Spring Activities

原创已于 2024-02-02 19:54:30 修改 · 937 阅读

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于 2024-02-02 19:53:28 首次发布

本文详细介绍了如何在SpringBoot项目中集成Activiti框架，包括设置SpringBoot项目、添加Activiti依赖、创建BPMN文件以及编写启动流程的Java类。步骤包括配置pom.xml、创建过程定义文件并使用ProcessService启动流程实例。

Activiti is an open-source BPM (Business Process Management) framework that integrates with Spring to provide workflow and business process automation capabilities. To get started with Spring and Activiti, you can follow the steps below:

Step 1: Set Up a Spring Boot Project

Create a new Spring Boot project using Spring Initializr: Spring Initializr.
- Choose the desired project settings (e.g., Java version, packaging, dependencies).
- Add the "Spring Web" and "Spring Data JPA" dependencies.
Download the project and extract it.

Step 2: Add Activiti Dependency

Open the pom.xml file in your project.
Add the Activiti dependency:

<dependency>
    <groupId>org.activiti</groupId>
    <artifactId>activiti-spring-boot-starter-basic</artifactId>
    <version>7.1.0.M6</version>
</dependency>

Ensure that you use the latest version of Activiti available

Create a new directory named src/main/resources/processes.

Inside the processes directory, create a BPMN file (e.g., simpleProcess.bpmn20.xml). Here is an example BPMN process:

<?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"
             targetNamespace="Examples">

  <process id="simpleProcess" name="Simple Process" isExecutable="true">
    <startEvent id="startEvent" />
    <sequenceFlow id="flow1" sourceRef="startEvent" targetRef="task1" />
    <userTask id="task1" name="User Task 1">
      <documentation>First User Task</documentation>
    </userTask>
    <sequenceFlow id="flow2" sourceRef="task1" targetRef="endEvent" />
    <endEvent id="endEvent" />
  </process>

</definitions>

Create a Java class for starting the process. For example, ProcessService.java:

import org.activiti.engine.RuntimeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class ProcessService {

    @Autowired
    private RuntimeService runtimeService;

    public void startProcess() {
        runtimeService.startProcessInstanceByKey("simpleProcess");
    }
}

Open the main application class (the one with @SpringBootApplication) and add the @SpringBootApplication annotation:

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ActivitiSpringBootApplication {

    public static void main(String[] args) {
        SpringApplication.run(ActivitiSpringBootApplication.class, args);
    }
}

Run your Spring Boot application.
Use a tool like Postman or your web browser to make a POST request to http://localhost:8080/actuator/activiti/process/start.
Check the console logs for any errors or successful process initiation.