拓普网站建设如何找到网络公关公司

目录

一、环境搭建（Spring Boot 2.x）

1.1 依赖配置

1.2 配置文件

二、流程定义与部署

2.1 创建BPMN文件（leave.bpmn）

2.2 流程部署服务

三、流程操作核心实现

3.1 启动流程实例

3.2 查询待办任务

四、审批流程处理

4.1 通过审批

4.2 驳回流程

4.3 撤回流程

五、流程状态管理

5.1 流程历史查询

5.2 流程图生成

六、完整流程示例

6.1 请假流程时序图

七、常见问题解决方案

7.1 流程版本控制

7.2 流程变量管理

结语

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一、环境搭建（Spring Boot 2.x）

1.1 依赖配置

<dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.activiti</groupId><artifactId>activiti-spring-boot-starter-basic</artifactId><version>5.22.0</version></dependency><dependency><groupId>com.h2database</groupId><artifactId>h2</artifactId><scope>runtime</scope></dependency>
</dependencies>

1.2 配置文件

spring:activiti:database-schema-update: truehistory-level: fullcheck-process-definitions: falsedatasource:url: jdbc:h2:mem:testdbdriverClassName: org.h2.Driverusername: sapassword: 

---

二、流程定义与部署

2.1 创建BPMN文件（leave.bpmn）

<process id="leaveProcess" name="请假流程"><startEvent id="start"/><userTask id="apply" name="提交申请" activiti:assignee="${applicant}"/><userTask id="managerApprove" name="经理审批" activiti:assignee="${approver}"/><exclusiveGateway id="exclusiveGw"/><sequenceFlow sourceRef="start" targetRef="apply"/><sequenceFlow sourceRef="apply" targetRef="managerApprove"/><sequenceFlow sourceRef="managerApprove" targetRef="exclusiveGw"/><endEvent id="end"/>
</process>

2.2 流程部署服务

@Service
public class ProcessService {@Autowiredprivate RepositoryService repositoryService;public void deployProcess(String bpmnPath) {repositoryService.createDeployment().addClasspathResource(bpmnPath).deploy();}
}

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三、流程操作核心实现

3.1 启动流程实例

@Service
public class RuntimeService {@Autowiredprivate org.activiti.engine.RuntimeService activitiRuntimeService;public String startProcess(String processKey, String businessKey, Map<String, Object> variables) {return activitiRuntimeService.startProcessInstanceByKey(processKey, businessKey, variables).getId();}
}

3.2 查询待办任务

@Service 
public class TaskService {@Autowiredprivate org.activiti.engine.TaskService activitiTaskService;public List<Task> getTasksByUser(String userId) {return activitiTaskService.createTaskQuery().taskAssignee(userId).list();}
}

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四、审批流程处理

4.1 通过审批

public void completeTask(String taskId, Map<String, Object> variables) {activitiTaskService.complete(taskId, variables);
}

4.2 驳回流程

public void rejectTask(String taskId, String targetTaskKey) {Task currentTask = activitiTaskService.createTaskQuery().taskId(taskId).singleResult();activitiRuntimeService.createProcessInstanceModification(currentTask.getProcessInstanceId()).cancelActivityInstance(currentTask.getExecutionId()).startBeforeActivity(targetTaskKey).execute();
}

4.3 撤回流程

public void withdrawProcess(String processInstanceId) {activitiRuntimeService.deleteProcessInstance(processInstanceId, "用户撤回");
}

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五、流程状态管理

5.1 流程历史查询

public List<HistoricActivityInstance> getHistory(String processInstanceId) {return historyService.createHistoricActivityInstanceQuery().processInstanceId(processInstanceId).orderByHistoricActivityInstanceStartTime().asc().list();
}

5.2 流程图生成

public InputStream generateDiagram(String processInstanceId) {ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(processInstanceId).singleResult();BpmnModel bpmnModel = repositoryService.getBpmnModel(processInstance.getProcessDefinitionId());return processDiagramGenerator.generateDiagram(bpmnModel, "png", runtimeService.getActiveActivityIds(processInstanceId));
}

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六、完整流程示例

6.1 请假流程时序图

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七、常见问题解决方案

7.1 流程版本控制

public List<ProcessDefinition> getProcessVersions(String processKey) {return repositoryService.createProcessDefinitionQuery().processDefinitionKey(processKey).orderByProcessDefinitionVersion().desc().list();
}

7.2 流程变量管理

// 设置变量
taskService.setVariable(taskId, "approveComment", "同意申请");// 获取变量
String comment = (String) taskService.getVariable(taskId, "approveComment");

结语

最佳实践建议：

1. 使用@Transactional注解保证流程操作与业务数据