Springboot 整合Activiti流程设计器 完成一个简单的请假流程

目录

• 1.前言
• 2.准备
• 3.下载解压
• 4.开始整合 mysql + activiti + thymeleaf
  • 2.配置文件
  • 3.复制文件
  • 4.加入控制器
  • 5.修改配置文件
  • 6.剔除启动类里面的安全校验
  • 7.项目启动完毕，查看数据库
  • 8.访问静态资源被拦截问题--》加入资源处理器
• 开始流程代码以及逻辑
  • 1.首先是创建模型
  • PS 模型建好了肯定要进行画模型 我对流程设计器进行了汉化，这样操作起来方便多了 我简单画一个
  • 2.模型创建完毕，需要把模型发布为可用的流程定义（Process definition） 需要进行部署
  • 3.发布后的模型称之为流程定义，开启流程操作
• 审核人界面进行审批/驳回（暂时未有这个功能）
• 写在最后
• 推荐学习：http://www.agilebpm.cn/
• 参考：
• 错误解决：
  • Could not write PNG file because no WriteAdapter is availble
• 代码实例开源：
• 码云：https://gitee.com/mrc1999/activiti

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.activiti</groupId>
<artifactId>activiti-spring-boot-starter-basic</artifactId>
<version>5.22.0</version>
</dependency> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

spring.datasource.url=jdbc:mysql://localhost:3306/demo?characterEncoding=utf8&serverTimezone=Asia/Shanghai&useSSL=false
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver##每次应用启动不检查Activiti数据表是否存在及版本号是否匹配 第一次设置为true 会自动创建表结构，之后即可设置为false 提高运行速度
spring.activiti.database-schema-update=true

@SpringBootApplication(exclude = {
org.activiti.spring.boot.SecurityAutoConfiguration.class, org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration.class
})

@Configuration
@EnableWebMvc
public class StaticResourceConfig implements WebMvcConfigurer { @Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
}}

@RequestMapping("createModel")
public String createModel(HttpServletRequest request, HttpServletResponse response){

String name = "请假流程";
String description = "这是一个请假流程";

String id = null;
try {
Model model = repositoryService.newModel();
String key = name;
//版本号
String revision = "1";
ObjectNode modelNode = objectMapper.createObjectNode();
modelNode.put(ModelDataJsonConstants.MODEL_NAME, name);
modelNode.put(ModelDataJsonConstants.MODEL_DESCRIPTION, description);
modelNode.put(ModelDataJsonConstants.MODEL_REVISION, revision);

model.setName(name);
model.setKey(key);
//模型分类 结合自己的业务逻辑
//model.setCategory(category);

model.setMetaInfo(modelNode.toString());

repositoryService.saveModel(model);
id = model.getId();

//完善ModelEditorSource
ObjectNode editorNode = objectMapper.createObjectNode();
editorNode.put("id", "canvas");
editorNode.put("resourceId", "canvas");
ObjectNode stencilSetNode = objectMapper.createObjectNode();
stencilSetNode.put("namespace",
"http://b3mn.org/stencilset/bpmn2.0#");
editorNode.put("stencilset", stencilSetNode);
repositoryService.addModelEditorSource(id, editorNode.toString().getBytes("utf-8"));

response.sendRedirect(request.getContextPath() + "/static/modeler.html?modelId=" + id);
} catch (Exception e) {
e.printStackTrace();
}

return "index";
}

@RequestMapping("deploymentModel")
@ResponseBody
public JSONObject deploymentModel(String id) throws Exception {

//获取模型
Model modelData = repositoryService.getModel(id);
byte[] bytes = repositoryService.getModelEditorSource(modelData.getId());

if (bytes == null) {
return JsonUtil.getFailJson("模型数据为空，请先设计流程并成功保存，再进行发布。");
}
JsonNode modelNode = modelNode = new ObjectMapper().readTree(bytes);

BpmnModel model = new BpmnJsonConverter().convertToBpmnModel(modelNode);
if (model.getProcesses().size() == 0) {
return JsonUtil.getFailJson("数据模型不符要求，请至少设计一条主线流程。");
}
byte[] bpmnBytes = new BpmnXMLConverter().convertToXML(model);

//发布流程
String processName = modelData.getName() + ".bpmn20.xml";
Deployment deployment = repositoryService.createDeployment()
.name(modelData.getName())
.addString(processName, new String(bpmnBytes, "UTF-8"))
.deploy();
modelData.setDeploymentId(deployment.getId());
repositoryService.saveModel(modelData);
return JsonUtil.getSuccessJson("流程发布成功");
}

1 @RequestMapping("deploymentModel")
2 @ResponseBody
3 public JSONObject deploymentModel(String id) throws Exception {
4
5 //获取模型
6 Model modelData = repositoryService.getModel(id);
7 byte[] bytes = repositoryService.getModelEditorSource(modelData.getId());
8
9 if (bytes == null) {
10 return JsonUtil.getFailJson("模型数据为空，请先设计流程并成功保存，再进行发布。");
11 }
12 JsonNode modelNode = modelNode = new ObjectMapper().readTree(bytes);
13
14 BpmnModel model = new BpmnJsonConverter().convertToBpmnModel(modelNode);
15 if (model.getProcesses().size() == 0) {
16 return JsonUtil.getFailJson("数据模型不符要求，请至少设计一条主线流程。");
17 }
18 byte[] bpmnBytes = new BpmnXMLConverter().convertToXML(model);
19
20 //发布流程
21 String processName = modelData.getName() + ".bpmn20.xml";
22 Deployment deployment = repositoryService.createDeployment()
23 .name(modelData.getName())
24 .addString(processName, new String(bpmnBytes, "UTF-8"))
25 .deploy();
26 modelData.setDeploymentId(deployment.getId());
27 repositoryService.saveModel(modelData);
28 return JsonUtil.getSuccessJson("流程发布成功");
29 }

<dependency>
<groupId>org.apache.xmlgraphics</groupId>
<artifactId>batik-codec</artifactId>
<version>1.7</version>
</dependency>
<dependency>
<groupId>org.apache.xmlgraphics</groupId>
<artifactId>batik-css</artifactId>
<version>1.7</version>
</dependency>
<dependency>
<groupId>org.apache.xmlgraphics</groupId>
<artifactId>batik-svg-dom</artifactId>
<version>1.7</version>
</dependency>
<dependency>
<groupId>org.apache.xmlgraphics</groupId>
<artifactId>batik-svggen</artifactId>
<version>1.7</version>
</dependency>