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Activiti7流程定义

一、什么是流程定义   流程定义是线下bpmn2.0标椎去描述业务流程,通常使用activiti-explorer(web控制台)或 activiti-eclipse-design…

一、什么是流程定义

  流程定义是线下bpmn2.0标椎去描述业务流程,通常使用activiti-explorer(web控制台)或 activiti-eclipse-designer 插件对业务流程进行建模,这两种方式都遵循 bpmn2.0 标准。使用designer  设计器绘制流程,会生成两个文件:.bpmn 和.png

  

1、.bpmn文件

  

2、.png文件生成

  ①首先将.bpmn文件改为.xml文件

    

  ②然后右键该xml文件Diagrams—>show BPMN 2.0 Designer就能生成一张流程图,将流程图导出保存到项目对应目录即可

    

    

  ③然后将.xml改回.bpmn即可

    

注意:

  流程图生成前须设置编码格式然后重启IDEA!!!

-Dfile.encoding=UTF-8

  

二、流程定义部署

1、什么是流程定义部署

  将线下定义的流程部署到activiti数据库中,这就是流程定义部署,通过调用activiti的api将流程定义的bpmn和png两个文件一个一个添加部署到activiti中,也可以将两个文件打成ZIP包进行部署;

2、activiti.cfg.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                        http://www.springframework.org/schema/contex
                        http://www.springframework.org/schema/context/spring-context.xsd
                        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!--数据源-->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/activiti"/>
        <property name="username" value="root"/>
        <property name="password" value="123"/>
    </bean>

    <!--配置Activiti使用的processEngine对象   默认命名为processEngineConfiguration-->
    <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>
        <!--配置数据源方式二:-->
        <!--<property name="jdbcDriver" value="com.mysql.jdbc.Driver"/>-->

        <!--指定数据库生成策略-->
        <property name="databaseSchemaUpdate" value="true"/>
    </bean>
</beans>

3、单个文件部署方式

  分别将bpmn文件和png图片文件部署;  

package com.zn;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Deployment;
import org.junit.Test;

public class ActivitiTest {

    /*流程部署
     * `act_ge_bytearray`    流程定义的资源信息,包含bpmn和png流程文件信息
     * `act_re_deployment`   流程部署信息 包含流程名称,ID,key等
     * `act_re_procdef`      流程定义信息
     * */
    @Test
    public void deployment(){
        //获取ProcessEngine对象   默认配置文件名称:activiti.cfg.xml  并且configuration的Bean实例ID为processEngineConfiguration
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //获取RepositoryService对象进行流程部署
        RepositoryService repositoryService = processEngine.getRepositoryService();
        //进行部署,将对应的流程定义文件生成到数据库当中,作为记录进行保存
        Deployment deployment = repositoryService.createDeployment()
                //加载流程文件
                .addClasspathResource("bpmnFiles/holiday.bpmn")
                .addClasspathResource("bpmnFiles/holiday.png")
                //设置流程名称
                .name("请假流程")
                .key("holidayKey")
                //部署
                .deploy();
        //输出部署信息
        System.out.println("流程名称:"+deployment.getName());
        System.out.println("流程ID:"+deployment.getId());
        System.out.println("流程Key:"+deployment.getKey());
    }
}

4、压缩包部署方式

  将bpmn文件和png图片压缩成zip包;

  

package com.zn;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Deployment;
import org.junit.Test;

import java.io.InputStream;
import java.util.zip.ZipInputStream;

public class ActivitiTest {

    /**
     * 压缩包的方式部署流程
     */
    @Test
    public void deploymentByZip(){
        //获取processEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //获取一个RepositoryService对象
        RepositoryService repositoryService = processEngine.getRepositoryService();
        //定义一个输入流,加载Zip文件
        InputStream inputStream=this.getClass().getClassLoader().getResourceAsStream("bpmnFiles/holiday.zip");
        //定义一个ZIPInputStream对象
        ZipInputStream zipInputStream=new ZipInputStream(inputStream);
        //流程部署
        Deployment deploy = repositoryService.createDeployment()
                .addZipInputStream(zipInputStream)
                .name("请求审批流程")
                .key("holidayKey")
                .deploy();
        System.out.println("流程名称:"+deploy.getName());

    }
}

  执行操作控制台效果

  

  数据库展示

  

5、流程定义查询

  查询部署的流程定义;

package com.zn;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.repository.ProcessDefinitionQuery;
import org.junit.Test;

import java.io.InputStream;
import java.util.List;
import java.util.zip.ZipInputStream;

public class ActivitiTest {

    /**
     * 流程定义信息查看
     */
    @Test
    public void getDefaultProcessEngine(){
        //获取processEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //获取一个RepositoryService对象
        RepositoryService repositoryService = processEngine.getRepositoryService();
        //得到流程定义查看对象ProcessDefinitionQuery
        ProcessDefinitionQuery processDefinitionQuery = repositoryService.createProcessDefinitionQuery();
        //指定查看的流程processDefinitionKey()指定流程定义的key值   orderByProcessDefinitionVersion根据流程定义版本号排序
        List<ProcessDefinition> holiday = processDefinitionQuery.processDefinitionKey("holiday").orderByProcessDefinitionVersion().desc().list();
        for (ProcessDefinition processDefinition:holiday) {
            System.out.println("流程定义ID:"+processDefinition.getId());
            System.out.println("流程定义的名称:"+processDefinition.getName());
            System.out.println("流程定义的Key:"+processDefinition.getKey());
            System.out.println("流程定义的版本号:"+processDefinition.getVersion());
        }
    }
}

  执行操作控制台效果

  

6、流程定义删除

  删除已经部署成功的流程定义;

package com.zn;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.repository.ProcessDefinitionQuery;
import org.junit.Test;

import java.io.InputStream;
import java.util.List;
import java.util.zip.ZipInputStream;

public class ActivitiTest {

    /**
     * 删除流程:
     * 假设在删除时,当前正在有该流程实例执行,那么会导致删除失败
     * 如果强制要求,则可以使用repositoryService.deleteDeployment("1",true); true代表级联删除
     */
    @Test
    public void deleteDeployment(){
        //获取processEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //获取一个RepositoryService对象
        RepositoryService repositoryService = processEngine.getRepositoryService();
        //删除流程
        repositoryService.deleteDeployment("10001",true);
    }
}

  说明:

    1.使用RepositoryService删除流程定义;

    2.如果流程定义下没有正在运行的流程,则可以普通删除;

    3.如果将流程定义下存在已经运行的流程,使用普通删除报错,可用级联删除方法将流程及相关级联全部删除;

三、从数据库中读取资源文件到本地

1、导入依赖

    <!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>

2、代码实现

package com.zn;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.repository.ProcessDefinitionQuery;
import org.apache.commons.io.IOUtils;
import org.junit.Test;

import java.io.*;
import java.util.List;
import java.util.zip.ZipInputStream;

public class ActivitiTest {

    /**
     * 从数据中读取资源文件到本地
     */
    @Test
    public void getResource() throws IOException {
        //获取processEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //获取一个RepositoryService对象
        RepositoryService repositoryService = processEngine.getRepositoryService();
        //获取到流程查询对象
        ProcessDefinitionQuery processDefinitionQuery = repositoryService.createProcessDefinitionQuery();
        //获取到流程资源
        processDefinitionQuery.processDefinitionKey("holiday");
        //获取单一结果
        ProcessDefinition processDefinition = processDefinitionQuery.singleResult();
        //流程部署的ID
        String deploymentId = processDefinition.getDeploymentId();
        //获取到bpmnResource
        InputStream bpmnStream = repositoryService.getResourceAsStream(deploymentId, processDefinition.getResourceName());
        //获取到png
        InputStream pngStream = repositoryService.getResourceAsStream(deploymentId, processDefinition.getDiagramResourceName());
        //构建输出流
        OutputStream bpmnOut = new FileOutputStream("E:\\accp\\Y2\\毕设项目\\"+processDefinition.getResourceName());
        OutputStream pngOut = new FileOutputStream("E:\\accp\\Y2\\毕设项目\\"+processDefinition.getDiagramResourceName());
        //将数据输出到磁盘当中
        IOUtils.copy(bpmnStream,bpmnOut);
        IOUtils.copy(pngStream,pngOut);
        //关流
        pngOut.close();
        bpmnOut.close();
        pngStream.close();
        bpmnStream.close();
    }
}

3、效果

  

四、业务系统和流程系统进行关联

  通过buessinessKey字段标识业务系统的主键数据ID,进而表名当前业务执行到了哪一个流程

1.代码实现

package com.zn;

import org.activiti.engine.*;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.repository.ProcessDefinitionQuery;
import org.activiti.engine.task.Task;
import org.apache.commons.io.IOUtils;
import org.junit.Test;

import java.io.*;
import java.util.List;
import java.util.zip.ZipInputStream;

public class ActivitiTest {

    /**
     * 启动流程实例和业务系统关联
     * 正常应该先添加数据到业务表当中,拿到当前添加数据的主键ID,通过启动流程实例,将主键ID交给BuessniessKkey
     * 代表和流程系统进行关联
     */
    @Test
    public void startInstance() {
        /**
         * 让张三在页面提交,然后拿到ID
         */

        /**
         * 创建张三请假的实例流程
         */
        //获取processEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        RuntimeService runtimeService = processEngine.getRuntimeService();
        //生成流程
        runtimeService.startProcessInstanceByKey("holiday","1");

        /**
         * 张三提交请假审批
         */
        //获取一个TaskService对象
        TaskService taskService = processEngine.getTaskService();
        //获取张三的任务
        Task task = taskService.createTaskQuery().taskAssignee("zhangsan").processDefinitionKey("holiday").singleResult();
        //任务审批
        taskService.complete(task.getId());
    }
}

2.数据库

  

五、流程激活和挂起

1、所有流程

package com.zn;

import org.activiti.engine.*;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.repository.ProcessDefinitionQuery;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.apache.commons.io.IOUtils;
import org.junit.Test;

import java.io.*;
import java.util.List;
import java.util.zip.ZipInputStream;

public class ActivitiTest {

    /**
     * 所有流程定义的挂起
     */
    @Test
    public void allSuspend(){
        //获取processEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //获取repositoryService对象
        RepositoryService repositoryService = processEngine.getRepositoryService();
        //获取流程定义
        ProcessDefinition holiday = repositoryService.createProcessDefinitionQuery().processDefinitionKey("holiday").singleResult();
        //获取到当前流程定义是否为暂停状态   suspended方法为true代表为暂停   false就是运行的
        boolean suspended = holiday.isSuspended();
        if(suspended){
            repositoryService.activateProcessDefinitionById(holiday.getId(),true,null);
            System.out.println("该流程定义激活");
        }else{
            repositoryService.suspendProcessDefinitionById(holiday.getId(),true,null);
            System.out.println("该流程定义暂停");
        }
    }
}

控制台效果:

  

再次执行效果:

  

2、单个流程

package com.zn;

import org.activiti.engine.*;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.repository.ProcessDefinitionQuery;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.apache.commons.io.IOUtils;
import org.junit.Test;

import java.io.*;
import java.util.List;
import java.util.zip.ZipInputStream;

public class ActivitiTest {

    /**
     * 单个流程实例的挂起
     */
    @Test
    public void singleSuspend(){
        //获取processEngine对象
        ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
        //获取RuntimeService对象
        RuntimeService runtimeService = processEngine.getRuntimeService();
        ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId("2501").singleResult();
        //获取到当前流程定义是否为暂停状态   suspended方法为true代表为暂停   false就是运行的
        boolean suspended = processInstance.isSuspended();
        if(suspended){
            runtimeService.activateProcessInstanceById("2501");
            System.out.println("xx的请假流程激活");
        }else{
            runtimeService.suspendProcessInstanceById("2501");
            System.out.println("xx的请假流程挂起");
        }
    }
}

控制台效果:

  

再次执行效果:

  

 

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作者: vmayfuture

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