环境及主要框架版本

JDK 1.8.0_112
maven 3.3.9
springframework 4.3.10.RELEASE
druid 1.1.2
junit 4.12

1.注意要加入spring-test及junit

<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-test</artifactId>
  <version>4.3.10.RELEASE</version>
  <scope>test</scope>
</dependency>
<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>${junit.version}</version>
  <scope>test</scope>
</dependency>

2.加入测试资源文件夹 设置为Test Sources Root
加入流程文件及配置文件applicationConfig.xml，数据库连接池根据需要自行配置

<?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/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
                 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">

    <!-- 配置数据源 -->
    <!-- 数据源配置, 使用 BoneCP 数据库连接池 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
          init-method="init" destroy-method="close">
        <!-- 数据源驱动类可不写，Druid默认会自动根据URL识别DriverClass -->
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>

        <!-- 基本属性 url、user、password -->
        <property name="url" value="jdbc:mysql://localhost:3306/hdqb?useUnicode=true&characterEncoding=utf-8"/>
        <property name="username" value="root"/>
        <property name="password" value="pwd"/>

        <!-- 配置初始化大小、最小、最大 -->
        <property name="initialSize" value="1"/>
        <property name="minIdle" value="1"/>
        <property name="maxActive" value="1"/>

        <!-- 配置获取连接等待超时的时间 -->
        <property name="maxWait" value="60000"/>

        <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis" value="60000"/>

        <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
        <property name="minEvictableIdleTimeMillis" value="300000"/>

        <property name="validationQuery" value="SELECT 'x'"/>
        <property name="testWhileIdle" value="true"/>
        <property name="testOnBorrow" value="false"/>
        <property name="testOnReturn" value="false"/>
    </bean>

    <!-- 配置事务管理器 -->
    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- activiti配置 -->
    <bean id="processEngine" class="org.activiti.spring.ProcessEngineFactoryBean">
        <property name="processEngineConfiguration" ref="processEngineConfiguration"/>
    </bean>
    <bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
        <property name="dataSource" ref="dataSource"/>
        <property name="transactionManager" ref="transactionManager"/>
        <property name="databaseSchemaUpdate" value="true"/>
    </bean>

    <!-- activiti主要的Service -->
    <bean id="repositoryService" factory-bean="processEngine"
          factory-method="getRepositoryService"/>
    <bean id="runtimeService" factory-bean="processEngine"
          factory-method="getRuntimeService"/>
    <bean id="taskService" factory-bean="processEngine"
          factory-method="getTaskService"/>
    <bean id="historyService" factory-bean="processEngine"
          factory-method="getHistoryService"/>
    <bean id="managementService" factory-bean="processEngine"
          factory-method="getManagementService"/>

    <!-- 配置activiti的规则 -->
    <bean id="activitiRule" class="org.activiti.engine.test.ActivitiRule">
        <property name="processEngine" ref="processEngine"/>
    </bean>

</beans>

3.加入测试类ActivitiSpringTest

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.TaskService;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.List;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationConfig.xml")
public class ActivitiSpringTest {

    @Autowired
    private ProcessEngine processEngine;
    @Autowired
    private RepositoryService repositoryService;
    @Autowired
    private RuntimeService runtimeService;
    @Autowired
    private TaskService taskService;
    @Autowired
    private RuntimeService historyService;
    @Autowired
    private TaskService managementService;

    @Test
    public void deploy() {
        Deployment deployment = repositoryService.createDeployment().name("MyProcess")
                .addClasspathResource("diagrams/MyProcess.bpmn").addClasspathResource("diagrams/MyProcess.png")
                .deploy();

        ProcessInstance pi = runtimeService.startProcessInstanceByKey("myProcess");
        System.out.println("流程实例" + pi.getId());

        List<Task> list = taskService.createTaskQuery().taskAssignee("张三").list();
        System.out.println("任务个数" + list.size());
        if (list != null && list.size() > 0) {
            for (Task t : list) {
                System.out.print(t.getId() + ",");
                System.out.print(t.getName() + ",");
                System.out.print(t.getAssignee() + ",");
                System.out.println(t.getProcessInstanceId());
            }
        }
    }

}

最终目录及文件如下