远程处理共享文件

private String manageFilePath;
private String manageFileName;
private String manageUserName;
private String managePassword;

public void downFile(String date, HttpServletResponse response) {
    FileResponse fileResponse = new FileResponse();
    SmbFileInputStream in = null;
    try {
        manageFilePath = URLDecoder.decode(manageFilePath, String.valueOf(StandardCharsets.UTF_8));
        //获取前一天
        String beforeDay = DateRiskUtil.getBeforeDay(date, 1);
        if (!manageFilePath.contains("smb:")) {
            manageFilePath = "smb:" + manageFilePath + "\\";
        }
        String filePath = manageFilePath.replace("\\", "/").replace("yyyymmdd", beforeDay);
        String fileName = manageFileName.replace("yyyymmdd", beforeDay);
        String newFilePath = filePath + fileName;
        NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication("", manageUserName, managePassword);
        SmbFile smbFile = new SmbFile(newFilePath, auth);
        if (!smbFile.exists()) {
            throw new Exception("没有找到对应的文件");
        }
        long maxFileSize = parseSize("5M");
        long fileSize = smbFile.length();
        if (fileSize > maxFileSize) {
            throw new Exception("文件大小超过最大的限制");
        }

        String smbFileName = smbFile.getName();
        if (smbFileName.contains(beforeDay)) {
            in = new SmbFileInputStream(smbFile);
            byte[] fileContent = new byte[(int) fileSize];
            int bytesRead = in.read(fileContent);
            if (bytesRead != fileSize) {
                throw new Exception("读取文件内容到字节数组的大小和原文件内容大小不一致");
            }
            fileResponse.setStatus("1");
            fileResponse.setFileContent(fileContent);
            fileResponse.setFailureReason("成功");
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

private long parseSize(String sizeStr) {
    String newSizeStr = sizeStr.toUpperCase().replace("[^0-9.]", "");
    double sizeValue = Double.parseDouble(newSizeStr);
    char lastChar = sizeStr.charAt(sizeStr.length() - 1);
    switch (lastChar) {
        case 'M':
        case 'B':
            return Math.round(sizeValue * 1024 * 1024);
        case 'K':
            return Math.round(sizeValue * 1024);
        case 'G':
            return Math.round(sizeValue * 1024 * 1024 * 1024);
        default:
            return Math.round(sizeValue);
    }
}

public class FileResponse {

private String status;

private String failureReason;

private byte[] fileContent;

}