建立簡單的Activiti工作流Demo，

其專案結構：

首先需要在maven裡新增依賴：

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.Activiti</groupId>
  <artifactId>ActivitiDemo1</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>ActivitiDemo1 Maven Webapp</name>
  <url>http://maven.apache.org</url>


  <dependencies>
    <!--  引擎 -->
    <dependency>
      <groupId>org.activiti</groupId>
      <artifactId>activiti-engine</artifactId>
      <version>5.19.0.2</version>
    </dependency>
    <!--  與spring整合 -->
    <dependency>
      <groupId>org.activiti</groupId>
      <artifactId>activiti-spring</artifactId>
      <version>5.19.0.2</version>
    </dependency>

    <dependency>
      <groupId>org.activiti</groupId>
      <artifactId>activiti-bpmn-model</artifactId>
      <version>5.19.0.2</version>
    </dependency>
    <!--  mysql的連線 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.38</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>

    </dependency>
    <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
    </dependency>

    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>
  </dependencies>
  <build>
    <finalName>ActivitiDemo1</finalName>
  </build>
</project>
 

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans   http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">

        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/db_activiti" />
        <property name="jdbcDriver" value="com.mysql.jdbc.Driver" />
        <property name="jdbcUsername" value="root" />
        <property name="jdbcPassword" value="root" />

        <property name="databaseSchemaUpdate" value="true" />

    </bean>

</beans>
 

然後在main方法裡通過activiti.cfg.xml 進行配置，在資料庫裡生成25張表。程式碼如下

/**
     * 使用xml簡化配置 ，生成Activiti工作流所需要的25張表
     */
    @Test
    public void testCreateTableWithXml(){
        // 引擎配置
        ProcessEngineConfiguration pec=ProcessEngineConfiguration.createProcessEngineConfigurationFromResource("activiti.cfg.xml");
        // 獲取流程引擎物件
        ProcessEngine processEngine=pec.buildProcessEngine();
    }
 

package com.java1234.activiti.flow;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.junit.Test;

import java.util.List;

/**
 * 學生process
 * Created by T430 on 2017/8/9.
 */
public class StudentLeaveProcess {

    /**
     * 獲取預設流程引擎例項，會自動讀取activiti。config。xml檔案
     */
    private ProcessEngine processEngine= ProcessEngines.getDefaultProcessEngine();//獲取流程引擎

    /**
     * 第一步部署流程定義
     */
    @Test
    public  void deploy(){
        Deployment deployment= processEngine.getRepositoryService()//獲取部署相關的service
                .createDeployment()//建立部署

                .addClasspathResource("diagrams/StudentLeaveProcess.bpmn")//載入資原始檔
                .addClasspathResource("diagrams/StudentLeaveProcess.png")//載入資原始檔
                .name("學生請假流程")//流程名稱
                .deploy();//部署

        System.out.println("流程部署Id"+deployment.getId());
        System.out.println("流程部署名字"+deployment.getName());
    }

    /**
     * 第二步啟動流程例項
     */
    @Test
    public  void start(){
        ProcessInstance pi= processEngine.getRuntimeService()//執行時的service

                .startProcessInstanceByKey("studentLeaveProcess");//流程定義表的KEY欄位值
        System.out.println("流程例項id"+pi.getId());
    }

    /**
     * 第三步檢視任務
     *
     */
    @Test
    public void findTast(){
        List<Task> taskList= processEngine.getTaskService()//任務相關service
                .createTaskQuery()//建立任務查詢
                .taskAssignee("張三")//指定莫個人
                .list();

        for (Task t:taskList
                ) {
            System.out.println("任務Id"+t.getId());
            System.out.println("任務名稱"+t.getName());
            System.out.println("任務建立時間"+t.getCreateTime());
            System.out.println("任務委派人"+t.getAssignee());
            System.out.println("任務例項Id"+t.getProcessInstanceId());

        }
    }


    /**
     *第四步 完成任務
     */
    @Test
    public  void completeTask(){
        processEngine.getTaskService()//任務相關
                .complete("2504");//任務ID
    }

}

通過這些步驟，就可以完成簡單的學生請假流程了。

例子比較簡單。  不足之處請大神們見諒。