VaultOdvExporter.java 文件源码

@Override
protected void writeToFile(List<ExportEntry> csvEntries) throws IOException {
    // Setup compression stuff
    ZipOutputStream zos = new ZipOutputStream(fileOutpuStream);
    zos.setMethod(ZipOutputStream.DEFLATED);
    zos.setLevel(9);

    // Setup signature stuff
    MessageDigest md;
    try {
        md = MessageDigest.getInstance("SHA-512");
    } catch (NoSuchAlgorithmException ex) {
        LOG.log(Level.SEVERE, "Missing hash algorithm for signature. No file exported!", ex);
        throw new IOException("Missing hash algorithm for signature.");
    }
    DigestOutputStream dos = new DigestOutputStream(zos, md);

    // write data        
    zos.putNextEntry(new ZipEntry(DATA_ZIP_ENTRY));
    CsvWriter cwriter = new CsvWriter(dos, VaultCsvEntry.CSV_DELIMITER,
            Charset.forName("UTF-8"));

    cwriter.writeRecord(((CsvEntry) csvEntries.get(0)).getCsvHeaderRecord());
    for (ExportEntry item : csvEntries) {
        cwriter.writeRecord(((CsvEntry) item).toCsvRecord());
    }
    cwriter.flush();

    // add signature file
    zos.putNextEntry(new ZipEntry(SIGNATURE_ZIP_ENTRY));
    String sigString = (new HexBinaryAdapter()).marshal(md.digest());
    zos.write(sigString.getBytes(), 0, sigString.getBytes().length);

    // close everything
    cwriter.close();
    dos.close();
    zos.close();
    fileOutpuStream.close();
}