1、集成Activiti7版本，yudao-dependencies模块新增activiti依赖包；

2、流程文件上传部署API后端逻辑实现；

yudao-admin-server/src/main/java/cn/iocoder/yudao/adminserver/modules/activiti/service/process/ProcessService.java

@@ -0,0 +1,18 @@
+package cn.iocoder.yudao.adminserver.modules.activiti.service.process;
+
+import org.springframework.web.multipart.MultipartFile;
+
+/**
+ * 流程基础管理
+ *
+ * @author ZJQ
+ * @date 2021/9/5 21:00
+ */
+public interface ProcessService {
+
+    /**
+     * 上传流程文件，进行流程部署
+     * @param multipartFile 上传文件
+     */
+    void deployProcess(MultipartFile multipartFile);
+}

yudao-admin-server/src/main/java/cn/iocoder/yudao/adminserver/modules/activiti/service/process/impl/ProcessServiceImpl.java

@@ -0,0 +1,85 @@
+package cn.iocoder.yudao.adminserver.modules.activiti.service.process.impl;
+
+import cn.iocoder.yudao.adminserver.modules.activiti.service.process.ProcessService;
+import lombok.extern.slf4j.Slf4j;
+import org.activiti.engine.RepositoryService;
+import org.activiti.engine.repository.Deployment;
+import org.activiti.engine.repository.ProcessDefinition;
+import org.apache.commons.io.FilenameUtils;
+import org.springframework.stereotype.Service;
+import org.springframework.web.multipart.MultipartFile;
+
+import javax.annotation.Resource;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+import java.util.zip.ZipInputStream;
+import static cn.iocoder.yudao.adminserver.modules.system.enums.SysErrorCodeConstants.FILE_UPLOAD_FAILED;
+import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
+
+/**
+ * 流程基础管理
+ *
+ * @author ZJQ
+ * @date 2021/9/5 21:04
+ */
+@Service
+@Slf4j
+public class ProcessServiceImpl implements ProcessService {
+
+    private static final String BPMN20_XML = "bpmn20.xml";
+
+    @Resource
+    private RepositoryService repositoryService;
+
+    /**
+     * 上传流程文件，进行流程部署
+     * @param multipartFile 上传文件
+     */
+    @Override
+    public void deployProcess(MultipartFile multipartFile) {
+        String fileName = multipartFile.getOriginalFilename();
+        try (InputStream inputStream = multipartFile.getInputStream()){
+            Deployment deployment = getDeplymentByType(inputStream,fileName);
+            //获取部署成功的流程模型
+            List<ProcessDefinition> processDefinitions = repositoryService.createProcessDefinitionQuery().deploymentId(deployment.getId()).list();
+            processDefinitions.forEach((processDefinition)->{
+                //设置线上部署流程模型名字
+                String proDefId= processDefinition.getId();
+                repositoryService.setProcessDefinitionCategory(proDefId,fileName);
+                log.info("流程文件部署成功，流程ID="+proDefId);
+            });
+        } catch (IOException e) {
+           log.error("流程部署出现异常"+e);
+        }
+    }
+
+
+    /**
+     * 根据上传文件类型对应实现不同方式的流程部署
+     * @param inputStream 文件输入流
+     * @param fileName 文件名
+     * @return 文件部署流程
+     */
+    public Deployment getDeplymentByType(InputStream inputStream,String fileName){
+        Deployment deployment;
+        String type = FilenameUtils.getExtension(fileName);
+        switch (type){
+            case "bpmn":
+                String baseName = FilenameUtils.getBaseName(fileName);
+                deployment = repositoryService.createDeployment().addInputStream(baseName+"."+BPMN20_XML,inputStream).deploy();
+                break;
+            case "png":
+                deployment = repositoryService.createDeployment().addInputStream(fileName,inputStream).deploy();
+                break;
+            case "zip":
+            case "bar":
+                ZipInputStream zipInputStream = new ZipInputStream(inputStream);
+                deployment = repositoryService.createDeployment().addZipInputStream(zipInputStream).deploy();
+                break;
+            default:
+                throw exception(FILE_UPLOAD_FAILED);
+        }
+        return deployment;
+    }
+}