使用Eclipse對springboot+activiti開發之簡單流程（一）

詳細代碼demo，在這裏→https://download.csdn.net/download/qq_28582847/10344437

準備工作：

        1.搭建一個springboot+maven開發環境，參考網址：https://blog.csdn.net/qq_28582847/article/details/79891695

        2.在IDEA中安裝actiBPM插件 或者 在eclipse中安裝activiti插件（eclipse對activiti畫圖集成較好，本文使用這個）

1.畫工作流程圖

        安裝好插件後，使用eclipse新建空項目，右鍵→new→other，選擇activiti Diagram→命名爲demo2.bpmn→finish

本文不教怎麼手動畫流程圖，直接使用xml方式生成，我們使用xml方式打開

將下列代碼複製進去

<?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" xmlns:tns="http://www.activiti.org/test" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" expressionLanguage="http://www.w3.org/1999/XPath" id="m1523330736616" name="" targetNamespace="http://www.activiti.org/test" typeLanguage="http://www.w3.org/2001/XMLSchema">
  <process id="demo2" isClosed="false" isExecutable="true" name="My process" processType="None">
    <startEvent id="startevent1" name="Start"/>
    <userTask activiti:exclusive="true" id="usertask1" name="請假"/>
    <userTask activiti:exclusive="true" id="usertask2" name="審批"/>
    <endEvent id="endevent1" name="End"/>
    <sequenceFlow id="flow1" sourceRef="usertask2" targetRef="endevent1"/>
    <sequenceFlow id="flow2" sourceRef="usertask1" targetRef="usertask2"/>
    <sequenceFlow id="flow3" sourceRef="startevent1" targetRef="usertask1"/>
  </process>
  <bpmndi:BPMNDiagram documentation="background=#FFFFFF;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="demo2">
      <bpmndi:BPMNShape bpmnElement="startevent1" id="Shape-startevent1">
        <omgdc:Bounds height="32.0" width="32.0" x="130.0" y="180.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="usertask1" id="Shape-usertask1">
        <omgdc:Bounds height="55.0" width="105.0" x="271.0" y="170.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="55.0" width="105.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="usertask2" id="Shape-usertask2">
        <omgdc:Bounds height="55.0" width="105.0" x="471.0" y="170.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="55.0" width="105.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="endevent1" id="Shape-endevent1">
        <omgdc:Bounds height="32.0" width="32.0" x="690.0" y="180.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="32.0" width="32.0" x="0.0" y="0.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1" sourceElement="usertask2" targetElement="endevent1">
        <omgdi:waypoint x="576.0" y="197.5"/>
        <omgdi:waypoint x="690.0" y="196.0"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="-1.0" width="-1.0" x="-1.0" y="-1.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2" sourceElement="usertask1" targetElement="usertask2">
        <omgdi:waypoint x="376.0" y="197.5"/>
        <omgdi:waypoint x="471.0" y="197.5"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="-1.0" width="-1.0" x="-1.0" y="-1.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3" sourceElement="startevent1" targetElement="usertask1">
        <omgdi:waypoint x="162.0" y="196.0"/>
        <omgdi:waypoint x="271.0" y="197.5"/>
        <bpmndi:BPMNLabel>
          <omgdc:Bounds height="-1.0" width="-1.0" x="-1.0" y="-1.0"/>
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

注意：id="demo2"保持和文件名一致

重新右鍵demo2.bpmn→open with→Activiti Diagram Editor打開

2.搭建springboot+maven的項目，結構如下

1)修改pom.xml文件，代碼如下：

<?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</groupId>
    <artifactId>MyActiviti</artifactId>
    <version>1.0-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.2.6.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-spring-boot-starter-basic</artifactId>
            <version>5.22.0</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional><!-- optional=true,依賴不會傳遞，該項目依賴devtools；之後依賴myboot項目的項目如果想要使用devtools，需要重新引入 -->
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

2)在application.properties增加數據庫連接(程序啓動後，表都是系統自建)

spring.datasource.url=jdbc:mysql://127.0.0.1:3306/activitiy?characterEncoding=utf8&useSSL=true
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.max-idle=10
spring.datasource.max-wait=10000
spring.datasource.min-idle=5
spring.datasource.initial-size=5
server.context-path=/workFlow
server.session.timeout=10
spring.http.encoding.force=true
spring.http.encoding.charset=UTF-8
spring.http.encoding.enabled=true
server.tomcat.uri-encoding=UTF-8
server.port=8081
spring.activiti.check-process-definitions=false

3)將demo2.bpmn文件放入到resources/templates目錄下

4)編寫一個controller類

代碼如下：

@RestController
@RequestMapping("/demo")
public class DemoController {
    @Autowired
    private RepositoryService repositoryService;
    @Autowired
    private RuntimeService runtimeService;
    @Autowired
    private TaskService taskService;

    @RequestMapping("/firstDemo")
    public void firstDemo() {

        //根據bpmn文件部署流程
        Deployment deployment = repositoryService.createDeployment().addClasspathResource("templates/demo2.bpmn").deploy();
        //獲取流程定義
        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId(deployment.getId()).singleResult();
        //啓動流程定義，返回流程實例
        ProcessInstance pi = runtimeService.startProcessInstanceById(processDefinition.getId());
        String processId = pi.getId();
        System.out.println("流程創建成功，當前流程實例ID："+processId);

        Task task=taskService.createTaskQuery().processInstanceId(processId).singleResult();
        System.out.println("第一次執行前，任務名稱："+task.getName());
        taskService.complete(task.getId());

        task = taskService.createTaskQuery().processInstanceId(processId).singleResult();
        System.out.println("第二次執行前，任務名稱："+task.getName());
        taskService.complete(task.getId());

        task = taskService.createTaskQuery().processInstanceId(processId).singleResult();
        System.out.println("task爲null，任務執行完畢："+task);
    }
}

5)啓動application.java類，訪問http://localhost:8081/workFlow/demo/firstDemo,查看控制檯

講解：從代碼上我們可以知道runtimeService.startProcessInstanceById該方法啓動了流程，通過獲取 Task task=taskService.createTaskQuery().processInstanceId(processId).singleResult();節點的信息後，我們進行taskService.complete(task.getId());完成該節點，從而流程走到下一節點，直到流程走完。