工作流学习之入门demo

  1 /**
  2  * Copyright (C), 2015-2018, XXX有限公司
  3  * FileName: DemoMain
  4  * Author:   happy
  5  * Date:     2018/6/23 16:33
  6  * Description:
  7  * History:
  8  * <author>          <time>          <version>          <desc>
  9  * 作者姓名           修改时间           版本号              描述
 10  */
 11 package com.imooc.activiti.helloworld;
 12 
 13 import com.google.common.collect.Maps;
 14 import org.activiti.engine.*;
 15 import org.activiti.engine.form.FormProperty;
 16 import org.activiti.engine.form.TaskFormData;
 17 import org.activiti.engine.impl.form.DateFormType;
 18 import org.activiti.engine.impl.form.StringFormType;
 19 import org.activiti.engine.repository.Deployment;
 20 import org.activiti.engine.repository.DeploymentBuilder;
 21 import org.activiti.engine.repository.ProcessDefinition;
 22 import org.activiti.engine.runtime.ProcessInstance;
 23 import org.activiti.engine.task.Task;
 24 import org.slf4j.Logger;
 25 import org.slf4j.LoggerFactory;
 26 
 27 import java.text.ParseException;
 28 import java.text.SimpleDateFormat;
 29 import java.util.Date;
 30 import java.util.List;
 31 import java.util.Map;
 32 import java.util.Scanner;
 33 
 34 /**
 35  * 〈一句话功能简述〉<br>
 36  * 〈〉
 37  *
 38  * @author happy
 39  * @create 2018/6/23
 40  * @since 1.0.0
 41  */
 42 public class DemoMain {
 43 
 44     public static final Logger log = LoggerFactory.getLogger(DemoMain.class);
 45 
 46     public static void main(String[] args) {
 47 
 48         log.info("启动我们的程序");
 49 
 50         //创建流程引擎
 51         ProcessEngine processEngine = getProcessEngine();
 52 
 53         //部署流程定义文件
 54         ProcessDefinition processDefinition = getProcessDefinition(processEngine);
 55 
 56         //启动运行流程
 57         final ProcessInstance[] processInstance = {getProcessInstance(processEngine, processDefinition)};
 58 
 59         //处理流程任务
 60         Scanner scanner = new Scanner(System.in);
 61 
 62         while (processInstance[0] != null && !processInstance[0].isEnded()) {
 63 
 64             TaskService taskService = processEngine.getTaskService();
 65             List<Task> taskList = taskService.createTaskQuery().list();
 66             log.info("待处理任务数量 [{}]", taskList.size());
 67             taskList.stream().forEach(task -> {
 68                 log.info("待处理任务 [{}]", task.getName());
 69                 FormService formService = processEngine.getFormService();
 70                 TaskFormData taskFormData = formService.getTaskFormData(task.getId());
 71                 List<FormProperty> formProperties = taskFormData.getFormProperties();
 72                 Map<String, Object> variables = Maps.newHashMap();
 73                 formProperties.stream().forEach(property -> {
 74                     String line = null;
 75                     if (StringFormType.class.isInstance(property.getType())) {
 76                         log.info("请输入 {} ？", property.getName());
 77                         line = scanner.nextLine();
 78                         variables.put(property.getId(), line);
 79                     } else if (DateFormType.class.isInstance(property.getType())) {
 80                         log.info("请输入 {} ？ 格式 （yyyy-MM-dd）", property.getName());
 81                         line = scanner.nextLine();
 82                         SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
 83                         Date date = null;
 84                         try {
 85                             date = dateFormat.parse(line);
 86                         } catch (ParseException e) {
 87                             e.printStackTrace();
 88                         }
 89                         variables.put(property.getId(), date);
 90                     } else {
 91                         log.info("类型暂不支持 {}", property.getType());
 92                     }
 93                     log.info("您输入的内容是 [{}]", line);
 94                 });
 95                 taskService.complete(task.getId(), variables);
 96                     //Variable used in lambda expression should be final or effectively final
                        //(解决参考 https://www.jianshu.com/p/d957dd5560e8)
 97                 processInstance[0] = processEngine.getRuntimeService().createProcessInstanceQuery().
 98                         processInstanceId(processInstance[0].getId()).singleResult();
 99             });
100 
101         }
102 
103         log.info("结束我们的程序");
104 
105     }
106 
107     private static ProcessInstance getProcessInstance(ProcessEngine processEngine, ProcessDefinition processDefinition) {
108         RuntimeService runtimeService = processEngine.getRuntimeService();
109         ProcessInstance processInstance = runtimeService.startProcessInstanceById(processDefinition.getId());
110         log.info("启动流程 {}", processInstance.getProcessDefinitionKey());
111         return processInstance;
112     }
113 
114     private static ProcessDefinition getProcessDefinition(ProcessEngine processEngine) {
115         RepositoryService repositoryService = processEngine.getRepositoryService();
116         DeploymentBuilder deploymentBuilder = repositoryService.createDeployment();
117         deploymentBuilder.addClasspathResource("second_approve.bpmn20.xml");
118         Deployment deployment = deploymentBuilder.deploy();
119         String deploymentId = deployment.getId();
120         ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery()
121                 .deploymentId(deploymentId)
122                 .singleResult();
123 
124         log.info("流程定义文件 {},id {}", processDefinition.getName(), processDefinition.getId());
125         return processDefinition;
126     }
127 
128     private static ProcessEngine getProcessEngine() {
129         ProcessEngineConfiguration cfg = ProcessEngineConfiguration.createStandaloneInMemProcessEngineConfiguration();
130         ProcessEngine processEngine = cfg.buildProcessEngine();
131         String name = processEngine.getName();
132         String version = ProcessEngine.VERSION;
133 
134         log.info("流程引擎的名称 {},版本号 {}", name, version);
135         return processEngine;
136     }
137 
138 }

<?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="second_approve" name="二级审批流程" isExecutable="true">
    <startEvent id="startEvent" name="开始"></startEvent>
    <userTask id="submitForm" name="填写审批信息">
      <extensionElements>
        <activiti:formProperty id="message" name="申请信息" type="string" required="true"></activiti:formProperty>
        <activiti:formProperty id="name" name="申请人姓名" type="string" required="true"></activiti:formProperty>
        <activiti:formProperty id="submitTime" name="提交时间" type="date" datePattern="yyyy-MM-dd" required="true"></activiti:formProperty>
        <activiti:formProperty id="submitType" name="确认申请" type="string" required="true"></activiti:formProperty>
      </extensionElements>
    </userTask>
    <sequenceFlow id="flow1" sourceRef="startEvent" targetRef="submitForm"></sequenceFlow>
    <exclusiveGateway id="decideSubmit" name="提交or取消"></exclusiveGateway>
    <sequenceFlow id="flow2" sourceRef="submitForm" targetRef="decideSubmit"></sequenceFlow>
    <endEvent id="endEventCancle" name="结束"></endEvent>
    <sequenceFlow id="flow3" sourceRef="decideSubmit" targetRef="endEventCancle">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${submitType=="N" || submitType=="n"}]]></conditionExpression>
    </sequenceFlow>
    <userTask id="tlApprove" name="主管审批">
      <extensionElements>
        <activiti:formProperty id="tlApprove" name="主管审批结果" type="string" required="true"></activiti:formProperty>
        <activiti:formProperty id="tlMessage" name="主管备注" type="string" required="true"></activiti:formProperty>
      </extensionElements>
    </userTask>
    <sequenceFlow id="flow4" sourceRef="decideSubmit" targetRef="tlApprove">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${submitType=="Y" || submitType=="y"}]]></conditionExpression>
    </sequenceFlow>
    <exclusiveGateway id="decideTlApprove" name="主管审批校验"></exclusiveGateway>
    <sequenceFlow id="flow5" sourceRef="tlApprove" targetRef="decideTlApprove"></sequenceFlow>
    <userTask id="hr_approve" name="人事审批">
      <extensionElements>
        <activiti:formProperty id="hrApprove" name="人事审批结果" type="string" required="true"></activiti:formProperty>
        <activiti:formProperty id="hrMessage" name="人事审批备注" type="string" required="true"></activiti:formProperty>
      </extensionElements>
    </userTask>
    <sequenceFlow id="flow6" sourceRef="decideTlApprove" targetRef="hr_approve">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${tlApprove=="Y" || tlApprove=="y"}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow10" sourceRef="decideTlApprove" targetRef="submitForm">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${tlApprove=="N" || tlApprove=="n"}]]></conditionExpression>
    </sequenceFlow>
    <exclusiveGateway id="decideHrApprove" name="人事审批校验"></exclusiveGateway>
    <sequenceFlow id="flow11" sourceRef="hr_approve" targetRef="decideHrApprove"></sequenceFlow>
    <endEvent id="endEvent" name="结束"></endEvent>
    <sequenceFlow id="flow12" sourceRef="decideHrApprove" targetRef="endEvent">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${hrApprove=="Y" ||hrApprove=="y"}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow13" sourceRef="decideHrApprove" targetRef="submitForm">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${hrApprove=="N" ||hrApprove=="n"}]]></conditionExpression>
    </sequenceFlow>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_second_approve">
    <bpmndi:BPMNPlane bpmnElement="second_approve" id="BPMNPlane_second_approve">
      <bpmndi:BPMNShape bpmnElement="startEvent" id="BPMNShape_startEvent">
        <omgdc:Bounds height="35.0" width="35.0" x="50.0" y="130.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="submitForm" id="BPMNShape_submitForm">
        <omgdc:Bounds height="55.0" width="105.0" x="130.0" y="120.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="decideSubmit" id="BPMNShape_decideSubmit">
        <omgdc:Bounds height="40.0" width="40.0" x="280.0" y="128.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="endEventCancle" id="BPMNShape_endEventCancle">
        <omgdc:Bounds height="35.0" width="35.0" x="400.0" y="230.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="tlApprove" id="BPMNShape_tlApprove">
        <omgdc:Bounds height="55.0" width="105.0" x="365.0" y="121.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="decideTlApprove" id="BPMNShape_decideTlApprove">
        <omgdc:Bounds height="40.0" width="40.0" x="515.0" y="129.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="hr_approve" id="BPMNShape_hr_approve">
        <omgdc:Bounds height="55.0" width="105.0" x="601.0" y="123.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="decideHrApprove" id="BPMNShape_decideHrApprove">
        <omgdc:Bounds height="40.0" width="40.0" x="751.0" y="131.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="endEvent" id="BPMNShape_endEvent">
        <omgdc:Bounds height="35.0" width="35.0" x="836.0" y="134.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
        <omgdi:waypoint x="85.0" y="147.0"></omgdi:waypoint>
        <omgdi:waypoint x="130.0" y="147.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">
        <omgdi:waypoint x="235.0" y="147.0"></omgdi:waypoint>
        <omgdi:waypoint x="280.0" y="148.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3">
        <omgdi:waypoint x="300.0" y="168.0"></omgdi:waypoint>
        <omgdi:waypoint x="299.0" y="247.0"></omgdi:waypoint>
        <omgdi:waypoint x="400.0" y="247.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow4" id="BPMNEdge_flow4">
        <omgdi:waypoint x="320.0" y="148.0"></omgdi:waypoint>
        <omgdi:waypoint x="365.0" y="148.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow5" id="BPMNEdge_flow5">
        <omgdi:waypoint x="470.0" y="148.0"></omgdi:waypoint>
        <omgdi:waypoint x="515.0" y="149.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow6" id="BPMNEdge_flow6">
        <omgdi:waypoint x="555.0" y="149.0"></omgdi:waypoint>
        <omgdi:waypoint x="601.0" y="150.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow10" id="BPMNEdge_flow10">
        <omgdi:waypoint x="535.0" y="169.0"></omgdi:waypoint>
        <omgdi:waypoint x="535.0" y="296.0"></omgdi:waypoint>
        <omgdi:waypoint x="182.0" y="296.0"></omgdi:waypoint>
        <omgdi:waypoint x="182.0" y="175.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow11" id="BPMNEdge_flow11">
        <omgdi:waypoint x="706.0" y="150.0"></omgdi:waypoint>
        <omgdi:waypoint x="751.0" y="151.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow12" id="BPMNEdge_flow12">
        <omgdi:waypoint x="791.0" y="151.0"></omgdi:waypoint>
        <omgdi:waypoint x="836.0" y="151.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow13" id="BPMNEdge_flow13">
        <omgdi:waypoint x="771.0" y="131.0"></omgdi:waypoint>
        <omgdi:waypoint x="770.0" y="50.0"></omgdi:waypoint>
        <omgdi:waypoint x="182.0" y="50.0"></omgdi:waypoint>
        <omgdi:waypoint x="182.0" y="120.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

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原文地址：https://www.cnblogs.com/java-le/p/9219191.html

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