修改下载方法

huzhou/src/main/java/com/easy/admin/modules/huzhou/controller/HuzhouUploadfileinfoController.java

@@ -26,7 +26,11 @@ import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServletResponse;
 import java.io.*;
 import java.net.URLEncoder;
+import java.nio.channels.Channels;
+import java.nio.channels.FileChannel;
+import java.nio.channels.WritableByteChannel;
 import java.util.ArrayList;
+import java.util.HashMap;
 
 @RestController
 @RequestMapping("/huzhouUploadfileinfo")
@@ -49,10 +53,6 @@ public class HuzhouUploadfileinfoController {
            path = "excelTemplate"+File.separator+path.substring(path.indexOf("/")+1);
            ClassPathResource classPathResource = new ClassPathResource(path);
            fileInputStream =classPathResource.getInputStream();
-        }else{
-            fileInputStream = new FileInputStream(path);
-            file = new File(path);
-        }
             response.addHeader("content-disposition","attachment;filename="+URLEncoder.encode(fileName,"UTF-8")+";filename*=UTF-8''"+ URLEncoder.encode(fileName,"UTF-8"));
             response.setContentType("application/octet-stream");
             if(file!=null){
@@ -78,6 +78,29 @@ public class HuzhouUploadfileinfoController {
                     inputStream.close();
                 }
             }
+        }else{
+            file = new File(path);
+            try {
+
+                // 设置响应头
+                response.setHeader("content-disposition", "attachment;filename=" +
+                        URLEncoder.encode(fileName, "UTF-8") +
+                        ";filename*=UTF-8''" + URLEncoder.encode(fileName, "UTF-8"));
+                response.setContentType("application/octet-stream");
+                response.setContentLength((int) file.length());
+
+                // 使用NIO通道
+                try (FileChannel fileChannel = new FileInputStream(file).getChannel();
+                     WritableByteChannel outputChannel = Channels.newChannel(response.getOutputStream())) {
+                    // 使用transferTo方法直接传输数据
+                    fileChannel.transferTo(0, file.length(), outputChannel);
+                }
+            } catch (Exception e) {
+                throw new RuntimeException("文件下载失败", e);
+            }
+        }
+
+
     }
 
     @GetMapping("/uploacFilePageList")