1.Flowable是什么？
Flowable是一个使用Java编写的轻量级业务流程引擎。Flowable流程引擎可用于部署BPMN 2.0流程定义（用于定义流程的行业XML标准）， 创建这些流程定义的流程实例，进行查询，访问运行中或历史的流程实例与相关数据，等等。这个章节将用一个可以在你自己的开发环境中使用的例子，逐步介绍各种概念与API。
Flowable可以十分灵活地加入你的应用/服务/构架。可以将JAR形式发布的Flowable库加入应用或服务，来嵌入引擎。 以JAR形式发布使Flowable可以轻易加入任何Java环境：Java SE；Tomcat、Jetty或Spring之类的servlet容器；JBoss或WebSphere之类的Java EE服务器，等等。 另外，也可以使用Flowable REST API进行HTTP调用。也有许多Flowable应用（Flowable Modeler, Flowable Admin, Flowable IDM 与 Flowable Task），提供了直接可用的UI示例，可以使用流程与任务。
所有使用Flowable方法的共同点是核心引擎。核心引擎是一组服务的集合，并提供管理与执行业务流程的API。 下面的教程从设置与使用核心引擎的介绍开始。后续章节都建立在之前章节中获取的知识之上。
2. Flowable与Activiti
Flowable是Activiti(Alfresco持有的注册商标)的fork。在下面的章节中，你会注意到包名，配置文件等等，都使用flowable。
3.项目中简单使用
import com.ilotterytech.component.flowable.utils.FlowDefineUtils; import junit.framework.TestCase; import org.apache.commons.io.FileUtils; import org.apache.commons.io.IOUtils; import org.flowable.bpmn.model.BpmnModel; import org.flowable.bpmn.model.ExtensionElement; import org.flowable.bpmn.model.StartEvent; import org.flowable.bpmn.model.UserTask; import org.flowable.engine.*; import org.flowable.engine.history.HistoricProcessInstance; import org.flowable.engine.impl.cfg.StandaloneProcessEngineConfiguration; import org.flowable.engine.parse.BpmnParseHandler; import org.flowable.engine.repository.Deployment; import org.flowable.engine.repository.ProcessDefinition; import org.flowable.engine.runtime.ProcessInstance; import org.flowable.image.impl.DefaultProcessDiagramGenerator; import org.flowable.task.api.Task; import org.flowable.task.api.history.HistoricTaskInstance; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.util.*; /** * Created by Zhang on 2018/11/30. */ public class FlowableTest extends TestCase { private StandaloneProcessEngineConfiguration cfg; private ProcessEngine processEngine; @Override protected void setUp() throws Exception { super.setUp(); cfg = new StandaloneProcessEngineConfiguration(); cfg.setJdbcUrl("jdbc:mysql://192.168.110.2:3306/bwlbis?useSSL=false") .setJdbcUsername("bwlbis") .setJdbcPassword("bwlbis1234") .setJdbcDriver("com.mysql.jdbc.Driver") .setDatabaseType(ProcessEngineConfiguration.DATABASE_TYPE_MYSQL) .setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE); List<BpmnParseHandler> handlers = new ArrayList<>(); //handlers.add(new ExtensionUserTaskParseHandler()); //cfg.setCustomDefaultBpmnParseHandlers(handlers); processEngine = cfg.buildProcessEngine(); } public void testDeploy(){ RepositoryService repositoryService = processEngine.getRepositoryService(); Deployment deployment = repositoryService.createDeployment() .addClasspathResource("bpmn/stationFee.bpmn20.xml") .deploy(); } public void testQueryDeploy() throws IOException{ RepositoryService repositoryService = processEngine.getRepositoryService(); ProcessDefinition define = repositoryService.createProcessDefinitionQuery() .processDefinitionKey("holidayRequest") .singleResult(); BpmnModel model = repositoryService.getBpmnModel(define.getId()); List<UserTask> list = model.getMainProcess().findFlowElementsOfType(UserTask.class); UserTask task = list.get(0); ExtensionElement ee = task.getExtensionElements().get("page").get(0); System.out.println(ee.getAttributes()); System.out.println(ee.getAttributeValue(null, "name")); System.out.println("Found process definition : " + define.getDiagramResourceName()); List<StartEvent> events = model.getMainProcess().findFlowElementsOfType(StartEvent.class); StartEvent se = events.get(0); ee = se.getExtensionElements().get("page").get(0); System.out.println(ee.getAttributes()); System.out.println(ee.getAttributeValue(null, "name")); ee = se.getExtensionElements().get("service").get(0); List<ExtensionElement> ext = ee.getChildElements().get("invoke"); ext.forEach(e ->{ System.out.println(e.getElementText()); }); String value = FlowDefineUtils.getStartEventExtensionAttributeValue(define, "page", "name", repositoryService); System.out.println(value); } public void testStart(){ RepositoryService repositoryService = processEngine.getRepositoryService(); ProcessDefinition define =repositoryService.createProcessDefinitionQuery() .processDefinitionKey("holidayRequest") .singleResult(); System.out.println("Found process definition : " + define.getName()); RuntimeService runtimeService = processEngine.getRuntimeService(); Map<String, Object> variables = new HashMap<>(); variables.put("employee", "test"); variables.put("nrOfHolidays", 5); variables.put("description", "年假"); ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("holidayRequest", variables); System.out.println("start up flow [" + processInstance.getId() + "]"); } public void testQueryTask(){ RepositoryService repositoryService = processEngine.getRepositoryService(); TaskService taskService = processEngine.getTaskService(); List<Task> tasks = taskService.createTaskQuery() .or() .taskAssignee("10") .taskCandidateGroup("managers") .endOr() .list(); System.out.println("你有 " + tasks.size() + " 个待办任务:"); for (int i = 0; i < tasks.size(); i++) { Task t = tasks.get(i); System.out.println(t.getClass()); Map<String, Object> processVariables = taskService.getVariables(t.getId()); System.out.println(String.format("%d) %s : %s - %s - %s - %s - %s", i + 1, t.getName(), t.getId(), t.getAssignee(), t.getCategory(), t.getCreateTime(), processVariables.get("employee"))); } } public void testSubmitTask(){ TaskService taskService = processEngine.getTaskService(); List<Task> tasks = taskService.createTaskQuery().taskCandidateGroup("managers").list(); System.out.println("你有 " + tasks.size() + " 个待办任务:"); Task task = tasks.get(0); Map<String, Object> variables = new HashMap<String, Object>(); variables.put("approved", true); taskService.complete(task.getId(), variables); } public void testExportProcessImg() throws IOException{ HistoryService historyService = processEngine.getHistoryService(); RepositoryService repositoryService = processEngine.getRepositoryService(); RuntimeService runtimeService = processEngine.getRuntimeService(); List<HistoricProcessInstance> his = historyService.createHistoricProcessInstanceQuery().processDefinitionKey("holidayRequest").list(); for (HistoricProcessInstance ins : his){ System.out.println(String.format("%s : %s", ins.getId(), ins.getDurationInMillis())); } HistoricProcessInstance instance = his.get(0); BpmnModel bpmnModel = repositoryService.getBpmnModel(instance.getProcessDefinitionId()); DefaultProcessDiagramGenerator defaultProcessDiagramGenerator = new DefaultProcessDiagramGenerator(); List<String> highLightedActivities = runtimeService.getActiveActivityIds(instance.getId()); List<String> highLightedFlows = Collections.emptyList(); InputStream in = defaultProcessDiagramGenerator.generateDiagram(bpmnModel, "png", highLightedActivities, highLightedFlows, false); byte[] data = IOUtils.toByteArray(in); FileUtils.writeByteArrayToFile(new File("img.png"), data); } public void testQueryHisProcess() throws IOException{ HistoryService historyService = processEngine.getHistoryService(); RepositoryService repositoryService = processEngine.getRepositoryService(); RuntimeService runtimeService = processEngine.getRuntimeService(); List<HistoricTaskInstance> list = historyService .createHistoricTaskInstanceQuery() //.processDefinitionKey("holidayRequest") .processInstanceId("2501") .finished() .list(); for (HistoricTaskInstance ins : list){ System.out.println(String.format("%s : %s, %s, %s", ins.getId(), ins.getCreateTime(), ins.getEndTime(), ins.getAssignee())); } } public void testDefineUtils() throws Exception{ RepositoryService service = processEngine.getRepositoryService(); ProcessDefinition define = FlowDefineUtils.getFlowDefine("holidayRequest", service); System.out.println(FlowDefineUtils.getStartEventVariables(define, service)); System.out.println(FlowDefineUtils.getUserTaskVariables(define, "approveTask", service)); System.out.println(FlowDefineUtils.getStartEventService(define, service)); System.out.println(FlowDefineUtils.getUserTaskService(define, "approveTask", service)); System.out.println(FlowDefineUtils.getStartEventInitService(define, service)); System.out.println(FlowDefineUtils.getUserTaskInitService(define, "approveTask", service)); } } 3.修改****.bpmn20.xml
<?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:flowable="http://flowable.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" xmlns:ilot="http://ilotterytech.com/bpmn" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://flowable.org/test"> <!--<collaboration id="Collaboration">--> <!--<participant id="sid-FCF94A2B-138F-406B-BA6C-2860A5329290" name="银行对账文件流程" processRef="process"></participant>--> <!--</collaboration>--> <process id="stationFee" name="网点保险费流程" isExecutable="true"> <extensionElements> <flowable:eventListener delegateExpression="${flowableMainEventListener}" events="TASK_COMPLETED,PROCESS_COMPLETED" /> </extensionElements> <laneSet id="laneSet_process"> <lane id="sid-FF8E9FD8-1C1B-4E2D-98BC-A083D4E947D1" name="市场（营销）管理部→技术管理部"> <flowNodeRef>sid-0AA904C1-154A-43E8-B17D-1445DDD5A58B</flowNodeRef> <flowNodeRef>sid-5342E247-1EF8-413A-A28D-6AA281753F76</flowNodeRef> <flowNodeRef>sid-EFECD6EF-42DA-4AD5-AF28-36183BD182B1</flowNodeRef> <flowNodeRef>sid-946F88C4-6C74-494E-B27A-2490CF613F62</flowNodeRef> <flowNodeRef>sid-3EABB94F-3180-42F0-AAC7-84BDDBC16BC3</flowNodeRef> </lane> </laneSet> <startEvent id="sid-0AA904C1-154A-43E8-B17D-1445DDD5A58B" name="导入网点保险费列表"> <extensionElements> <ilot:init service="insuranceFeeService.getStartInitEvent" /> <ilot:page name="startBank.html" route="startCheckAccount.financeStartCheck"/> <ilot:service form="InsurancePremiumForm" invoke="insuranceFeeService.saveInsuranceFee" /> </extensionElements> </startEvent> <userTask id="sid-5342E247-1EF8-413A-A28D-6AA281753F76" name="主机系统处理" flowable:candidateGroups="技术管理部"> <extensionElements> <ilot:init service="insuranceFeeService.getHostProcessing" /> <ilot:page name="start.html" route="operCheckAccount.financeOperCheck"/> <ilot:service form="InsurancePremiumHostForm" invoke="insuranceFeeService.saveHostProcessingSubmit" /> </extensionElements> </userTask> <endEvent id="sid-EFECD6EF-42DA-4AD5-AF28-36183BD182B1"></endEvent> <sequenceFlow id="sid-946F88C4-6C74-494E-B27A-2490CF613F62" sourceRef="sid-5342E247-1EF8-413A-A28D-6AA281753F76" targetRef="sid-EFECD6EF-42DA-4AD5-AF28-36183BD182B1"></sequenceFlow> <sequenceFlow id="sid-3EABB94F-3180-42F0-AAC7-84BDDBC16BC3" sourceRef="sid-0AA904C1-154A-43E8-B17D-1445DDD5A58B" targetRef="sid-5342E247-1EF8-413A-A28D-6AA281753F76"></sequenceFlow> </process> <bpmndi:BPMNDiagram id="BPMNDiagram_Collaboration"> <bpmndi:BPMNPlane bpmnElement="Collaboration" id="BPMNPlane_Collaboration"> <bpmndi:BPMNShape bpmnElement="sid-6465C1B4-6357-4329-AD60-1FCAF7F68DA4" id="BPMNShape_sid-6465C1B4-6357-4329-AD60-1FCAF7F68DA4"> <omgdc:Bounds height="249.0" width="937.8" x="0.0" y="15.0"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNShape bpmnElement="sid-FF8E9FD8-1C1B-4E2D-98BC-A083D4E947D1" id="BPMNShape_sid-FF8E9FD8-1C1B-4E2D-98BC-A083D4E947D1"> <omgdc:Bounds height="249.0" width="907.8" x="30.0" y="15.0"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNShape bpmnElement="sid-0AA904C1-154A-43E8-B17D-1445DDD5A58B" id="BPMNShape_sid-0AA904C1-154A-43E8-B17D-1445DDD5A58B"> <omgdc:Bounds height="30.0" width="30.0" x="90.0" y="124.5"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNShape bpmnElement="sid-5342E247-1EF8-413A-A28D-6AA281753F76" id="BPMNShape_sid-5342E247-1EF8-413A-A28D-6AA281753F76"> <omgdc:Bounds height="80.0" width="100.0" x="495.0" y="99.5"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNShape bpmnElement="sid-EFECD6EF-42DA-4AD5-AF28-36183BD182B1" id="BPMNShape_sid-EFECD6EF-42DA-4AD5-AF28-36183BD182B1"> <omgdc:Bounds height="28.0" width="28.0" x="706.8" y="125.5"></omgdc:Bounds> </bpmndi:BPMNShape> <bpmndi:BPMNEdge bpmnElement="sid-946F88C4-6C74-494E-B27A-2490CF613F62" id="BPMNEdge_sid-946F88C4-6C74-494E-B27A-2490CF613F62"> <omgdi:waypoint x="594.9499999999894" y="139.5"></omgdi:waypoint> <omgdi:waypoint x="706.8" y="139.5"></omgdi:waypoint> </bpmndi:BPMNEdge> <bpmndi:BPMNEdge bpmnElement="sid-3EABB94F-3180-42F0-AAC7-84BDDBC16BC3" id="BPMNEdge_sid-3EABB94F-3180-42F0-AAC7-84BDDBC16BC3"> <omgdi:waypoint x="119.94999990555667" y="139.5"></omgdi:waypoint> <omgdi:waypoint x="494.999999999622" y="139.5"></omgdi:waypoint> </bpmndi:BPMNEdge> </bpmndi:BPMNPlane> </bpmndi:BPMNDiagram> </definitions> 4.书写相应的entity , form , service，repository
package com.ilotterytech.bwlbis.station.insurance.entity; import com.ilotterytech.common.core.entity.UseableEntity; import lombok.Getter; import lombok.Setter; import javax.persistence.*; import java.sql.Timestamp; /** * @ Author : zhukaixin * @ Date : 2019-04-28-16:05 * @ Desc : */ @Setter @Getter @Entity @Table( name ="w_station_insurance_premium" ) public class InsurancePremium extends UseableEntity { /** * id主键 */ @Id @GeneratedValue @Column(name = "id" ) private Long id; /** * 时间 */ @Column(name = "date" ) private Timestamp date; /** * 保险费 */ // @Column(name = "money" ) // private int money; /** * 备注 */ @Column(name = "remark" ) private String remark; /** * station_code */ // @Column(name = "station_code" ) // private String stationCode; /** * dept */ @Column(name = "dept" ) private Long dept; /** * proc_instance_id */ @Column(name = "proc_instance_id" ) private String procInstanceId; } package com.ilotterytech.bwlbis.station.insurance.form; import com.ilotterytech.bwlbis.flowable.entity.FlowStartForm; import com.ilotterytech.component.flowable.form.FlowableVariableFormBase; import lombok.Data; /** * @ Author : zhukaixin * @ Date : 2019-04-28-16:47 * @ Desc : */ @Data public class InsurancePremiumForm extends FlowableVariableFormBase implements FlowStartForm { private Long file; /** * 备注 */ private String remark; @Override public String getTargetSiteName() { return null; } @Override public String getTargetSiteCode() { return null; } @Override public String getTargetAddress() { return null; } @Override public String getCategory() { return "网点保险费"; } } package com.ilotterytech.bwlbis.station.insurance.form; import com.ilotterytech.component.flowable.form.FlowableVariableFormBase; import lombok.Data; /** * @ Author : zhukaixin * @ Date : 2019-04-28-19:17 * @ Desc : */ @Data public class InsurancePremiumHostForm extends FlowableVariableFormBase { /** * 备注 */ private String remark; private Long insurancePremiumId; /** * 确认主机操作 */ private Boolean sureFlag; } package com.ilotterytech.bwlbis.station.insurance.repository; import com.ilotterytech.bwlbis.station.insurance.entity.InsurancePremium; import com.ilotterytech.framework.rest.repository.RestRepository; import org.springframework.stereotype.Repository; /** * @ Author : zhukaixin * @ Date : 2019-04-28-16:07 * @ Desc : */ @Repository public interface InsurancePremiumRepository extends RestRepository<InsurancePremium, Long> { InsurancePremium getByProcInstanceId(String procInstanceId); } package com.ilotterytech.bwlbis.station.insurance.service; import com.ilotterytech.bwlbis.base.attach.entity.Attach; import com.ilotterytech.bwlbis.base.attach.service.AttachService; import com.ilotterytech.bwlbis.base.hostsure.entity.HostSure; import com.ilotterytech.bwlbis.base.hostsure.service.HostSureService; import com.ilotterytech.bwlbis.station.insurance.entity.InsurancePremium; import com.ilotterytech.bwlbis.station.insurance.form.InsurancePremiumForm; import com.ilotterytech.bwlbis.station.insurance.form.InsurancePremiumHostForm; import com.ilotterytech.bwlbis.station.insurance.repository.InsurancePremiumRepository; import com.ilotterytech.component.flowable.entity.FlowableEntity; import com.ilotterytech.component.flowable.service.FlowableTaskService; import com.ilotterytech.component.flowable.service.ServiceInvokeContext; import com.ilotterytech.framework.rest.service.DefaultRestService; import org.apache.commons.collections.map.HashedMap; import org.springframework.beans.BeanUtils; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Transactional; import javax.annotation.Resource; import java.util.HashMap; import java.util.List; import java.util.Map; /** * @ Author : zhukaixin * @ Date : 2019-04-28-15:55 * @ Desc : */ @Service @Transactional public class InsuranceFeeService extends DefaultRestService<InsurancePremium, Long, InsurancePremiumRepository> implements FlowableTaskService { @Resource private AttachService attachService; @Resource private HostSureService hostSureService; /** * 初始化页面 */ public Map<String,Object> getStartInitEvent(ServiceInvokeContext context){ Map<String,Object> map= new HashedMap(); map.put("person",context.getUserId()); map.put("dept",context.getUserDeptId()); return map; } /** * 提交修改 * @param entity * @param context */ public void saveInsuranceFee(FlowableEntity entity, ServiceInvokeContext context){ InsurancePremiumForm insurancePremiumForm = (InsurancePremiumForm)context.getPageForm(); InsurancePremium insurancePremium = new InsurancePremium(); Attach attach = attachService.findOne(insurancePremiumForm.getFile()); BeanUtils.copyProperties(insurancePremiumForm,insurancePremium); insurancePremium.setProcInstanceId(context.getProcessInstanceId()); insurancePremium.setDept(context.getUserDeptId()); insurancePremium.setRemark(insurancePremiumForm.getRemark()); repository.save(insurancePremium); attach.setFId(insurancePremium.getId()); attach.setFType(InsurancePremium.class.getSimpleName()); attachService.save(attach); } /** * 技术部主机处理 */ public Map<String,Object> getHostProcessing(FlowableEntity entity, ServiceInvokeContext context){ InsurancePremium insurancePremium = repository.getByProcInstanceId(entity.getProcInstanceId()); List<Attach> attach = attachService.getAttachByFidAndFType(insurancePremium.getId(),InsurancePremium.class); Map<String,Object> map = new HashMap<>(); map.put("insurancePremium",insurancePremium); map.put("attach",attach); return map; } /** * * 技术部主机处理提交修改 * @param entity * @param context */ public void saveHostProcessingSubmit(FlowableEntity entity, ServiceInvokeContext context){ InsurancePremiumHostForm insurancePremiumsForm = (InsurancePremiumHostForm)context.getPageForm(); InsurancePremium insurancePremium = repository.findOne(insurancePremiumsForm.getInsurancePremiumId()); HostSure hostSure = new HostSure(); BeanUtils.copyProperties(insurancePremiumsForm,hostSure); hostSure.setProcInstanceId(context.getProcessInstanceId()); hostSure.setSid(insurancePremium.getId()); hostSure.setStype(InsurancePremium.class.getSimpleName()); hostSureService.saveHostSure(hostSure); } } 5.根据service中的方法写相应的流程顺序
6.修改****.bpmn20.xml 每次修改都要重新修改数据库中的对应表数据