xmlns:camunda="http://camunda.org/schema/1.0/bpmn"

这是一个XML命名空间声明，它定义了一个名为camunda的命名空间，其URI为"http://camunda.org/schema/1.0/bpmn"。这个命名空间通常在BPMN（Business Process Model and Notation）文件中使用，用于引用与Camunda BPM引擎相关的扩展元素和属性。

相关问题

请以上面代码为原型帮我画出leave_process.bpmn 流程定义文件

抱歉，作为语言模型的我无法画图，但我可以为您提供流程定义文件的示例代码，您可以参考该示例代码进行修改：

<?xml version="1.0" encoding="UTF-8"?>
<bpmn:definitions xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL" xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI" xmlns:dc="http://www.omg.org/spec/DD/20100524/DC" xmlns:di="http://www.omg.org/spec/DD/20100524/DI" id="Definitions_1" targetNamespace="http://bpmn.io/schema/bpmn" exporter="Camunda Modeler" exporterVersion="4.3.1">
  <bpmn:process id="Process_1" isExecutable="true">
    <bpmn:startEvent id="StartEvent_1">
      <bpmn:outgoing>Flow_1</bpmn:outgoing>
    </bpmn:startEvent>
    <bpmn:sequenceFlow id="Flow_1" sourceRef="StartEvent_1" targetRef="Task_1" />
    <bpmn:userTask id="Task_1" name="请假申请">
      <bpmn:extensionElements>
        <camunda:formData>
          <camunda:formField id="leaveType" label="请假类型" type="string" />
          <camunda:formField id="startDate" label="开始日期" type="date" />
          <camunda:formField id="endDate" label="结束日期" type="date" />
          <camunda:formField id="reason" label="请假事由" type="string" />
        </camunda:formData>
      </bpmn:extensionElements>
      <bpmn:incoming>Flow_1</bpmn:incoming>
      <bpmn:outgoing>Flow_2</bpmn:outgoing>
    </bpmn:userTask>
    <bpmn:sequenceFlow id="Flow_2" sourceRef="Task_1" targetRef="Task_2" />
    <bpmn:userTask id="Task_2" name="审批">
      <bpmn:incoming>Flow_2</bpmn:incoming>
      <bpmn:outgoing>Flow_3</bpmn:outgoing>
      <bpmn:extensionElements>
        <camunda:inputOutput>
          <camunda:inputParameter name="leaveType">${leaveType}</camunda:inputParameter>
          <camunda:inputParameter name="startDate">${startDate}</camunda:inputParameter>
          <camunda:inputParameter name="endDate">${endDate}</camunda:inputParameter>
          <camunda:inputParameter name="reason">${reason}</camunda:inputParameter>
        </camunda:inputOutput>
        <camunda:formData>
          <camunda:formField id="approve" label="是否批准" type="boolean" />
          <camunda:formField id="comment" label="审批意见" type="string" />
        </camunda:formData>
      </bpmn:extensionElements>
    </bpmn:userTask>
    <bpmn:sequenceFlow id="Flow_3" sourceRef="Task_2" targetRef="EndEvent_1" />
    <bpmn:endEvent id="EndEvent_1">
      <bpmn:incoming>Flow_3</bpmn:incoming>
    </bpmn:endEvent>
  </bpmn:process>
  <bpmndi:BPMNDiagram id="BPMNDiagram_1">
    <bpmndi:BPMNPlane id="BPMNPlane_1" bpmnElement="Process_1">
      <bpmndi:BPMNShape id="_BPMNShape_StartEvent_2" bpmnElement="StartEvent_1">
        <dc:Bounds x="173" y="102" width="36" height="36" />
        <bpmndi:BPMNLabel>
          <dc:Bounds x="181" y="138" width="22" height="14" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="Task_1_di" bpmnElement="Task_1">
        <dc:Bounds x="250" y="80" width="100" height="80" />
        <bpmndi:BPMNLabel>
          <dc:Bounds x="286" y="152" width="28" height="14" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="Task_2_di" bpmnElement="Task_2">
        <dc:Bounds x="440" y="80" width="100" height="80" />
        <bpmndi:BPMNLabel>
          <dc:Bounds x="466" y="152" width="28" height="14" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNShape id="EndEvent_1_di" bpmnElement="EndEvent_1">
        <dc:Bounds x="617" y="102" width="36" height="36" />
        <bpmndi:BPMNLabel>
          <dc:Bounds x="624" y="138" width="22" height="14" />
        </bpmndi:BPMNLabel>
      </bpmndi:BPMNShape>
      <bpmndi:BPMNEdge id="Flow_1_di" bpmnElement="Flow_1">
        <di:waypoint x="209" y="120" />
        <di:waypoint x="250" y="120" />
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge id="Flow_2_di" bpmnElement="Flow_2">
        <di:waypoint x="350" y="120" />
        <di:waypoint x="440" y="120" />
      </bpmndi:BPMNEdge>
      <bpmndi:BPMNEdge id="Flow_3_di" bpmnElement="Flow_3">
        <di:waypoint x="540" y="120" />
        <di:waypoint x="617" y="120" />
      </bpmndi:BPMNEdge>
    </bpmndi:BPMNPlane>
  </bpmndi:BPMNDiagram>
</bpmn:definitions>

您需要将该代码保存为 leave_process.bpmn 文件，即可使用该文件来部署 BPMN 流程。

camunda使用java代码创建简单的审核流程

首先，你需要在你的 Java 项目中添加 Camunda 的依赖。可以在 Maven 或 Gradle 中添加以下依赖：

<dependency>
    <groupId>org.camunda.bpm</groupId>
    <artifactId>camunda-engine</artifactId>
    <version>7.15.0</version>
</dependency>

接下来，你需要创建一个 BPMN 文件来定义你的审核流程。假设你的流程包括两个任务：创建请求和审核请求。你可以创建一个名为 `audit-process.bpmn` 的文件，内容如下：

<bpmn:definitions xmlns:bpmn="http://www.omg.org/spec/BPMN/20100524/MODEL"
                  xmlns:bpmndi="http://www.omg.org/spec/BPMN/20100524/DI"
                  xmlns:dc="http://www.omg.org/spec/DD/20100524/DC"
                  xmlns:di="http://www.omg.org/spec/DD/20100524/DI"
                  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                  id="Definitions_1"
                  targetNamespace="http://camunda.org/examples"
                  exporter="Camunda Modeler"
                  exporterVersion="4.3.1">
  <bpmn:process id="audit-process" name="Audit Process">
    <bpmn:startEvent id="start" name="Start"></bpmn:startEvent>
    <bpmn:sequenceFlow id="flow1" sourceRef="start" targetRef="create-request-task"></bpmn:sequenceFlow>
    <bpmn:userTask id="create-request-task" name="Create Request">
      <bpmn:extensionElements>
        <camunda:formData>
          <camunda:formField id="requester" label="Requester" type="string" />
          <camunda:formField id="request-date" label="Request Date" type="date" />
        </camunda:formData>
      </bpmn:extensionElements>
    </bpmn:userTask>
    <bpmn:sequenceFlow id="flow2" sourceRef="create-request-task" targetRef="review-request-task"></bpmn:sequenceFlow>
    <bpmn:userTask id="review-request-task" name="Review Request">
      <bpmn:extensionElements>
        <camunda:formData>
          <camunda:formField id="reviewer" label="Reviewer" type="string" />
          <camunda:formField id="review-date" label="Review Date" type="date" />
          <camunda:formField id="review-status" label="Review Status" type="enum" values="Approved,Rejected" />
        </camunda:formData>
      </bpmn:extensionElements>
      <bpmn:incoming>flow2</bpmn:incoming>
      <bpmn:outgoing>flow3</bpmn:outgoing>
    </bpmn:userTask>
    <bpmn:sequenceFlow id="flow3" sourceRef="review-request-task" targetRef="end"></bpmn:sequenceFlow>
    <bpmn:endEvent id="end" name="End"></bpmn:endEvent>
  </bpmn:process>
</bpmn:definitions>

在这个 BPMN 文件中，我们定义了两个用户任务：`Create Request` 和 `Review Request`。每个任务都有一些表单字段，可以在任务执行时进行输入和输出。我们还定义了一些流程变量，例如 `requester` 和 `reviewer`，以及一些流程流转顺序。

接下来，你可以在 Java 代码中使用 Camunda 引擎来启动流程并完成任务。假设你有以下的 Java 类：

import org.camunda.bpm.engine.ProcessEngine;
import org.camunda.bpm.engine.ProcessEngineConfiguration;
import org.camunda.bpm.engine.RuntimeService;
import org.camunda.bpm.engine.TaskService;
import org.camunda.bpm.engine.runtime.ProcessInstance;
import org.camunda.bpm.engine.task.Task;

public class AuditProcessExample {
  
  public static void main(String[] args) {
    // 创建 Camunda 引擎
    ProcessEngine processEngine = ProcessEngineConfiguration.createStandaloneProcessEngineConfiguration()
      .buildProcessEngine();

    // 获取 RuntimeService 和 TaskService
    RuntimeService runtimeService = processEngine.getRuntimeService();
    TaskService taskService = processEngine.getTaskService();

    // 启动流程实例
    ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("audit-process");

    // 完成 Create Request 任务
    Task createRequestTask = taskService.createTaskQuery()
      .processInstanceId(processInstance.getId())
      .taskDefinitionKey("create-request-task")
      .singleResult();
    taskService.complete(createRequestTask.getId());

    // 完成 Review Request 任务
    Task reviewRequestTask = taskService.createTaskQuery()
      .processInstanceId(processInstance.getId())
      .taskDefinitionKey("review-request-task")
      .singleResult();
    taskService.complete(reviewRequestTask.getId());

    // 关闭 Camunda 引擎
    processEngine.close();
  }
}

在这个例子中，我们启动流程实例并完成了 `Create Request` 和 `Review Request` 任务。你可以根据自己的需求进行修改和扩展。