diff --git a/ruoyi-modules/ruoyi-gen/src/main/java/org/dromara/gen/service/GenTableServiceImpl.java b/ruoyi-modules/ruoyi-gen/src/main/java/org/dromara/gen/service/GenTableServiceImpl.java
index 1572b8cfe..7aea705c3 100644
--- a/ruoyi-modules/ruoyi-gen/src/main/java/org/dromara/gen/service/GenTableServiceImpl.java
+++ b/ruoyi-modules/ruoyi-gen/src/main/java/org/dromara/gen/service/GenTableServiceImpl.java
@@ -332,23 +332,9 @@ public class GenTableServiceImpl implements IGenTableService {
     @Override
     public Map<String, String> previewCode(Long tableId) {
         Map<String, String> dataMap = new LinkedHashMap<>();
-        // 查询表信息
-        GenTable table = getGenTable(tableId);
-        List<Long> menuIds = new ArrayList<>();
-        for (int i = 0; i < 6; i++) {
-            menuIds.add(IdGeneratorUtil.nextLongId());
-        }
-        table.setMenuIds(menuIds);
-        // 设置主键列信息
-        setPkColumn(table);
-
-        Dict context = TemplateEngineUtils.buildContext(table);
-        // 获取模板列表
-        List<PathNamedTemplate> templates = TemplateEngineUtils.getTemplateList(table.getTplCategory());
-        for (PathNamedTemplate template : templates) {
-            // 渲染模板
-            String render = template.render(context);
-            dataMap.put(template.getPathName(), render);
+        RenderContext rc = buildRenderContext(tableId);
+        for (PathNamedTemplate template : rc.templates()) {
+            dataMap.put(template.getPathName(), template.render(rc.context()));
         }
         return dataMap;
     }
@@ -474,25 +460,12 @@ public class GenTableServiceImpl implements IGenTableService {
      * @param zip     代码压缩输出流
      */
     private void generatorCode(Long tableId, ZipOutputStream zip) {
-        // 查询表信息
-        GenTable table = getGenTable(tableId);
-        List<Long> menuIds = new ArrayList<>();
-        for (int i = 0; i < 6; i++) {
-            menuIds.add(IdGeneratorUtil.nextLongId());
-        }
-        table.setMenuIds(menuIds);
-        // 设置主键列信息
-        setPkColumn(table);
-
-        Dict context = TemplateEngineUtils.buildContext(table);
-        // 获取模板列表
-        List<PathNamedTemplate> templates = TemplateEngineUtils.getTemplateList(table.getTplCategory());
-        for (PathNamedTemplate template : templates) {
+        RenderContext rc = buildRenderContext(tableId);
+        GenTable table = rc.table();
+        for (PathNamedTemplate template : rc.templates()) {
             String pathName = template.getPathName();
-            // 渲染模板
             try {
-                String render = template.render(context);
-                // 添加到zip
+                String render = template.render(rc.context());
                 zip.putNextEntry(new ZipEntry(TemplateEngineUtils.getFileName(pathName, table)));
                 IoUtil.write(zip, StandardCharsets.UTF_8, false, render);
                 zip.flush();
@@ -503,6 +476,28 @@ public class GenTableServiceImpl implements IGenTableService {
         }
     }
 
+    /**
+     * 构建代码渲染上下文（含表信息、菜单ID、主键列、模板列表）
+     *
+     * @param tableId 业务表主键
+     * @return 渲染上下文
+     */
+    private RenderContext buildRenderContext(Long tableId) {
+        GenTable table = getGenTable(tableId);
+        List<Long> menuIds = new ArrayList<>();
+        for (int i = 0; i < 6; i++) {
+            menuIds.add(IdGeneratorUtil.nextLongId());
+        }
+        table.setMenuIds(menuIds);
+        setPkColumn(table);
+        Dict context = TemplateEngineUtils.buildContext(table);
+        List<PathNamedTemplate> templates = TemplateEngineUtils.getTemplateList(table.getTplCategory());
+        return new RenderContext(table, context, templates);
+    }
+
+    private record RenderContext(GenTable table, Dict context, List<PathNamedTemplate> templates) {
+    }
+
     /**
      * 修改保存参数校验
      *
diff --git a/ruoyi-modules/ruoyi-gen/src/main/java/org/dromara/gen/util/TemplateEngineUtils.java b/ruoyi-modules/ruoyi-gen/src/main/java/org/dromara/gen/util/TemplateEngineUtils.java
index b9d0f39b8..16e7b9ede 100644
--- a/ruoyi-modules/ruoyi-gen/src/main/java/org/dromara/gen/util/TemplateEngineUtils.java
+++ b/ruoyi-modules/ruoyi-gen/src/main/java/org/dromara/gen/util/TemplateEngineUtils.java
@@ -111,7 +111,7 @@ public class TemplateEngineUtils {
 
         // 向树形模板上下文写入树字段相关变量
         if (GenConstants.TPL_TREE.equals(tplCategory)) {
-            setTreeContext(context, genTable);
+            setTreeContext(context, genTable, paramsObj);
         }
 
         return context;
@@ -120,12 +120,11 @@ public class TemplateEngineUtils {
     /**
      * 向树形模板上下文写入树字段相关变量。
      *
-     * @param context  模板上下文
-     * @param genTable 代码生成业务表对象
+     * @param context    模板上下文
+     * @param genTable   代码生成业务表对象
+     * @param paramsObj  已解析的 options 参数（避免重复解析）
      */
-    public static void setTreeContext(Dict context, GenTable genTable) {
-        String options = genTable.getOptions();
-        Dict paramsObj = JsonUtils.parseMap(options);
+    public static void setTreeContext(Dict context, GenTable genTable, Dict paramsObj) {
         String treeCode = getTreeCode(paramsObj);
         String treeParentCode = getTreeParentCode(paramsObj);
         String treeName = getTreeName(paramsObj);
@@ -133,7 +132,17 @@ public class TemplateEngineUtils {
         context.put("treeCode", treeCode);
         context.put("treeParentCode", treeParentCode);
         context.put("treeName", treeName);
-        context.put("expandColumn", getExpandColumn(genTable));
+        String expandTreeName = paramsObj.getStr(GenConstants.TREE_NAME);
+        int expandColumn = 0;
+        for (GenTableColumn column : genTable.getColumns()) {
+            if (column.isList()) {
+                expandColumn++;
+                if (column.getColumnName().equals(expandTreeName)) {
+                    break;
+                }
+            }
+        }
+        context.put("expandColumn", expandColumn);
         if (paramsObj.containsKey(GenConstants.TREE_PARENT_CODE)) {
             context.put("tree_parent_code", paramsObj.get(GenConstants.TREE_PARENT_CODE));
         }
@@ -209,14 +218,11 @@ public class TemplateEngineUtils {
         // genFilePathFormat
         if (template.contains("domain.java.vm")) {
             fileName = StringUtils.format("{}/domain/{}.java", javaPath, className);
-        }
-        if (template.contains("vo.java.vm")) {
+        } else if (template.contains("vo.java.vm")) {
             fileName = StringUtils.format("{}/domain/vo/{}Vo.java", javaPath, className);
-        }
-        if (template.contains("bo.java.vm")) {
+        } else if (template.contains("bo.java.vm")) {
             fileName = StringUtils.format("{}/domain/bo/{}Bo.java", javaPath, className);
-        }
-        if (template.contains("mapper.java.vm")) {
+        } else if (template.contains("mapper.java.vm")) {
             fileName = StringUtils.format("{}/mapper/{}Mapper.java", javaPath, className);
         } else if (template.contains("service.java.vm")) {
             fileName = StringUtils.format("{}/service/I{}Service.java", javaPath, className);
@@ -370,27 +376,4 @@ public class TemplateEngineUtils {
         }
         return StringUtils.EMPTY;
     }
-
-    /**
-     * 获取需要在哪一列上面显示展开按钮
-     *
-     * @param genTable 业务表对象
-     * @return 展开按钮列序号
-     */
-    public static int getExpandColumn(GenTable genTable) {
-        String options = genTable.getOptions();
-        Dict paramsObj = JsonUtils.parseMap(options);
-        String treeName = paramsObj.getStr(GenConstants.TREE_NAME);
-        int num = 0;
-        for (GenTableColumn column : genTable.getColumns()) {
-            if (column.isList()) {
-                num++;
-                String columnName = column.getColumnName();
-                if (columnName.equals(treeName)) {
-                    break;
-                }
-            }
-        }
-        return num;
-    }
 }