建立一个普通的javaSE工程，工程的目录结构如下：

需要的jar包如下：

在config文件夹下创建log4j.properties用来输入日志，内容如下：

log4j.rootLogger=INFO, CA
# ConsoleAppender
log4j.appender.CA=org.apache.log4j.ConsoleAppender
log4j.appender.CA.layout=org.apache.log4j.PatternLayout
log4j.appender.CA.layout.ConversionPattern= %d{hh:mm:ss,SSS} [%t] %-5p %c %x - %m%n

在config文件夹下创建activiti.cfg.xml（每个框架都有自己的配置文件，在没有使用spring托管框架的时候，这个配置文件管理框架的全部配置）,内容如下

<?xml version="1.0"?>
<beans default-lazy-init="false"xsi:schemaLocation=" http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jee="http://www.springframework.org/schema/jee"xmlns:util="http://www.springframework.org/schema/util" xmlns:context="http://www.springframework.org/schema/context"xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://www.springframework.org/schema/beans"><beanclass="org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration"id="processEngineConfiguration">

<span style="white-space:pre">		</span><!--配置数据库信息，这里使用mysql 但是测试时推荐使用h2数据库 见activiti自带的demo中的配置文件<span style="font-family: Arial, Helvetica, sans-serif;">--></span>

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

<span style="white-space:pre">		</span><!--当表结构不存在时，生成activiti的23个表--><property name="databaseSchemaUpdate" value="true" />

<span style="white-space:pre">		</span><!--工作流转--><property name="jobExecutorActivate" value="true" /><!--邮件-->

<span style="white-space:pre">		</span><property name="mailServerHost" value="mail.my-corp.com" /><property name="mailServerPort" value="5025" /><!--历史-->

<span style="white-space:pre">		</span><property name="history" value="full"></property></bean>
</beans>

在progress文件夹下建立我们的流程定义，右键选择new-----other---------Activiti Diagram(之前需要安装eclipse的activiti插件，推荐在线安装---Name: Activiti BPMN 2.0 designer     Location: http://activiti.org/designer/update/)

建立如下的流程定义

在该流程右键选择xml打开方式，可以得到流程的xml配置信息

<?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" typeLanguage="http://www.w3.org/2001/XMLSchema" expressionLanguage="http://www.w3.org/1999/XPath" targetNamespace="http://www.activiti.org/test">
<!-- 流程内的信息-->  

<process id="myProcess" name="My process" isExecutable="true"><startEvent id="startevent1" name="Start"></startEvent><userTask id="usertask1" name="User Task"></userTask><sequenceFlow id="flow1" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow><endEvent id="endevent1" name="End"></endEvent><sequenceFlow id="flow2" sourceRef="usertask1" targetRef="endevent1"></sequenceFlow></process>

<!--这些都是用来标志图中的各种图形的大小和位置的 --><bpmndi:BPMNDiagram id="BPMNDiagram_myProcess"><bpmndi:BPMNPlane bpmnElement="myProcess" id="BPMNPlane_myProcess"><bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1"><omgdc:Bounds height="35.0" width="35.0" x="140.0" y="180.0"></omgdc:Bounds></bpmndi:BPMNShape><bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1"><omgdc:Bounds height="55.0" width="105.0" x="220.0" y="170.0"></omgdc:Bounds></bpmndi:BPMNShape><bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1"><omgdc:Bounds height="35.0" width="35.0" x="370.0" y="180.0"></omgdc:Bounds></bpmndi:BPMNShape><bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1"><omgdi:waypoint x="175.0" y="197.0"></omgdi:waypoint><omgdi:waypoint x="220.0" y="197.0"></omgdi:waypoint></bpmndi:BPMNEdge><bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2"><omgdi:waypoint x="325.0" y="197.0"></omgdi:waypoint><omgdi:waypoint x="370.0" y="197.0"></omgdi:waypoint></bpmndi:BPMNEdge></bpmndi:BPMNPlane></bpmndi:BPMNDiagram>
</definitions>

可以得到流程的id为 myProcess，当然这是默认的，你可以随意修改.

最后就可以编写测试类来测试这个流程了

package activiti_001;import junit.framework.Assert;import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngineConfiguration;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.TaskService;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.junit.Test;public class MyProcessTest {@Testpublic void test() {// 通过默认的资源获得流程引擎的配置信息(默认的--当然就是activiti.cfg.xml 了)ProcessEngineConfiguration configuration = ProcessEngineConfiguration.createProcessEngineConfigurationFromResourceDefault();// 通过配置信息获得流程引擎ProcessEngine processEngine = configuration.buildProcessEngine();// 流程引擎是activiti的核心，也就是activiti的门户，通过它可以获得各种服务。// 获得部署服务RepositoryService repositoryService = processEngine.getRepositoryService();// 获得运行时服务RuntimeService runtimeService = processEngine.getRuntimeService();// 获得任务服务TaskService taskService = processEngine.getTaskService();// 部署我们定义的流程repositoryService.createDeployment().addClasspathResource("MyProcess.bpmn").deploy();// 启动定义的流程 一定要使用BYKEYProcessInstance instance = runtimeService.startProcessInstanceByKey("myProcess");// 通过任务服务来查询任务Task task = taskService.createTaskQuery().singleResult();// 断言任务的名称System.out.println(task.getName());Assert.assertTrue("User Task".equals(task.getName()));// 完成任务（因为这是一个用户任务，所以需要模拟完成一下）taskService.complete(task.getId());task = taskService.createTaskQuery().singleResult();// 流程结束}}