fix 修复图片预览问题

ruoyi-common/ruoyi-common-oss/src/main/java/org/dromara/common/oss/core/OssClient.java

@@ -201,10 +201,11 @@ public class OssClient {
      * @param inputStream 要上传的输入流
      * @param key         在 Amazon S3 中的对象键
      * @param length      输入流的长度
+     * @param contentType 文件内容类型
      * @return UploadResult 包含上传后的文件信息
      * @throws OssException 如果上传失败，抛出自定义异常
      */
-    public UploadResult upload(InputStream inputStream, String key, Long length) {
+    public UploadResult upload(InputStream inputStream, String key, Long length, String contentType) {
         // 如果输入流不是 ByteArrayInputStream，则将其读取为字节数组再创建 ByteArrayInputStream
         if (!(inputStream instanceof ByteArrayInputStream)) {
             inputStream = new ByteArrayInputStream(IoUtil.readBytes(inputStream));
@@ -219,6 +220,7 @@ public class OssClient {
                     .putObjectRequest(
                         y -> y.bucket(properties.getBucketName())
                             .key(key)
+                            .contentType(contentType)
                             .build())
                     .build());
 
@@ -335,7 +337,7 @@ public class OssClient {
      * @throws OssException 如果上传失败，抛出自定义异常
      */
     public UploadResult uploadSuffix(byte[] data, String suffix) {
-        return upload(new ByteArrayInputStream(data), getPath(properties.getPrefix(), suffix), Long.valueOf(data.length));
+        return upload(new ByteArrayInputStream(data), getPath(properties.getPrefix(), suffix), Long.valueOf(data.length), FileUtils.getMimeType(suffix));
     }
 
     /**
@@ -348,7 +350,7 @@ public class OssClient {
      * @throws OssException 如果上传失败，抛出自定义异常
      */
     public UploadResult uploadSuffix(InputStream inputStream, String suffix, Long length) {
-        return upload(inputStream, getPath(properties.getPrefix(), suffix), length);
+        return upload(inputStream, getPath(properties.getPrefix(), suffix), length, FileUtils.getMimeType(suffix));
     }
 
     /**