Spring boot整合activiti

• spring boot 整合 activiti

1. 创建一个spring boot项目。
2. pom文件中加入以下依赖：

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

3. 创建config，项目运行将创建activiti所需要的表

package com.example.activite.config;

import org.activiti.engine.*;
import org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration;
import org.activiti.spring.ProcessEngineFactoryBean;
import org.activiti.spring.SpringProcessEngineConfiguration;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.transaction.PlatformTransactionManager;

import javax.sql.DataSource;
import java.io.IOException;

@Configuration
public class ActivitiConfig {
    @Autowired
    private DataSource dataSource;
    @Autowired
    private PlatformTransactionManager platformTransactionManager;

    @Bean
    public SpringProcessEngineConfiguration springProcessEngineConfiguration(){
        SpringProcessEngineConfiguration spec = new SpringProcessEngineConfiguration();
        spec.setDataSource(dataSource);
        spec.setTransactionManager(platformTransactionManager);
        spec.setDatabaseSchemaUpdate("true");
        Resource[] resources = null;
        // 启动自动部署流程
        try {
            resources = new PathMatchingResourcePatternResolver().getResources("classpath*:processes/*.xml");
        } catch (IOException e) {
            e.printStackTrace();
        }
        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();
    }
}

4. 主启动类注解：

@SpringBootApplication(exclude = SecurityAutoConfiguration.class)

5. resource下创建一个文件夹用来存放流程文件

   
   目录结构

6. 启动项目，查看数据库是否创建表，这样就整合好了。

   
   数据库表

• 整合过程中遇到的问题

• 我的项目用的是mybatis-plus,而activiti使用的是mybatis,或者是自己的mybatis与activiti的mybatis版本冲突。
  解决办法：

# 排除activiti的mybatis，使用自己项目的mybatis
        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-engine</artifactId>
            <version>6.0.0</version>
            <exclusions>
                <exclusion>
                    <groupId>org.mybatis</groupId>
                    <artifactId>mybatis</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

• 部署流程的时候出现空指针.
  下面是我的测试用例

//部署流程
    @org.junit.jupiter.api.Test
    public void deployment() {
      //1.创建ProcessEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //2.得到RepositoryService实例
        RepositoryService repositoryService = processEngine.getRepositoryService();
        //3.进行部署
        Deployment deployment = repositoryService.createDeployment()
                .addClasspathResource("processes/firstProcess.xml")       // bpmn文件
                .addClasspathResource("processes/firstProcess.png")      // 图片文件
                .name("请假申请单流程")
                .deploy();

        System.out.println("流程部署id:" + deployment.getId());
        System.out.println("流程部署名称:" + deployment.getName());
    }

解决方法：在保证项目正常启动的情况下如果还出现空指针，那就可能是缺少了上面的第三点(不要用main方法测试)

• 启动报错Error creating bean with name 'processEngine'
  主要原因是：在act_ge_property表中的数据被清除了、使用demo类再次 部署流程定义后。或者把表全删了，重新创建。

activiti 的部署 启动（单元测试）

1. 部署

package org.activiti.engine;

import com.example.activite.SpringbootActivitiApplication;
import org.activiti.engine.repository.Deployment;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@SpringBootTest(classes = SpringbootActivitiApplication.class)
@RunWith(SpringRunner.class)
public class Test {

    @org.junit.jupiter.api.Test
    public void buShu(){
        //1.创建ProcessEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //2.得到RepositoryService实例
        RepositoryService repositoryService = processEngine.getRepositoryService();
        //3.进行部署
        Deployment deployment = repositoryService.createDeployment()
                .addClasspathResource("processes/firstProcess.xml")       // bpmn文件
                .addClasspathResource("processes/firstProcess.png")      // 图片文件
                .name("请假申请单流程")
                .deploy();
        System.out.println("流程部署id:" + deployment.getId());
        System.out.println("流程部署名称:" + deployment.getName());
    }

}

部署成功

image.png