基于springboot的flowable工做流实例实现
flowableUI 建立实例教程 https://www.cnblogs.com/nanstar/p/11959389.htmlhtml
Flowable 中文官网 https://tkjohn.github.io/flowable-userguide/#_deploying_a_process_definition
一、首先建立一空白的个springboot的项目
二、这里是编辑项目名称，我这里写的是flowabledemo
三、这个位置是选择配置的，由于是demo因此我没有选择任何配置
四、这里输入的是输出文件夹的名称，我选择了和项目文件名一致
五、建立完成以后打开项目：
在pomx里添加flowable和mysql依赖（生成数据库要用到），我选择的是MySQL数据库，由于我电脑上有现成的mysqljava
<dependency>
<groupId>org.flowable</groupId>
<artifactId>flowable-engine</artifactId>
<version>6.5.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.45</version>
</dependency>
六、这时候他会自动下载相应的文件，等待事件有点长，咱们能够去新加一个数据库，已备后用。
新建flowable数据库（数据库名字本身设定）mysql
七、而后在主函数入口部分添加数据库信息（用来自动生成所须要的表，原来的那句话须要注释或删除掉）
// SpringApplication.run(FlowabledemoApplication.class, args);
ProcessEngineConfiguration cfg = new StandaloneProcessEngineConfiguration()
.setJdbcUrl("jdbc:mysql://localhost:3306/flowable")
.setJdbcUsername("root")
.setJdbcPassword("123456")
.setJdbcDriver("com.mysql.jdbc.Driver")
.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
ProcessEngine processEngine = cfg.buildProcessEngine();
八、接着右键运行，生成数据库表信息。而后会在控制台输出很长的内容，等到输出中止，去数据库查看，会发现flowable数据库中新建了不少表，这样操做就能够继续了。
在运行实例的时候，关于数据库新建的这部分代码是不须要注释掉的（若数据库有更新的化会自动更新数据库内容）。git
九、接着书写一个关于请假的实例：
咱们须要再resource文件夹里新加配置文件 holiday-request.bpmn20.xml，内容是:github
<?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: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:flowable="http://flowable.org/bpmn"
typeLanguage="http://www.w3.org/2001/XMLSchema"
expressionLanguage="http://www.w3.org/1999/XPath"
targetNamespace="http://www.flowable.org/processdef">
<process id="holidayRequest" name="Holiday Request" isExecutable="true">
<startEvent id="startEvent"/>
<sequenceFlow sourceRef="startEvent" targetRef="approveTask"/>
<userTask id="approveTask" name="Approve or reject request" flowable:candidateGroups="managers"/>
<sequenceFlow sourceRef="approveTask" targetRef="decision"/>
<exclusiveGateway id="decision"/>
<sequenceFlow sourceRef="decision" targetRef="externalSystemCall">
<conditionExpression xsi:type="tFormalExpression">
<![CDATA[
${approved}
]]>
</conditionExpression>
</sequenceFlow>
<sequenceFlow sourceRef="decision" targetRef="sendRejectionMail">
<conditionExpression xsi:type="tFormalExpression">
<![CDATA[
${!approved}
]]>
</conditionExpression>
</sequenceFlow>
<serviceTask id="externalSystemCall" name="Enter holidays in external system"
flowable:class="com.flowable.flowabledemo.CallExternalSystemDelegate"/>
<sequenceFlow sourceRef="externalSystemCall" targetRef="holidayApprovedTask"/>
<userTask id="holidayApprovedTask" name="Holiday approved" flowable:assignee="${employee}"/>
<sequenceFlow sourceRef="holidayApprovedTask" targetRef="approveEnd"/>
<serviceTask id="sendRejectionMail" name="Send out rejection email"
flowable:class="com.flowable.flowabledemo.SendRejectionMail"/>
<!--这里的class须要注意，后边跟的路径是你项目类问价所在的相对位置，若运行的时候报错，须要来修改这里的位置代码-->
<sequenceFlow sourceRef="sendRejectionMail" targetRef="rejectEnd"/>
<endEvent id="approveEnd"/>
<endEvent id="rejectEnd"/>
</process>
</definitions>
十、接着在入口函数（main）下追加如下内容
/**
* 部署工做流文件到流程引擎，其实就是将xml文件解析成Java对象，从而能够在程序里使用.
*/
RepositoryService repositoryService = processEngine.getRepositoryService();
Deployment deployment = repositoryService.createDeployment()
.addClasspathResource("holiday-request.bpmn20.xml")
.deploy();
/**
* API使用
*/
ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery()
.deploymentId(deployment.getId())
.singleResult();
System.out.println("Found process definition : " + processDefinition.getName());
/**
* 初始化流程变量
*/
Scanner scanner= new Scanner(System.in);
System.out.println("Who are you?");
String employee = scanner.nextLine();
System.out.println("How many holidays do you want to request?");
Integer nrOfHolidays = Integer.valueOf(scanner.nextLine());
System.out.println("Why do you need them?");
String description = scanner.nextLine();
/**
* 经过RuntimeService启动一个流程实例，简称“启动流程”，这里就是启动请假流程
*/
RuntimeService runtimeService = processEngine.getRuntimeService();
Map<String, Object> variables = new HashMap<String, Object>();
variables.put("employee", employee);
variables.put("nrOfHolidays", nrOfHolidays);
variables.put("description", description);
ProcessInstance processInstance =
runtimeService.startProcessInstanceByKey("holidayRequest", variables);
/**
* 查询某个用户的任务
*/
TaskService taskService = processEngine.getTaskService();
List<Task> tasks = taskService.createTaskQuery().taskCandidateGroup("managers").list();
System.out.println("You have " + tasks.size() + " tasks:");
for (int i=0; i<tasks.size(); i++) {
System.out.println((i+1) + ") " + tasks.get(i).getName() + " created by [" + taskService.getVariables(tasks.get(i).getId()).get("employee") + "]");
}
/**
* 根据任务获取到这个任务涉及的流程变量
*/
System.out.println("Which task would you like to complete?");
int taskIndex = Integer.valueOf(scanner.nextLine());
Task task = tasks.get(taskIndex - 1);
Map<String, Object> processVariables = taskService.getVariables(task.getId());
System.out.println(processVariables.get("employee") + " wants " +
processVariables.get("nrOfHolidays") + " of holidays. Do you approve this?");
/**
* 若是是y,则流程结束
*/
boolean approved = scanner.nextLine().toLowerCase().equals("y");
variables = new HashMap<String, Object>();
variables.put("approved", approved);
taskService.complete(task.getId(), variables);
/**
* 查询历史数据，每一个步骤的花费的时间
*/
HistoryService historyService = processEngine.getHistoryService();
List<HistoricActivityInstance> activities =
historyService.createHistoricActivityInstanceQuery()
.processInstanceId(processInstance.getId())
.finished()
.orderByHistoricActivityInstanceEndTime().asc()
.list();
for (HistoricActivityInstance activity : activities) {
System.out.println(activity.getActivityId() + " took "
+ activity.getDurationInMillis() + " milliseconds");
}
十一、接着须要在主函数的同级目录下新建一个类文件 CallExternalSystemDelegate 内容是：
package com.flowable.flowabledemo;
import org.flowable.engine.delegate.DelegateExecution;
import org.flowable.engine.delegate.JavaDelegate;
public class CallExternalSystemDelegate implements JavaDelegate {
public void execute(DelegateExecution execution) {
System.out.println("Calling the external system for employee "
+ execution.getVariable("employee"));
}
}
目录层级展现
1三、运行截图：
这时候是员工身份进行操做。 依次输入：姓名 请假时长 请假理由spring
1四、敲击回车，这时候会进入到管理者的角色，会让你选择处理哪个请假事务，显示的是有16个任务，向上滚动能够查看具体的内容的编号，咱们刚才新建的任务编号是14，因此这里输入14，敲击回车继续
1五、这时候会列出请假者的名字，请假时长，须要你输入y来赞成这个请假请求。
1六、而后敲击回车，程序完成，并输出相关信息。
因而，一个简单的flowable工做流实例就算是完成了！
点击下载源文件 点我 Touch Mesql