工作流驳回到指定连线节点上
因为公司项目需要，在工作流的任务节点中能手动驳回到某个任务节点上，所以要对工作流进行改造；众所周知，工作流是通过连线去指定下个任务的，那么实际项目中只有审批是带驳回按钮的，针对activiti配置流程图来讲，带审批的操作一定是带有网关的，那么带网关的节点肯定有一条连线是配置“通过”的连线，在这个网关上可能会配置一条或多条“不通过”的连线，那么我的改造就从这里开始下手。
一、流程图的改造，在配置流程图时，需要注意几点
1、所有网关配置“通过”的那条连线，点击连线，选择Main Config ，在Condition里配置 ${flag=='1'} ，注意flag是判断走哪条连线的流程变量，驳回的连线也叫flag
2、配置驳回的连线，驳回的连线设置流程变量为连线的目标节点id（数据库里也叫key）例如：${flag=='task5'}
再附上一张task5的节点id截图：
3、因为activiti提供的表中没有存放连线信息的表，所以迫不得已想要获取数据，我采取了一种比较暴力的方法，就是从数据库中读取配置信息的配置文件，从配置文件中读取 想要的连线信息，因为用工具画出来的bpmn工作流文件本身实际上就是xml文件，只需要遍历它的节点信息从中找到规律即可掌握它的连线信息。
附上一个bpmn的xml文件：
<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/test">
<process id="taskFuncPro" name="测试订正功能" isExecutable="true">
<documentation>cn/com/sinosoft/mywork/gotoProcinst.ac</documentation>
<extensionElements>
<activiti:executionListener event="end" class="cn.com.sinosoft.mywork.listen.TestEndListener"></activiti:executionListener>
</extensionElements>
<startEvent id="startevent1" name="Start"></startEvent>
<userTask id="task1" name="科长审批" activiti:candidateGroups="ICMIS90060101">
<documentation>isShowBack:'Y'</documentation>
<extensionElements>
<activiti:taskListener event="create" class="cn.com.sinosoft.mywork.listen.TestListener"></activiti:taskListener>
</extensionElements>
</userTask>
<sequenceFlow id="flow5" sourceRef="startevent1" targetRef="task1"></sequenceFlow>
<userTask id="task2" name="主任审批" activiti:candidateGroups="ICMIS90060101">
<extensionElements>
<activiti:taskListener event="create" class="cn.com.sinosoft.mywork.listen.TestListener"></activiti:taskListener>
</extensionElements>
</userTask>
<userTask id="task3" name="领导审批" activiti:candidateGroups="ICMIS90060101">
<extensionElements>
<activiti:taskListener event="create" class="cn.com.sinosoft.mywork.listen.TestListener"></activiti:taskListener>
</extensionElements>
</userTask>
<exclusiveGateway id="exclusivegateway1" name="Exclusive Gateway"></exclusiveGateway>
<sequenceFlow id="flow11" sourceRef="task2" targetRef="exclusivegateway1"></sequenceFlow>
<sequenceFlow id="flow12" name="通过" sourceRef="exclusivegateway1" targetRef="task3">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${flag=='1'}]]></conditionExpression>
</sequenceFlow>
<exclusiveGateway id="exclusivegateway2" name="Exclusive Gateway"></exclusiveGateway>
<userTask id="task4" name="大领导确认" activiti:candidateGroups="ICMIS90060101">
<documentation>isShowBack:'N'</documentation>
<extensionElements>
<activiti:taskListener event="create" class="cn.com.sinosoft.mywork.listen.TestListener"></activiti:taskListener>
</extensionElements>
</userTask>
<sequenceFlow id="flow14" sourceRef="task3" targetRef="exclusivegateway2"></sequenceFlow>
<sequenceFlow id="flow15" name="通过" sourceRef="exclusivegateway2" targetRef="task4">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${flag=='1'}]]></conditionExpression>
</sequenceFlow>
<sequenceFlow id="flow16" name="驳回到主任审批" sourceRef="exclusivegateway2" targetRef="task2">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${flag=='task2'}]]></conditionExpression>
</sequenceFlow>
<endEvent id="endevent1" name="End"></endEvent>
<sequenceFlow id="flow18" sourceRef="task4" targetRef="endevent1"></sequenceFlow>
<userTask id="task5" name="科员订正" activiti:candidateGroups="ICMIS90060101">
<documentation>url:'cn/com/sinosoft/mywork/testCorrect.ac',
isCorrect:'Y'</documentation>
<extensionElements>
<activiti:taskListener event="create" class="cn.com.sinosoft.mywork.listen.TestListener"></activiti:taskListener>
</extensionElements>
</userTask>
<exclusiveGateway id="exclusivegateway3" name="Exclusive Gateway"></exclusiveGateway>
<sequenceFlow id="flow19" sourceRef="task1" targetRef="exclusivegateway3"></sequenceFlow>
<sequenceFlow id="flow20" name="通过" sourceRef="exclusivegateway3" targetRef="task2">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${flag=='1'}]]></conditionExpression>
</sequenceFlow>
<sequenceFlow id="flow21" name="不通过" sourceRef="exclusivegateway3" targetRef="task5">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${flag=='task5'}]]></conditionExpression>
</sequenceFlow>
<sequenceFlow id="flow22" sourceRef="task5" targetRef="task1"></sequenceFlow>
<sequenceFlow id="flow23" name="驳回到科长审批" sourceRef="exclusivegateway2" targetRef="task1">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${flag=='task1'}]]></conditionExpression>
</sequenceFlow>
<sequenceFlow id="flow24" name="不通过" sourceRef="exclusivegateway1" targetRef="task1">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${flag=='task1'}]]></conditionExpression>
</sequenceFlow>
<sequenceFlow id="flow25" name="驳回到科员" sourceRef="exclusivegateway2" targetRef="task5">
<conditionExpression xsi:type="tFormalExpression"><![CDATA[${flag=='task5'}]]></conditionExpression>
</sequenceFlow>
</process>
<bpmndi:BPMNDiagram id="BPMNDiagram_taskFuncPro">
<bpmndi:BPMNPlane bpmnElement="taskFuncPro" id="BPMNPlane_taskFuncPro">
<bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">
<omgdc:Bounds height="35.0" width="35.0" x="80.0" y="155.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="task1" id="BPMNShape_task1">
<omgdc:Bounds height="55.0" width="105.0" x="240.0" y="145.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="task2" id="BPMNShape_task2">
<omgdc:Bounds height="55.0" width="105.0" x="592.0" y="146.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="task3" id="BPMNShape_task3">
<omgdc:Bounds height="55.0" width="105.0" x="592.0" y="336.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="exclusivegateway1" id="BPMNShape_exclusivegateway1">
<omgdc:Bounds height="40.0" width="40.0" x="624.0" y="226.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="exclusivegateway2" id="BPMNShape_exclusivegateway2">
<omgdc:Bounds height="40.0" width="40.0" x="624.0" y="446.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="task4" id="BPMNShape_task4">
<omgdc:Bounds height="55.0" width="105.0" x="592.0" y="536.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
<omgdc:Bounds height="35.0" width="35.0" x="742.0" y="546.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="task5" id="BPMNShape_task5">
<omgdc:Bounds height="55.0" width="105.0" x="240.0" y="298.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNShape bpmnElement="exclusivegateway3" id="BPMNShape_exclusivegateway3">
<omgdc:Bounds height="40.0" width="40.0" x="432.0" y="153.0"></omgdc:Bounds>
</bpmndi:BPMNShape>
<bpmndi:BPMNEdge bpmnElement="flow5" id="BPMNEdge_flow5">
<omgdi:waypoint x="115.0" y="172.0"></omgdi:waypoint>
<omgdi:waypoint x="240.0" y="172.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow11" id="BPMNEdge_flow11">
<omgdi:waypoint x="644.0" y="201.0"></omgdi:waypoint>
<omgdi:waypoint x="644.0" y="226.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow12" id="BPMNEdge_flow12">
<omgdi:waypoint x="644.0" y="266.0"></omgdi:waypoint>
<omgdi:waypoint x="644.0" y="336.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="14.0" width="24.0" x="653.0" y="285.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow14" id="BPMNEdge_flow14">
<omgdi:waypoint x="644.0" y="391.0"></omgdi:waypoint>
<omgdi:waypoint x="644.0" y="446.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow15" id="BPMNEdge_flow15">
<omgdi:waypoint x="644.0" y="486.0"></omgdi:waypoint>
<omgdi:waypoint x="644.0" y="536.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="14.0" width="24.0" x="654.0" y="486.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow16" id="BPMNEdge_flow16">
<omgdi:waypoint x="624.0" y="466.0"></omgdi:waypoint>
<omgdi:waypoint x="544.0" y="465.0"></omgdi:waypoint>
<omgdi:waypoint x="544.0" y="329.0"></omgdi:waypoint>
<omgdi:waypoint x="544.0" y="174.0"></omgdi:waypoint>
<omgdi:waypoint x="592.0" y="173.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="14.0" width="84.0" x="461.0" y="387.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow18" id="BPMNEdge_flow18">
<omgdi:waypoint x="697.0" y="563.0"></omgdi:waypoint>
<omgdi:waypoint x="742.0" y="563.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow19" id="BPMNEdge_flow19">
<omgdi:waypoint x="345.0" y="172.0"></omgdi:waypoint>
<omgdi:waypoint x="432.0" y="173.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow20" id="BPMNEdge_flow20">
<omgdi:waypoint x="472.0" y="173.0"></omgdi:waypoint>
<omgdi:waypoint x="592.0" y="173.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="14.0" width="24.0" x="511.0" y="155.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow21" id="BPMNEdge_flow21">
<omgdi:waypoint x="452.0" y="193.0"></omgdi:waypoint>
<omgdi:waypoint x="451.0" y="325.0"></omgdi:waypoint>
<omgdi:waypoint x="345.0" y="325.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="14.0" width="36.0" x="463.0" y="239.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow22" id="BPMNEdge_flow22">
<omgdi:waypoint x="292.0" y="298.0"></omgdi:waypoint>
<omgdi:waypoint x="292.0" y="200.0"></omgdi:waypoint>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow23" id="BPMNEdge_flow23">
<omgdi:waypoint x="624.0" y="466.0"></omgdi:waypoint>
<omgdi:waypoint x="188.0" y="465.0"></omgdi:waypoint>
<omgdi:waypoint x="188.0" y="172.0"></omgdi:waypoint>
<omgdi:waypoint x="240.0" y="172.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="14.0" width="84.0" x="383.0" y="473.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow24" id="BPMNEdge_flow24">
<omgdi:waypoint x="664.0" y="246.0"></omgdi:waypoint>
<omgdi:waypoint x="740.0" y="245.0"></omgdi:waypoint>
<omgdi:waypoint x="740.0" y="89.0"></omgdi:waypoint>
<omgdi:waypoint x="669.0" y="89.0"></omgdi:waypoint>
<omgdi:waypoint x="292.0" y="89.0"></omgdi:waypoint>
<omgdi:waypoint x="292.0" y="145.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="14.0" width="36.0" x="749.0" y="167.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
<bpmndi:BPMNEdge bpmnElement="flow25" id="BPMNEdge_flow25">
<omgdi:waypoint x="624.0" y="466.0"></omgdi:waypoint>
<omgdi:waypoint x="292.0" y="466.0"></omgdi:waypoint>
<omgdi:waypoint x="292.0" y="353.0"></omgdi:waypoint>
<bpmndi:BPMNLabel>
<omgdc:Bounds height="14.0" width="60.0" x="302.0" y="399.0"></omgdc:Bounds>
</bpmndi:BPMNLabel>
</bpmndi:BPMNEdge>
</bpmndi:BPMNPlane>
</bpmndi:BPMNDiagram>
</definitions>
二、流程图按照约定配置好后，接下来开始配置java文件了
1、我们先想一下，如何减少对流程定义文件（*.bpmn）的读写操作，但又能及时的获取想要的连线信息呢，很简单我们只要在创建流程实例的时候将连线的信息从xml中读取出来并存放到流程变量当中，那么我们就可以随时的取用啦，好了废话不多讲，直接上干货：
1 public String startProcess(String processDefinitionKey, 2 Map<String, Object> vMap,String targetFilePath) { 3 RuntimeService rs = this.processEngine.getRuntimeService(); 4 //设置发起人，这个方法是通过线程判断是一个了流程实例的 5 this.processEngine.getIdentityService().setAuthenticatedUserId(vMap.get(WorkFlowConstant.START_USER).toString()); 6 User user = this.processEngine.getIdentityService().createUserQuery() 7 .userId(vMap.get(WorkFlowConstant.START_USER).toString()) 8 .singleResult(); 9 vMap.put("ac", processDefinitionKey); 10 ProcessDefinition processDefinition = this 11 .getProcessDefinitionByKey(processDefinitionKey); 12 vMap.put(WorkFlowConstant.VIEW_URL, processDefinition.getDescription()); 13 14 15 Map<String,Object> map=getSeqFlowByBpmn(processDefinition.getDeploymentId(),targetFilePath); 16 vMap.put(WorkFlowConstant.SEQUENCEFLOW, map); 17 18 // 保存日志 19 ProcessInstance instance = rs.startProcessInstanceByKey( 20 processDefinitionKey, vMap); 21 TaskMarkModel taskMarkModel = new TaskMarkModel(); 22 taskMarkModel.setAuditRemark("发起任务"); 23 //排序使用 24 taskMarkModel.setCreateDate(new Date(new Date().getTime()-100000)); 25 taskMarkModel.setDoDate(new Date(new Date().getTime()-100000)); 26 taskMarkModel.setDoResult("发起任务"); 27 taskMarkModel.setDoUserName(user.getFirstName()); 28 taskMarkModel.setPid(instance.getProcessInstanceId()); 29 taskMarkModel.setpName(processDefinition.getName()); 30 taskMarkModel.setTaskName("发起任务"); 31 this.saveTaskMark(taskMarkModel); 32 // 保存日志结束 33 return instance.getProcessInstanceId(); 34 } 35 36 /** 37 * 获取每个任务的连线. 38 * 39 * @Title: getSeqFlowByBpmn 40 * @author liufei12581@sinosoft.com.cn 41 * @param deploymentid 部署id 42 * @param targetFilePath 路径 43 * @return 44 */ 45 public Map getSeqFlowByBpmn(String deploymentid,String targetFilePath){ 46 Map<String,List<String>> map=new HashMap<String, List<String>>(); 47 Map<String,String> taskmap=new HashMap<String, String>(); 48 Map allmap=new HashMap(); 49 try { 50 InputStream in=null; 51 List<String> list = getProcessEngine().getRepositoryService()// 52 .getDeploymentResourceNames(deploymentid); 53 //定义图片资源的名称 54 String resourceName = ""; 55 if(list!=null && list.size()>0){ 56 for(String name:list){ 57 if(name.indexOf(".bpmn")>=0){ 58 resourceName = name; 59 } 60 } 61 } 62 //获取数据库里部署的bpmn文件 63 in = getProcessEngine().getRepositoryService() 64 .getResourceAsStream(deploymentid, resourceName); 65 //将bpmn文件另存到本地并写入xml文件 66 String fileName=resourceName.substring(0,resourceName.indexOf("."))+".xml"; 67 File file = new File(targetFilePath+fileName); 68 // if(file.exists()){//判断文件是否存在 69 System.out.println(targetFilePath); 70 file.delete();//如果存在则先删除 71 file.createNewFile(); //创建文件 72 OutputStream output = new FileOutputStream(file); 73 BufferedOutputStream bufferedOutput = new BufferedOutputStream(output); 74 bufferedOutput.write(IcmisUnit.toByteArray(in)); 75 // } 76 //获取dom工厂得到dom对象 77 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();//步骤1 78 DocumentBuilder builder = factory.newDocumentBuilder();//步骤2 79 //将保存的xml解析成dom树 80 Document doc = builder.parse(file);//步骤3 81 //获取连线的所有node 82 NodeList sequenceFlow = doc.getElementsByTagName("sequenceFlow"); 83 //获取网关的所有node 84 NodeList exclusiveGateway = doc.getElementsByTagName("exclusiveGateway"); 85 //获取任务的所有node 86 NodeList userTask = doc.getElementsByTagName("userTask"); 87 88 //循环任务节点 89 for (int i = 0; i < userTask.getLength(); i++) { 90 //获取任务节点的id属性 91 String id=userTask.item(i).getAttributes().getNamedItem("id").getNodeValue(); 92 //获取任务节点的name属性 93 String name=userTask.item(i).getAttributes().getNamedItem("name").getNodeValue(); 94 taskmap.put(id, name); 95 } 96 97 98 99 //循环连线节点 100 for (int i = 0; i < sequenceFlow.getLength(); i++) { 101 //获取连线的起始节点 102 String sourceTask=sequenceFlow.item(i).getAttributes().getNamedItem("sourceRef").getNodeValue(); 103 //获取连线的目标节点 104 String targetTask=sequenceFlow.item(i).getAttributes().getNamedItem("targetRef").getNodeValue(); 105 boolean bool=true;//用来判断是否是通过的连线，下面的操作是为了过滤描述通过的连线 106 107 //获取连线节点下的配置信息节点，一个连线应该只有一个配置节点 108 NodeList nl= sequenceFlow.item(i).getChildNodes(); 109 for (int j = 0; j <nl.getLength(); j++) { 110 if(nl.item(j).getNodeType()==Node.ELEMENT_NODE){ 111 //找到配置节点，并得到配置的值 112 if("conditionExpression".equals(nl.item(j).getNodeName())){ 113 //这里要注意一下：配置通过的连线一定要写成${flag=='1'}或"${flag==\"1\"} 114 String flag=Util.nulltostr(nl.item(j).getFirstChild().getNodeValue()); 115 if("${flag=='1'}".equals(flag)||"${flag==\"1\"}".equals(flag)){ 116 //表示是通过的连线，如果是通过的连线则不做处理，这里用到了上面的boolean变量，通过变量来控制过滤节点 117 bool=false; 118 119 } 120 } 121 } 122 } 123 //通过变量过滤已通过的连线节点 124 if(bool){ 125 //存连线的开始任务 126 if(map.containsKey(sourceTask)){ 127 //表示存在 128 map.get(sourceTask).add(targetTask); 129 }else{ 130 //表示不存在 131 List<String> targetlist=new ArrayList<String>(); 132 targetlist.add(targetTask); 133 map.put(sourceTask, targetlist); 134 } 135 } 136 } 137 138 139 //默认取出来的连线针对网关记录的是网关的节点，但是实际操作中想要得到网关的节点id是不可能的，所以加了一步处理，获取连接网关的上个节点 140 //这里要说明一下，连接到网关的连线 也就是targetRef肯定是只有一条连线，所以顺藤摸瓜找到了连接网关的任务节点，这样在实际项目中 141 //通过任务节点即可找到驳回连线的targetRef任务节点，即可展示到前台让客户去选择驳回的连线啦 142 //循环网关node 143 for (int i = 0; i < exclusiveGateway.getLength(); i++) { 144 //得到网关id 145 String exclusiveGatewayid=exclusiveGateway.item(i).getAttributes().getNamedItem("id").getNodeValue(); 146 //通过循环所有的连线，比对得到那条唯一连接网关的连线将数据重新防止到map当中 147 for (String key : map.keySet()) { 148 for (String target : map.get(key)) { 149 if(exclusiveGatewayid.equals(target)){ 150 map.put(key, map.get(exclusiveGatewayid)); 151 } 152 153 } 154 } 155 156 } 157 158 159 } catch (Exception e) { 160 e.printStackTrace(); 161 } 162 163 allmap.put(WorkFlowConstant.SEQ, map); 164 allmap.put(WorkFlowConstant.USERTASK, taskmap); 165 return allmap; 166 } 167
ps：TaskMarkModel这个类是我记录历史信息的类，没用工作流自带的历史表，如果各位看官使用的是自带的工作流 只需要去掉记录历史这段即可，如果也想自己记录文档下面我会将这个改造包打包，并附上创建表的sql脚本。
2、通过上面的操作，我们已经将连线的信息以及所有的任务节点id和名称都存到了流程变量当中，那么如何获取呢？当我在页面上点击驳回按钮时：
1 //驳回 2 function rebutFn() { 3 $("#mytr").show(); 4 url="${ctx}/cn/com/sinosoft/mywork/seqBackTask.ac?taskid=${taskid}"; 5 backTask.setUrl(url); 6 //设置默认驳回到上个任务节点 7 var backnum=backTask.getCount(); 8 //其实通过（确认）节点 是有连线的，只在第一次未产生历史记录时会判断,如果数据已产生历史记录是可以找到节点的，此处应在配置流程图中精确配置信息 9 if(backnum<1){ 10 mini.alert("流程图配置有误,当前节点未配置驳回连线，<br/>请配置好连线后再点击驳回！"); 11 return; 12 } 13 backnum=backnum<1?0:backnum-1; 14 backTask.select(backTask.getAt(backnum)); 15 mini.get("auditType").setValue("2"); 16 showAtPos(); 17 18 }
可以看到通过配置struts的配置文件找到了后台进入action层，在action层里获取业务层传回来的指定格式的字符串，并输出到前台，前台判断下拉框是否有值来提示是否有连线。
ps：前台框架使用的是jqueryminiUI 来展现数据的， backTask.setUrl(url); 其中backTask是js声明的全局对象，初始化方法里赋值backTask=mini.get("backTask"); 这其实就是个下拉框对象，没有用juqeyminiUI的朋友也不要紧 使用ajax将当前的任务id传到后台即可获取该任务的所有连线，驳回的连线中已经过滤掉通过的连线了。
后台方法：
1 public String getSeqByTaskid(String taskid) { 2 Task t=getProcessEngine().getTaskService().createTaskQuery().taskId(taskid).singleResult(); 3 Map<String,Object> vars = getProcessEngine().getTaskService().getVariables(taskid); 4 Map allmap=(Map)vars.get(WorkFlowConstant.SEQUENCEFLOW); 5 Map<String,List<String>> map=(Map<String,List<String>> )allmap.get(WorkFlowConstant.SEQ); 6 Map<String,String> taskmap=(Map<String,String> )allmap.get(WorkFlowConstant.USERTASK); 7 List<String> list=map.get(t.getTaskDefinitionKey()); 8 JSONObject Jobj = null; 9 JSONArray JArray = new JSONArray(); 10 if(list!=null&&list.size()>0){ 11 for (String taskdefkey : list) { 12 Jobj =new JSONObject(); 13 Jobj.put("ID",Util.nulltostr(taskdefkey)); 14 if(taskmap.containsKey(taskdefkey)){ 15 Jobj.put("NAME",Util.nulltostr(taskmap.get(taskdefkey))); 16 }else{ 17 Jobj.put("NAME",""); 18 System.out.println("未找到配置的节点"); 19 } 20 JArray.add(Jobj); 21 } 22 }else{ 23 System.out.println("该任务节点未找到连线"); 24 } 25 return JArray.toString(); 26 }
写到了这步基本上实现大部分功能了，在前台页面上展示一下驳回的节点信息 然后让用户手动选择驳回的节点，点击提交后将节点值传递到后台，设置连线的流程变量flag为传递过来的值，认领任务，完成任务，就实现驳回操作啦，给大家展示下代码和效果吧。
前台让用户选择要驳回的任务节点:
jsp页面提交代码：
1 //提交保存操作 2 function save(){ 3 workflowform.validate(); 4 if (workflowform.isValid() == false) { 5 showFormErrorTexts(workflowform.getErrorTexts()); 6 return; 7 }else{ 8 mini.mask({ 9 el : document.body, 10 cls : 'mini-mask-loading', 11 html : '提交中...' 12 }); 13 $.ajax({ 14 type : "post", 15 url : "${ctx}/cn/com/sinosoft/mywork/workflowAudit.ac", 16 data : { 17 "taskid" : "${taskid}", 18 "auditremark" :mini.get("describe.auditremark").getValue(), 19 "handlingresults" : mini.get("auditType").getValue(), 20 "taskDefKey":backTask.getValue() 21 }, 22 success : function(text) { 23 CloseWindow('save'); 24 } 25 }); 26 } 27 }
Action里将值都获取到后传入业务层方法中
1 public void saveWorkflowAudit(String taskId,String handlingResult,String auditMark, String taskDefKey) { 2 UserView user = (UserView) ServletActionContext.getRequest() 3 .getSession().getAttribute(FrameConstant.SESSION_USERVIEW); 4 TaskDescribe describe = this.getDescribe(taskId); 5 Task task = this.getWorkflowBaseService().getTaskById(taskId); 6 ProcessDefinition processDefinition = this.getWorkflowBaseService().getProcessDefinitionById(task.getProcessDefinitionId()); 7 8 try { 9 //非空验证 10 if(!Util.isNullOrEmpty(describe)){ 11 getWorkflowBaseService().claim(taskId, user.getUsername()); 12 Map<String,Object> vMap = new HashMap<String, Object>(); 13 //设置连线指向 目前通过的连线flag都配置1，驳回的连线配置驳回节点的配置id 14 vMap.put("flag", WorkFlowConstant.AUDIT_SEQ_VIA.equals(handlingResult)?handlingResult:taskDefKey); 15 //完成处理 16 getWorkflowBaseService().completeTask(taskId, vMap); 17 //保存痕迹 18 String doResult ="1".equals(handlingResult)?"通过":"不通过"; 19 TaskMarkModel tmm = new TaskMarkModel(); 20 tmm.setAuditRemark(auditMark); 21 tmm.setCreateDate(task.getCreateTime()); 22 tmm.setDoDate(new Date()); 23 tmm.setDoResult(doResult); 24 tmm.setDoUserName(user.getName()); 25 tmm.setPid(task.getProcessInstanceId()); 26 tmm.setpName(processDefinition.getName()); 27 tmm.setTaskName(task.getName()); 28 tmm.setUsername(user.getUsername()); 29 tmm.setTaskId(taskId); 30 tmm.setTaskdefKey(task.getTaskDefinitionKey()); 31 this.workflowBaseService.saveTaskMark(tmm); 32 //保存痕迹结束 33 } 34 35 36 } catch (Exception e) { 37 e.printStackTrace(); 38 } 39 }
好啦，大功告成，就这样我们又开始快乐滴编程啦！
附件(选择复制到浏览器打开，360浏览器选择复制—打开链接，即可下载)：
https://files.cnblogs.com/files/mycifeng/mywork.zip
