创建springboot项目

创建一个springboot项目引入相关的依赖,引入activiti 需要的相关依赖。

<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.activiti.org</groupId>
    <artifactId>activiti</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.1.RELEASE</version>
        <relativePath/>
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <activiti.version>5.22.0</activiti.version>
        <h2.version>1.4.180</h2.version>
        <junit.version>4.10</junit.version>
        <mockito.version>1.10.19</mockito.version>
        <powermock.version>1.6.6</powermock.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-test</artifactId>
        </dependency>

        <!-- TEST begin -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
        </dependency>

        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-core</artifactId>
            <version>${mockito.version}</version>
        </dependency>

        <dependency>
            <groupId>org.powermock</groupId>
            <artifactId>powermock-module-junit4</artifactId>
            <version>${powermock.version}</version>
        </dependency>
        <dependency>
            <groupId>org.powermock</groupId>
            <artifactId>powermock-api-mockito</artifactId>
            <version>${powermock.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>org.mockito</groupId>
                    <artifactId>mockito-all</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

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

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>${h2.version}</version>
        </dependency>

        <dependency>
            <groupId>org.dbunit</groupId>
            <artifactId>dbunit</artifactId>
            <version>2.4.8</version>
        </dependency>


        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-engine</artifactId>
            <version>${activiti.version}</version>
        </dependency>

        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-spring</artifactId>
            <version>${activiti.version}</version>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

idea 上安装activiti 插件

可以参考这篇文章：安装activiti 插件

使用的效果如图：

image.png

生成的文件是以bpmn结尾，同时我们可以把bpmn文件转化成xml 文件，生成的xml文件如下：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL" 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"
             expressionLanguage="http://www.w3.org/1999/XPath"
             id="m1533434256601" name="" targetNamespace="http://www.activiti.org/test"
             typeLanguage="http://www.w3.org/2001/XMLSchema">
    <process id="myProcess_1" isClosed="false" isExecutable="true" processType="None">
        <startEvent activiti:formKey="leave" activiti:initiator="xixi" id="start" name="StartEvent"/>
        <userTask activiti:assignee="yuxi" activiti:exclusive="true" id="_3" name="审核"/>
        <endEvent id="end" name="EndEvent"/>
        <sequenceFlow id="_5" sourceRef="start" targetRef="_3"/>
        <sequenceFlow id="_6" sourceRef="_3" targetRef="end"/>
    </process>
    <bpmndi:BPMNDiagram
            documentation="background=#3C3F41;count=1;horizontalcount=1;orientation=0;width=842.4;height=1195.2;imageableWidth=832.4;imageableHeight=1185.2;imageableX=5.0;imageableY=5.0"
            id="Diagram-_1" name="New Diagram">
        <bpmndi:BPMNPlane bpmnElement="myProcess_1">
            <bpmndi:BPMNShape bpmnElement="start" id="Shape-start">
                <omgdc:Bounds height="32.0" width="32.0" x="175.0" y="50.0"/>
                <bpmndi:BPMNLabel>
                    <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
                </bpmndi:BPMNLabel>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="_3" id="Shape-_3">
                <omgdc:Bounds height="55.0" width="85.0" x="145.0" y="160.0"/>
                <bpmndi:BPMNLabel>
                    <omgdc:Bounds height="55.0" width="85.0" x="0.0" y="0.0"/>
                </bpmndi:BPMNLabel>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNShape bpmnElement="_4" id="Shape-_4">
                <omgdc:Bounds height="32.0" width="32.0" x="170.0" y="310.0"/>
                <bpmndi:BPMNLabel>
                    <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
                </bpmndi:BPMNLabel>
            </bpmndi:BPMNShape>
            <bpmndi:BPMNEdge bpmnElement="_5" id="BPMNEdge__5" sourceElement="_2" targetElement="_3">
                <omgdi:waypoint x="191.0" y="82.0"/>
                <omgdi:waypoint x="191.0" y="160.0"/>
                <bpmndi:BPMNLabel>
                    <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
                </bpmndi:BPMNLabel>
            </bpmndi:BPMNEdge>
            <bpmndi:BPMNEdge bpmnElement="_6" id="BPMNEdge__6" sourceElement="_3" targetElement="_4">
                <omgdi:waypoint x="186.0" y="215.0"/>
                <omgdi:waypoint x="186.0" y="310.0"/>
                <bpmndi:BPMNLabel>
                    <omgdc:Bounds height="0.0" width="0.0" x="0.0" y="0.0"/>
                </bpmndi:BPMNLabel>
            </bpmndi:BPMNEdge>
        </bpmndi:BPMNPlane>
    </bpmndi:BPMNDiagram>
</definitions>

启动一个简单的流程

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, classes = Application.class)
public class VeryProcessTest {

    ProcessEngine processEngine;

    @Before
    public void testBefore() {
        // 创建流程引擎
        processEngine = ProcessEngineConfiguration.createStandaloneInMemProcessEngineConfiguration()
            .buildProcessEngine();
    }

    @Test
    public void test() {
        //部署流程定义文件
        RepositoryService repositoryService = processEngine.getRepositoryService();

        Deployment deploy = processEngine.getRepositoryService()
            .createDeployment()
            .addClasspathResource("leave.bpmn")
            .deploy();

        assertNotNull(deploy);

        RuntimeService runtimeService = processEngine.getRuntimeService();
        //创建流程定义
        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId(
            deploy.getId()).singleResult();

        //初始化流程
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey(processDefinition.getKey());

        assertNotNull(processInstance);

    }
}

• 需要注意的是这里使用的是内存数据库，可以参考pom依赖文件。
• 需要注意activiti 部署流程资源有很多种方式，可以选择你比较喜欢的。
  流程部署方式
  创建一个流程的步骤是：
  获取流程引擎(ProcessEngine)-->部署流程定义文件-->创建流程定义--->初始化具体流程