Spring Boot + flowable 完美结合，快速实现工作流

<?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-insmtece" 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" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.flowable.org/processdef">
  <process id="leave_approval" name="请假审批" isExecutable="true">
    <startEvent id="start" name="开始" flowable:initiator="startuser" flowable:formFieldValidation="true">startEvent>
    <userTask id="stu_task" name="学生" flowable:candidateGroups="stu_group" flowable:formFieldValidation="true">userTask>
    <sequenceFlow id="flow1" sourceRef="start" targetRef="stu_task">sequenceFlow>
    <userTask id="te_task" name="老师" flowable:candidateGroups="te_group" flowable:formFieldValidation="true">userTask>
    <exclusiveGateway id="getway1" name="网关1">exclusiveGateway>
    <userTask id="mte_task" name="校长" flowable:candidateGroups="mte_group" flowable:formFieldValidation="true">userTask>
    <exclusiveGateway id="getway2" name="网关2">exclusiveGateway>
    <endEvent id="end" name="结束">endEvent>
    <sequenceFlow id="flow1" name="请假" sourceRef="stu_task" targetRef="te_task" skipExpression="${command=='agree'}">sequenceFlow>
    <sequenceFlow id="flow3_1" name="同意" sourceRef="getway1" targetRef="mte_task">
      <conditionExpression xsi:type="tFormalExpression">[CDATA[${command=='agree'}]]>conditionExpression>
    sequenceFlow>
    <sequenceFlow id="flow2" name="审批" sourceRef="te_task" targetRef="getway1">sequenceFlow>
    <sequenceFlow id="flow3_2" name="拒绝" sourceRef="getway1" targetRef="stu_task">
      <conditionExpression xsi:type="tFormalExpression">[CDATA[${command=='refuse'}]]>conditionExpression>
    sequenceFlow>
    <sequenceFlow id="flow4" name="审批" sourceRef="mte_task" targetRef="getway2">sequenceFlow>
    <sequenceFlow id="flow4_1" name="同意" sourceRef="getway2" targetRef="end" skipExpression="${command=='free'}">
      <conditionExpression xsi:type="tFormalExpression">[CDATA[${command=='agree'}]]>conditionExpression>
    sequenceFlow>
    <sequenceFlow id="flow4_2" name="拒绝" sourceRef="getway2" targetRef="stu_task">
      <conditionExpression xsi:type="tFormalExpression">[CDATA[${command=='refuse'}]]>conditionExpression>
    sequenceFlow>
  process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_leave_approval">
    这里先省略
  bpmndi:BPMNDiagram>
definitions>

<parent>
    <groupId>org.springframework.bootgroupId>
    <artifactId>spring-boot-starter-parentartifactId>
    <version>2.3.0.RELEASEversion>
    <relativePath/> 
parent>

<dependency>
    <groupId>org.flowablegroupId>
    <artifactId>flowable-spring-boot-starterartifactId>
    <version>6.6.0version>
dependency>
<dependency>
    <groupId>mysqlgroupId>
    <artifactId>mysql-connector-javaartifactId>
    <version>5.1.45version>
dependency>

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/flowable?useSSL=false&characterEncoding=UTF-8&serverTimezone=GMT%2B8
    driver-class-name: com.mysql.jdbc.Driver
    username: root
    password: 123456

import lombok.extern.slf4j.Slf4j;
import org.flowable.engine.HistoryService;
import org.flowable.engine.RepositoryService;
import org.flowable.engine.RuntimeService;
import org.flowable.engine.history.HistoricProcessInstance;
import org.flowable.engine.repository.Deployment;
import org.flowable.engine.repository.ProcessDefinition;
import org.flowable.engine.runtime.Execution;
import org.flowable.engine.runtime.ProcessInstance;
import org.flowable.idm.api.Group;
import org.flowable.idm.api.User;
import org.flowable.task.api.Task;
import org.flowable.task.api.history.HistoricTaskInstance;
import org.springframework.beans.factory.annotation.Autowired;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.ZipInputStream;


@Slf4j
public class TestFlowable {

    @Autowired
    private RepositoryService repositoryService;

    @Autowired
    private RuntimeService runtimeService;

    @Autowired
    private HistoryService historyService;

    @Autowired
    private org.flowable.engine.TaskService taskService;

    @Autowired
    private org.flowable.engine.IdentityService identityService;

    public void createDeploymentZip() {

        
        try {
            File zipTemp = new File("f:/leave_approval.bpmn20.zip");
            ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(zipTemp));
            Deployment deployment = repositoryService
                    .createDeployment()
                    .addZipInputStream(zipInputStream)
                    .deploy();
            log.info("部署成功:{}", deployment.getId());
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        
        List<ProcessDefinition> list = repositoryService.createProcessDefinitionQuery().processDefinitionKey("leave_approval").list();
        List<ProcessDefinition> pages = repositoryService.createProcessDefinitionQuery().processDefinitionKey("leave_approval").listPage(1, 30);

        
        String processDefinitionKey = "leave_approval";//流程定义的key,对应请假的流程图
        String businessKey = "schoolleave";//业务代码，根据自己的业务用
        Map<String, Object> variablesDefinition = new HashMap<>();//流程变量，可以自定义扩充
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(processDefinitionKey, businessKey, variablesDefinition);
        log.info("启动成功:{}", processInstance.getId());

        
        List<Execution> executions = runtimeService.createExecutionQuery().processDefinitionKey("leave_approval").list();
        List<Execution> executionPages = runtimeService.createExecutionQuery().processDefinitionKey("leave_approval").listPage(1, 30);
//        runtimeService.deleteProcessInstance(processInstanceId, deleteReason); //删除实例

        
        String candidateGroup = "stu_group"; //候选组 xml文件里面的 flowable:candidateGroups="stu_group"
        List<Task> taskList = taskService.createTaskQuery().taskCandidateGroup(candidateGroup).orderByTaskCreateTime().desc().list();
        for (Task task : taskList) {
            // 申领任务
            taskService.claim(task.getId(), "my");
            // 完成
            taskService.complete(task.getId());
        }

        
        String candidateGroupTe = "te_group"; //候选组 xml文件里面的 flowable:candidateGroups="te_group"
        List<Task> taskListTe = taskService.createTaskQuery().taskCandidateGroup(candidateGroupTe).orderByTaskCreateTime().desc().list();
        for (Task task : taskListTe) {
            // 申领任务
            taskService.claim(task.getId(), "myte");
            // 完成
            Map<String, Object> variables = new HashMap<>();
            variables.put("command","agree"); //携带变量，用于网关流程的条件判定，这里的条件是同意
            taskService.complete(task.getId(), variables);
        }

        
        // 历史流程实例
        List<HistoricProcessInstance> historicProcessList = historyService.createHistoricProcessInstanceQuery().processDefinitionKey("leave_approval").list();
        // 历史任务
        List<HistoricTaskInstance> historicTaskList = historyService.createHistoricTaskInstanceQuery().processDefinitionKey("leave_approval").list();
        // 实例历史变量 , 任务历史变量
        // historyService.createHistoricVariableInstanceQuery().processInstanceId(processInstanceId);
        // historyService.createHistoricVariableInstanceQuery().taskId(taskId);

        // *****************************************************分隔符********************************************************************
        // *****************************************************分隔符********************************************************************
        // 可能还需要的API
        // 移动任务，人为跳转任务
        // runtimeService.createChangeActivityStateBuilder().processInstanceId(processInstanceId)
        //       .moveActivityIdTo(currentActivityTaskId, newActivityTaskId).changeState();

        // 如果在数据库配置了分组和用户，还会用到
        List<User> users = identityService.createUserQuery().list();    //用户查询，用户id对应xml 里面配置的用户
        List<Group> groups = identityService.createGroupQuery().list(); //分组查询，分组id对应xml 里面配置的分组 如 stu_group，te_group 在表里是id的值

        // 另外，每个查询后面都可以拼条件，内置恁多查询，包括模糊查询，大小比较都有
    }
}