调整 音频合成

src/main/java/com/rj/utils/MinIOUtil.java

@@ -399,7 +399,15 @@ public class MinIOUtil {
      */
     public String getPresignedObjectUrl(String bucketName, String objectName, int expires) {
         try {
-            return minioClient.getPresignedObjectUrl(
+            // 检查文件是否存在
+            if (!objectExists(bucketName, objectName)) {
+                log.error("文件不存在: bucket={}, object={}", bucketName, objectName);
+                return null;
+            }
+            
+            log.info("生成预签名URL: bucket={}, object={}, expires={}秒", bucketName, objectName, expires);
+            
+            String presignedUrl = minioClient.getPresignedObjectUrl(
                     GetPresignedObjectUrlArgs.builder()
                             .method(Method.GET)
                             .bucket(bucketName)
@@ -407,12 +415,37 @@ public class MinIOUtil {
                             .expiry(expires, TimeUnit.SECONDS)
                             .build()
             );
+            
+            log.info("生成的预签名URL: {}", presignedUrl);
+            return presignedUrl;
         } catch (Exception e) {
-            log.error("获取预签名URL失败: {}", e.getMessage());
+            log.error("获取预签名URL失败: bucket={}, object={}, error={}", bucketName, objectName, e.getMessage());
             return null;
         }
     }
 
+    /**
+     * 检查对象是否存在
+     * 
+     * @param bucketName 存储桶名称
+     * @param objectName 对象名称
+     * @return 是否存在
+     */
+    public boolean objectExists(String bucketName, String objectName) {
+        try {
+            minioClient.statObject(
+                    StatObjectArgs.builder()
+                            .bucket(bucketName)
+                            .object(objectName)
+                            .build()
+            );
+            return true;
+        } catch (Exception e) {
+            log.debug("对象不存在: bucket={}, object={}, error={}", bucketName, objectName, e.getMessage());
+            return false;
+        }
+    }
+
     /**
      * 获取文件预签名URL（默认7天过期）
      *