activiti7---自定义流程图（springboot项目）
之前的文章中我们绘制流程图时，都是需要依赖IDEA的activiti7插件，不灵活。
本篇文章的目的是通过特定的数据结构，能实现前端页面自定义配置流程图。
1.yml文件
spring:
datasource:
url: jdbc:mysql://ip:3306/activiti7?useUnicode=true&useSSL=false&zeroDateTimeBehavior=convertToNull&characterEncoding=utf8&serverTimezone=GMT%2B8
username : root
password : root
driver-class-name: com.mysql.jdbc.Driver
activiti:
#Activiti记录历史任务数据级别，full是最全的，方便日后查询使用
history-level: full
#创建数据库历史数据表
db-history-used: true2.pom文件（主要依赖）
org.activiti
activiti-spring-boot-starter
7.0.0.SR1
org.activiti
activiti-image-generator
5.22.0
org.activiti
activiti-bpmn-layout
6.0.0.RC1
3.安全配置类
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
@Configuration
@EnableWebSecurity
@Order(1)
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {
/**
* aciviti7默认整合springSecurity,这里全部放行
* @param http
* @throws Exception
*/
@Override
protected void configure(HttpSecurity http) throws Exception {
http.csrf().disable().authorizeRequests().anyRequest().permitAll();
}
}4.流程图基本信息类
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class WorkFlow {
private Integer id;
private String name;
private String content;
}
5.流程图步骤类
import lombok.AllArgsConstructor;
import lombok.Data;
import java.util.List;
@Data
@AllArgsConstructor
public class Step {
private Integer id;
private Integer workFlowId;
private String name;
private Integer type;
private Integer orderId;
//接下要执行的步骤，用于连线
private List chlidOrderIds;
private String conditionExpression;
private String assignee;
//0为人工任务，1为服务于任务
//private Integer taskType;
}
6.流程的定义与部署
其它的查询任务，执行任务与之前的逻辑一致。
import com.example.springactiviti.entity.Step;
import com.example.springactiviti.entity.WorkFlow;
import org.activiti.bpmn.BpmnAutoLayout;
import org.activiti.bpmn.model.*;
import org.activiti.bpmn.model.Process;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.RepositoryService;
import org.activiti.engine.TaskService;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.runtime.Execution;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.activiti.image.ProcessDiagramGenerator;
import org.activiti.image.impl.DefaultProcessDiagramGenerator;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@RestController
public class ProcessController3 {
@Autowired
private RepositoryService repositoryService; //流程定义和流程部署相关功能
@Autowired
private ProcessEngine processEngine; //流程引擎
/**
* 动态流程实例并输出png和xml
*
* @throws IOException
*/
@GetMapping("/createDeployment3")
public String createDeployment3() throws IOException {
//模拟前端页面数据
WorkFlow workFlow = new WorkFlow(1, "test", "流程测试");
List stepList = new ArrayList<>();
List childList1 = new ArrayList<>();
childList1.add(2);
Step s1 = new Step(1, workFlow.getId(), "start", 1, 1, childList1, null, null);
List childList2 = new ArrayList<>();
childList2.add(3);
childList2.add(4);
Step s2 = new Step(2, workFlow.getId(), "parallelGateway-fork", 2, 2, childList2, null, "a");
List childList3 = new ArrayList<>();
childList3.add(6);
Step s3 = new Step(3, workFlow.getId(), "task1", 0, 3, childList3, null, "a");
List childList4 = new ArrayList<>();
childList4.add(5);
Step s4 = new Step(4, workFlow.getId(), "task2", 0, 4, childList4, null, "a");
List childList5 = new ArrayList<>();
childList5.add(6);
Step s5 = new Step(5, workFlow.getId(), "task22", 0, 5, childList5, null, "a");
List childList6 = new ArrayList<>();
childList6.add(7);
Step s6 = new Step(6, workFlow.getId(), "parallelGateway-join", 3, 6, childList6, null, "a");
List childList7 = new ArrayList<>();
childList7.add(8);
childList7.add(9);
Step s7 = new Step(7, workFlow.getId(), "exclusiveGate", 4, 7, childList7, null, "a");
List childList8 = new ArrayList<>();
childList8.add(10);
Step s8 = new Step(8, workFlow.getId(), "task3", 0, 8, childList8, "${flag=='true'}", "a");
List childList9 = new ArrayList<>();
childList9.add(10);
Step s9 = new Step(9, workFlow.getId(), "task4", 0, 9, childList9, "${flag=='false'}", "a");
List childList10 = new ArrayList<>();
childList10.add(11);
Step s10 = new Step(10, workFlow.getId(), "receiveTask", 6, 10, childList10, null, "a");
Step s11 = new Step(11, workFlow.getId(), "end", 5, 11, new ArrayList<>(), null, "a");
stepList.add(s1);
stepList.add(s2);
stepList.add(s3);
stepList.add(s4);
stepList.add(s5);
stepList.add(s6);
stepList.add(s7);
stepList.add(s8);
stepList.add(s9);
stepList.add(s10);
stepList.add(s11);
//创建ProcessEngine对象
ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
//得到RepositoryService
RepositoryService repositoryService = processEngine.getRepositoryService();
// 1. 建立模型
BpmnModel model = new BpmnModel();
Process process = new Process();
model.addProcess(process);
process.setId(workFlow.getName());
process.setName(workFlow.getName());
stepList.forEach(step -> {
if (step.getType() == 1) {
process.addFlowElement(createStartEvent());
} else if (step.getType() == 5) {
process.addFlowElement(createEndEvent());
} else if (step.getType() == 2 || step.getType() == 3) {
process.addFlowElement(createParallelGateway(step.getName(), step.getName()));
} else if (step.getType() == 4) {
process.addFlowElement(createExclusiveGateway(step.getName(), step.getName()));
} else if (step.getType() == 6) {
process.addFlowElement(createReceiveTask(step.getName(), step.getName()));
} else {
process.addFlowElement(createUserTask(step.getName(), step.getName(), step.getAssignee()));
}
});
//连线
stepList.forEach(step -> {
List childList = step.getChlidOrderIds();
childList.forEach(child -> {
stepList.forEach(step1 -> {
if (step1.getOrderId() == child) {
if (step.getType() == 4) {
process.addFlowElement(createSequenceFlow(step.getName(), step1.getName(), step1.getConditionExpression()));
} else {
process.addFlowElement(createSequenceFlow(step.getName(), step1.getName(), null));
}
}
});
});
});
//定义并设置流程变量
Map variables = new HashMap<>();
variables.put("flag", 1 == 2);
//deploy
Deployment deployment = repositoryService.createDeployment().addBpmnModel("process/dynamic-model.bpmn", model).name("Dynamic process deployment").deploy();
System.out.println("deploymentId:"+deployment.getId());
//start
ProcessInstance processInstance = processEngine.getRuntimeService().startProcessInstanceByKey(workFlow.getName(), variables);
System.out.println("processInstanceId:" + processInstance.getId());
System.out.println("getProcessDefinitionId:"+processInstance.getProcessDefinitionId());
BpmnModel bpmnModel = repositoryService.getBpmnModel(processInstance.getProcessDefinitionId());
//save as png
new BpmnAutoLayout(bpmnModel).execute();
List highLightedActivities = processEngine.getRuntimeService().getActiveActivityIds(processInstance.getId());// 高亮节点
List highLightedFlows = new ArrayList<>(); // 高亮连接线
ProcessDiagramGenerator processDiagramGenerator = new DefaultProcessDiagramGenerator();
InputStream inputStream = processDiagramGenerator.generateDiagram(bpmnModel, "png", highLightedActivities, highLightedFlows, "宋体", "宋体", "宋体", null, 1.0);
FileUtils.copyInputStreamToFile(inputStream, new File("C:\\Users\\Administrator\\Desktop\\process.png"));
//save sa xml
InputStream inputStreamXml = processEngine.getRepositoryService().getResourceAsStream(deployment.getId(), "process/dynamic-model.bpmn");
FileUtils.copyInputStreamToFile(inputStreamXml, new File("C:\\Users\\Administrator\\Desktop\\process.bpmn.xml"));
return processInstance.getId();
}
/**
* 开始事件
*
* @return
*/
StartEvent createStartEvent() {
StartEvent startEvent = new StartEvent();
startEvent.setId("start");
return startEvent;
}
/**
* 结束事件
*
* @return
*/
EndEvent createEndEvent() {
EndEvent endEvent = new EndEvent();
endEvent.setId("end");
return endEvent;
}
/**
* 创建用户任务
*
* @param id
* @param name
* @param assignee
* @return
*/
UserTask createUserTask(String id, String name, String assignee) {
UserTask userTask = new UserTask();
userTask.setName(name);
userTask.setId(id);
userTask.setAssignee(assignee);
return userTask;
}
/**
* 创建接收任务
*
* @param id
* @param name
* @return
*/
ReceiveTask createReceiveTask(String id, String name) {
ReceiveTask receiveTask = new ReceiveTask();
receiveTask.setId(id);
receiveTask.setName(name);
return receiveTask;
}
/**
* 连线
*
* @param from
* @param to
* @return
*/
SequenceFlow createSequenceFlow(String from, String to, String conditionExpression) {
SequenceFlow sequenceFlow = new SequenceFlow();
sequenceFlow.setSourceRef(from);
sequenceFlow.setTargetRef(to);
if (StringUtils.isNotBlank(conditionExpression)) {
sequenceFlow.setConditionExpression(conditionExpression);
}
return sequenceFlow;
}
/**
* 排他网关
*
* @param id
* @param name
* @return
*/
ExclusiveGateway createExclusiveGateway(String id, String name) {
ExclusiveGateway exclusiveGateway = new ExclusiveGateway();
exclusiveGateway.setId(id);
exclusiveGateway.setName(name);
return exclusiveGateway;
}
/**
* 并行网关
*
* @return
*/
ParallelGateway createParallelGateway(String id, String name) {
ParallelGateway parallelGateway = new ParallelGateway();
parallelGateway.setId(id);
parallelGateway.setName(name);
return parallelGateway;
}
}
7.效果图
