fix

src/main/java/com/xydl/cac/model/spectrogram/SpectrogramModel.java

@@ -52,6 +52,6 @@ public class SpectrogramModel {
         byte[] bytes = new byte[length];
         dis.readFully(bytes);
         String str = new String(bytes, StandardCharsets.UTF_8);
-        return str.replaceAll("\\u0000", "");
+        return str.replaceAll("\u0000", "");
     }
 }