Activiti的helloworld

　　所有语言的第一个程序都叫helloworld，姑且也称这第一个activiti程序为helloworld。

　　一个工作流想要实现，必定有一个对应的部署文件，利用流程设计器设计一个简单的流程，请假->部门经理审批->总经理审批。生成的部署文件如下

<?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: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="helloworld" name="helloworldprocess" isExecutable="true">

<startEvent id="startevent1" name="Start"></startEvent>

<endEvent id="endevent1" name="End"></endEvent>

<userTask id="usertask1" name="申请请假" activiti:assignee="张三"></userTask>

<userTask id="usertask2" name="部门审批" activiti:assignee="李四"></userTask>

<userTask id="usertask3" name="经理审批" activiti:assignee="王五"></userTask>

<sequenceFlow id="flow1" sourceRef="startevent1" targetRef="usertask1"></sequenceFlow>

<sequenceFlow id="flow2" sourceRef="usertask1" targetRef="usertask2"></sequenceFlow>

<sequenceFlow id="flow3" sourceRef="usertask2" targetRef="usertask3"></sequenceFlow>

<sequenceFlow id="flow4" sourceRef="usertask3" targetRef="endevent1"></sequenceFlow>

</process>

<bpmndi:BPMNDiagram id="BPMNDiagram_helloworld">

<bpmndi:BPMNPlane bpmnElement="helloworld" id="BPMNPlane_helloworld">

<bpmndi:BPMNShape bpmnElement="startevent1" id="BPMNShape_startevent1">

<omgdc:Bounds height="35.0" width="35.0" x="400.0" y="20.0"></omgdc:Bounds>

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="endevent1" id="BPMNShape_endevent1">

<omgdc:Bounds height="35.0" width="35.0" x="400.0" y="440.0"></omgdc:Bounds>

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="usertask1" id="BPMNShape_usertask1">

<omgdc:Bounds height="55.0" width="105.0" x="365.0" y="100.0"></omgdc:Bounds>

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="usertask2" id="BPMNShape_usertask2">

<omgdc:Bounds height="55.0" width="105.0" x="365.0" y="210.0"></omgdc:Bounds>

</bpmndi:BPMNShape>

<bpmndi:BPMNShape bpmnElement="usertask3" id="BPMNShape_usertask3">

<omgdc:Bounds height="55.0" width="105.0" x="365.0" y="340.0"></omgdc:Bounds>

</bpmndi:BPMNShape>

<bpmndi:BPMNEdge bpmnElement="flow1" id="BPMNEdge_flow1">

<omgdi:waypoint x="417.0" y="55.0"></omgdi:waypoint>

<omgdi:waypoint x="417.0" y="100.0"></omgdi:waypoint>

</bpmndi:BPMNEdge>

<bpmndi:BPMNEdge bpmnElement="flow2" id="BPMNEdge_flow2">

<omgdi:waypoint x="417.0" y="155.0"></omgdi:waypoint>

<omgdi:waypoint x="417.0" y="210.0"></omgdi:waypoint>

</bpmndi:BPMNEdge>

<bpmndi:BPMNEdge bpmnElement="flow3" id="BPMNEdge_flow3">

<omgdi:waypoint x="417.0" y="265.0"></omgdi:waypoint>

<omgdi:waypoint x="417.0" y="340.0"></omgdi:waypoint>

</bpmndi:BPMNEdge>

<bpmndi:BPMNEdge bpmnElement="flow4" id="BPMNEdge_flow4">

<omgdi:waypoint x="417.0" y="395.0"></omgdi:waypoint>

<omgdi:waypoint x="417.0" y="440.0"></omgdi:waypoint>

</bpmndi:BPMNEdge>

</bpmndi:BPMNPlane>

</bpmndi:BPMNDiagram>

</definitions>

　　在helloworld中，首先部署好该流程图，代码如下

ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();

    /**部署流程定义*/

    @Test

    public void deploymentProcessDefinition()

    {

        Deployment deployment = processEngine.getRepositoryService()//与流程定义和部署相关的service

            .createDeployment()//创建一个部署对象

            .name("helloword入门")//添加部署名称

            .addClasspathResource("diagrams/helloworld.bpmn")//从calsspath中加载，一次一个

            .addClasspathResource("diagrams/helloworld.png")

            .deploy();//完成部署

        System.out.println(deployment.getId());

        System.out.println(deployment.getName());

    }

　　这样在数据库act_ge_bytearray，act_re_procdef中可以看到有数据插入，表明部署已经完成。

　　接下来就是要启动流程，流程启动代码如下

/**启动流程实例*/

    @Test

    public void startProcessInstance()

    {

        String processDefinitionKey = "helloworld";

        ProcessInstance pi = processEngine.getRuntimeService()//正在执行的流程实例和执行对象相关的service

        .startProcessInstanceByKey(processDefinitionKey);//使用流程定义的key启动流程实例，key对应helloworld.bpnm文件中的key 默认按最新的启动

        System.out.println(pi.getId());//流程实例id 101

        System.out.println(pi.getProcessDefinitionId());//流程定义id helloworld:1:4

    }

　　可以在act_ru_task中看到这条数据，表明流程已经启动

　　流程已经启动，必然要开始处理，因此要能查看个人任务，代码如下

/**查询个人任务*/

    @Test

    public void findMypersonalTask()

    {

        String assignee = "张三";

        List<Task> list = processEngine.getTaskService()//正在执行任务相关的service

                     .createTaskQuery()//创建任务查询对象

                     .taskAssignee(assignee)//指定个人任务查询 办理人

                     .list();//返回列表

        if(list!=null&&list.size()>-1)

        {

            for(Task task:list)

            {

                System.out.println("任务ID:"+task.getId());

                System.out.println("任务名称:"+task.getName());

                System.out.println("任务的创建时间:"+task.getCreateTime());

                System.out.println("任务的办理人:"+task.getAssignee());

                System.out.println("流程实例ID："+task.getProcessInstanceId());

                System.out.println("执行对象ID:"+task.getExecutionId());

                System.out.println("流程定义ID:"+task.getProcessDefinitionId());

                System.out.println("########################################################");

            }

        }

    }

　　此处查询所有签收人为张三的任务。

　　查询到个人代办业务后就要开始处理业务，代码如下

/**完成我的任务*/

    @Test

    public void completeMyPersonalTask()

    {

        String taskId = "104";

        processEngine.getTaskService()//正在进行任务

                    .complete(taskId);

        System.out.println("完成任务，任务id为"+taskId);

    }

　　完成任务后 act_ru_task中数据会产生变化，表明流程已经进入下个阶段。

HelloWorld

Activiti的helloworld