springboot整合activiti6.0.0遇到的坑

刺骨的言语ヽ痛彻心扉 2022-03-09 12:30 729阅读 0赞

在springboot项目中引入依赖：

<dependency>
                <groupId>org.activiti</groupId>
                <artifactId>activiti-spring-boot-starter-basic</artifactId>
                <version>6.0.0</version>
    </dependency>

*  启动报错1：  
    org.springframework.beans.factory.BeanCreationException:  
    Error creating bean with name ‘requestMappingHandlerMapping’ defined in class path resource \[org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class\]:  
    Invocation of init method failed; nested exception is java.lang.ArrayStoreException: sun.reflect.annotation.TypeNotPresentExceptionProxy

这里先放上网上找来的解决办法：  
**在启动类上排除org.activiti.spring.boot.SecurityAutoConfiguration类**

@SpringBootApplication(exclude = { 
            org.activiti.spring.boot.SecurityAutoConfiguration.class
    })
    public class SpringActivitiApplication { 
    
        public static void main(String[] args) { 
            SpringApplication.run(SpringActivitiApplication.class, args);
        }
    }

这里再说下我对这个错误的理解：  
找到activiti-spring-boot-starter-basic-6.0.0这个jar包，打开META-INFO路径下的`spring.factories`。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6eDIwMTg_size_16_color_FFFFFF_t_70]  
这个文件包含了activiti的自动配置类  
其中最后一个类就是`SecurityAutoConfiguration`，打开这个类  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6eDIwMTg_size_16_color_FFFFFF_t_70 1]  
可以看到这个类前面有个注解`@AutoConfigureBefore({org.springframework.boot.autoconfigure.security.SecurityAutoConfiguration.class})`  
这说明这个类是一个自动配置类，它会在springboot的security包下面的SecurityAutoConfiguration之前被自动装配。  
再到org.springframework.boot.autoconfigure.security路径下寻找SecurityAutoConfiguration类  
![在这里插入图片描述][20190313094849278.png]  
看到这里我大概就理解了，**2.X版本的springboot已经没有自动装配SecurityAutoConfiguration这个类了**。也因此activiti的SecurityAutoConfiguration也无法被自动装配了。于是就爆出了以上的错误。

*  启动报错2  
    Error creating bean with name ‘springProcessEngineConfiguration’ defined in class path resource \[org/activiti/spring/boot/DataSourceProcessEngineAutoConfiguration$DataSourceProcessEngineConfiguration.class\]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate \[org.activiti.spring.SpringProcessEngineConfiguration\]: Factory method ‘springProcessEngineConfiguration’ threw exception; nested exception is java.io.FileNotFoundException: class path resource \[processes/\] cannot be resolved to URL because it does not exist

解决方法：  
**方法1：在application.properties中加上**  
`spring.activiti.check-process-definitions=false`  
**方法2：在resources目录下面新建一个processes包**

这个错误就很好理解了，我找到org.activiti.spring.boot路径下的`ActivitiProperties`类  
![在这里插入图片描述][20190313100657560.jpg]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2N6eDIwMTg_size_16_color_FFFFFF_t_70 2]  
这个类是加载activiti相关的配置环境，默认的`checkProcessDefinitions`是true，也就是说默认会扫描classpath:/processes/包下面的所有的.bpmn20.xml和.bpmn后缀的文件。而项目里没有processes的时候他就会报错。  
如果不想把流程文件放processes目录下，只需用`spring.activiti.process-definition-location-prefix`来修改配置

**额外再说几个关于activiti的坑：**

*  activiti是自带有mybatis的，如果我们在项目中自己引入mybatis的话就会出现冲突。可以将自己引入的mybatis去掉，或者将activiti中的mybatis依赖去掉

<dependency>
                <groupId>org.activiti</groupId>
                <artifactId>activiti-spring-boot-starter-basic</artifactId>
                <version>6.0.0</version>
                <exclusions>
                    <exclusion>
                        <groupId>org.mybatis</groupId>
                        <artifactId>mybatis</artifactId>
                    </exclusion>
                </exclusions>
            </dependency>

*  如果用不到的话就将activiti的异步定时器关掉 `spring.activiti.async-executor-activate=false`

后期如果还有坑的话我再更新。暂时先end吧

\-------------------------------- 这是一条分隔线 ---------------------------------  
12月25号更新。  
今天看到一个更加简便的springboot和activiti6.0.0整合的办法  
我们将引入的依赖改为：

<dependency>
                <groupId>org.activiti</groupId>
                <artifactId>activiti-spring</artifactId>
                <version>6.0.0</version>
    </dependency>

然后写一个配置类：

@Configuration
    public class ActivitiConf { 
        static Logger logger = LoggerFactory.getLogger(ActivitiConf.class);
        /**
        * 这里的数据源改为自己项目中实际的数据源bean对象
        */
        @Autowired
        @Qualifier("sqlserverDS")
        private DataSource yyptDataSource;
        /**
        * 这里的事务管理器改为自己项目中实际的事务管理器bean对象
        */
        @Autowired
        @Qualifier("SqlserverTransactionManager")
        private DataSourceTransactionManager dataSourceTransactionManager;
    
        @Bean
        public SpringProcessEngineConfiguration springProcessEngineConfiguration(){ 
            SpringProcessEngineConfiguration spec = new SpringProcessEngineConfiguration();
            spec.setDataSource(yyptDataSource);
            spec.setTransactionManager(dataSourceTransactionManager);
            spec.setDatabaseSchemaUpdate("true");
            Resource[] resources = null;
            // 启动自动部署流程
            try { 
                resources = new PathMatchingResourcePatternResolver().getResources("classpath:processes/*.bpmn");
            } catch (IOException e) { 
                logger.error(e.toString());
            }
            spec.setDeploymentResources(resources);
            return spec;
        }
    
        @Bean
        public ProcessEngineFactoryBean processEngine(){ 
            ProcessEngineFactoryBean processEngineFactoryBean = new ProcessEngineFactoryBean();
            processEngineFactoryBean.setProcessEngineConfiguration(springProcessEngineConfiguration());
            return processEngineFactoryBean;
        }
    
    
        @Bean
        public RepositoryService repositoryService() throws Exception{ 
            return processEngine().getObject().getRepositoryService();
        }
        @Bean
        public RuntimeService runtimeService() throws Exception{ 
            return processEngine().getObject().getRuntimeService();
        }
        @Bean
        public TaskService taskService() throws Exception{ 
            return processEngine().getObject().getTaskService();
        }
        @Bean
        public HistoryService historyService() throws Exception{ 
            return processEngine().getObject().getHistoryService();
        }
    
        @Bean
        public FormService formService() throws Exception { 
            return processEngine().getObject().getFormService();
        }
    
        @Bean
        public ManagementService managementService() throws Exception { 
            return processEngine().getObject().getManagementService();
        }
    
        public IdentityService identityService() throws Exception { 
            return processEngine().getObject().getIdentityService();
        }
    
    }

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[20190313094849278.png]: /images/20220309/c13a375295134ffcafdfc1761c19e4b1.png
[20190313100657560.jpg]: /images/20220309/3e3184af844841aa971256e282ae2979.png
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