maven 实现activity工作流的简单例子（以报销为例 附代码）

<?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.StandaloneInMemProcessEngineConfiguration">
        <property name="databaseSchemaUpdate" value="true"/>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/activiti"/>
        <property name="jdbcDriver" value="com.mysql.jdbc.Driver" />
        <property name="jdbcUsername" value="root" />
        <property name="jdbcPassword" value="qwer1234" />
    </bean>
</beans>

package activityWordFlow;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngineConfiguration;

public class CreateTable {
    public static void main(String[] args) {             
        ProcessEngine processEngine = ProcessEngineConfiguration.createProcessEngineConfigurationFromResource("activiti.cfg.xml").buildProcessEngine();     
        System.out.println("processEngine="+processEngine);
         
    }
}

package activityWordFlow;

import java.util.List;

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



public class run {
        /**
         * 部署流程
         * 执行完，就会像act_re_procdef、act_re_deployment和act_ge_bytearray三张表中，插入数据
         */
        private static ProcessEngine processEngine =ProcessEngines.getDefaultProcessEngine();
         
            public void delployFlow(){
                         Deployment deployment = processEngine.getRepositoryService()//与流程定义和部署对象相关的service
                        .createDeployment()//创建一个部署对象
                        .name("报销流程")    //添加部署对象名称
                        .addClasspathResource("baoxiao.bpmn")//从classpath的资源加载，一次只能加载一个文件
                        .addClasspathResource("baoxiao.png")//从classpath的资源加载，一次只能加载一个文件
                        .deploy();//完成部署
                
                // 存在在数据库 act_re_procdef的DEPLOYMENT_ID_
                //act_re_procdef(流程定义数据表)  act_re_deployment  (部署信息表)   act_ge_bytearray（资源文件表）
                System.out.println(deployment.getId());
                System.out.println(deployment.getName());
           }
            /**
             * 启动流程  runtimeService对象
             * 执行完，就会在 act.ru.task表中，插入数据（每次插入一条数据）
             */
            public void flowStart() {
                RuntimeService runtimeService = processEngine.getRuntimeService();// 获取runtimeService对象
                ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("员工报销单据");//act_re_procdef(流程定义数据表)中的key_字段
            }
            /**
             * 查找代办任务信息
             */
            public void findEmployeeTask(){
                //数据库关系》》》》ID【act_re_deployment】 == ID【act_ru_execution】  == ID【act_ru_task】 ==》【ASSIGNEE_(cwh)】
                String assignee = "employee";  //节点的assignee_   
                List<Task> taskList= processEngine.getTaskService()//获取任务启动流程的service
                        .createTaskQuery()//创建查询对象
                        .taskAssignee(assignee)//指定查询人
                        .list();
                
                if(taskList.size()>0){
                    for (Task task : taskList){
                        System.out.println("代办任务ID:"+task.getId());
                        System.out.println("代办任务name:"+task.getName());
                        System.out.println("代办任务创建时间:"+task.getCreateTime());
                        System.out.println("代办任务办理人:"+task.getAssignee());
                        System.out.println("流程实例ID:"+task.getProcessInstanceId());
                        System.out.println("执行对象ID:"+task.getExecutionId());
                    }
                }
            }

            /**
             * 处理流程
             * 
             * 根据act_ru_task 任务表的id，获取流程的service对象，调用complete方法来处理流程。
             * 
             * @Description:
             */
            public void completeTask(){
                // ID【act_ru_task】
                String taskId = "2505";        
                processEngine.getTaskService().complete(taskId);//完成任务     
                System.out.println("完成任务，任务ID:"+taskId);
         
          }

            public static void main(String[] args) {
                run r = new run();
                //r.delployFlow();
                //r.flowStart();
                r.findEmployeeTask();
                //r.completeTask();
            }

}