true)">确 定</el-button></span></a-modal>加签实现代码如下：
/** 加签 */handleAddSign() {this.addSignOpen = true;this.addSignTitle = "前加签流程";},changeAddSignType(val) {this.addSignForm.addSignType = val;if(this.addSignForm.addSignType === 0) {this.addSignTitle = "前加签流程";}if(this.addSignForm.addSignType === 1) {this.addSignTitle = "后加签流程";}if(this.addSignForm.addSignType === 2) {this.addSignTitle = "多实例加签流程";}console.log("changeAddSignType =",val);console.log("this.addSignTitle =",this.addSignTitle);},/** 加签任务 */addSignComplete() {if (!this.addSignForm.addSignUsers ) {this.$message.error("请选择用户");return;}// 流程信息this.addSignForm.deployId = this.$route.query && this.$route.query.deployId;this.addSignForm.taskId = this.$route.query && this.$route.query.taskId;this.addSignForm.procInsId = this.$route.query && this.$route.query.procInsId;this.addSignForm.instanceId = this.$route.query && this.$route.query.procInsId;// 初始化表单this.addSignForm.procDefId = this.$route.query && this.$route.query.procDefId;this.addSignForm.businessKey = this.$route.query && this.$route.query.businessKey;this.addSignForm.category = this.$route.query && this.$route.query.category;this.addSignForm.dataId = this.$route.query && this.$route.query.businessKey;//节点类型this.addSignForm.nodeType = this.$route.query && this.$route.query.nodeType;//online表单id和数据idthis.addSignForm.onlineId = this.$route.query && this.$route.query.onlineId;if (this.addSignForm.category === 'online') {this.addSignForm.onlineDataId = this.$route.query && this.$route.query.businessKey;} //对formdesigner后续加签审批的时候需要用到this.addSignForm.values = this.taskForm.values;console.log("this.addSignForm=",this.addSignForm);if(this.addSignForm.addSignType === 2) {multiInstanceAddSignTask(this.addSignForm).then(response => {this.$message.success(response.message);this.addSignOpen = false;this.goBack();});}else {addSignTask(this.addSignForm).then(response => {this.$message.success(response.message);this.addSignOpen = false;this.goBack();});}},实现效果图如下：
三、后端主要代码
@Overridepublic void addTasksBefore(String processInstanceId, String assignee, Set<String> assignees, String description) {addTask(processInstanceId, assignee, assignees, description, Boolean.FALSE);}@Overridepublic void addTasksAfter(String processInstanceId, String assignee, Set<String> assignees, String description) {addTask(processInstanceId, assignee, assignees, description, Boolean.TRUE);}@Override@Transactional(rollbackFor = Exception.class)public void addTask(String processInstanceId, String assignee, Set<String> assignees, String description,Boolean flag) {TaskEntityImpl task = (TaskEntityImpl) taskService.createTaskQuery().processInstanceId(processInstanceId).taskAssignee(assignee).singleResult();Assert.notNull(task, String.format("分配人 [%s] 没有待处理任务", assignee));//如果是加签再加签String parentTaskId = task.getParentTaskId();if (StrUtil.isBlank(parentTaskId)) {task.setOwner(assignee);task.setAssignee(null);task.setCountEnabled(true);if (flag) {task.setScopeType("after");} else {task.setScopeType("before");}// 设置任务为空执行者taskService.saveTask(task);}//添加加签数据this.createSignSubTasks(assignee, assignees, task);//添加审批意见String type = flag ? FlowComment.HJQ.getType() : FlowComment.QJQ.getType();taskService.addComment(task.getId(), processInstanceId, type, description);}/*** 创建加签子任务* @param assignees 被加签人* @param assignee 加签人* @param taskEntity 父任务*/private void createSignSubTasks(String assignee, Set<String> assignees, TaskEntity taskEntity) {if (CollectionUtil.isNotEmpty(assignees)) {//1.创建被加签人的任务列表assignees.forEach(userId -> {if (StrUtil.isNotBlank(userId)) {this.createSubTask(taskEntity, taskEntity.getId(), userId);}});String parentTaskId = taskEntity.getParentTaskId();if (StrUtil.isBlank(parentTaskId)) {parentTaskId = taskEntity.getId();}String finalParentTaskId = parentTaskId;//2.创建加签人的任务并执行完毕String taskId = taskEntity.getId();if (StrUtil.isBlank(taskEntity.getParentTaskId())) {Task task = this.createSubTask(taskEntity, finalParentTaskId, assignee);taskId = task.getId();}Task taskInfo = taskService.createTaskQuery().taskId(taskId).singleResult();if (ObjectUtil.isNotNull(taskInfo)) {taskService.complete(taskId);}//如果是候选人，需要删除运行时候选不中的数据。long candidateCount = taskService.createTaskQuery().taskId(parentTaskId).taskCandidateUser(assignee).count();if (candidateCount > 0) {taskService.deleteCandidateUser(parentTaskId, assignee);}}}public String getMultiInstanceActAssigneeParam(String processDefinitionId, String actId) {AtomicReference<String> resultParam = new AtomicReference<>();ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().processDefinitionId(processDefinitionId).singleResult();//获取bpmnModel并转为modelNodeBpmnModel bpmnModel = repositoryService.getBpmnModel(processDefinition.getId());//获取主流程Process mainProcess = bpmnModel.getMainProcess();//获取用户任务节点类型，深入子流程mainProcess.findFlowElementsOfType(UserTask.class, true).forEach(userTask -> {String userTaskId = userTask.getId();if (userTaskId.equals(actId)) {Object behavior = userTask.getBehavior();if (ObjectUtil.isNotNull(behavior)) {//并行多实例节点if (behavior instanceof ParallelMultiInstanceBehavior) {ParallelMultiInstanceBehavior parallelMultiInstanceBehavior =(ParallelMultiInstanceBehavior) behavior;String collectionElementVariable = parallelMultiInstanceBehavior.getCollectionElementVariable();if (ObjectUtil.isNotEmpty(collectionElementVariable)) {resultParam.set(collectionElementVariable);}}//串行多实例节点if (behavior instanceof SequentialMultiInstanceBehavior) {SequentialMultiInstanceBehavior sequentialMultiInstanceBehavior =(SequentialMultiInstanceBehavior) behavior;String collectionElementVariable = sequentialMultiInstanceBehavior.getCollectionElementVariable();if (ObjectUtil.isNotEmpty(collectionElementVariable)) {resultParam.set(collectionElementVariable);}}}}});return resultParam.get();}四、实际效果图如下：
![[C++] string类常用接口的模拟实现](https://img-blog.csdnimg.cn/0167ff73d9c04965846dfb80bc702d47.png)
