客户端-影像资料，上传的文件在数据列表显示大小

blade-service/blade-business/src/main/java/org/springblade/business/controller/ImageClassificationFileController.java

@@ -57,10 +57,10 @@ import org.springblade.business.service.IImageClassificationFileService;
 import org.springblade.core.boot.ctrl.BladeController;
 import org.springframework.web.multipart.MultipartFile;
 
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.io.InputStream;
+import java.io.*;
+import java.net.URL;
+import java.net.URLConnection;
+import java.text.DecimalFormat;
 import java.util.*;
 import java.util.stream.Collectors;
 
@@ -583,6 +583,14 @@ public class ImageClassificationFileController extends BladeController {
         try {
             ImageClassificationFile newFile = this.copyBeanData(fileVO, true);
             this.setUserData(null, newFile, false);
+            String[] urls = fileVO.getImageUrl().split(",");
+            Long total = 0L;
+            for (String url : urls) {
+                long urlSize = getResourceLength(url);
+                total += urlSize;
+            }
+            String size = formatSize(total);
+            newFile.setFileSize(size);
             //落库数据
             return R.status(this.imageClassificationFileService.save(newFile));
         } catch (Exception e) {
@@ -680,4 +688,39 @@ public class ImageClassificationFileController extends BladeController {
         }
     }
 
+    /**
+     *
+     * @param urlStr
+     * @return  返回Url资源大小
+     * @throws IOException
+     */
+    public long getResourceLength(String urlStr) throws IOException {
+        URL url=new URL(urlStr);
+        URLConnection urlConnection=url.openConnection();
+        urlConnection.connect();
+        //返回响应报文头字段Content-Length的值
+        return urlConnection.getContentLength();
+    }
+    /**
+     * 根据字节返回文件大小
+     */
+    private String formatSize(long fileS) {
+        DecimalFormat df = new DecimalFormat("#.00");
+        String fileSizeString = "";
+        String wrongSize = "0B";
+        if (fileS == 0) {
+            return wrongSize;
+        }
+        if (fileS < 1024) {
+            fileSizeString = df.format((double) fileS) + "B";
+        } else if (fileS < 1048576) {
+            fileSizeString = df.format((double) fileS / 1024) + "KB";
+        } else if (fileS < 1073741824) {
+            fileSizeString = df.format((double) fileS / 1048576) + "MB";
+        } else {
+            fileSizeString = df.format((double) fileS / 1073741824) + "GB";
+        }
+        return fileSizeString;
+    }
+
 }