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")
@@ -49,35 +53,54 @@ public class HuzhouUploadfileinfoController {
            path = "excelTemplate"+File.separator+path.substring(path.indexOf("/")+1);
            ClassPathResource classPathResource = new ClassPathResource(path);
            fileInputStream =classPathResource.getInputStream();
-        }else{
+            response.addHeader("content-disposition","attachment;filename="+URLEncoder.encode(fileName,"UTF-8")+";filename*=UTF-8''"+ URLEncoder.encode(fileName,"UTF-8"));
-            fileInputStream = new FileInputStream(path);
+            response.setContentType("application/octet-stream");
-            file = new File(path);
+            if(file!=null){
-        }
+                response.addHeader("Content-Length", "" + file.length());
-        response.addHeader("content-disposition","attachment;filename="+URLEncoder.encode(fileName,"UTF-8")+";filename*=UTF-8''"+ URLEncoder.encode(fileName,"UTF-8"));
+            }else{
-        response.setContentType("application/octet-stream");
+                response.addHeader("Content-Length", "" + fileInputStream.available());
-        if(file!=null){
+            }
-            response.addHeader("Content-Length", "" + file.length());
-        }else{
-            response.addHeader("Content-Length", "" + fileInputStream.available());
-        }
 
 //        response.setContentType("multipart/form-data");
-        BufferedInputStream inputStream =null;
+            BufferedInputStream inputStream =null;
-        try {
+            try {
-            ServletOutputStream outputStream = response.getOutputStream();
+                ServletOutputStream outputStream = response.getOutputStream();
-            inputStream = new BufferedInputStream(fileInputStream);
+                inputStream = new BufferedInputStream(fileInputStream);
-            byte[] bytes = new byte[1024];
+                byte[] bytes = new byte[1024];
-            int len =inputStream.read(bytes);
+                int len =inputStream.read(bytes);
-            while (len!=-1){
+                while (len!=-1){
-                outputStream.write(bytes,0,bytes.length);
+                    outputStream.write(bytes,0,bytes.length);
-                outputStream.flush();
+                    outputStream.flush();
-                len=inputStream.read(bytes);
+                    len=inputStream.read(bytes);
+                }
+            }finally {
+                if(inputStream!=null){
+                    inputStream.close();
+                }
             }
-        }finally {
+        }else{
-            if(inputStream!=null){
+            file = new File(path);
-                inputStream.close();
+            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")