Spring Boot整合流程引擎Flowable

Spring Boot整合Flowable BPMN流程引擎，主要涉及到以下几个步骤：

1. 在pom.xml中添加Flowable依赖。
2. 配置Flowable的数据源和事务管理器。
3. 创建流程引擎配置。
4. 启动时自动部署流程定义。

以下是一个简化的示例代码：

pom.xml 添加Flowable依赖：

<dependency>
    <groupId>org.flowable</groupId>
    <artifactId>flowable-spring-boot-starter</artifactId>
    <version>6.7.2</version>
</dependency>

application.properties 或 application.yml 配置数据源和事务管理器：

spring.datasource.url=jdbc:mysql://localhost:3306/flowable?useSSL=false
spring.datasource.username=root
spring.datasource.password=example
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
 
spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect

创建流程引擎配置类：

@Configuration
public class FlowableConfig {
 
    @Bean
    public ProcessEngineFactoryBean processEngine() {
        ProcessEngineFactoryBean processEngine = new ProcessEngineFactoryBean();
        processEngine.setProcessEngineConfiguration(processEngineConfiguration());
        return processEngine;
    }
 
    @Bean
    public SpringProcessEngineConfiguration processEngineConfiguration() {
        SpringProcessEngineConfiguration processEngineConfiguration = new SpringProcessEngineConfiguration();
        processEngineConfiguration.setDataSource(dataSource());
        processEngineConfiguration.setDatabaseSchemaUpdate("true");
        processEngineConfiguration.setTransactionManager(transactionManager());
        processEngineConfiguration.setAsyncExecutorEnabled(false);
        processEngineConfiguration.setJobExecutorActivate(false);
        return processEngineConfiguration;
    }
 
    @Bean
    public DataSourceTransactionManager transactionManager() {
        return new DataSourceTransactionManager(dataSource());
    }
 
    @Bean
    public DataSource dataSource() {
        // 创建数据源，可以使用Spring的数据源配置
        return null;
    }
}

启动时自动部署流程定义：

@Component
public class FlowableProcessDeployer implements CommandLineRunner {
 
    private final RepositoryService repositoryService;
 
    @Autowired
    public FlowableProcessDeployer(RepositoryService repositoryService) {