Spring Boot整合Activiti（一）

本系列主要讲述本人（初次接触Activiti）Spring Boot与Activiti的整合流程。

开发工具：IDEA

1 什么是Activiti？

转自 https://blog.youkuaiyun.com/zbdxcyg/article/details/78519773 by 莱克寇丁

2 创建一个简单的Spring Boot项目

创建Spring Boot项目的源码很多，这里为了保证运行效果，贴上我的项目目录，pom，application.yml以及启动类源码

导入Activiti包（IDEA主页面操作：ctrl+alt+s，选择plugins，并搜索actiBPM，点击安装，安装完成后重启IDEA）：

项目目录：

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.activiti</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-spring-boot-starter-basic</artifactId>
            <version>5.21.0</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

application.yml

---
server:
  port: 8081
spring:
  activiti:
    check-process-definitions: false
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    password: 123456
    url: "jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8&useSSL=false"
    username: root

DemoApplication.java

package com.activiti.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication(exclude = {
        org.activiti.spring.boot.SecurityAutoConfiguration.class,
})
@RestController
public class DemoApplication {

    @RequestMapping(value = "/")
    public String index(){
        return "Hello World";
    }
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

浏览器中输入http://localhost:8081即可运行

运行工程后，可以看到对应的mysql数据库自动生成了数据表（由Activiti自动生成）

4 在IDEA中画流程图

（多数人认为eclipse的画图会更为方便，大家自行选择，本文选用IDEA）

右键点击即可新建bpmn文件-test.bpmn

左侧为画图区域，右侧则是各类组件

画图步骤请参考：（转）http://www.cnblogs.com/cat520/p/9322236.html （包括生成图片的乱码问题）

图片画完以后，保存到classpath:/templates文件夹下：

通过将该流程图后缀改为xml，即可看到流程图的xml代码

注：如果使用xml来生成流程图，务必保证process的id唯一性

生成的流程图如下：

5 编写一个demo类进行测试

package com.activiti.demo.controller;

import org.activiti.engine.RepositoryService;
import org.activiti.engine.RuntimeService;
import org.activiti.engine.TaskService;
import org.activiti.engine.repository.Deployment;
import org.activiti.engine.repository.ProcessDefinition;
import org.activiti.engine.runtime.ProcessInstance;
import org.activiti.engine.task.Task;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/demo")
public class DemoController {
    @Autowired
    private RepositoryService repositoryService;
    @Autowired
    private RuntimeService runtimeService;
    @Autowired
    private TaskService taskService;

    @RequestMapping("/first")
    public void first() {

        //根据bpmn文件部署流程
        Deployment deployment = repositoryService.createDeployment().addClasspathResource("templates/test.bpmn").deploy();
        //流程定义
        ProcessDefinition processDefinition = repositoryService.createProcessDefinitionQuery().deploymentId(deployment.getId()).singleResult();
        //流程实例化
        ProcessInstance processInstance = runtimeService.startProcessInstanceById(processDefinition.getId());
        String processId = processInstance.getId();
        System.out.println("流程开始："+processId);

        Task task=taskService.createTaskQuery().processInstanceId(processId).singleResult();
        System.out.println("执行任务："+task.getName());
        taskService.complete(task.getId());

        task = taskService.createTaskQuery().processInstanceId(processId).singleResult();
        System.out.println("任务结束："+task);
    }
}

启动Application，并在浏览器中执行 http://localhost:8081/demo/first

可以看到后台结果：

这就是一个简单的Spring Boot + Activiti实例

源码下载 ：https://pan.baidu.com/s/14o9d_t_ipwR5zrZgBltFxA