修改二维码生成策略，避免重复的二维码

src/main/java/com/jeeplus/modules/warehouse/qrcode/util/BuildQcUtil.java

@@ -27,6 +27,10 @@ public class BuildQcUtil {
         map.put("infoId", goodsInfo.getId());
         TwoDimensionCode.encoderQRCode(JSON.toJSONString(map), qrImgPath, "png", 6);
         File file = new File(qrImgPath);
+        File file2 = new File(imgPath);
+        if (file2.exists()) {
+            file2.delete();
+        }
         try {
             BufferedImage image = DrawQrcodeUtil.createAssetImageNew(file, qrCode);
             DrawQrcodeUtil drawQrcodeUtil = new DrawQrcodeUtil();