Activiti----hellowWorld(使用H2数据库)

1、项目结构

2、pom

<dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>4.2.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-engine</artifactId>
            <version>5.18.0</version>

        </dependency>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.4.188</version>
        </dependency>
    </dependencies>

3、activiti.cfg.xml

<?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">
    <!-- 流程引擎配置 -->
    <bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneInMemProcessEngineConfiguration">
        <property name="jdbcUrl" value="jdbc:h2:mem:Activiti" />
        <property name="jdbcDriver" value="org.h2.Driver" />
        <property name="jdbcUsername" value="sa"></property>
        <property name="jdbcPassword" value=""></property>
        <!-- databaseSchemaUpdate 配置流程引擎启动/关闭时对数据库Schema的策略.取值有:
            false:默认子,检查DBSchema版本与Activiti开发包是否一致
            true:更新数据库中标信息,如果不存在则创建,推荐使用
            create-drop 启动时创建表 关闭时删除表
         -->
        <property name="databaseSchemaUpdate" value="true"></property>
    </bean>

</beans>

4、Helloworld.bpmn20.xml

<?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">
  <process id="myProcess" name="第一个流程图" isExecutable="true">
    <startEvent id="startevent1" name="开始事件"></startEvent>
    <endEvent id="endevent1" name="结束事件"></endEvent>
    <userTask id="usertask1" name="HelloWorld"></userTask>
    <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow>
    <sequenceFlow id="flow2" sourceRef="usertask1" targetRef="endevent1"></sequenceFlow>
  </process>
  <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="90.0" y="180.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
        <omgdc:Bounds height="35.0" width="35.0" x="350.0" y="320.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1">
        <omgdc:Bounds height="55.0" width="105.0" x="360.0" y="180.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
        <omgdi:waypoint x="125.0" y="197.0"></omgdi:waypoint>
        <omgdi:waypoint x="360.0" y="207.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">
        <omgdi:waypoint x="412.0" y="235.0"></omgdi:waypoint>
        <omgdi:waypoint x="367.0" y="320.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

5、HelloWorld.java

import org.activiti.engine.task.Task;
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;

public class HelloWorld {
    public static void main(String[] args) {
        //1 获取流程引擎配置
        ProcessEngineConfiguration cfg = ProcessEngineConfiguration.createProcessEngineConfigurationFromResource("/config/activiti.cfg.xml");
        // 2 创建流程引擎
        ProcessEngine engine = cfg.buildProcessEngine();
        //3.获取 RepositoryService
        RepositoryService repositoryService = engine.getRepositoryService();

        //4 部署流程图
        repositoryService.createDeployment().addClasspathResource("process/Two.bpmn20.xml").deploy();
        //5. 获取运行时候服务RuntimeService
        RuntimeService runtimeService = engine.getRuntimeService();

        //6.获取流程实例
        String processDefinitionKey = "mine";
        ProcessInstance instance = runtimeService.startProcessInstanceByKey(processDefinitionKey);
        System.out.println(instance.getActivityId());
        //7.获取TaskService
        TaskService taskServer = engine.getTaskService();
        long count = taskServer.createTaskQuery().count();
        System.out.println("count:" + count);
        //8. 查询Task
        Task task = taskServer.createTaskQuery().singleResult();

        //9 处理任务
        System.out.println(task.getName());

    }
}

6、另H2  Test

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import org.junit.Test;
public class H2DbTest {
    @Test
    public void testH2() {
        // 1 加载驱动
        try {
            Class.forName("org.h2.Driver");
            //2 获得数据库连接
            try {
                Connection conn= DriverManager.getConnection("jdbc:h2:mem:Activiti","sa","");
                // 3 创建Persion表
                Statement stt = conn.createStatement();
                String sql ="create table person(id int auto_increment primary key, name varchar(200));"
                        + " insert into person(name) values('vic')";
                stt.execute(sql);
                PreparedStatement ps = conn.prepareStatement("select * from person");
                ResultSet rs = ps.executeQuery();
                while(rs.next()) {
                    System.out.println("id:" + rs.getInt(1));
                    System.out.println("name:" + rs.getString(2));
                }
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
}