diff --git a/njzscloud-svr/src/main/java/com/njzscloud/dispose/common/utils/FileUtil.java b/njzscloud-svr/src/main/java/com/njzscloud/dispose/common/utils/FileUtil.java
new file mode 100644
index 0000000..19aebec
--- /dev/null
+++ b/njzscloud-svr/src/main/java/com/njzscloud/dispose/common/utils/FileUtil.java
@@ -0,0 +1,133 @@
+package com.njzscloud.dispose.common.utils;
+
+import cn.hutool.core.io.IoUtil;
+import cn.hutool.core.util.IdUtil;
+import cn.hutool.poi.excel.BigExcelWriter;
+import cn.hutool.poi.excel.ExcelUtil;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.poi.xssf.streaming.SXSSFSheet;
+
+import jakarta.servlet.ServletOutputStream;
+import jakarta.servlet.http.HttpServletResponse;
+import java.io.File;
+import java.io.IOException;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+/**
+ * File工具类,扩展
+ *
+ * @author ljw
+ * @date 2505-10-13
+ */
+@Slf4j
+public class FileUtil extends cn.hutool.core.io.FileUtil {
+
+ /**
+ * 系统临时目录
+ *
+ * windows 包含路径分割符,但Linux 不包含,
+ * 在windows \\==\ 前提下,
+ * 为安全起见 同意拼装 路径分割符,
+ *
+ * java.io.tmpdir
+ * windows : C:\Users/xxx\AppData\Local\Temp\
+ * linux: /temp
+ *
+ */
+ public static final String SYS_TEM_DIR = System.getProperty("java.io.tmpdir") + File.separator;
+
+ /**
+ * 导出excel,支持自定义文件名
+ */
+ public static void downloadExcel(List