使用Eclipse對springboot+activiti開發之分支流程（二）

如對activiti沒大概瞭解和開發的話，請移步到使用IDEA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

1.畫工作流程圖（這裏直接上流程圖代碼）

<?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="demo5" name="My process" isExecutable="true">
    <startEvent id="startevent1" name="Start"></startEvent>
    <serviceTask id="servicetask1" name="業戶提交" activiti:expression="#{activityDemoServiceImpl.updateBizStatus(execution,"tj")}"></serviceTask>
    <sequenceFlow id="flow1" sourceRef="startevent1" targetRef="servicetask1"></sequenceFlow>
    <userTask id="usertask1" name="受理" activiti:candidateUsers="${activityDemoServiceImpl.findUsersForSL(execution)}"></userTask>
    <sequenceFlow id="flow2" sourceRef="servicetask1" targetRef="usertask1"></sequenceFlow>
    <exclusiveGateway id="exclusivegateway1" name="Exclusive Gateway"></exclusiveGateway>
    <sequenceFlow id="flow3" sourceRef="usertask1" targetRef="exclusivegateway1"></sequenceFlow>
    <userTask id="usertask2" name="審批" activiti:candidateUsers="${activityDemoServiceImpl.findUsersForSP(execution)}"></userTask>
    <sequenceFlow id="flow4" sourceRef="exclusivegateway1" targetRef="usertask2">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${sign=="true"}]]></conditionExpression>
    </sequenceFlow>
    <serviceTask id="servicetask2" name="已簽發" activiti:expression="#{activityDemoServiceImpl.updateBizStatus(execution,"yqf")}"></serviceTask>
    <endEvent id="endevent1" name="End"></endEvent>
    <sequenceFlow id="flow6" sourceRef="servicetask2" targetRef="endevent1"></sequenceFlow>
    <serviceTask id="servicetask3" name="資料不全" activiti:async="true" activiti:expression="#{activityDemoServiceImpl.updateBizStatus(execution,"zlbq")}"></serviceTask>
    <sequenceFlow id="flow8" sourceRef="exclusivegateway1" targetRef="servicetask3">
      <conditionExpression xsi:type="tFormalExpression"><![CDATA[${sign=="false"}]]></conditionExpression>
    </sequenceFlow>
    <sequenceFlow id="flow9" sourceRef="servicetask3" targetRef="endevent1"></sequenceFlow>
    <exclusiveGateway id="exclusivegateway2" name="Exclusive Gateway"></exclusiveGateway>
    <sequenceFlow id="flow10" sourceRef="usertask2" targetRef="exclusivegateway2"></sequenceFlow>
    <sequenceFlow id="flow11" sourceRef="exclusivegateway2" targetRef="servicetask2"></sequenceFlow>
    <sequenceFlow id="flow12" sourceRef="exclusivegateway2" targetRef="servicetask3"></sequenceFlow>
  </process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_demo5">
    <bpmndi:BPMNPlane bpmnElement="demo5" id="BPMNPlane_demo5">
      <bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">
        <omgdc:Bounds height="35.0" width="35.0" x="120.0" y="220.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="servicetask1" id="BPMNShape_servicetask1">
        <omgdc:Bounds height="55.0" width="105.0" x="200.0" y="210.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1">
        <omgdc:Bounds height="55.0" width="105.0" x="350.0" y="210.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="exclusivegateway1" id="BPMNShape_exclusivegateway1">
        <omgdc:Bounds height="40.0" width="40.0" x="500.0" y="217.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="usertask2" id="BPMNShape_usertask2">
        <omgdc:Bounds height="55.0" width="105.0" x="560.0" y="210.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="servicetask2" id="BPMNShape_servicetask2">
        <omgdc:Bounds height="55.0" width="105.0" x="780.0" y="210.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">
        <omgdc:Bounds height="35.0" width="35.0" x="910.0" y="217.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="servicetask3" id="BPMNShape_servicetask3">
        <omgdc:Bounds height="55.0" width="105.0" x="670.0" y="70.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape bpmnElement="exclusivegateway2" id="BPMNShape_exclusivegateway2">
        <omgdc:Bounds height="40.0" width="40.0" x="702.0" y="217.0"></omgdc:Bounds>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">
        <omgdi:waypoint x="155.0" y="237.0"></omgdi:waypoint>
        <omgdi:waypoint x="200.0" y="237.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">
        <omgdi:waypoint x="305.0" y="237.0"></omgdi:waypoint>
        <omgdi:waypoint x="350.0" y="237.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3">
        <omgdi:waypoint x="455.0" y="237.0"></omgdi:waypoint>
        <omgdi:waypoint x="500.0" y="237.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow4" id="BPMNEdge_flow4">
        <omgdi:waypoint x="540.0" y="237.0"></omgdi:waypoint>
        <omgdi:waypoint x="560.0" y="237.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow6" id="BPMNEdge_flow6">
        <omgdi:waypoint x="885.0" y="237.0"></omgdi:waypoint>
        <omgdi:waypoint x="910.0" y="234.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow8" id="BPMNEdge_flow8">
        <omgdi:waypoint x="520.0" y="217.0"></omgdi:waypoint>
        <omgdi:waypoint x="520.0" y="97.0"></omgdi:waypoint>
        <omgdi:waypoint x="670.0" y="97.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow9" id="BPMNEdge_flow9">
        <omgdi:waypoint x="775.0" y="97.0"></omgdi:waypoint>
        <omgdi:waypoint x="927.0" y="97.0"></omgdi:waypoint>
        <omgdi:waypoint x="927.0" y="217.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow10" id="BPMNEdge_flow10">
        <omgdi:waypoint x="665.0" y="237.0"></omgdi:waypoint>
        <omgdi:waypoint x="702.0" y="237.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow11" id="BPMNEdge_flow11">
        <omgdi:waypoint x="742.0" y="237.0"></omgdi:waypoint>
        <omgdi:waypoint x="780.0" y="237.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge bpmnElement="flow12" id="BPMNEdge_flow12">
        <omgdi:waypoint x="722.0" y="217.0"></omgdi:waypoint>
        <omgdi:waypoint x="722.0" y="125.0"></omgdi:waypoint>
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</definitions>

解析：

    （1）從代碼中我們可以看到一些像java類名和方法的字樣，如<serviceTask id="servicetask2" name="已簽發" activiti:expression="#{activityDemoServiceImpl.updateBizStatus(execution,'yqf')}"></serviceTask>這段代碼就是進入該“已簽發”流程節點時候，先進行調用activityDemoServiceImpl這個類中updateBizStatus方法。

    （2） <sequenceFlow id="flow4" sourceRef="exclusivegateway1" targetRef="usertask2"><conditionExpression xsi:type="tFormalExpression"><![CDATA[${sign=="true"}]]></conditionExpression></sequenceFlow>這段代碼意思是當你傳入到後臺 sign = "true"的時候，走flow4的這條線，從exclusivegateway1到usertask2節點。

2.搭建springboot+maven的項目

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demo5.bpmn文件放入到resources/templates目錄下

4)編寫一個controller類

代碼如下：

@RestController
@RequestMapping("/demo5")
public class Demo5Controller {

    @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/demo5.bpmn").deploy();
        //獲取流程定義
        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId(deployment.getId()).singleResult();

        System.out.println(processDefinition.getId()+";"+processDefinition.getKey());
        //啓動流程定義，返回流程實例(提供了多種方式)
        //ProcessInstance pi = runtimeService.startProcessInstanceById(processDefinition.getId());
        ProcessInstance pi = runtimeService.startProcessInstanceByKey("demo5");
        System.out.println("流程創建成功，當前流程實例ID："+pi.getId());

        List<Task> resultTask = taskService.createTaskQuery().processDefinitionKey("demo5").taskCandidateOrAssigned("sly1").list();
        System.out.println("任務列表："+resultTask);

        //在受理節點中,用戶sly1表示通過該節點，進入下一個節點審批(true:通過,false：不通過)
        taskService.claim(resultTask.get(0).getId(), "sly1");
        Map<String,Object> vars = new HashMap<String,Object>();
        vars.put("sign", "true");
        taskService.complete(resultTask.get(0).getId(), vars);

        Task task = taskService.createTaskQuery().processInstanceId(pi.getId()).singleResult();
        System.out.println("當前節點："+task.getName());

        //在審批節點中,用戶uspy2表示通過該節點,進入下個系統節點“簽發”中
        resultTask = taskService.createTaskQuery().processDefinitionKey("demo5").taskCandidateOrAssigned("uspy2").list();
        taskService.claim(resultTask.get(0).getId(), "sly1");
        Map<String,Object> vars2 = new HashMap<String,Object>();
        vars2.put("sign", "true");
        taskService.complete(resultTask.get(0).getId(), vars2);
    }
}

5)編寫一個service類

代碼如下

@Service
public class ActivityDemoServiceImpl {

    /**
     * 更改業務流程狀態#{ActivityDemoServiceImpl.updateBizStatus(execution,"tj")}
     * @param execution
     * @param status
     */
    public void updateBizStatus(DelegateExecution execution, String status) {
        String bizId = execution.getProcessBusinessKey();
        //根據業務id自行處理業務表
        System.out.println("業務表["+bizId+"]狀態更改成功，狀態更改爲："+status);
    }

    //流程節點權限用戶列表${ActivityDemoServiceImpl.findUsers(execution,sign)}
    public List<String> findUsersForSL(DelegateExecution execution){
        //return Arrays.asList("sly1","sly2");
        return Arrays.asList("sly1");
    }

    //流程節點權限用戶列表${ActivityDemoServiceImpl.findUsers(execution,sign)}
    public List<String> findUsersForSP(DelegateExecution execution){
        return Arrays.asList("uspy2");
    }

}

解析：findUserForSL方法中，主要內容是設置該流程節點的辦理人"sly1"

5)啓動application.java類，訪問http://localhost:8081/workFlow/demo5/firstDemo,查看控制檯