springboot activiti工作流简单示例

最近一直研究springboot，根据工作需求，工作流需要作为一个单独的微服务工程来提供给其他服务调用，现在简单的写下工作流（使用的activiti）微服务的搭建与简单使用

jdk：1.8

数据库：mysql  5.7

IDE：eclipse

springboot：1.5.8

activiti：6.0.0

1.新建空白的maven微服务架构

新建maven项目的流程不在阐述，这里添加上activiti、myslq连接的依赖，只贴主要代码

pox.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">





  <modelVersion>4.0.0</modelVersion>





  <groupId>com.xxx</groupId>





  <artifactId>xxx</artifactId>





  <version>0.0.1-SNAPSHOT</version>





   <properties>





        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>





        <java.version>1.8</java.version>





    </properties>





 





    <parent>





        <groupId>org.springframework.boot</groupId>





        <artifactId>spring-boot-starter-parent</artifactId>





        <version>1.5.8.RELEASE</version>





    </parent>





    <dependencies>





        <dependency>





            <groupId>org.springframework.boot</groupId>





            <artifactId>spring-boot-starter-web</artifactId>





        </dependency>





        <dependency>





            <groupId>org.activiti</groupId>





            <artifactId>activiti-spring-boot-starter-basic</artifactId>





            <version>6.0.0</version>





        </dependency>





        <dependency>





            <groupId>org.springframework.boot</groupId>





            <artifactId>spring-boot-starter-data-jpa</artifactId>





        </dependency>





        <dependency>





            <groupId>org.springframework.boot</groupId>





            <artifactId>spring-boot-starter-thymeleaf</artifactId>





        </dependency>





        <dependency>





            <groupId>org.springframework.boot</groupId>





            <artifactId>spring-boot-starter-web</artifactId>





        </dependency>





 





        <dependency>





            <groupId>mysql</groupId>





            <artifactId>mysql-connector-java</artifactId>





            <scope>runtime</scope>





        </dependency>





        <dependency>





            <groupId>org.springframework.boot</groupId>





            <artifactId>spring-boot-starter-tomcat</artifactId>





        </dependency>





        <dependency>





            <groupId>org.springframework.boot</groupId>





            <artifactId>spring-boot-starter-test</artifactId>





            <scope>test</scope>





        </dependency>





    </dependencies>





    <build>





        <plugins>





            <plugin>





                <groupId>org.springframework.boot</groupId>





                <artifactId>spring-boot-maven-plugin</artifactId>





            </plugin>





        </plugins>





    </build>





</project>

确认服务是可用

2.连接服务名、服务端口、数据库配置

在resources目录下的application.properties（项目定位原因没有使用yaml，可根据自己项目使用）

spring.datasource.driver-class-name=com.mysql.jdbc.Driver





spring.datasource.url=jdbc:mysql://127.0.0.1:3306/activity?characterEncoding=utf8&useSSL=true





spring.datasource.username=root





spring.datasource.password=root





spring.jpa.properties.hibernate.hbm2ddl.auto=update





spring.jpa.show-sql=true





server.port=8081





server.context-path=/activity





server.session.timeout=10





server.tomcat.uri-encoding=UTF-8

确认配置的数据库可用

3.main

import org.springframework.boot.SpringApplication;





import org.springframework.boot.autoconfigure.SpringBootApplication;





 





/**





 * Created by Guo on 2017/11/15.





 */





@SpringBootApplication





public class ActivityApp





{





    public static void main(String[] args)





    {





        SpringApplication.run(ActivityApp.class, args);





    }





}

4.service及实现

service:

import org.activiti.engine.task.TaskQuery;





import org.springframework.web.bind.annotation.RequestMapping;





import org.springframework.web.bind.annotation.RequestMethod;





import org.springframework.web.bind.annotation.RestController;





 





@RestController





@RequestMapping("/activityService")





public interface ActivityConsumerService {





	/**





	 * 流程demo





	 * @return





	 */





	@RequestMapping(value="/startActivityDemo",method=RequestMethod.GET)





    public boolean startActivityDemo();





	





}

impl

import java.util.HashMap;





import java.util.Map;





 





import org.activiti.engine.RuntimeService;





import org.activiti.engine.TaskService;





import org.activiti.engine.impl.persistence.entity.ExecutionEntity;





import org.activiti.engine.task.Task;





import org.activiti.engine.task.TaskQuery;





import org.apache.commons.lang3.StringUtils;





import org.springframework.beans.factory.annotation.Autowired;





import org.springframework.stereotype.Service;





 





import com.hongguaninfo.activity.service.ActivityConsumerService;





@Service("activityService")





public class ActivityConsumerServiceImpl implements ActivityConsumerService {





 





	@Autowired





    private RuntimeService runtimeService;





	@Autowired





    private TaskService taskService;





	





	@Override





	public boolean startActivityDemo() {





		System.out.println("method startActivityDemo begin....");





        Map<String,Object> map = new HashMap<String,Object>();





        map.put("apply","zhangsan");





        map.put("approve","lisi");





//流程启动





        ExecutionEntity pi1 = (ExecutionEntity) runtimeService.startProcessInstanceByKey("leave",map);





        String processId = pi1.getId();





        String taskId = pi1.getTasks().get(0).getId();





        taskService.complete(taskId, map);//完成第一步申请





        





        Task task = taskService.createTaskQuery().processInstanceId(processId).singleResult();





        String taskId2 = task.getId();





        map.put("pass", false);





        taskService.complete(taskId2, map);//驳回申请





        System.out.println("method startActivityDemo end....");





        return false;





	}





}

5.bpmn

在resources目录下新建文件夹：processes，并在processes创建一个新的bpmn文件，如图

文件内容：

<?xml version="1.0" encoding="UTF-8"?>





<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:activiti="http://activiti.org/bpmn" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:omgdc="http://www.omg.org/spec/DD/20100524/DC" xmlns:omgdi="http://www.omg.org/spec/DD/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/testm1510735932336" id="m1510735932336" name="">





  <process id="leave" isExecutable="true" isClosed="false" processType="None">





    <startEvent id="_2" name="StartEvent"></startEvent>





    <endEvent id="_3" name="EndEvent"></endEvent>





    <userTask id="approve" name="经理审批" activiti:assignee="${approve}"></userTask>





    <exclusiveGateway id="_5" name="ExclusiveGateway"></exclusiveGateway>





    <sequenceFlow id="_6" sourceRef="approve" targetRef="_5"></sequenceFlow>





    <sequenceFlow id="_7" name="通过" sourceRef="_5" targetRef="_3">





      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${pass}]]></conditionExpression>





    </sequenceFlow>





    <userTask id="application" name="提交申请" activiti:assignee="${apply}"></userTask>





    <sequenceFlow id="_9" sourceRef="_2" targetRef="application"></sequenceFlow>





    <sequenceFlow id="_10" sourceRef="application" targetRef="approve"></sequenceFlow>





    <userTask id="modify" name="修改申请" activiti:assignee="${apply}"></userTask>





    <sequenceFlow id="_12" name="不通过" sourceRef="_5" targetRef="modify">





      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${!pass}]]></conditionExpression>





    </sequenceFlow>





    <sequenceFlow id="_13" sourceRef="modify" targetRef="approve"></sequenceFlow>





  </process>





  <bpmndi:BPMNDiagram id="BPMNDiagram_leave">





    <bpmndi:BPMNPlane bpmnElement="leave" id="BPMNPlane_leave">





      <bpmndi:BPMNShape bpmnElement="_2" id="BPMNShape__2">





        <omgdc:Bounds height="35.0" width="35.0" x="15.0" y="60.0"></omgdc:Bounds>





      </bpmndi:BPMNShape>





      <bpmndi:BPMNShape bpmnElement="_3" id="BPMNShape__3">





        <omgdc:Bounds height="35.0" width="35.0" x="630.0" y="63.0"></omgdc:Bounds>





      </bpmndi:BPMNShape>





      <bpmndi:BPMNShape bpmnElement="approve" id="BPMNShape_approve">





        <omgdc:Bounds height="55.0" width="85.0" x="315.0" y="50.0"></omgdc:Bounds>





      </bpmndi:BPMNShape>





      <bpmndi:BPMNShape bpmnElement="_5" id="BPMNShape__5">





        <omgdc:Bounds height="40.0" width="40.0" x="505.0" y="60.0"></omgdc:Bounds>





      </bpmndi:BPMNShape>





      <bpmndi:BPMNShape bpmnElement="application" id="BPMNShape_application">





        <omgdc:Bounds height="55.0" width="85.0" x="135.0" y="50.0"></omgdc:Bounds>





      </bpmndi:BPMNShape>





      <bpmndi:BPMNShape bpmnElement="modify" id="BPMNShape_modify">





        <omgdc:Bounds height="55.0" width="85.0" x="315.0" y="150.0"></omgdc:Bounds>





      </bpmndi:BPMNShape>





      <bpmndi:BPMNEdge bpmnElement="_6" id="BPMNEdge__6">





        <omgdi:waypoint x="400.0" y="77.0"></omgdi:waypoint>





        <omgdi:waypoint x="505.0" y="80.0"></omgdi:waypoint>





      </bpmndi:BPMNEdge>





      <bpmndi:BPMNEdge bpmnElement="_7" id="BPMNEdge__7">





        <omgdi:waypoint x="545.0" y="80.0"></omgdi:waypoint>





        <omgdi:waypoint x="630.0" y="80.0"></omgdi:waypoint>





      </bpmndi:BPMNEdge>





      <bpmndi:BPMNEdge bpmnElement="_9" id="BPMNEdge__9">





        <omgdi:waypoint x="50.0" y="77.0"></omgdi:waypoint>





        <omgdi:waypoint x="135.0" y="77.0"></omgdi:waypoint>





      </bpmndi:BPMNEdge>





      <bpmndi:BPMNEdge bpmnElement="_10" id="BPMNEdge__10">





        <omgdi:waypoint x="220.0" y="77.0"></omgdi:waypoint>





        <omgdi:waypoint x="315.0" y="77.0"></omgdi:waypoint>





      </bpmndi:BPMNEdge>





      <bpmndi:BPMNEdge bpmnElement="_12" id="BPMNEdge__12">





        <omgdi:waypoint x="525.0" y="100.0"></omgdi:waypoint>





        <omgdi:waypoint x="525.0" y="177.0"></omgdi:waypoint>





        <omgdi:waypoint x="400.0" y="177.0"></omgdi:waypoint>





      </bpmndi:BPMNEdge>





      <bpmndi:BPMNEdge bpmnElement="_13" id="BPMNEdge__13">





        <omgdi:waypoint x="357.0" y="150.0"></omgdi:waypoint>





        <omgdi:waypoint x="357.0" y="105.0"></omgdi:waypoint>





      </bpmndi:BPMNEdge>





    </bpmndi:BPMNPlane>





  </bpmndi:BPMNDiagram>





</definitions>

需要认知的问题：.项目启动的时候，activiti会自动在mysql中创建activiti相关表，不用像oracle那样需要手动去创建

6.验证

启动项目前，连接数据库，查看需要连接数据库中没有表，启动项目完成后，刷新数据库，activiti已经创建相关表，打开act_re_procdef表，流程数据已经存在，即流程已经部署成功。

用浏览器访问地址：http://127.0.0.1:8081/activity/activityService/startActivityDemo

打印了预计的日志，没有报错信息，查看数据库中的act_ru_task表，发现刚才执行形成的数据，项目成功。

PS:只是简单的微服务，没有去写注册服务、网关配置、熔断机制等等，仅用于activiti与springboot的结合

=========================后续==========================

1.在项目单独作为一个引擎，本身不部署流程的时候，如果resources目录没有“processes”目录，启动项目报错--找不到processes目录。需要在配置文件中添加一下内容：

spring: 





  activiti: 





####校验流程文件，默认校验resources下的processes文件夹里的流程文件





    check-process-definitions: false

即启动项目，不去校验processes。

原文地址：https://blog.csdn.net/kkkder/article/details/78562349