Activiti中脚本任务一般是用在当前的监听器或者监听服务类都不能满足的情形下面，或者说后期系统维护，突然在不想改动系统的情况下需要对流程做一些适当的改变。仅仅是几个变量或者仅仅是一个计算公式等等。这个时候可以使用脚本任务。一般有三种使用方式，Javascript, Juel, Groovy脚本。以下讲述avascript, Juel。
*后台服务基于Springboot2 + Activiti6，整合文章请参考：https://blog.csdn.net/yy756127197/article/details/101211510 不需要流程设计器就排除3,4步骤 *
javascript节点设置 Script内容：
var myVar = "sima"; execution.setVariable("user", myVar); for(var i=0; i<10; i++){ print(i) }execution是内置 对象
juel Script内容：
${myBean.print(execution)}myBean是变量，启动流程时候传递的
流程图
流程文件bpmn
<?xml version="1.0" encoding="UTF-8"?> <definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/processdef"> <process id="scriptTask" name="scriptTask" isExecutable="true"> <documentation>scriptTask</documentation> <startEvent id="startEvent1"></startEvent> <scriptTask id="sid-CF08BBA7-509F-4246-B4BC-939236D90185" name="javascript任务" scriptFormat="javascript" activiti:autoStoreVariables="false"> <script><![CDATA[var myVar = "sima"; execution.setVariable("user", myVar); for(var i=0; i<10; i++){ print(i) }]]></script> </scriptTask> <sequenceFlow id="sid-EB8225D9-E9B8-4E6D-ADDB-59BFDA5F3DCB" sourceRef="startEvent1" targetRef="sid-CF08BBA7-509F-4246-B4BC-939236D90185"></sequenceFlow> <scriptTask id="sid-07E57300-6B1F-47E3-ACFD-5210B7CA4847" name="juel脚本" scriptFormat="juel" activiti:autoStoreVariables="false"> <script><![CDATA[${myBean.print(execution)}]]></script> </scriptTask> <sequenceFlow id="sid-A920AD82-A34C-4EBD-9943-8BFB9BC41B5C" sourceRef="sid-CF08BBA7-509F-4246-B4BC-939236D90185" targetRef="sid-07E57300-6B1F-47E3-ACFD-5210B7CA4847"></sequenceFlow> <endEvent id="sid-F670C82B-26AA-4DA3-9692-CCAFA6ECE1C4"></endEvent> <sequenceFlow id="sid-6DF92EFE-7A7E-48B9-9EC4-60D00DDDCE08" sourceRef="sid-07E57300-6B1F-47E3-ACFD-5210B7CA4847" targetRef="sid-F670C82B-26AA-4DA3-9692-CCAFA6ECE1C4"></sequenceFlow> </process> <bpmndi:BPMNDiagram id="BPMNDiagram_scriptTask"> <bpmndi:BPMNPlane bpmnElement="scriptTask" id="BPMNPlane_scriptTask"> <bpmndi:BPMNShape bpmnElement="startEvent1" id="BPMNShape_startEvent1"> <omgdc:Bounds height="30.0" width="30.0" x="135.0" y="163.0"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNShape bpmnElement="sid-CF08BBA7-509F-4246-B4BC-939236D90185" id="BPMNShape_sid-CF08BBA7-509F-4246-B4BC-939236D90185"> <omgdc:Bounds height="80.0" width="100.0" x="270.0" y="138.0"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNShape bpmnElement="sid-07E57300-6B1F-47E3-ACFD-5210B7CA4847" id="BPMNShape_sid-07E57300-6B1F-47E3-ACFD-5210B7CA4847"> <omgdc:Bounds height="80.0" width="100.0" x="480.0" y="140.0"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNShape bpmnElement="sid-F670C82B-26AA-4DA3-9692-CCAFA6ECE1C4" id="BPMNShape_sid-F670C82B-26AA-4DA3-9692-CCAFA6ECE1C4"> <omgdc:Bounds height="28.0" width="28.0" x="675.0" y="166.0"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNEdge bpmnElement="sid-A920AD82-A34C-4EBD-9943-8BFB9BC41B5C" id="BPMNEdge_sid-A920AD82-A34C-4EBD-9943-8BFB9BC41B5C"> <omgdi:waypoint x="370.0" y="178.0"></omgdi:waypoint> <omgdi:waypoint x="480.0" y="178.0"></omgdi:waypoint> </bpmndi:BPMNEdge> <bpmndi:BPMNEdge bpmnElement="sid-6DF92EFE-7A7E-48B9-9EC4-60D00DDDCE08" id="BPMNEdge_sid-6DF92EFE-7A7E-48B9-9EC4-60D00DDDCE08"> <omgdi:waypoint x="580.0" y="180.0"></omgdi:waypoint> <omgdi:waypoint x="675.0" y="180.0"></omgdi:waypoint> </bpmndi:BPMNEdge> <bpmndi:BPMNEdge bpmnElement="sid-EB8225D9-E9B8-4E6D-ADDB-59BFDA5F3DCB" id="BPMNEdge_sid-EB8225D9-E9B8-4E6D-ADDB-59BFDA5F3DCB"> <omgdi:waypoint x="165.0" y="178.0"></omgdi:waypoint> <omgdi:waypoint x="270.0" y="178.0"></omgdi:waypoint> </bpmndi:BPMNEdge> </bpmndi:BPMNPlane> </bpmndi:BPMNDiagram> </definitions>ServiceTaskTest .java
import com.it.cloud.modules.activiti.service.IActReModelService; import org.activiti.engine.HistoryService; import org.activiti.engine.RepositoryService; import org.activiti.engine.RuntimeService; import org.activiti.engine.TaskService; import org.activiti.engine.repository.Deployment; import org.activiti.engine.runtime.ProcessInstance; import org.activiti.engine.task.Task; import org.junit.Test; import org.junit.runner.RunWith; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.test.context.junit4.SpringRunner; import java.util.HashMap; import java.util.List; import java.util.Map; /** * 服务任务测试 */ @RunWith(SpringRunner.class) @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT) public class ServiceTaskTest { @Autowired private IActReModelService actReModelService; @Autowired private RuntimeService runtimeService; @Autowired private RepositoryService repositoryService; @Autowired private TaskService taskService; @Autowired private HistoryService historyService; /** * 部署流程定义 */ @Test public void deploy() { Deployment deployment = repositoryService.createDeployment() // 创建部署 .addClasspathResource("diagrams/serviceTask.bpmn20.xml") // 加载流程资源文件 .name("serviceTask流程") // 流程名称 .deploy(); // 部署 System.out.println("流程部署ID:" + deployment.getId()); System.out.println("流程部署Name:" + deployment.getName()); } /** * 启动流程实例 */ @Test public void start() { ProcessInstance pi = runtimeService.startProcessInstanceByKey("serviceTask"); // 流程定义表的KEY字段值 System.out.println("流程实例ID:" + pi.getId()); System.out.println("流程定义ID:" + pi.getProcessDefinitionId()); } /** * 查看任务 */ @Test public void queryTask() { List<Task> taskList = taskService.createTaskQuery() // 创建任务查询 .taskAssignee("admin") // 指定某个人 .list(); for (Task task : taskList) { System.out.println("任务ID:" + task.getId()); System.out.println("任务名称:" + task.getName()); System.out.println("任务创建时间:" + task.getCreateTime()); System.out.println("任务委派人:" + task.getAssignee()); System.out.println("流程实例ID:" + task.getProcessInstanceId()); } } /** * 完成任务 */ @Test public void completeTask() { taskService.complete("85005"); } /** * 完成任务2 */ @Test public void completeTask2() { Map<String, Object> variables = new HashMap<String, Object>(); variables.put("days", 7); taskService.complete("165005", variables); } }运行deploy()
运行start()
效果： 数据表ACT_HI_VARINST
IT-CLOUD-ACTIVITI6 开源项目，持续更新中，喜欢请 Star~
IT-CLOUD :IT服务管理平台，集成基础服务，中间件服务，监控告警服务等。 开源项目，持续更新中，喜欢请 Star~
司马缸砸缸了 认证博客专家 Java 中间件达人 博客专家 拥有5年开发经验，主要擅长领域：中间件，JAVA，分布式，APM。善于专研，乐于分享。人生格言：只管努力，其他的交给命运。