diff --git a/src/main/java/org/redkale/net/http/HttpResourceServlet.java b/src/main/java/org/redkale/net/http/HttpResourceServlet.java
index 87840e446..968b9d8fd 100644
--- a/src/main/java/org/redkale/net/http/HttpResourceServlet.java
+++ b/src/main/java/org/redkale/net/http/HttpResourceServlet.java
@@ -250,7 +250,7 @@ public class HttpResourceServlet extends HttpServlet {
         if (watchThread == null && files.isEmpty()) {
             entry = createFileEntry(uri);
         } else {  //有缓存
-            entry = files.computeIfAbsent(uri, x -> createFileEntry(x));
+            entry = files.computeIfAbsent(uri, this::createFileEntry);
         }
         if (entry == null) {
             if (logger.isLoggable(Level.FINER)) {
@@ -259,8 +259,8 @@ public class HttpResourceServlet extends HttpServlet {
             finish404(request, response);
         } else {
             //file = null 表示资源内容在内存而不是在File中
-            //file = null 时必须传 filename
-            response.finishFile(entry.file == null ? entry.filename : null, entry.file, entry.content);
+            //file = null 时必须传 fileName
+            response.finishFile(entry.file == null ? entry.fileName : null, entry.file, entry.content);
         }
     }
 
@@ -291,7 +291,7 @@ public class HttpResourceServlet extends HttpServlet {
 
     protected static class FileEntry {
 
-        protected final String filename;
+        protected final String fileName;
 
         protected final File file; //如果所有资源文件打包成zip文件则file=null
 
@@ -303,14 +303,14 @@ public class HttpResourceServlet extends HttpServlet {
         public FileEntry(final HttpResourceServlet servlet, File file) {
             this.servlet = servlet;
             this.file = file;
-            this.filename = file.getName();
+            this.fileName = file.getName();
             update();
         }
 
-        public FileEntry(final HttpResourceServlet servlet, String filename, ByteArray content) {
+        public FileEntry(final HttpResourceServlet servlet, String fileName, ByteArray content) {
             this.servlet = servlet;
             this.file = null;
-            this.filename = filename;
+            this.fileName = fileName;
             this.content = content;
             this.servlet.cachedLength.add(this.content.length());
         }
@@ -324,7 +324,7 @@ public class HttpResourceServlet extends HttpServlet {
             }
             this.servlet = servlet;
             this.file = null;
-            this.filename = filename;
+            this.fileName = filename;
             this.content = out;
             this.servlet.cachedLength.add(this.content.length());
         }
diff --git a/src/main/java/org/redkale/net/http/HttpResponse.java b/src/main/java/org/redkale/net/http/HttpResponse.java
index e95b23aad..35c303364 100644
--- a/src/main/java/org/redkale/net/http/HttpResponse.java
+++ b/src/main/java/org/redkale/net/http/HttpResponse.java
@@ -1210,15 +1210,15 @@ public class HttpResponse extends Response<HttpContext, HttpRequest> {
     /**
      * 将指定文件句柄或文件内容按指定文件名输出，若fileBody不为null则只输出fileBody内容
      * file 与 fileBody 不能同时为空
-     * file 与 filename 也不能同时为空
+     * file 与 fileName 也不能同时为空
      *
-     * @param filename 输出文件名
+     * @param fileName 输出文件名
      * @param file     输出文件
      * @param fileBody 文件内容， 没有则输出file
      *
      * @throws IOException IO异常
      */
-    protected void finishFile(final String filename, final File file, ByteArray fileBody) throws IOException {
+    protected void finishFile(final String fileName, final File file, ByteArray fileBody) throws IOException {
         if ((file == null || !file.isFile() || !file.canRead()) && fileBody == null) {
             finish404();
             return;
@@ -1231,14 +1231,12 @@ public class HttpResponse extends Response<HttpContext, HttpRequest> {
             //return;
         }
         this.contentLength = length;
-        if (filename != null && !filename.isEmpty() && file != null) {
+        if (Utility.isNotEmpty(fileName) && file != null) {
             if (this.header.getValue("Content-Disposition") == null) {
-                addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8"));
+                addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
             }
         }
-        if (this.contentType == null) {
-            this.contentType = MimeType.getByFilename(filename == null || filename.isEmpty() ? file.getName() : filename);
-        }
+        this.contentType = MimeType.getByFilename(Utility.isEmpty(fileName) && file != null ? file.getName() : fileName);
         if (this.contentType == null) {
             this.contentType = "application/octet-stream";
         }