springboot和activiti5编写一个请假工作流

好的，下面是基于Spring Boot和Activiti 5的请假工作流示例：

1. 首先，创建一个Spring Boot项目，并添加以下依赖：

<dependency>
    <groupId>org.activiti</groupId>
    <artifactId>activiti-spring-boot-starter-basic</artifactId>
    <version>5.22.0</version>
</dependency>

2. 在项目中创建一个Activiti配置类：

@Configuration
public class ActivitiConfig {

    @Bean
    public ProcessEngineConfiguration processEngineConfiguration(DataSource dataSource,
                                                                 PlatformTransactionManager transactionManager) {
        SpringProcessEngineConfiguration processEngineConfiguration = new SpringProcessEngineConfiguration();
        processEngineConfiguration.setDataSource(dataSource);
        processEngineConfiguration.setTransactionManager(transactionManager);
        processEngineConfiguration.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
        return processEngineConfiguration;
    }

    @Bean
    public ProcessEngineFactoryBean processEngineFactoryBean(ProcessEngineConfiguration processEngineConfiguration) {
        ProcessEngineFactoryBean processEngineFactoryBean = new ProcessEngineFactoryBean();
        processEngineFactoryBean.setProcessEngineConfiguration(processEngineConfiguration);
        return processEngineFactoryBean;
    }

    @Bean
    public RepositoryService repositoryService(ProcessEngine processEngine) {
        return processEngine.getRepositoryService();
    }

    @Bean
    public RuntimeService runtimeService(ProcessEngine processEngine) {
        return processEngine.getRuntimeService();
    }

    @Bean
    public TaskService taskService(ProcessEngine processEngine) {
        return processEngine.getTaskService();
    }

    @Bean
    public HistoryService historyService(ProcessEngine processEngine) {
        return processEngine.getHistoryService();
    }

    @Bean
    public ManagementService managementService(ProcessEngine processEngine) {
        return processEngine.getManagementService();
    }

}

3. 创建请假流程的BPMN文件：

请假流程BPMN文件示例：

<?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:activiti="http://activiti.org/bpmn"
             targetNamespace="http://www.activiti.org/test">
    <process id="leaveProcess" name="请假流程" isExecutable="true">
        <startEvent id="startEvent" name="开始"/>
        <userTask id="applyTask" name="请假申请" activiti:assignee="${applyUser}">
            <extensionElements>
                <activiti:taskListener event="create" class="com.example.activiti.listener.ApplyTaskListener"/>
            </extensionElements>
        </userTask>
        <userTask id="auditTask" name="审批" activiti:assignee="${auditUser}">
            <extensionElements>
                <activiti:taskListener event="create" class="com.example.activiti.listener.AuditTaskListener"/>
            </extensionElements>
        </userTask>
        <endEvent id="endEvent" name="结束"/>
        <sequenceFlow id="startToApply" sourceRef="startEvent" targetRef="applyTask"/>
        <sequenceFlow id="applyToAudit" sourceRef="applyTask" targetRef="auditTask"/>
        <sequenceFlow id="auditToEnd" sourceRef="auditTask" targetRef="endEvent"/>
    </process>
</definitions>

4. 创建请假申请和审批任务的TaskListener：

public class ApplyTaskListener implements TaskListener {

    @Override
    public void notify(DelegateTask delegateTask) {
        // 设置任务的候选人
        delegateTask.addCandidateUser("user1");
        delegateTask.addCandidateUser("user2");
    }

}

public class AuditTaskListener implements TaskListener {

    @Override
    public void notify(DelegateTask delegateTask) {
        // 获取请假申请的信息
        String leaveInfo = delegateTask.getVariable("leaveInfo").toString();
        // TODO: 根据请假申请的信息进行审批
    }

}

5. 创建一个请假申请的Controller：

@RestController
@RequestMapping("/leave")
public class LeaveController {

    @Autowired
    private RuntimeService runtimeService;

    @PostMapping("/apply")
    public String apply(@RequestBody LeaveRequest leaveRequest) {
        // 启动请假流程
        Map<String, Object> variables = new HashMap<>();
        variables.put("applyUser", "user");
        variables.put("leaveInfo", leaveRequest.getInfo());
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("leaveProcess", variables);
        return processInstance.getId();
    }

}

6. 创建一个测试用例，模拟审批流程：

@RunWith(SpringRunner.class)
@SpringBootTest
public class LeaveProcessTest {

    @Autowired
    private RuntimeService runtimeService;

    @Autowired
    private TaskService taskService;

    @Test
    public void testLeaveProcess() {
        // 启动请假流程
        Map<String, Object> variables = new HashMap<>();
        variables.put("applyUser", "user");
        variables.put("auditUser", "admin");
        variables.put("leaveInfo", "请假三天");
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("leaveProcess", variables);

        // 审批任务
        Task task = taskService.createTaskQuery().processInstanceId(processInstance.getId()).singleResult();
        taskService.claim(task.getId(), "admin");
        taskService.complete(task.getId());
    }

}

以上就是基于Spring Boot和Activiti 5的请假工作流示例，希望能够帮助到你。