fix(部署流程): 修改部署流程方法，增加保存用户节点的表单信息

ruoyi-flowable/src/main/java/com/ruoyi/flowable/utils/ModelUtils.java

@@ -1,12 +1,11 @@
 package com.ruoyi.flowable.utils;
 
 import org.flowable.bpmn.converter.BpmnXMLConverter;
-import org.flowable.bpmn.model.BpmnModel;
-import org.flowable.bpmn.model.FlowElement;
 import org.flowable.bpmn.model.Process;
-import org.flowable.bpmn.model.StartEvent;
+import org.flowable.bpmn.model.*;
 import org.flowable.common.engine.impl.util.io.StringStreamSource;
 
+import java.util.ArrayList;
 import java.util.Collection;
 
 /**
@@ -45,9 +44,54 @@ public class ModelUtils {
      */
     public static StartEvent getStartEvent(BpmnModel model) {
         Process process = model.getMainProcess();
-        Collection<FlowElement> elements = process.getFlowElements();
-        return (StartEvent) elements.stream()
-            .filter(flowElement -> flowElement instanceof StartEvent)
-            .findFirst().orElse(null);
+        Collection<FlowElement> flowElements = process.getFlowElements();
+        return getStartEvent(flowElements);
+    }
+
+    /**
+     * 获取开始节点
+     *
+     * @param flowElements 流程元素集合
+     * @return 开始节点（未找到开始节点，返回null）
+     */
+    public static StartEvent getStartEvent(Collection<FlowElement> flowElements) {
+        for (FlowElement flowElement : flowElements) {
+            if (flowElement instanceof StartEvent) {
+                return (StartEvent) flowElement;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * 获取所有用户任务节点
+     *
+     * @param model bpmnModel对象
+     * @return 用户任务节点列表
+     */
+    public static Collection<UserTask> getAllUserTaskEvent(BpmnModel model) {
+        Process process = model.getMainProcess();
+        Collection<FlowElement> flowElements = process.getFlowElements();
+        return getAllUserTaskEvent(flowElements, null);
+    }
+
+    /**
+     * 获取所有用户任务节点
+     * @param flowElements 流程元素集合
+     * @param allElements 所有流程元素集合
+     * @return 用户任务节点列表
+     */
+    public static Collection<UserTask> getAllUserTaskEvent(Collection<FlowElement> flowElements, Collection<UserTask> allElements) {
+        allElements = allElements == null ? new ArrayList<>() : allElements;
+        for (FlowElement flowElement : flowElements) {
+            if (flowElement instanceof UserTask) {
+                allElements.add((UserTask) flowElement);
+            }
+            if (flowElement instanceof SubProcess) {
+                // 继续深入子流程，进一步获取子流程
+                allElements = getAllUserTaskEvent(((SubProcess) flowElement).getFlowElements(), allElements);
+            }
+        }
+        return allElements;
     }
 }