2；图片上传条件拦截（格式jpg png，大小50M等）

ruoyi-admin/src/main/java/com/ruoyi/web/controller/common/CommonController.java

@@ -83,7 +83,7 @@ public class CommonController
             // 上传文件路径
             String filePath = RuoYiConfig.getUploadPath();
             // 上传并返回新文件名称
-            String fileName = FileUploadUtils.upload(filePath, file);
+            String fileName = FileUploadUtils.uploadImg(filePath, file);
             String url = serverConfig.getUrl() + fileName;
             AjaxResult ajax = AjaxResult.success();
             ajax.put("url", url);

ruoyi-common/src/main/java/com/ruoyi/common/utils/file/FileUploadUtils.java

@@ -86,6 +86,18 @@ public class FileUploadUtils
         }
     }
 
+    public static final String uploadImg(String baseDir, MultipartFile file) throws IOException
+    {
+        try
+        {
+            return upload(baseDir, file, MimeTypeUtils.DEFAULT_IMG_ALLOWED_EXTENSION);
+        }
+        catch (Exception e)
+        {
+            throw new IOException(e.getMessage(), e);
+        }
+    }
+
     /**
      * 文件上传
      *

ruoyi-common/src/main/java/com/ruoyi/common/utils/file/MimeTypeUtils.java

@@ -38,6 +38,10 @@ public class MimeTypeUtils
             // pdf
             "pdf" };
 
+    public static final String[] DEFAULT_IMG_ALLOWED_EXTENSION = {
+            // 图片
+            "jpg", "png"};
+
     public static String getExtension(String prefix)
     {
         switch (prefix)