spring boot整合activiti
**Spring Boot 整合 Activiti 知识点详解**
Activiti 是一个开源的工作流和业务流程管理（BPM）系统，它提供了强大的流程定义、执行和监控能力。Spring Boot 则是基于 Spring 框架的轻量级开发工具，简化了 Spring 应用的初始搭建以及开发过程。将两者结合，可以方便地在 Spring Boot 应用中集成工作流功能，实现高效灵活的业务流程控制。
**1. 引入依赖**
我们需要在项目的 `pom.xml` 文件中添加 Activiti 和 Spring Boot 对应的依赖。通常会引入 `activiti-spring` 和 `spring-boot-starter-data-jpa` 以便于与数据库交互：
```xml
org.activiti
activiti-spring
6.x.y
org.springframework.boot
spring-boot-starter-data-jpa
com.h2database
h2
runtime
```
**2. 配置数据库连接**
在 `application.properties` 文件中配置数据库连接信息，例如使用 H2 数据库：
```properties
spring.datasource.url=jdbc:h2:mem:activiti;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=
spring.jpa.hibernate.ddl-auto=update
```
**3. 创建 Activiti 配置类**
创建一个配置类来初始化 Activiti 引擎，并配置事务管理：
```java
@Configuration
public class ActivitiConfig {
@Autowired
private DataSource dataSource;
@Bean
public ProcessEngineConfiguration processEngineConfiguration() {
SpringProcessEngineConfiguration config = new SpringProcessEngineConfiguration();
config.setDataSource(dataSource);
config.setDatabaseSchemaUpdate("true");
return config;
}
@Bean
public ProcessEngine processEngine(ProcessEngineConfiguration processEngineConfiguration) {
return processEngineConfiguration.buildProcessEngine();
}
@Bean
public RepositoryService repositoryService(ProcessEngine processEngine) {
return processEngine.getRepositoryService();
}
// 其他服务如 runtimeService, taskService, identityService 等...
}
```
**4. 定义流程模型**
使用 Activiti 的设计工具（如 Activiti Modeler）或者 BPMN 2.0 XML 手动编写流程定义。将 BPMN 文件存放在项目资源目录下的 `processes` 目录，Spring Boot 启动时会自动部署到 Activiti 引擎。
**5. 创建业务接口和实现**
定义与工作流相关的业务接口，比如启动流程、完成任务等，并实现这些接口。可以使用 Activiti 提供的 Service API 进行操作：
```java
@Service
public class WorkflowService {
@Autowired
private RuntimeService runtimeService;
@Autowired
private TaskService taskService;
public void startProcess(String processDefinitionKey, Map variables) {
runtimeService.startProcessInstanceByKey(processDefinitionKey, variables);
}
public void completeTask(String taskId, Map variables) {
taskService.complete(taskId, variables);
}
// 其他业务方法...
}
```
**6. 控制器层调用**
在控制器层调用业务接口，实现流程的启动和任务的处理：
```java
@RestController
@RequestMapping("/workflow")
public class WorkflowController {
@Autowired
private WorkflowService workflowService;
@PostMapping("/start")
public void startWorkflow(@RequestParam String processDefinitionKey, @RequestBody Map variables) {
workflowService.startProcess(processDefinitionKey, variables);
}
@PostMapping("/complete-task")
public void completeTask(@RequestParam String taskId, @RequestBody Map variables) {
workflowService.completeTask(taskId, variables);
}
}
```
**7. 实现用户权限及任务分配**
Activiti 支持多种方式实现用户与任务的关联，可以通过实现 `UserCallable` 接口或使用 `DelegationState` 进行任务委托。此外，可结合 Spring Security 或其他权限框架进行权限控制。
**8. 监控和报表**
Activiti 提供了丰富的监控和报表功能，可以通过 Activiti Explorer 或自定义页面查看流程实例、任务状态、历史记录等信息。
通过以上步骤，我们可以实现 Spring Boot 与 Activiti 的深度融合，轻松地在应用中引入工作流管理，使业务逻辑更加灵活可控。在提供的压缩包 `springBoot-with-activiti` 中，你应该能找到完整的示例代码和详细步骤，以便参考和学习。
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