判断是否有/或//逻辑

String fileUrl = null;
        if (StringUtils.isNotBlank(rootDirectory)) {
            if (filePath.startsWith("/")) {
                fileUrl = rootDirectory +"/"+getServerDirByType(attachType)+ filePath;
            } else {
                fileUrl = rootDirectory +"/"+getServerDirByType(attachType) + "/" + filePath;
            }
        }
        if(StringUtils.isNotBlank(fileUrl) && fileUrl.contains("//")){
            fileUrl = fileUrl.replaceAll("//","/");
        }